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Vigilohm IM400 - Insulation Monitoring Device

1. Insulation Fault Loeatl nss su dais rra Aaa Injection Inhibition Input and Exclusion Management s sseeoeonon SC TESE un once eine eRe A A a ee ae ee Human Machine Interface 0 0 n eee ee Vigilohm IM400 Menu Structure 0 0 eee n n nn nan Navigating the Interface 0 cc eee won n n own non won non non SAIS CO CS O A te SON a date e A te tye etan ei asi ane eee A Special Status Screens dd A A e kak ee ae Modifying Parameters devwe ai da caro ar ke ie a a CICESE e aye rena te E A A INSUlAUOM Faulk Eog ess ol ab si ian aria o cta bo A Trend Screens zur are A an e de sedan A e aaa VA on e aie Communication via Modbus RS 485 ee ran konn es Configuring RS 485 Communication POrft est we eee non non won Table of Modbus Functions L L l L L kt L kk kt n ka n w w a n a a n n w w n n a won n n n kon a n n n n nn Viodbus Registers Tables 4 0 Her ee Maintenance and Troubleshooting 0ooooooooooooo ooo Sale Precautions scene leere una Tore Din ir COMMISSIONING si A AA Dr IR Sn int Maintenance and Troubleshooting es ee vu nenne n wonn non Specifications w ew feed a wink rar da iaa S POCHE ANONS e oe a a en Es DOCA0049EN 01 06 2013 Safety Information Important Information NOTICE PLEASE NOTE Read these instructions carefully and look at the equipment to become familiar with th
2. Press YY to validate the password entry If the password has been entered correctly the protection system stays unlocked for 30 seconds or as long as you are editing parameters If the password has been entered incorrectly an error message is displayed and you must enter the password again Use the ESC button to revert to the previous screen DOCA0049EN 01 06 2013 63 Vigilohm IM400 Human Machine Interface Clock Description Icon Setting Date Time Format Vigilohm IM400 uses the date and time parameter to time tag the system insulation faults recorded The time must be set e whenever the power supply is interrupted e when switching from winter to summer time and back lf the auxiliary power supply is interrupted Vigilohm IM400 retains the date and time setting from immediately before the interruption When Vigilohm IM400 is powered up the clock icon flashes on the system monitoring screens to indicate that the clock needs to be set Pressing the top contextual button displays the clock setup screen To set the date and time refer to the procedure for modifying a numerical value see page 62 The date is displayed in the format dd mm yyyy The time is displayed using the 24 hour clock in the format hh mm 64 DOCA0049EN 01 06 2013 Vigilohm IM400 Human Machine Interface Insulation Fault Log Description Insulation Fault Event Screen Vigilohm IM400 records the deta
3. 09 Flashing amp ofr or Vigilohm IM400 energized Injection de activated by using injection inhibition input S ofr Co OFF Vigilohm IM400 energized Modbus communication active Vigilohm IM400 energized but inoperative The IM400 product and its installation should be checked by a maintenance operator Insulation Alarm and Preventive Insulation Alarm Thresholds 2 methods are available for changing the Vigilohm IM400 insulation alarm and preventive insulation alarm thresholds e manually set the corresponding parameter by selecting Menu Settings Ins Alarm or e use Modbus communication see page 70 The available settings for the insulation alarm and preventive insulation alarm thresholds are as follows Threshold Setting Range Factory Value Insulation alarm 0 1 500 kQ 1 kQ Preventive insulation alarm e 1kQ 1MQ OFF e OFF Insulation alarm and preventive insulation alarm thresholds are saved in an internal non volatile memory They remain unchanged after a power cut The preventive insulation alarm threshold must always be set higher than the insulation alarm threshold Insulation Alarm and Preventive Insulation Alarm Time Delays Insulation alarm and preventive insulation alarm delays are time filters They are used to filter transient insulation faults The Vigilohm IM400 does not report insulation faults that do not remain for a duratio
4. E 07 11 2012 15 08 L K 07 11 2012 18 22 l A 1 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 05 11 2012 09 19 HE 07 11 2012 14 08 07 11 2012 21 19 4 After correcting the insulation fault in the power system the insulation fault alarm relay does not toggle for 3 s 45 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Operation on Systems with a Voltage Greater Than 480 Vac dc Operation A voltage adaptor is required when the device is connected to one of the following systems e system voltage greater than 830 Vac Ph Ph and the Vigilohm IM400 is connected to an accessible neutral e system voltage greater than 480 Vac and the Vigilohm IM400 is connected to a phase non accessible neutral e system voltage greater than 480 Vdc See the specifications for information about the maximum voltage see page 84 For Vigilohm IM400 operation without insulation fault location XD301 XD312 XD308C or XRM not used the IM400 1700 voltage adaptor can be used For Vigilohm IM400 operation with insulation fault location XD301 XD312 XD308C or XRM used the PHT1000 voltage adaptor must be used NOTE The V Adaptor parameter cannot be set up as HV1700 if the parameter Fault locating is set to ON V Adaptor Parameter Configure the V Adaptor parameter as follows e HV1700 for the IM400 1700 voltage adaptor e PHT100
5. D3 Auxiliary Contact IIA A VA VA AAVV Using circuit breakers with Normally Closed NC auxiliary contacts Incoming feeder 1 Incoming feeder 2 Incoming feeder 3 a MV LV KAD IM400 no 1 Inhibit Input NO Injection Inhibition Input MV LV amp MV LV Y IM400 Inhibit Input NC no 3 Inhibit Input NC Injection Inhibition Input Injection Inhibition Input ee le a Auxiliary Contact IIA VAY VA VA The IMD priority is as follows e IM400 no 1 is the IMD with the highest priority 1 it always injects into the systems no matter if D1 is closed or open e IM400 no 2 is the IMD with priority 2 it always injects into the system except when there is a closed path between it and one IMD with a higher priority that is in this case IM400 no 1 Therefore IM400 no 2 is inhibited when D2 and D1 are closed IM400 no 2 injection inhibition D1 AND D2 This logic is implemented by wiring the injection inhibition of IM400 no 2 to the 2 auxiliary contacts of D1 and D2 e IM400 no 3 is the IMD with priority 3 it always injects into the system except when there is a closed path between it and one IMD with a higher priority that is in this case IM400 no 1 or IM400 no 2 Therefore IM400 no 2 is inhibited when D3 and D2 are closed or D3 and D1 are closed IM400 no 3 injection inhibition D3 AND D1 OR D3 AND D2 D3 AND D1 OR D2 This logic is implemented by wiring the injection inhibition of IM400 no 3 to the auxili
6. gt INSULATION a A R 550 ka Display V 100 1k 10k 100k 1M 10M T 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k AM 10M 100 1k 10k 100k 1M 10M T 100 14k 10k 100k 1M 10M 05 11 2012 09 19 FE 07 11 2012 14 08 INS ALARM 2600s _ E 07 11 2012 15 08 Q K 07 11 2012 18 22 07 11 2012 21 19 3 Insulation fault alarm acknowledgement does not switch back the relays to their initial position DOCA0049EN 01 06 2013 43 Vigilohm IM400 Functions Corrected Insulation Fault Signal In order to facilitate insulation fault detection the insulation alarm relay can be reactivated for 3 seconds when the insulation level rises above the setup threshold This makes it easier to locate the insulation fault when using the method that involves opening each of the circuit breakers in turn Given that the circuit breakers may be located at some distance from the Vigilohm IM400 the external signal allows you to identify and locate the insulation fault when working remotely This option can be activated by changing the corresponding parameter To access the option select Menu Settings 1 0 Config Factory Value OFF Setting Setting Range Corr Fit Signal corrected fault signal ON OFF NOTE Corrected insulation fault signal is applicable only if the parameter Ack Al Relay acknowledgement insulation alarm relay is set to ON In system configurations where th
7. 103 104 R Uint16 Encoded version Firmware version X Y Z 0x0067 0x0068 X Y Z e X represents the primary revision number which is encoded in the most significant byte of register 102 e Y represents the secondary revision number which is encoded in the least significant byte of register 102 e Zrepresents the quality revision number which is encoded in register 103 Ox0069 105 108 0x006A 106 109 RW Date Time T1081 format Ox00O6C Ox006D see page 77 Ox0O6D 109 Ox006E 110 R Uint16 Product status e Most significant byte error code e Least significant byte product status e 0x00 Normal operation e 0x01 Self test e 0x02 Insulation fault e 0x03 Disconnected injection detected 0x04 Over limit capacitance 0x05 Inoperative product 0x06 Injection disabled 0x07 Overvoltage Monitoring Address Register Number RW Unit Type Range Description hex dec hex dec 0x03E8 1000 Ox03E9 1001 R Ohm Float32 Resistance When injection is inhibited the value NaN Not a Number OXxFFCO0000 is returned during self test 70 DOCA0049EN 01 06 2013 Vigilohm IM400 Communication Address Register Number RW Unit Type Range Description hex dec hex dec Ox03EA 1002 OxO3EB 1003 R F Float32 Capaci
8. 140kQ 100kQ 60kQ Maximum Insulation Alarm Ra 20kQ OF 100uF 200uF 300uF 400uF 500uF Leakage Capacitance C e Typical performance characteristics for control circuit application parameter App set to Control C Relative Error of Insulation Resistance Measurement over Leakage Capacitance Maximum Configurable Insulation Alarm Threshold as a Function of Leakage Capacitance 14 C 500uF C 50uF 12 10 8 6 Accuracy of R 4 2 1020 1002 1kQ 10kQ 100kQ 1MQ 10MQ Insulation Resistance Q T 200k2 160k2 140k2 100k2 Maximum Insulation Alarm R 8 x 5 20kQ OF 100pF 200pF 300uF 400uF 500uF Leakage Capacitance C e Typical performance characteristics for photovoltaic application parameter App set to Photovolt Relative Error of Insulation Resistance Measurement over Leakage Capacitance Maximum Configurable Insulation Alarm Threshold as a Function of Leakage Capacitance 14 C 1000uF C 2000pF C 500uF 12 10 8 6 Accuracy of R 4 2 102 1002 1kQ 10kQ 100k 1MQ Insulation Resistance Q 180kQ 140kQ 100kQ 60kQ 20kQ Maximum Insulation Alarm Ra OF 400uF 800uF 1200uF 1600uF 2000uF Leakage Capacitance C DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Monitoring the System Insulation Functional Description The Vigilohm monitors the IT system insulation resist
9. Ox0BC7 3015 0x0BC8 3016 RW Uinti6 e 0 0OFF Password protection e 1 ON Factory value O password protection deactivated DOCA0049EN 01 06 2013 73 Vigilohm IM400 Communication Address Register Number RW Unit Type Range Description hex dec hex dec OxOBC8 3016 Ox0BC9 3017 RW Uint16 e 0 English Interface language e 1 French Factory value O English e 2 Spanish e 3 Russian e 4 Chinese e 5 Italian e 6 German e 7 Portuguese Ox0BC9 3017 OxOBCA 3018 RW Uint16 10 100 Display contrast Factory value 50 Ox0BCA 3018 OxOBCB 3019 RW Uint16 10 100 Display brightness Factory value 100 OxOBCB 3019 Ox0BCC 3020 RW Uinti6 e 0 None Voltage adaptor e 1 IM400 1700 Factory value O no plate e 2 PHT1000 Ox0BCC 3020 OxOBCD 3021 RW Uint16 e 1 Standard Preventive insulation alarm connection relay logic command e 2 Failsafe Factory value 2 failsafe e 3 Mirror Ox0BCD 3021 OXOBCE 3022 RW s Uint16 0 7200 s Preventive insulation alarm time delay OxOBCE 3022 OxOBCF 3023 RW Uint16 eo 0 OFF Insulation alarm relay e 1 ON reactivation Factory value O ON relay triggers 3 s if insulation fault disappears in insulation alarm acknowledgement mode OxOBCF 3023 OxOBDO 3024 RW Uint16 e 0 OFF Insulation alarm relay e 1 ON acknowledgement Factory value 1 OxOBDO 3024 OxOBD1 3025 RW
10. Injection Inhibition Input IM400 Inhibit Input NO i no 2 Inhibit Input NO NW D1 Auxiliary Contact NO D2 Auxiliary Contact NO Auxiliary Contact NO ANNE Using circuit breakers with Incoming feeder 1 MV LV Y D1 NG Injection Inhibition Input Normally Closed NC auxiliary contacts Incoming feeder 2 a MV LV Y Injection Inhibition Input IM400 IM400 no 1 inhibit Input NC A no 2 Inhibit Input NC JS Auxiliary Contact NC TAT If Then The coupling C is closed the same applies as in the exclusion example above involving 2 incoming feeders e The coupling is open and e D1 is closed e D2 is closed the 2 Vigilohm IM400 devices are active e Vigilohm IM400 no 1 monitors the insulation of system 1 Vigilohm IM400 no 2 monitors the insulation of system 2 Vigilohm IM400 no 2 must be inhibited when the following 3 conditions are met e Di is closed e D2 is closed e C is closed DOCA0049EN 01 06 2013 49 Vigilohm IM400 Functions Example of Exclusion with 3 Incoming Feeders Using circuit breakers with Normally Open NO auxiliary contacts Incoming feeder 1 Incoming feeder 2 Incoming feeder 3 a MV LV Y IM400 no 1 inhibit Input NO Injection Inhibition Input MV LV MV LV IM400 Inhibit Input NO no 3 Injection Inhibition Input Inhibit Input NO Injection Inhibition Input
11. Settings Modbus Parameters Authorized Values Factory Value Address 1 247 1 Auto Config ON OFF OFF Baud rate e 4800 Baud 19 200 Baud e 9600 Baud e 19200 Baud e 38 400 Baud Parity e Even Even e Odd e None In point to point mode when the device is directly connected to a computer the reserved address 248 can be used to communicate with the device whatever the device internal address Signaling of Communication Activity The yellow Sv indicator light indicates the status of the activity on the Modbus RS485 bus as follows If Then the indicator light is flashing communication on the bus is active the indicator light is off there is no active communication between master and slave NOTE The yellow indicator light flashes on every valid Modbus frame even if the Vigilohm IM400 is not addressed directly 68 DOCA0049EN 01 06 2013 Vigilohm IM400 Communication Table of Modbus Functions Modbus Functions Function Code Function Name Decimal Hexadecimal 3 0x03 Read Holding Registers 4 0x04 Read Input Registers 6 0x06 Write Single Register 8 0x08 Diagnostics 16 0x10 Write Multiple Registers 67 14 0x43 14 Read Device Identification 67 15 0x43 15 Get Date Time 67 16 0x43 16 Set Date Time 1 The Read Holding and Read Input registers are identical The read device identification re
12. XRM mobile insulation fault locators to detect where the insulation fault is located Activate or deactivate this feature through Fault Locating parameter 2 settings are available for the Fault Locating parameter Parameter Value Description OFF The Vigilohm IM400 does not inject a fault locating current ON The Vigilohm IM400 injects a fault locating current compatible with XD301 XD312 XD308C and XRM devices Insulation fault location is not compatible with HV1700 voltage adaptor Voltage Adaptors The Vigilohm IM400 can be used with IM400 1700 and PHT1000 voltage adaptors to monitor power systems with a rated voltage above 480 Vac dc IM400 1700 voltage adaptor can also be used in power systems below 480 Vac dc to increase the internal impedance of the Vigilohm IM400 3 settings are available for the V Adaptor parameter Parameter Value Description None Vigilohm IM400 is directly connected to the monitored power system The power system should have a rated voltage lower or equal to 480 Vac dc HV1700 PHT1000 Vigilohm IM400 uses IM400 1700 voltage adaptor to connect to the monitored network see page 15 Locating an insulation fault cannot be done using Vigilohm IM400 with IM400 1700 HV1700 cannot be set up when the parameter Fault Locating is set to ON Vigilohm IM400 uses PHT1000 voltage adaptor to connect to the monitored network see page 15 Locating an insulation
13. Screen Vigilohm IM400 records and can display curves of the average of the system insulation over the following durations last hour 1 point every 2 minutes last day 1 point per hour last week 1 point per day last month 1 point per day last year 1 point per month The chart scale automatically adjusts to the shown data to optimize the display accuracy The curves show a general trend how the system insulation evolves over time They are calculated from averages related to shorter or longer durations depending on the charts So charts may not show transient insulation faults when they are smoothed over time lol TREND DE S kan 1 On Legend Description 1 Trend 2 Current value of the insulation alarm threshold 3 Vertical dotted line indicates a power interruption duration undefined 4 Squared area indicates that the injection has been inhibited 66 DOCA0049EN 01 06 2013 Communication via Modbus RS 485 What Is in This Chapter This chapter contains the following topics Topic Page Configuring RS 485 Communication Port 68 Table of Modbus Functions 69 Modbus Registers Tables 70 DOCA0049EN 01 06 2013 67 Vigilohm IM400 Communication Configuring RS 485 Communication Port Communication Parameters Before initiating any communication processes configure the Modbus communication port via the HMI on Vigilohm IM400 selecting Menu
14. What Is in This Chapter This chapter contains the following topics Topic Page R and C Measurement 32 Configuration and Accuracy Zones by Application 33 Monitoring the System Insulation 37 Operation on Systems with a Voltage Greater Than 480 Vac dc 46 Insulation Fault Location 47 Injection Inhibition Input and Exclusion Management 48 Self Test 53 DOCA0049EN 01 06 2013 31 Vigilohm IM400 Functions R and C Measurement Insulation Measurements Vigilohm IM400 is designed e to monitor the IT power system insulation e to measure e the insulation resistance R Q continuously e C which is the leakage capacitance of the distribution system to ground uF e to calculate the impedance Zc kQ associated with C General Information on the Measurement Accuracy of R There are 2 effects on the measurement accuracy of R e the effect of the leakage capacitance C e the effect of the frequency disturbances for example speed drives or inverters Effect of Leakage Capacitance on the Measurement Accuracy of R For IMDs using switching mode measurement signals the leakage capacitance C has an impact on the measurement accuracy of R The leakage capacitance C creates a leakage path for the measurement signal and reduces the level of the useful signal that flows through the insulation resistance R The Vigilohm IM400 injects a signal with very low frequencies and includes high performance
15. and has received safety training to recognize and avoid the hazards involved DOCA0049EN 01 06 2013 FCC Notice This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designated to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at this own expense DOCA0049EN 01 06 2013 About the Book Ata Glance Document Scope This manual is intended for use by designers panel builders installers system integrators and maintenance technicians who use ungrounded power systems IT with insulation monitoring devices IMDs Validity Note The Vigilohm IM400 is used to monitor lines to earth insulation of ungrounded power systems This includes industrial and marine electrical systems infrastructures and power generation systems such as photovoltaic and wind turbines Thanks to the adaptive multi frequency injection signal the Vigilohm IM400 is suitable for power and control circuits that contain switching power elec
16. contact It is then important at commissioning to validate that insulation of every part of the electrical power system is monitored by an active IMD and that the management of exclusion activation of each IMD does not lead to a part of the power system monitored by more than one IMD or by no IMD This in order to avoid insulation fault not being reported Insulation Metering and Insulation Fault Detection Testing To verify that Vigilohm IM400 is correctly installed and configured e It is recommended to check the installation by connecting a known impedance between wiring terminals 1 and 3 of the Vigilohm IM400 10 kQ and verifying that the impedance is correctly measured For this test do not connect Vigilohm IM400 to the monitored network e It is recommended to check the insulation fault detection by strapping wiring terminals 1 and 3 of Vigilohm IM400 creating a O Qinsulation fault For this test do not connect Vigilohm IM400 to the monitored network Insulation Alarm Relay Wiring Testing To check that the insulation alarm relay is correctly wired in the installation it is recommended to perform a device test with relay Disconnected Injection Detection If required in the application enable the disconnected injection detection parameter so that Vigilohm IM400 continuously performs this checking and reports any connection or wiring issue The Vigilohm IM400 is delivered with the disconnected injection detection parameter set to O
17. display and contextual menu buttons for accessing the information required to operate the Vigilohm and make parameter settings What Is in This Chapter This chapter contains the following topics Topic Page Vigilohm IM400 Menu Structure 56 Navigating the Interface 57 Status Screens 59 Special Status Screens 61 Modifying Parameters 62 Clock 64 Insulation Fault Log 65 Trend Screens 66 DOCA0049EN 01 06 2013 55 Vigilohm IM400 Human Machine Interface Vigilohm IM400 Menu Structure Vigilohm IM400 Menu Structure MENU Monitoring eee IMPEDANCE C uF Ze KO SETUP SUMMARY Ins Alarm kQ Ins Al Delay s Prev Alarm KQ Filtering lO STATUS Ins Al Relay ON OFF Prev Al Rel ON OFF Injection ON OFF Logging Trend Settings Date Time Ins Alarm Ins Al Delay Prev Alarm Prev Al Del Disconnect Inj Ins Alarm App Filtering Fault Locating V Adapt Frequency Injection HRG Ins Al Relay Prev Al Rel Inhibit Input Ack Al Relay Corr Flt Signal Test w Relays Network I O Config Address Auto Config Baudrate Parity Password Modify Password Activation Display Contrast Backlight Reset Logs Reset Trends Modbus Reset Factory Reset Frangais Espanol Pycckun mx Italiano Deutsch Portugu s IMD IM400 QR Code Smartphone FW version Serial Identification 56 DOCA0049EN 0
18. in the following cases e The preventive insulation fault is being detected A special insulation status is detected see page 67 The product is inoperative detected by self test When the user triggers a self test with relays selecting Menu Settings 1 0 Config gt Test w Relays set to ON the insulation alarm relay toggles for 3 seconds see page 53 e The preventive insulation alarm relay is deactivated de energized in the following cases e No insulation fault is being detected e Insulation fault is being detected and acknowledged Acknowledgement of the insulation alarm relay is activated selecting Menu Settings 1 0 Config Ack Al Relay set to ON e The auxiliary power supply is lost When the preventive insulation alarm relay is set up in mirror mode selecting Menu Settings gt I O Config Prev Al Rel set to Mirror e The preventive insulation alarm relay mirrors Symmetrically matches the insulation alarm relay as long as the Vigilohm IM400 is operating correctly see page 26 e The preventive insulation alarm relay stops mirroring the insulation alarms when the Vigilohm IM400 is de energized or inoperative This feature can be used to detect an inoperative product 40 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Example of Application of Preventive Alarm Relay Mirror Mode Some applications require that when an IMD device becomes inoperative the system automatically switches to anothe
19. integration algorithms It makes it compatible with large power systems that have a high value of leakage Capacitance The Vigilohm IM400 correctly operates in power systems with leakage capacitance up to 500 uF and photovoltaic systems with leakage capacitance up to 2 000 LF Effect of Frequency Disturbances on the Measurement Accuracy of R Switching mode power electronic devices apply residual voltages between the power system and ground These voltages may interfere with IMDs measurements The Vigilohm IM400 injects an adaptive multi frequency measurement signal that makes it operate out of the disturbance range This measurement signal is combined with efficient integration algorithms to allow accurate measurements regardless of the frequency disturbances 32 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Configuration and Accuracy Zones by Application Configuration by Application Applications Vigilohm IM400 is designed and tested to be compliant with different applications e Power circuits industrial or marine applications that contain power loads and power electronics such as speed drives inverters or rectifiers e Control circuits auxiliary control circuits used to drive power systems These circuits contain sensitive loads such as PLCs IOs or sensors e Photovoltaic systems large photovoltaic power generation systems This application is characterized by high DC rated voltage 1 000 V and high system le
20. lt 600 V 100 440 a Listed FNQ R 1A lt 600 Vu 100 440 V fuse LP CC 1A lt 600 V For Canada only Auxiliary power I O Configuration FS IM400 supply is to be protected by transient Failsafe factory setting men suppression circuit not MOV ANA ai A ZZ 2 12 V 10 mA e O ee E 250 VA 3A lt 48 V Z1A Modbus RS 485 15 14 13 12 Same polarity Injection inhibition using external dry contact I O Configuration Std syon 24 VZ 5 mA y Standard A 6 9 212 V 10 mA 250 V 3A lt 48 Vz 1A Preventive Same polarity Insulation Alarm I O Configuration FS IM400 Failsafe factory setting Insulation Alarm m 8 11 7 10 6 9 O O O I O configured as Normally Closed OV DO A Rx A Tx Modbus RS 485 D1 B Rx B Tx The relay operating mode failsafe or standard is controlled via the HMI of the Vigilohm device or with Modbus communication NOTE Listed circuit breakers reference MGN61334 or equivalent can be used to replace listed fuses Connection Characteristics All the Vigilohm IM400 wiring terminals have identical wiring capabilities The table shows the characteristics of the cables that can be used to connect the wiring terminals Stripped Length Cross Section Area Tightening Torque Type of Screwdriver 7 mm 0 27 in 0 2 2 5 mm AWG 0 8 N m 7 Ib in Flat lt 3 mm lt 0 10 in 24 14 Cross section area and voltage rating
21. 0 for the PHT1000 voltage adaptor The factory value is None operation without voltage adaptor 46 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Insulation Fault Location Locating Insulation Faults Automatically Locating Insulation Vigilohm IM400 is compatible with the XDeee range of insulation fault locators from the Vigilohm offer e XD301 1 channel insulation fault locator with indicator light and 1 output relay commercial references 50506 50507 and 50508 e XD312 12 channel insulation fault locator with 1 indicator light per channel and 1 output relay commercial references 50535 50536 and 50537 e XD308C 8 channel insulation fault locator with communication requires an XLI300 communication interface commercial references 50723 50724 and 50725 The Insulation Fault Locating parameter must be configured to ON for proper operation The factory value is OFF in photovoltaic application ON for the other applications see page 33 Faults Manually From the Vigilohm offer the mobile insulation fault locating devices must be used for e the insulation fault location on a feeder not equipped with an automatic insulation fault locator or e facilitating the location of an insulation fault on a feeder The Insulation Fault Locating parameter must be configured to ON for proper operation The factory value is ON The signal injected by IM400 is compatible with the XP15 XP50 XP100 and XRM devices Procee
22. 001 Data invalid e 0x0002 Data valid e 0x0003 Power supply loss after this value e 0x0004 Injection after this value e 0x0005 Power supply loss and injection disable after this value DOCA0049EN 01 06 2013 71 Vigilohm IM400 Communication Address Register Number hex dec hex dec RW Unit Type Range Description 0x04BD 1213 OXO4BE 1214 Float32 Day value Reading day values Each reading decrements the counter at address 1201 0x04BF 1215 0x04C0 1216 Uint16 Day value status Status 0x0000 Data not initialized 0x0001 Data invalid 0x0002 Data valid 0x0003 Power supply loss after this value 0x0004 Injection disable after this value 0x0005 Power supply loss and injection disable after this value 0x04C0 0x04C2 1216 1218 0x04C1 0x04C3 1217 1219 Float32 Uint16 Week value Week value status Reading week values Each reading decrements the counter at address 1202 Status 0x0000 Data not initialized 0x0001 Data invalid 0x0002 Data valid 0x0003 Power supply loss after this value 0x0004 Injection disable after this value 0x0005 Power supply loss and injection disable after this value 0x04C3 1219 0x04C4 1220 Float32 Month value Reading month values Each reading decrements the counter at address 1203 0x04C5 1221 0x04C6 122
23. 1 06 2013 Vigilohm IM400 Human Machine Interface Navigating the Interface Presentation The diagram below illustrates the various elements for operating the Vigilohm 1 Screen identification area containing a menu icon and the name of the menu or parameter 2 Information area for displaying screen specific details measurement insulation alarm setting 3 Navigation buttons Navigation Buttons The navigation buttons enable quick and intuitive navigation HO HO iF Legend Button Icon Description 1 MENU Displays the level 1 main menu 2 ESC Takes you back to the previous level 3 Contextual menu For scrolling up the display or moving to the previous item in a button 3 list For accessing the date and time setting If the clock icon flashes it means that the Date Time parameter needs to be set For increasing a numerical value 4 Contextual menu For scrolling down the display or moving to the next item in a list button 2 vi For moving one digit to the left within a numerical value If the digit on the far left is already selected pressing the button loops you back to the digit on the right For moving 1 digit to the right within a numerical value 5 Contextual menu e For validating the selected item button 1 T For executing the manual test For accessing a menu or submenu or for editing a parameter For acknowledging insulation alarms DOCA0049EN 01 06 2013 5
24. 2 Uint16 Month value status Status 0x0000 Data not initialized 0x0001 Data invalid 0x0002 Data valid 0x0003 Power supply loss after this value 0x0004 Injection disable after this value 0x0005 Power supply loss and injection disable after this value 0x04C6 1222 0x04C7 1223 Float32 Year value Reading year values Each reading decrements the counter at address 1205 0x04C8 1224 0x04C9 1225 Uint16 Year value status Status 0x0000 Data not initialized 0x0001 Data invalid 0x0002 Data valid 0x0003 Power supply loss after this value 0x0004 Injection disable after this value 0x0005 Power supply loss and injection disable after this value 72 DOCA0049EN 01 06 2013 Vigilohm IM400 Communication Diagnostic Address Register Number RW Unit Type Range Description hex dec hex dec 0x07D0 2000 0x07D1 2001 W Uinti6 Write OXA456 to start self test 0x07D1 2001 2004 Ox07D2 2002 2005 R Total uptime since first power up 0x07D4 0x07D5 of product Registers correspond to result 01 01 2000 total uptime TI081 date format see page 77 0x07D5 2005 0x07D6 2006 R Uint32 Total number of power cycles since first power up of the product 0x0802 2050 0x0803 2051 W Uinti6 Write Ox1919 to reset fa
25. 400 Schneider Q QZ 2009 W13 1 0001 OOO Display Contextual menu buttons MENU button Red indicator light for Vigilohm IM400 product status Yellow indicator light for Modbus communication indication Green indicator light for correct insulation indication White indicator light for preventive insulation alarm Yellow indicator light for insulation alarm ESC button for returning to previous menu or canceling a parameter entry Vigilohm product catalog number Vigilohm serial number Auxiliary power supply terminal block Injection terminal block Insulation alarm relay terminal block Preventive insulation alarm relay terminal block Modbus RS 485 terminal block Injection inhibition input terminal block 12 DOCA0049EN 01 06 2013 Vigilohm IM400 Presentation Accessories Presentation The following accessories are required depending on the type of installation on which Vigilohm IM400 is installed e a Cardew C surge limiter e a ZX limiting impedance e avoltage adaptor Below is a list of accessories for the Vigilohm devices Accessory Catalog Number 250 V Cardew C surge limiter 50170 440 V Cardew C surge limiter 50171 660 V Cardew C surge limiter 50172 1 000 V Cardew C surge limiter 50183 Cardew C base 50169 ZX limiting impedance 50159 IM400 1700 voltage adaptor IMD IM400 1700 PHT1000 voltage adaptor 50248 1 Compatible with the Vigilohm IM400 wh
26. 7 Vigilohm IM400 Human Machine Interface Information Icons This table describes the icons provided for information in the information area of the LCD display Among other things they indicate which menu is selected or the insulation alarm status Icon Description Main menu e Identifies the system resistance when there is no insulation fault e Measurement parameter menu Insulation fault log menu e sel Trend menu Setting parameter menu Interface language selection menu Product identification Indicates an insulation fault alarm or preventive insulation alarm ee E E 58 DOCA0049EN 01 06 2013 Vigilohm IM400 Human Machine Interface Status Screens Presentation The default screen shows the insulation resistance value of the system This screen is automatically replaced by an alert screen when an insulation alarm occurs The screen backlight flashes to indicate an insulation alarm Each insulation measurement screen displays a status bar at the bottom that provides additional information In general it shows the date and time of the insulation fault g INSULATION 2 RE 21 ka 10 100 tk l k 100k 1M 10M A 12 02 2013 18 30 1 Insulation value 2 Progress bar for the refresh time 3 Bargraph indicating the insulation level on a logarithmic scale The MM symbol indicates the insulation alarm threshold value 4 Status bar display
27. 76 2x 0 51 M12 Mounting e Cardew C mounted directly on busbars e Mounting with plate mounted base Connection MV LV L3 Cardew C A DOCA0049EN 01 06 2013 13 Vigilohm IM400 Presentation ZX Limiting Impedance Function 1500 Qat 50 Hz e 1 500 Qat 50 Hz e 1M Qat 2 5 Hz The ZX remains connected during insulation fault locating at 2 5 Hz The ZX limiting impedance must be used on systems with U lt 500 Vac The ZX limiting impedance creates an installation with an impedance grounded neutral system Dimensions in 4xO8 2 lt 4xO0 32 _ 7 48 15 185 0 59 7 28 14 96 Mounting Connection On mounting plate 14 DOCA0049EN 01 06 2013 Vigilohm IM400 Presentation Voltage Adaptors The optional voltage adaptors are e IM400 1700 e PHT1000 Function The IM400 1700 and PHT1000 voltage adaptors can be used to connect a Vigilohm IM400 to voltage systems higher than 480 Vac L L The wire connecting IM400 1700 to Vigilohm IM400 must have the same voltage rating than the monitored network The compatibility of voltage adaptors with insulation fault location is as follows e The IM400 1700 voltage adaptor is not compatible with insulation fault location e The PHT1000 voltage adaptor is compatible with insulation fault location Dimensions IM400 1700 3 35 PHT1000 mm l 110 4x 7 Moun
28. DOCA0049EN 01 Vigilonm IM400 Insulation Monitoring Device User Manual 06 2013 www schneider electric com Schneider The information provided in this documentation contains general descriptions and or technical character istics of the performance of the products contained herein This documentation is not intended as a substitute for and is not to be used for determining suitability or reliability of these products for specific user applications It is the duty of any such user or integrator to perform the appropriate and complete risk analysis evaluation and testing of the products with respect to the relevant specific application or use thereof Neither Schneider Electric nor any of its affiliates or subsidiaries shall be responsible or liable for misuse of the information contained herein If you have any suggestions for improvements or amendments or have found errors in this publication please notify us No part of this document may be reproduced in any form or by any means electronic or mechanical including photocopying without express written permission of Schneider Electric All pertinent state regional and local safety regulations must be observed when installing and using this product For reasons of safety and to help ensure compliance with documented system data only the manufacturer should perform repairs to components When devices are used for applications with technical safety requirements the relevant inst
29. FF This setting helps avoiding an undesired Disconnected Injection Detected message from appearing when installing and commissioning the device before connecting it to the power system and loads According to the system or application requirements it may be needed to enable the disconnected injection detection parameter setting it to ON when executing the final commissioning Thus the Vigilohm IM400 can continuously perform this checking during operation and report any injection connection or wiring issue HV1 HV2 Wiring Testing The connection between Vigilohm IM400 and the voltage adaptors IM400 1700 or PHT 1000 is key fora correct behavior of IM400 It is recommended to check the wiring of HV1 and HV2 wiring terminals to the voltage adaptor It can be done by connecting a known impedance for example 10 kQ between IM400 1700 wiring terminal 1 and IM400 wiring terminal 3 or between PHT1000 wiring terminal 3 and Vigilohm IM400 wiring terminal 3 Check that Vigilohm IM400 correctly measures For this test do not connect IM400 1700 or PHT 1000 to the monitored power system Protection Password Setting To avoid any unintended operation by not authorized or untrained personnel it is recommended to set the protection password DOCA0049EN 01 06 2013 81 Vigilohm IM400 Commissioning Maintenance and Troubleshooting Maintenance and Troubleshooting Product Status Indicator Light The red product status indicator light indicat
30. IM400 no 1 is 1 highest priority e priority of IM400 no 2 is 2 e priority of IM400 no 3 is 3 e priority of IM400 no 4 is 4 lowest priority e IM400 no 1 with the highest priority is always injecting its injection inhibition input is left unwired e IM400 no 2 with the priority 2 always injection into the system except when there is a closed path between itself and one IMD with a higher priority that is IM400 no 1 in this case The closed path occurs when D2 C1 and D1 are closed Therefore Injection inhibition of IM400 no2 D2 AND C1 AND D1 The representation in Ladder PLC programming language is as follows D2 C1 D1 IM400 no2 A ME AT LI e IM400 no 3 with the priority 3 always injection into the system except when there is a closed path between itself and one IMD with a higher priority that is IM400 no 2 and IM400 no 1 in this case The closed path occurs when e D3 C2 and D2 are closed or e D3 C2 C1 and D1 are closed Therefore e Injection inhibition of IM400 no 3 D3 ANDC2 ANDD2 OR D3 AND C2 AND C1 AND D1 e Injection inhibition of IM400 no 3 D3 AND C2 AND D2 OR C1 AND D1 DOCA0049EN 01 06 2013 51 Vigilohm IM400 Functions The representation in Ladder PLC programming language is as follows D2 C2 D3 ac a e ap D1 C1 gt e IM400 no 4 with the priority 4 always injection into the system except when there is a closed path between itself and one IMD with a higher priority that i
31. Uint16 e 0 Min 15 V Injection voltage e 1 Low 33 V Factory value 2 e 2 Medium 120 V e 3 Max 150 V only with IM400 1700 voltage adaptor OxOBD1 3025 OxOBD2 3026 RW Uint16 e 0O Power Customer application Industry Factory value O e 1 Control Circuits e 2 Photovoltaic OxOBD2 3026 OxOoBD3 3027 RW Uint16 e 0 ON Disconnected injection e 1 OFF detection Factory value 0 OxOBD3 3027 OxOBD4 3028 RW Uint16 e 0 OFF Insulation fault locating e 1 ON Factory value 0 OxOBD5 3029 OxOBD6 3030 RW Uint16 eo O OFF Self test test with relays e 1 ON Factory value 1 OxOBD6 3030 Ox0BD7 3031 RW Q Uint16 e 0 1 500 kQ Grounding resistance for e OxFFFFFFFF impedant IT systems HRG OFF Factory value OxFFFFFFFF disabled 74 DOCA0049EN 01 06 2013 Vigilohm IM400 Communication Log Address Register Number RW Unit Type Range Description hex dec hex dec 0x4E20 20000 0x4E21 20001 R Uint16 1 60 Number of event records 0x4E21 20001 0x4E22 20002 R Uint16 Number of the most recent record 0x4E22 20002 0x4E23 20003 R Record Record 1 0x4E2D 20013 0x4E2E 20014 0x4E2E 20014 0x4E2F 20015 R Record Record 2 0x4E39 20025 0x4E3A 20026 Ox50E6 20710 Ox50E7 20711 R Record Record 60 OX50F 1 20721 Ox50F2 20722 Each event is stored using 2 records e A prima
32. akage capacitance up to 2 000 UF To optimize the measurement performances of Vigilohm IM400 according to the application set the application parameter by selecting Menu Settings Network App Set the App parameter value depending on the type of application on which Vigilohm IM400 is installed Parameter Value Application Power C factory setting Power circuits Control C Control circuits Photovolt Photovoltaic The measurement parameters accessible in the Network menu are automatically preset depending on the set up application e Filtering e Fault Locating e V Adaptor e Frequency e Injection There is no need to configure these parameters in typical conditions The table shows the preset values of the measurement parameters according to the application parameter Preset Values Applications Power C Control C Photovolt Filtering Medium Medium Medium Fault Locating ON ON OFF V Adaptor None None HV1700 Frequency 50 Hz DC DC Injection Std Min Max Filtering Measurement Quality The Filtering parameter is to be set depending on the installation type This parameter is used to smooth out values of insulation measures that always depend on equipment operating on the system Criteria with an impact can be especially e Number of loads e Type of loads e Size of the system affects C e Load switching The Vigilohm IM400 is designed to provide accurate in
33. ameters Address Auto Config Baudrate and Parity Monitored network terminal Ethernet Gateway eee Modbus 28 DOCA0049EN 01 06 2013 Vigilohm IM400 Installation Monitoring the Insulation of an IT Power System with a Vigilohm IM400 Connected to a Communication Network and Insulation Fault Location When the Vigilohm IM400 insulation monitoring device is linked to the supervisor via a Modbus connection the following actions are supported e Display e Product status e Status of the insulation alarm active not active acknowledged and status of the preventive insulation alarm e Details of the last 30 time tagged events e Values for R and C to create tables or curves for monitoring these values over variable periods e Configuring the product remotely all the settings can be accessed remotely except for the Modbus parameters Using the XD308C insulation fault location device in addition with the XLI300 communication interface allows also the supervisor to monitor remotely all the feeders and so to report precisely any insulation fault location The XRM mobile insulation fault locator is used to locate accurately the area where the insulation fault is AN l Ethernet gt Monitored Gateway network is terminal Cie ze j de DOCA0049EN 01 06 2013 29 Vigilohm IM400 Installation 30 DOCA0049EN 01 06 2013 Functions
34. ance KQ in accordance with the following timing diagram Insulation Prev alarm Alarm 1 0 Relay Config State Preventive alarm relay Standard activation 8 Alarm relay activation m O O O Insulation Prev alarm gt INSULATION A PREV ALARM INSULATION ALARM A INSUL ALARM gt INSULATION R 550 ko R 500 o rz 500 D R 500 o R 550 ko Display 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 05 11 2012 09 19 E 07 11 2012 14 08 E 07 11 2012 15 08 K 07 11 2012 18 22 07 11 2012 21 19 1 In this example Insulation Alarm Relay parameter Menu gt Settings I O Config Ins Al Relay is setup in Failsafe mode 0 An insulation decrease is detected on the system The insulation resistance drops below the preventive insulation alarm threshold The preventive insulation alarm relay switches and the preventive insulation alarm indicator light lights up An insulation fault is detected on the system Once T time delay has elapsed Vigilohm IM400 switches to the insulation alarm state The insulation alarm relay switches and the insulation alarm indicator light lights up 3 Press the X button to acknowledge the insulation alarm Both the insulation alarm relay and the preventive insulation alarm relay toggle back to their initial state Depending on t
35. ary contacts of D1 and D2 and Bon 50 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Example of Exclusion with Multiple Incoming Feeders and Couplings For complex configurations where there are multiple incoming feeders and couplings it is required to use a basic Programmable Logic Controller PLC to manage the exclusion of IMD The PLC can have the following characteristics e Number of digital inputs is the number of circuit breakers for incoming feeder and for coupling These inputs can be self powered by the PLC or powered by an external power supply e Number of digital outputs is the number of IMDs 1 These digital outputs can be electromechanical or solid state outputs e Processing cycle is equal to 0 1 s or less Using a basic PLC to manage IMD exclusion allows to e monitor continuously each part of IT power system e have a short response time to detect insulation faults e be compatible with complex power systems with high number of incoming feeders and couplings Incoming feeder 1 Incoming feeder 2 Incoming feeder 3 Incoming feeder 4 a MV LV amp MV LV a MV LV w MV LV Y y y y IM400 IM400 IM400 IM400 no 1 no 2 no 3 no 4 D1 D2 D3 D3 C1 C2 C3 Coupling 1 Coupling 2 Coupling 3 IVA BARA AYALA YAY A NO There are 2 methods to determine the logic driving the injection inhibition input of each IMD Method 1 Give a priority to each IMD using indexes of incoming feeders In this example e priority of
36. ary record for an event this identifier is an odd integer numbering starts at 1 and the number is incremented by 2 for each new event e Inthe case of a secondary record for an event this identifier is equal to the primary record identifier plus 1 DOCA0049EN 01 06 2013 75 Vigilohm IM400 Communication Example of an Event The 2 records below represent an acknowledged at 12 29 Record number 1 insulation alarm that occurred at 12 00 on October 1 2010 and was Address Register Number Unit Type Value Description hex dec hex dec 0x4E22 20002 0x4E23 20003 Uinti6 1 Record number Ox4E23 20003 Ox4E24 20004 Uint64 e 10 Date when insulation alarm occurred e 0 October 1 2010 12 00 e 10 e 1 e 12 e 0 e 0 0x4E27 20007 0x4E28 20008 Uint32 1 Record identifier e 0x40 e Primary record plus secondary e 1000 record e Float32 value insulation resistance e Value of register 1000 register for insulation resistance monitoring Ox4E29 20009 0x4E2A 20010 Ohm Uint64 10000 Insulation resistance value at the time of the insulation alarm 0x4E2D 20013 0x4E2E 20014 Uinti6 1 Secondary record identifier for event Record number 2 Address Register Number Unit Type Value Description hex dec hex dec 0x4E2E 20014 0x4E2F 20015 Uinti6 2 Record number Ox4E2F 20015 0x4E30 20016 Uint64 e 10 Date whe
37. ation fault alarm threshold is not appropriate The preventive insulation fault alarm threshold is not appropriate Check the value of the insulation alarm threshold Modify the insulation alarm threshold if necessary Check the value of the preventive insulation alarm threshold Modify the preventive insulation alarm threshold if necessary You deliberately create an insulation fault but the device does not detect it The resistance value used to simulate the insulation fault is greater than the value of the fault threshold Use a resistance value that is lower than the insulation alarm threshold or modify the insulation alarm threshold The insulation fault is not detected between neutral and ground Start again verifying that you are between neutral and ground The product status indicator light is red and the display shows Disconnected Injection Detected The Vigilohm injection circuit is cut off The power system being small the Vigilohm IM400 interprets the low capacitance and high resistance of the power system as a disconnected injection Check the connection on the injection terminal block wiring terminals 1 and 3 and restart the self test e Disable the function during the commissioning The product status indicator light is red and the display indicates that an error occurred during the self test The Vigilohm injection circuit is cut off Briefly disconnect the auxiliary p
38. ative product state is triggered when the Vigilohm IM400 is inoperative di PRODUCT STATUS INOPERA TIVE PRODUCT OxF400 BE00 i DOCA0049EN 01 06 2013 61 Vigilohm IM400 Human Machine Interface Modifying Parameters Presentation To modify any of the values you must be familiar with how the interface menus are structured and the general navigation principles For more information about how the menus are structured refer to the Vigilohm IM400 menu structure see page 56 To modify the value of a parameter follow either of the 2 methods described below e Select an item value plus unit in a list e Modify a numerical value digit by digit The parameters listed below are the only ones where the numerical value can be modified e date e time e password e Modbus address Selecting the Value in a List To select a value in a list use the wf or contextual menu buttons to scroll through the parameter values until you reach the desired value Then press to confirm the new parameter value Modifying the Numerical Value Saving a Parameter Aborting an Entry The numerical value of a parameter is made up of digits and it is the one on the far right that is selected by default To modify a numerical value use the contextual menu buttons as described below e ar allows you to modify the selected digit e allows you to select the digit to the left of the one that is selected or to loop back to th
39. bility and Reduce Risk of Fire Continuity of service is an essential operational requirement for power systems as it helps protecting people and property The use of ungrounded IT power system is mandatory when power interruption would lead to a hazard for people and equipment It is the case of medical operating theaters and marine applications Ungrounded IT system is recommended when unavailability of power would result in losing production or occur significant downtime costs When the first insulation fault current can lead to a risk of fire or explosion it is recommended to limit the first fault current by using ungrounded systems It is the case in environments such as oil and gas chemical or photovoltaic The IT grounding system is chosen in certain cases because it can help facilitating preventive and corrective maintenance operations The ungrounded IT system helps making continuity of service Even after a first insulation fault has occurred the installation can continue to function without presenting any danger to people or equipment However the faulty circuit must be detected and repaired before a second insulation fault occurs The fact that the IT system can tolerate a first insulation fault means that maintenance operations can be improved planned and carried out in good conditions Monitor Insulation Resistance R Standards IEC 60364 and IEC 61557 8 state that IT systems must be either ungrounded or grounded using a suffic
40. by changing the corresponding parameter To acknowledge the insulation alarm relay parameter select Menu Settings 1 0 Config Setting Setting Range Factory Value Ack Al Relay acknowledgement ON OFF ON insulation alarm relay When the Vigilohm IM400 detects an insulation fault both the preventive insulation alarm relay and the insulation alarm relay are triggered depending on the setup e Acknowledgement of relays set to ON Insulation Prev alarm Alarm MOI 11 10 9 O O O Failsafe P E Aa 9 relay arm 0o 0 0 activation 11 E O O o Standard Failsafe Alarm relay activation Sn 8 7 6 O O o Standard f O O o INSULATION nu A R 500 i V 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M A INSUL ALARM R 550 o Display A 0 100 1k 10k 100k 1M 10M 07 11 2012 21 19 05 11 2012 09 19 HE 07 11 2012 14 08 PZN E 07 11 2012 15 08 Q K 07 11 2012 18 22 3 Insulation fault alarm acknowledgement switches back the relays to their initial position 42 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions e Acknowledgement of relays set to OFF Insulation Prev alarm Alarm Toy 11 10 9 O O O Failsafe 16 OFF Prev alarm 102 relay activation Lt d ON O O Standard Mm i 11 10 9 O O o Alarm relay activation A x R R 500 o V
41. ctory settings default factory settings 0x0803 2051 0x0804 2052 W Uinti6 Write OxFOA1 to reset all logs 0x0804 2052 0x0805 2053 W Uinti6 Write Ox25AB to reset all graphs Settings Address Register Number RW Unit Type Range Description hex dec hex dec Ox0BB7 2999 Ox0BB8 3000 R Uinti6 Total number of settings changed since first power up Incremented by 1 for each change of one or several parameters Ox0BB8 3000 OxOBB9 3001 RW Uint16 e 0 Normally Injection inhibition input open configuration e 1 Normally Factory value O Normally closed open OxOBB9 3001 OxOBBA 3002 RW Uini6 e 1 Standard Insulation alarm relay logic connection command e 2 Failsafe Factory value 2 Failsafe OxOBBA 3002 OxOBBB 3003 RW Ohm Uint32 100 Q 500 ki Insulation alarm threshold Factory value 1 KQ OxOBBC 3004 OxOBBD 3005 RW Ohm Uint32 e 1kQ 1 MQ Preventive insulation alarm e OxFFFFFFFF threshold OFF OFF is used to deactivate the preventive insulation alarm Factory value OXFFFFFFFF Deactivated OxOBBF 3007 Ox0BCO 3008 RW s Uinti6 0 7200 Insulation alarm time delay Factory value 0 OxOBCO 3008 Ox0BC1 3009 RW s Uinti6 e O Short 4s Network filtering e 1 Medium Factory value 1 40 s 40 s e 2 Long 400 s Ox0BC1 3009 OxOBC2 3010 RW Hz Uinti6 e O for DC System frequency system Factory value 50 Hz e 50 e 60 e 400 OxOBC6 3014 Ox0BC7 3015 RW Uinti6 0000 9999 Password Factory value 0000
42. d as follows 1 Use the XRM connected to an XPee current probe on the injection connection wire close to IM400 and calibrate the XRM to 18 2 Use the XRM on the cables to locate the insulation fault When the XRM is reporting 18 it means that the insulation fault is on the cable or the load downstream to the clamp Refer to the Vigilohm Catalog for information about the mobile insulation fault locating devices e XRM locating signal receiver Commercial reference 50278 e Open clamp current probes commercial references 50494 50498 and 50499 DOCA0049EN 01 06 2013 47 Vigilohm IM400 Functions Injection Inhibition Input and Exclusion Management Exclusion The IMD injects several patented combinations of low frequency voltage into the system In a system with several incoming feeders depending on the circuit breaker position there must be no more than 1 IMD injecting into the system This injection exclusion is managed by the inhibition input of Vigilohm IM400 which is connected to the auxiliary contacts of the circuit breakers The injection inhibition input can be configured to use an NO or an NC contact as shown below Contact Type Injection Activated when the Contact is Injection Deactivated when the Contact is NO factory value open closed NC closed open Example of Exclusion with 2 Incoming Feeders Using circuit breakers with Normally Open NO auxiliary contacts Incoming feede
43. designs change from time to time please ask for confirmation of the information given in this publication 06 2013
44. e device before trying to install operate or maintain it The following special messages may appear throughout this documentation or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure The addition of this symbol to a Danger safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death A DANGER f This is the safety alert symbol It is used to alert you to potential DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious injury A WARNING WARNING indicates a potentially hazardous situation which if not avoided can result in death or serious injury A CAUTION CAUTION indicates a potentially hazardous situation which if not avoided can result in minor or moderate injury NOTICE NOTICE is used to address practices not related to physical injury Electrical equipment should be installed operated serviced and maintained only by qualified personnel No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material A qualified person is one who has skills and knowledge related to the construction and operation of electrical equipment and its installation
45. e digit on the right e amp confirms the new parameter value After you have confirmed the modified parameter 1 of the 2 screens appears e If the parameter has been saved correctly the screen displays Saved and then automatically reverts to the previous display e Ifthe parameter has not been saved correctly the screen displays Error and the editing screen remains active lt happens when e a value is deemed to be out of range for example the value is classed as forbidden e there are several interdependent parameters To abort the current parameter entry press the ESC button The screen reverts to the previous display Editing Protected Settings You can set a password to limit access to configuration of Vigilohm IM400 parameters to authorized personnel only When a password has been set the information displayed by the device can be viewed but the parameter values cannot be edited The password is inactive by default When password protection is enabled the default password is 0000 If you want to change the factory value you must enter a 4 digit password from 0000 to 9999 when editing a parameter The procedure for setting a password is the same as editing a numerical value Step Action 1 Navigate to MENU Settings Password 2 Select Modify Password Press TI to edit the new password digit by digit editing starts from the digit furthest to the right Use Ar to increase the value of the digit It w
46. e insulation alarm relay is connected to an external signaling device for example horns or lamps the relays are triggered back to their normal position depending on their setup when the insulation alarm is acknowledged e Corrected insulation fault signal set to ON Insulation Prev alarm Alarm Lv 1 ON O O o Failsafe 44 5 OFF O O O Prev alarm relay activation ti ON O O o Standard hog 4 4 R 5 OFF Alarm relay activation O O Standard AA 8 7 6 O O O Display 100 1k 10k 100k 1M 10M 05 11 2012 09 19 100 1k 10k 100k 1M 10M FE 07 11 2012 14 08 INS ALARM 36005 r 500 J R 550 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M K 07 11 2012 18 22 07 11 2012 21 19 E 07 11 2012 15 08 QA 4 After correcting the insulation fault in the power system the insulation fault alarm relay toggles for 3S 44 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions e Corrected insulation fault signal set to OFF Prev alarm Insulation Alarm FSA 11 10 9 Oo oO o Failsafe P ip a 9 j wan arm a w g activation Load O O O Standard Failsafe Alarm relay activation 00 0 Standard Ta 00 0 A PREV ALARM TR A INSUL ALARM gt INSULATION A gt INSULATION R 990 ka R 500 o SU 500 ap 550 ko Display 100 1k 10k 100k 1M 10M 100 1k 10k 100k 1M 10M
47. e insulation status yellow preventive insulation alarm white insulation status green Modbus communication yellow e e O e product status red Use this setting to select whether to include a 3 second toggle of the preventive insulation alarm relay and insulation alarm relay during a manually launched self test To access the test with relay parameter select Menu Settings VO Config Setting Setting Range Factory Value Test w Relays test with relays ON OFF ON If the self test is successful the following screen appears for 3 seconds 2 AUTOTEST AUTOTEST After that a measurement phase shown by a progress bar at the bottom of the screen appears and then 1 of the status screens automatically appears system insulation resistance measurement or insulation fault alarm If the self test is not successful the product automatically restarts If the problem persists the red product status indicator light lights up and a message is displayed to indicate that the product is inoperative If this happens briefly disconnect the auxiliary power supply of the Vigilohm If the problem persists contact the Schneider Electric Customer Care Center DOCA0049EN 01 06 2013 53 Vigilohm IM400 Functions 54 DOCA0049EN 01 06 2013 Human Machine Interface Presentation The Vigilohm features a sophisticated and intuitive human machine interface HMI with signaling indicator lights a graphic
48. e system insulation returns to a value above the insulation alarm threshold this results in a transient insulation fault DOCA0049EN 01 06 2013 59 Vigilohm IM400 Human Machine Interface Insulation Alarm Acknowledged The following screen appears once the insulation alarm is acknowledged The status bar shows the time when the insulation fault is acknowledged INS ALARM Preventive Insulation Alarm Activated The following screen appears when the preventive insulation alarm is activated Transient Insulation Fault Message The following screen appears in the event of a transient insulation fault di TRANSIENT FAULT oo dk 1k 0k iM 10M F 15 02 2013 09 49 Acknowledge the transient insulation fault by pressing the contextual menu button 60 DOCA0049EN 01 06 2013 Vigilohm IM400 Human Machine Interface Special Status Screens Presentation The special status screens are displayed depending on events that occur during the product life The screens depend on the event type but always trigger the red product status indicator light and the insulation alarm relay is active If the preventive insulation alarm relay is configured in mirror mode it is also triggered and no longer mirrors the insulation alarm relay Over Limit Capacitance Detection The over limit capacitance detection state is triggered when the capacitance of the monitored system becomes too high For details on the V
49. ect positions on the device are observed see page 12 DOCA0049EN 01 06 2013 23 Vigilohm IM400 Installation Mounting on and Dismantling from a Grid Presentation You can install the Vigilohm on a grid using mounting brackets reference 01199 or equivalent The device must not be tilted following installation When mounting the device or dismantling it using clamps you can keep the terminal blocks connected and wired up or you can remove them and keep them to hand For USA and Canada Vigilohm IM400 mounting is to be open type only Mounting To install the Vigilohm on a grid using mounting brackets proceed as follows Step Action 1 Position the mounting brackets on the Vigilohm and tighten the screws and washers as described below tightening torque 1 2 N m 8 85 Ib in 2 J SS SS e AA ll lO es 3 F je HE Hz i ISS l TIA A a AAA Fi 1 Removing To remove the Vigilohm from a grid unscrew the clamps from the grid to release the device 24 DOCA0049EN 01 06 2013 Vigilohm IM400 Installation Connection Connection Diagram The diagram below illustrates how to connect the Vigilohm to a single phase or three phase 3 or 4 wire power system or a DC power system P N U S lt 480 V U lt S 480 V L L 3P N US830VAL L Monitored network A B C D FNQ R 1A lt 600 V Auxiliary power supply Listed fuse LP CC 1A
50. en used with voltage adaptor IM400 1700 or PHT1000 2 Compatible with all Cardew C catalog numbers 3 For power systems with Umax gt 480 Vac Ph Neutral or Umax gt 830 Vac Ph Ph or Umax gt 480 Vdc without insulation fault locator 4 For power systems with Umax gt 480 Vac Ph Neutral or Umax gt 830 Vac Ph Ph or Umax gt 480 Vdc with insulation fault locator NOTE For information regarding automatic and mobile insulation fault locating accessories refer to the relevant section see page 47 Cardew C Surge Limiter Function The Cardew C is used if the insulation monitoring device is connected to the secondary of an MV LV transformer according to the rules and conventions that apply in the various countries It helps protecting the low voltage LV installation against overvoltage hazards It is connected to the transformer secondary The Cardew C can be used on the following systems e U lt 1000 Vac e U lt 300 Vdc Selection Un Nominal Phase to Phase Voltage of AC Ui Arcing Voltage Type of Cardew C table System Not accessible neutral Accessible neutral U 380 V U 220 V 400 V lt Ui lt 750 V 250 V 380 V lt U lt 660 V 220 V lt U 80 V 700 V lt Ui lt 1 100 V 440 V 660 V lt U lt 1 000 V 380 V lt U lt 660 V 1 100 V lt Ui lt 1 600 V 660 V 1 000 V lt U lt 1 560 V 660 V lt U lt 1 000 V 1 600 V lt Ui 2 400 V 1 000 V Dimensions 100 2x 0 28 3 94 2
51. es an error relating to one of the following e interruption of the injection circuit e self test not OK e inoperative product e over limit capacitance C gt 500 UF or C gt 2 000 UF in photovoltaic mode Interruption of the Injection Circuit If the injection circuit of the Vigilohm is interrupted the display shows the message below and starts flashing Self Test DETECTED a PRODUCT STATUS DISCONNECTED INJECTION The Vigilohm performs a series of self tests on start up and then at regular intervals during operation to detect any potential inoperations in its internal and external circuits For more information on the self test function refer to the relevant section see page 53 Troubleshooting The table describes the potential problems and their probable causes It also indicates the checks that can be carried out or provides possible solutions for each scenario If you are still unable to resolve a problem after consulting the table contact your Schneider Electric regional sales representative for assistance Potential Problem The device displays nothing when switched on Probable Cause The device is not being supplied Possible Solution Check the auxiliary supply is present The auxiliary supply does not comply Check the value of the auxiliary voltage U 110 480 Vac The device signals an insulation fault but your system shows no signs of abnormal behavior The insul
52. fault can be done using Vigilohm IM400 with PHT1000 System Frequency This is the rated frequency of the monitored power system 4 settings are available for the Frequency parameter e DC e 50 Hz e 60 Hz e 400 Hz 34 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Injection This is the level of measurement voltage and measurement current that are injected between the monitored power system and ground 4 settings are available for the Injection parameter Parameter Value Example of Use Measurement Voltage Measurement Current Value Value Min Sensitive control circuits lt 15 Vpeak lt 375 pApeak Low Not sensitive control circuits or lt 33 Vpeak lt 825 uApeak power circuits with low values of leakage capacitance Std Power circuit applications with high lt 120 Vpeak lt 3 mApeak values of leakage capacitance Max setting applicable Photovoltaic application lt 120 Vpeak lt 300 uApeak only for Vigilohm IM400 used with IM400 1700 Impedant IT Networks HRG The Vigilohm IM400 can be used to monitor power systems with a grounding resistance inserted between the neutral and the earth If the value of this neutral grounding resistance is entered through the HRG High Resistance Grounding parameter the Vigilohm IM400 compensates the measured insulation resistance It does it with the value of the neutral grounding resistance offsetting it to report the act
53. fields are in CP56Time2a standard and are considered as optional e WD Week Day e f not used set to 0 1 Sunday 2 Monday e Value from 1 7 e SU Summertime e f not used set to 0 0 standard time 1 summertime e Value from 0 1 e iV Validity of the information contained in the structure e f not used set to O 0 valid 1 not valid or not synchronized in system e Value from 0 1 This information is encoded in binary form DOCA0049EN 01 06 2013 TI Vigilohm IM400 Communication 78 DOCA0049EN 01 06 2013 Maintenance and Troubleshooting What Is in This Chapter This chapter contains the following topics Topic Page Safety Precautions 80 Commissioning 81 Maintenance and Troubleshooting 82 DOCA0049EN 01 06 2013 79 Vigilohm IM400 Commissioning Maintenance and Troubleshooting Safety Precautions Safety Precautions The following safety precautions must be thoroughly implemented before commissioning or attempting to repair electrical equipment or carry out maintenance Carefully read and follow the safety precautions described below A A DANGER HAZARD OF ELECTRIC SHOCK ARC FLASH OR BURNS e Wear suitable personal protective equipment and follow the currently applicable electrical safety instructions See for example standard NFPA 70E when carrying out work in the USA e Only qualified personnel should maintain this equipment Such wor
54. he setup of the I Os the preventive insulation alarm relay and the insulation alarm relay may or may not toggle back to their initial states The timing diagram above represents the case when the I Os are set up to acknowledge the relays 4 The insulation fault has been corrected or disappeared Vigilohm IM400 reverts to normal status N When the Vigilohm is in the insulation alarm state that is not acknowledged and the insulation rises again then the insulation fault is transient DOCA0049EN 01 06 2013 37 Vigilohm IM400 Functions Status Information The display and the 5 indicator lights on Vigilohm IM400 indicate the current status of the product Indicator Lights Product Status Modbus Communication Status Insulation Status Preventive Insulation Insulation Alarm Alarm Description Vigilohm IM400 de energized Oo Vigilohm IM400 energized No insulation fault detected SA DQ O Vigilohm IM400 energized OFF OFF ON Preventive insulation alarm detected Q SA SA O Vigilohm IM400 energized OFF D OFF Z OFF ON Insulation fault detected S Ta amp ofr on O on Flashing Flashing Vigilohm IM400 energized No insulation fault detected but transient insulation fault has been detected Vigilohm IM400 energized Preventive insulation alarm detected Transient insulation fault has been detected
55. iently high value impedance resistance or inductance In the event of a first insulation fault the ground fault current is low and interrupting the faulty circuit is unnecessary However given the fact that a second insulation fault could potentially cause the circuit breaker to trip an insulation monitoring device must be installed to indicate a first insulation fault This device must trig an audible or a visual signal By constantly monitoring the insulation resistance you can track the system insulation quality which is an insight for preventive maintenance Monitor the Leakage Rate C According to standard IEC 60364 4 41 the following conditions must apply to provide protection against indirect contact in AC power systems R xa lt 50 V Where e Ri is the resistance value of the grounding connection of the equipment exposed conductive parts e Ja is the ground fault current in A e 50 V is the maximal acceptable voltage for indirect contacts In ungrounded 3 phase AC power systems fault current La is la 20xFxCxV Where e C isthe earth leakage capacitance of the power system e F isthe frequency of the power system e NW isthe phase to neutral voltage Therefore the following condition must apply to provide protection against indirect contacts 27 xP xVxCx Rk SON Thus it is necessary to monitor the earth leakage capacitance C and to have a low resistance value of grounding connections For more information
56. igilohm IM400 limits refer to the product performances In case of detected over limit capacitance the Vigilohm IM400 is no longer able to monitor the IT system Power Circuit or Control Circuit Photovoltaic Circuit di PRODUCT STATUS di PRODUCT STATUS OVER LIMIT CAPACITANCE OVER LIMIT CAPACITANCE C gt 2000uF t 16 03 2013 11 24 Overvoltage The overvoltage state is triggered when the voltage of the monitored system becomes too high For details on the Vigilohm IM400 limits refer to the product performances In case of overvoltage the Vigilohm IM400 is no longer able to monitor the IT system and automatically disconnects of the power system until the product is manually reset by briefly disconnecting the auxiliary power supply di PRODUCT STATUS OVER VOLTAGE E 15 02 2013 09 47 Disconnected Injection Detection The state of disconnected injection is triggered when the Vigilohm IM400 detects that the ground conductor or the injection wire is disconnected In case of disconnected injection detected the Vigilohm IM400 is no longer able to monitor the IT system If the Disconnect Inj parameter in the Ins Alarm menu is set to ON the following screen displays di PRODUCT STATUS DISCONNECTED INJECTION DETECTED t 15 02 2013 09 49 lf the Disconnect Inj parameter is set to OFF the Vigilohm IM400 displays R gt 10 MQ Inoperative Product The inoper
57. ill automatically roll over from 9 to 0 NOTE Keep the ar button pressed down to accelerate scrolling through the values 62 DOCA0049EN 01 06 2013 Vigilohm IM400 Human Machine Interface Step Action li Press ui to move to the next digit Pressing this button on the last digit furthest left loops you back to the first one 5 Repeat steps 3 and 4 for all other digits Press UY to save the new password A message indicates that the password was saved successfully The screen reverts to the previous one 7 Select Activation Press El 8 Change value listto ON by pressing the or 4 arrows Validate the entry by selecting Sa message indicates that the parameter was saved successfully Result The password protection is now active The procedure for entering a password is similar to editing a numerical value Step Action 1 Press the contextual menu navigation keys to navigate to the parameter to edit 2 Press Bl The screen to enter the password is displayed The first furthest left digit is selected and ready to edit Use Ar to increase the value of the digit It will automatically roll over from 9 to O NOTE Keep the ar button pressed down to accelerate scrolling through the values 4 Press 1 gt to move to the next digit Pressing this button on the last digit furthest right loops you back to the first one Repeat steps 3 and 4 for all other digits
58. ils of the 30 most recent insulation fault events that have triggered one of the 2 statuses below e preventive insulation alarm e insulation alarm Event 1 is the one that was recorded most recently and event 30 is the oldest recorded event The oldest event is deleted when a new event occurs Due to the rolling buffer the Vigilohm IM400 may show 28 logs maximum To reset all the events select Settings Reset Reset Logs Using this information the performance of the distribution system can be improved and maintenance work facilitated It is also available through Modbus see page 67 The figure below shows the display elements associated with an insulation fault event G 15 02 2013 09 49 Aa 15 02 2013 09 49 LOGGING 2 p gt Ins Alarm O R 1000 6 Legend Description 1 Insulation fault value recorded 2 Type of insulation fault recorded insulation alarm preventive insulation alarm transient insulation alarm 3 Date and time when the insulation alarm fault preventive insulation alarm or transient insulation fault occurred 4 Date and time when the event disappeared o Ke Insulation alarm acknowledgment o f Disappearance of preventive insulation alarm or transient insulation alarm Number of events displayed Total number of events recorded DOCA0049EN 01 06 2013 65 Vigilohm IM400 Human Machine Interface Trend Screens Presentation Trend
59. ing additional information related to the current insulation alarm state Different types of status bar are available see note below 5 Contextual buttons for navigating the insulation screens or for launching a manual self test NOTE The different types of status bar are e Current date and time displayed when product is in normal operation no insulation fault detected e Insulation alarm active time delay an insulation fault has been measured and the insulation alarm time delay is active This bar shows a progress bar for the time delay e Insulation alarm pickup date and time e Insulation alarm dropout date and time e Insulation alarm relay acknowledgment The bars can also indicate e acyclic self test is running in the background e a first measurement is in progress at startup or after reactivating the injection function System Insulation Resistance Measurement R The Vigilohm displays the insulation resistance measurement for the system by default The status bar shows the current time of the IMD g INSULATION R 21 ka 10 300 dk l k 100k 1M 10M 12 02 2013 18 30 Insulation Alarm Detected Insulation Fault Message The following screen displays when the insulation value drops below the insulation alarm threshold di INS ALARM There are 2 possible scenarios e Acknowledge the insulation alarm by pressing the X contextual menu button e f you do not acknowledge the insulation alarm and th
60. ire So this connection must be broken before carrying out any kind of work on the product A A DANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH e Before carrying out work of any kind disconnect the Vigilohm IM400 from the monitored system by disconnecting wiring terminals 1 2 and 3 of injection terminal block Disconnect all the power supplies running to the Vigilohm and the equipment on which it is installed e Always use a correctly calibrated voltage tester to check that the injection wire and power supply have been properly disconnected Failure to follow these instructions will result in death or serious injury Specific Hazard Associated with IM400 1700 Voltage Adaptor A 44 DANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Connect the ground wiring terminal 4 on the IM400 1700 voltage adaptor to a protective earth ground PE conductor Failure to follow these instructions will result in death or serious injury Other Safety Measures Carefully read through the safety measures described below You are always required to implement them fully before attempting to install repair or service electrical equipment A 44 DANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH e Wear suitable personal protective equipment and follow the currently applicable electrical safety instructions e This equipment may only be installed by qualified electricians who have read all the relevan
61. k should be performed only after reading all the installation instructions e Turn off all power supplying this equipment before working on or inside it e NEVER work alone e Beware of potential hazards and wear personal protective equipment Failure to follow these instructions will result in death or serious injury NOTICE HAZARD OF PRODUCT DAMAGE e Never open the Vigilohm unit e Do not attempt to repair any components in the Vigilohm range either in the unit or an accessory Failure to follow these instructions can result in equipment damage 80 DOCA0049EN 01 06 2013 Vigilohm IM400 Commissioning Maintenance and Troubleshooting Commissioning Validating Correct Insulation Monitoring With Exclusion Management In order to have proper insulation monitoring of the electrical power system it is important that it is monitored by one and only one insulation monitoring device at a time For most of the systems that do not include multiple incomers or coupling of multiple busbars this is easily achieved as there is only one IMD in the system permanently active For systems with multiple incomers or power busbar coupling the monitoring system embeds several Vigilohm IMDs as explained in the Injection Inhibition Input and Exclusion Management section see page 48 The exclusion activation of each IMD according to the electrical power system configuration is managed through the injection inhibit
62. m Insulation Alarm ea 3 ON Failsafe 71 Insulation 86 OFF Alarm Relay Sy Standard 8 Preventive er 83 Insulation Failsafe ae Alarm Relay Prev Ins Alarm 1 10 9 Threshold not Standard OFF 11 10 9 p ti Insulation alarm 4 1 3 reventive relay Alarm Relay in Mirror Insulation alarm 3 mode relay Standard States in which insulation alarm relay is States in which both relays are identical mirrored When the preventive insulation alarm relay is configured in failsafe FS mode e The preventive insulation alarm relay is activated energized in the following cases e No preventive insulation fault is being detected e Insulation fault is being detected and acknowledged Acknowledgement of the insulation alarm relay is activated selecting Menu Settings 1 0 Config Ack Al Relay set to ON e The preventive insulation alarm relay is deactivated de energized in the following cases e Insulation fault is being detected A special insulation status is detected see page 67 The product is inoperative detected by self test The auxiliary power supply is lost When the user triggers a self test with relays selecting Menu Settings VO Config gt Test w Relays set to ON the insulation alarm relay toggles for 3 seconds see page 53 When the preventive insulation alarm relay is configured in standard Std mode e The preventive insulation alarm relay is activated energized
63. n longer than the delays set up To access the time delay parameter select Menu Settings Ins Alarm Setting Setting Range Factory Value Ins Al Delay insulation alarm time 0 120 min Os delay Prev Al Del preventive insulation 0 120 min Os alarm time delay NOTE The preventive insulation alarm time delay setup is not displayed when the preventive insulation alarm threshold value is set to OFF 38 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Detecting Disconnection of Injection Wiring Terminal This function allows the detection of the disconnection of the injection wire or ground wire It also allows the disconnection between Vigilohm IM400 and IM400 1700 or PHT1000 voltage adaptors to be detected This function is based on the detection of a very high insulation in the system To access the parameter select Menu Settings Ins Alarm Setting Setting Range Factory Value Disconnect Inj disconnected ON OFF OFF injection On small networks without loads and IT transformer where the insulation level is very high or during commissioning without loads and without IT transformer it is recommended to set the parameter to OFF Detection of disconnection between Vigilohm IM400 and IM400 1700 or PHT1000 voltage adaptors is always active and does not depend on the value of the Disconnect Inj parameter Insulation Alarm Relay Depending on
64. n insulation alarm e 0 disappeared October e 10 1 2010 12 29 e 1 e 12 e 29 e 0 0x4E33 20019 0x4E34 20020 Uint32 1 Record identifier e 0x10 e Secondary record e 1100 e UintiG6 value insulation alarm acknowledged e Value of register 1100 insulation alarm status register 0x4E35 20021 Ox4E36 20022 Uint64 8 Value of insulation alarm register at the time of insulation alarm acknowledgement Ox4E39 20025 Ox4E3A 20026 Uinti6 2 Secondary record identifier for event 76 DOCA0049EN 01 06 2013 Vigilohm IM400 Communication Date and Time The following structure is used for date time information exchange using Modbus protocol The date time are encoded in 8 bytes as follows b15 b14 b13 b12 b11 b10 b09 b08 b07 b06 b05 b04 b03 b02 b01 b00 Word 0 0 0 0 0 0 0 0 R4 Y Y Y Y Y Y Y Word 1 0 0 0 0 M M M M WD WD WD D D D D D Word 2 SU 0 0 H H H H H iV 0 mn mn mn mn mn mn Word 3 ms ms jms ms ms ms ms ms ms ms ms ms ms ms ms ms Word 4 e R4 Reserved bit reserved by IEC870 5 4 set to 0 e Y Years e 1 byte e Value from 0 127 1 1 2000 to 31 12 2127 e M Months e 1 byte e Value from 1 12 e D Days e 1 byte e Value from 1 31 e H Hours e 1 byte e Value from 0 23 e mn Minutes e 1 byte e Value from 0 59 e ms Milliseconds e 2 byte e Value from 0 59999 The following
65. of wires must be suitable to the load current and to the voltage to which it is connected The following characteristics need to be considered e auxiliary power supply consumption 25 VA 10 W e current flowing to the monitoring network wiring terminal less than 20 mA e current flowing to the injection inhibition wiring terminal 5 mA e current flowing to the insulation alarm and to the insulation preventive alarm wiring terminals depends on the power rating of the alarm indicator DOCA0049EN 01 06 2013 25 Vigilohm IM400 Installation Typical Applications Presentation The following section presents 5 insulation monitoring applications for an IT power system e 1 application with a standalone Vigilohm IM400 e 1 application with Vigilohm IM400 where the insulation alarm and preventive insulation alarm outputs are sent to a Supervisor e 1 application with Vigilohm IM400 where the insulation alarm and preventive insulation alarm outputs are sent to a supervisor and locating the insulation fault is done using an XD301 or XD312 automatic fault locator and an XRM mobile fault locator e 1 application with a Vigilohm IM400 connected to a communication network e 1 application with a Vigilohm IM400 connected to a communication network and locating the insulation fault is done using an XD308C insulation fault locator Monitoring the Insulation of an IT Power System with a Standalone Vigilohm IM400 An IT power system is a system invol
66. ohm proceed as follows Step Action 1 Insert the Vigilohm in the cut out in the mounting plate by tilting the device forward slightly 2 Depending on the thickness of the mounting plate clip the spring clips into the mounting slots on the device as described below First clip the spring clip at the top If the mounting plate thickness X is The mounting slot to be used is 0 8 mm X 2 mm 0 03 in X lt 0 08 in If the mounting plate thickness X is The mounting slot to be used is 2 mm lt X s3 2 mm 0 08 in X 0 12 in DOCA0049EN 01 06 2013 21 Vigilohm IM400 Installation Step Action 3 Clip the 2 spring clips on the device sides then the 2 spring clips at the device bottom 4 Wire up and insert the terminal blocks as shown in the relevant wiring diagram see page 25 22 DOCA0049EN 01 06 2013 Vigilohm IM400 Installation Removing To remove the Vigilohm from a mounting plate proceed as follows Step Action 1 Disconnect the terminal blocks from the Vigilohm 2 Deal with each of the spring clips as follows insert the blade of a screwdriver between the spring clip and the device Then use the screwdriver as a lever to release the spring clip Start releasing the spring clips at the top and bottom of the device 3 4 Remove the Vigilohm from the plate 5 Reinsert the terminal blocks making sure that the corr
67. ower supply for the Vigilohm Although the Vigilohm is being supplied with power the product status indicator light does not light up Inoperative indicator light Restart the self test and check that the product status indicator light lights up briefly The insulation alarm indicator light does not light up in the event of an insulation fault Inoperative indicator light Restart the self test and check that the insulation alarm indicator light lights up briefly 82 DOCA0049EN 01 06 2013 Specifications Specifications Type of Installation to Be Monitored Characteristic AC or mixed AC DC IT systems with IM400 connected to neutral Values Phase to phase voltage 830 Vac or 1 700 Vac With IM400 connected to phase lt A80 Vac 2 or 1 000 Vac Frequency 45 440 Hz DC or rectified systems Line voltage lt 480 Vdc Y or 1 200 Vdc 94 1 When the insulation monitor is linked to a non insulated inverter it is necessary to take into account the DC voltage limit rather than the AC limit 2 IM400 directly connected to the power system 3 IM400 used with IM400 1700 or PHT1000 subassemblies 4 1000 Vdc with IM400 1700 and 1200 Vdc with PHT 1000 Electrical Characteristics Characteristic Values Range for insulation resistance readings 10 Q 10 MQ Range for capacitance readings 0 1 500 uF 2 000 uF for PV a
68. pplications Insulation fault signaling Number of thresholds 2 protected password Threshold settings Insulation alarm 0 1 500 kQ Preventive 1kQ 1 MQ insulation alarm Time delay for signaling 0 7 200 s Dielectric strength 4000 Vac 5500 Vdc 7 3 kV impulse Auxiliary supply voltage 50 60 400 Hz 100 440 Vac DC 100 440 Vdc Auxiliary supply voltage tolerances 15 Monitored system voltage IM400 directly connected 5 tolerances IM400 used with IM400 1700 15 25 VA 10 W Maximum device consumption Measurement voltage Variable 15 Vp 33 Vp 120 Vp Measurement current Variable 375 pAp 825 uAp 3 mAp Fault locating current 3 75 mAp Extraneous DC voltage Ufg 506 V Device operating test Self test manual test Internal impedance At 50 60 400 Hz 40 kQ Internal resistance Ri of the measuring circuit 40 kQ DOCA0049EN 01 06 2013 83 Vigilohm IM400 Specifications Characteristic Values Output contact Quantity 2 standard and failsafe Type of contact SPDT one changeover contact Operating principle N O N C operation Electrical endurance 30 000 cycles Breaking capacity 250 Vac 3A 48 Vdc 1 A 10 mA minimum load Injection inhibition voltage supplied by IM400 Voltage 24 Vdc Current 5 mA Installation category 300 V OVC III degree of pollution 2 600 V OVC II degree of poll
69. quest is as follows Number Type Value 0 VendorName Schneider Electric 1 ProductCode IM400 2 MajorMinorRevision VX Y Z 3 VendorURL www schneider electric com 4 ProductName Insulation Monitoring Device 5 ModelName IMD IM400 The product answers any types of requests basic regular extended DOCA0049EN 01 06 2013 69 Vigilohm IM400 Communication Modbus Registers Tables Table Format Modbus register tables have the following columns Address Register Number RW Unit Type Range Description hex dec hex dec System Status e Register Address Address of register encoded in the Modbus frame in hexadecimal hex and decimal dec formats e Register Number corresponds to the Register Address 1 in hexadecimal hex and decimal dec formats RW Whether the register is read only R or read write RW Unit The unit the information is expressed in Type The encoding data type Range The permitted values for this variable usually a subset of what the format allows Description Provides information about the register and the values that apply Address Register Number RW Unit Type Range Description hex dec hex dec 0x0064 100 0x0065 101 R Uint16 e 17000 IM10 Device identifier e 17001 IM10H e 17002 IM20 e 17003 IM20H e 17004 IM400 Ox0066 102 103 0x0067
70. r 1 Incoming feeder 2 S MV LV S MV LV IM400 IM400 no 1 inhibit Input NO i no 2 Inhibit Input NO Injection Inhibition Input Injection Inhibition Input IS D1 Auxiliary Contact NO D2 Auxiliary Contact NO YY AA Using circuit breakers with Normally Closed NC auxiliary contacts Incoming feeder 1 Incoming feeder 2 S MV LV S MV LV IM400 IM400 NO 1 inhibit Input NO i no 2 Inhibit Input NC Injection Inhibition Input Injection Inhibition Input D1 771 Auxiliary Contact NC D2N If Then e D1isclosedand The 2 Vigilohm IM400 devices are active e D2isopen e Vigilohm IM400 no 1 monitors the system insulation e Vigilohm IM400 no 2 only monitors the insulation of the transformer 2 connection as far as D2 e D1 is open and The 2 Vigilohm IM400 devices are active e D2 is closed Vigilohm IM400 no 1 monitors the insulation of the transformer 1 connection as far as D1 Vigilohm IM400 no 2 monitors the system insulation e e D1 is closed and e Vigilohm IM400 no 1 monitors the system insulation e D2 is closed e Vigilohm IM400 no 2 must be inhibited 48 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Example of Exclusion with 2 Incoming Feeders and 1 Coupling Using circuit breakers with Incoming feeder 1 a MV LV gt w IM400 no 1 Injection Inhibition Input Normally Open NO auxiliary contacts Incoming feeder 2 a MV LV gt Y
71. r IMD device by managing exclusions using the injection inhibition input see page 48 Using the preventive insulation alarm relay configured in mirror mode the relays can be wired in series creating a logical AND function It is recommended to configure the insulation alarm relay in failsafe mode and wire both relays in failsafe mode as well NC C In this case the logical function returns true only when the device is inoperative or de energized or when a special status is active The wiring diagram shows how to wire the Vigilohm IM400 in Mirror mode Modbus RS 485 15 14 13 12 A Preventive insulation alarm B Insulation alarm Mode PLC Input IM400 State No fault Preventive alarm Alarm Inoperative product IM400 de energized Failsafe 1 1 1 0 0 Failsafe 2 0 0 1 1 1 DOCA0049EN 01 06 2013 41 Vigilohm IM400 Functions Insulation Alarm Relay Acknowledgement When the relays are connected to loads for example horns or lamps it is recommended to turn off these external signaling devices before the insulation level rises back to a level above the setup thresholds This can be done by clicking the acknowledge button while in insulation alarm state In certain system configurations it is required to prevent this type of user acknowledgement and only retrigger the relays when the insulation level rises above the setup thresholds This is done
72. ric test Hi Pot or a Megger test disconnect the Vigilohm input and output wires Failure to follow these instructions can result in equipment damage DOCA0049EN 01 06 2013 19 Vigilohm IM400 Installation Dimensions Vigilohm IM400 Dimensions 4 84 4 CAUTION CUTTING HAZARD Trim the edges of the cut out plates to remove any jagged edges Failure to follow these instructions can result in injury or equipment damage Constraints for Flush Mounting Observe the correct distances between devices mm in 40 1 57 40 1 57 20 DOCA0049EN 01 06 2013 Vigilohm IM400 Installation Flush Mounting and Dismantling Presentation Vigilohm IM400 can be attached to any flat rigid vertical support using the spring clips supplied The device must not be tilted following installation To free up useful space for control gear you can attach the Vigilohm to the front panel of the floor standing or wall mounted enclosure For USA and Canada Vigilohm IM400 mounting is to be open type only Installing Before attaching the Vigilohm check the following e The mounting plate must have a thickness of between 0 8 mm 0 03 in and 3 2 mm 0 12 in e Arectangle measuring 148 x 112 mm 5 83 x 4 41 in must be cut out from the plate so the device can be installed e No terminal blocks are connected to the unit To install the Vigil
73. ructions must be followed Failure to use Schneider Electric software or approved software with our hardware products may result in injury harm or improper operating results Failure to observe this information can result in injury or equipment damage 2013 Schneider Electric All rights reserved DOCA0049EN 01 06 2013 Table of Contents Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Safety Information wi iv eu Sa pios ok ta a a tase sd eaw cee seek aes ADOUL TIC BOOK ka Sm u a chee eas wie Gia ao aa ets eee iaa Presentation caia ad a e a N a ETOSET TA NON 6 4058 ra id aired aa da da ad eee aoe go d Physical DOSCMOUON zur Meee ad es dee A eee dace ha See Bee FICC OS SOMO Sur cuida Care Dies ate Ces Sethe ee prados rotas CAE edie tarado A IYSTANAUON w wi kok a Soe Sale etre Sas Se DAV Mea SUES iss thre anna a Bares Oe orale ma en a ne dan a Ree eee DIMENSIONS sita ia an Flush Mounting and Dismantling ese sea eee Mounting on and Dismantling from a GriA eee es ern COMECON stored aaa iV piCal ADDICAONS casas a A Aare EURCHUONS 22 ee canta oe Rand O Measurement 2 2 22 22 orar rad iaa A ese Configuration and Accuracy Zones by Application seessoessenssn Monitoring the System Insulation let e nen nn n aa won n n non nn won n n won Operation on Systems with a Voltage Greater Than 480 Vac dC
74. ry record which is created when the insulation alarm or preventive insulation alarm occurs This contains the insulation value e A secondary record which is created when the insulation alarm or preventive insulation alarm disappears This contains the type of event acknowledged insulation alarm transient insulation alarm preventive insulation alarm The 2 records are logged consecutively Description of an Event Record in the Log Register Unit Type Range Description Word 1 Uint16 1 65535 Event record number Word 2 Uint64 Time tagging of event using the same code as for Word 3 the product date time Word 4 Word 5 Word 6 Uint32 e 0 1 Record identifier Word 7 e 0x40 0x10 e Word 6 most significant byte Information for e 1000 1100 primary secondary record This field assumes a value of 1 for the primary record and a value of O for the secondary record e Word 6 least significant byte Type of data stored in the Value field e Word 7 Address of the Modbus register that is the source of the data in the Value field Word 8 Uint64 Depending on the type of record primary or Word 9 secondary Word 10 e Insulation resistance value in ohms at the time Word 11 of the event occurrence encoded in Float32 in the last 2 registers e Insulation alarm type encoded in Uint16 in the last register Word 12 Uint16 1 65534 Primary secondary record identifier for event e Inthe case of a prim
75. s IM400 no 3 IM400 no 2 and IM400 no 1 in this case The closed path occurs when e D4 C3 and D3 are closed or e D4 C3 C2 and D2 are closed or e D4 C3 C2 C1 and D1 are closed Therefore e Injection inhibition of IM400 no 4 D4 AND C3 AND D3 OR D4 AND C3 AND C2 AND D2 OR D4 AND C3 AND C2 AND C1 AND D1 e Injection inhibition of IM400 no 3 D4 AND C3 AND D3 OR C2 AND D2 OR C2 AND C1 AND D1 The representation in Ladder PLC programming language is as follows D1 Gi C2 C3 D4 IM400 no 4 D2 C2 D3 a Method 2 Use a truth table Possible Configurations 1 Injection Inhibition D1 D2 D3 D4 C1 C2 C3 IM400 IM400 IM400 IM400 no 1 no 2 no 3 no 4 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 1 gi 00 o 00 0 1 1 1 1 0 1 or 02 pl 103 1 1 1 1 0 0 0 00 08 09 02 1 1 1 1 y 4 4 02 4 3 4 3 4 3 1 Vigilohm IM400 monitors the transformer 2 Vigilohm IM400 injects a signal into the system 3 Vigilohm IM400 is excluded from the system injection inhibited Injection Inhibition Screen When the injection inhibition function of Vigilohm IM400 is activated that is Inhibit Input set to N O the screen below appears and replaces any system status screen that may be showing already insulation measurement insulation alarm or preventive ins
76. see Cahier technique n 178 Functions of Vigilohm IM400 Insulation Monitoring Device Vigilohm IM400 is a digital insulation monitoring device IMD for low voltage IT power systems with ungrounded neutral Vigilohm IM400 can be used to monitor the insulation of a system and to signal insulation faults Vigilohm IM400 applies several patented combinations of a low frequency AC voltage between the system and ground to provide accurate insulation monitoring in complex applications The insulation is then assessed based on the current value returned This method is used for all types of systems AC DC mixed with rectifiers with variable speed drives with inverters and so on 10 DOCA0049EN 01 06 2013 Vigilohm IM400 Presentation Vigilohm IM400 offers the following functions Insulation resistance display R Detection of insulation faults in accordance with a configurable threshold Display of earth leakage capacitance C and associated impedance Zc Communication via the Modbus RS 485 protocol Injection inhibition via logic input Insulation fault log Trending of the insulation resistance R from last hour to last year Quick setup of the monitoring parameters according to the applications Compatibility with voltage adaptors Umax 1 700 Vac Ph Ph or Umax 1 200 Vdc DOCA0049EN 01 06 2013 11 Vigilohm IM400 Presentation Physical Description Physical Description BO DOZZSTA IONTMONOU gt D IMD IM
77. sulation alarm relay is activated energized in the following cases e The insulation fault is being detected e A special insulation status is detected see page 61 e The product is inoperative detected by self test e Corrected insulation fault signal the insulation fault relay toggles for 3 seconds when an insulation fault has been detected acknowledged and later corrected in the power system see page 44 e When the user triggers a self test with relays Selecting Menu Settings 1 0 Config gt Test w Relays set to ON the insulation alarm relay toggles for 3 seconds see page 53 e The insulation alarm relay is deactivated de energized in the following cases e No insulation fault is being detected e Insulation fault is being detected and acknowledged Acknowledgement of the insulation alarm relay is activated selecting Menu Settings 1 0 Config Ack Al Relay set to ON e The auxiliary power supply is lost DOCA0049EN 01 06 2013 39 Vigilohm IM400 Functions Preventive Insulation Alarm Relay To access the preventive insulation alarm relay parameter select Menu Settings VO Config Setting Setting Range Factory Value Prev Al Relay preventive insulation Std FS Mirror FS alarm relay ENERGIZED PRODUCT Normal Operation Preventive Insulation Inoperative Special BEE En orm i reventiv ulati perativ ci PRODUCT I O Config Relay State No Insulation Fault Alar
78. sulation resistance and capacitance measurement on highly disturbed systems with power electronic devices However to avoid effects such as display fluctuation or undesired transient insulation or preventive insulation alarm a filtering function is embedded to improve the measurement stability The response time associated with this filtering function does not create any problems within the context of IT power system DOCA0049EN 01 06 2013 33 Vigilohm IM400 Functions 3 settings are available for the Filtering parameter Parameter Value Example of Use Measurement Response Time Required Refresh Time to Detect an Insulation Fault for C 1 pF Short Recommended in maintenance mode 0 8 s not 1 s not available in Diagnose fast variation of the insulation available in photovoltaic application resistance and leakage capacitance Mostly photovoltaic used in the following cases application e Detecting short time transient insulation faults e When manually locating insulation faults by opening circuit breakers Medium Recommended in operation mode 8s 40s Dedicated to monitor insulation of typical installations Long Recommended in operation mode 80 s 400 s Dedicated to monitor insulation of highly disturbed installations and or installations with high leakage capacitance Locating Insulation Faults The Vigilohm IM400 can be used with XD301 XD312 or XD308C automatic insulation fault locator or
79. t information e NEVER work alone e Before performing visual inspections tests or maintenance on this equipment disconnect all sources of electric power Assume that all circuits are live until they have been completely de energized tested and tagged Pay particular attention to the design of the power system Consider all power supply sources particularly the potential for backfeed e Before closing protective covers and doors carefully inspect the work area to ensure that no tools or objects have been left inside the equipment e Take care when removing or replacing panels Take special care to ensure that they do not come into contact with live busbars To minimize the risk of injuries do not tamper with the panels e The successful operation of this equipment depends upon proper handling installation and operation Failure to follow basic installation procedures can lead to personal injury as well as damage to electrical equipment or other property e NEVER shunt an external fuse circuit breaker e The Vigilohm must be installed in a suitable electrical cabinet Failure to follow these instructions will result in death or serious injury 18 DOCA0049EN 01 06 2013 Vigilohm IM400 Installation A dielectric test Hi Pot or a Megger test on a device installed in the power system monitored by the Vigilohm IM400 can damage the Vigilohm IM400 NOTICE HAZARD OF PRODUCT DAMAGE Before performing a dielect
80. tance When injection is inhibited the value NaN Not a Number OxFFCOOOOO is returned during self test OxXO3FO 1008 0x03F1 1009 R Uinti6 e O Injection Injection status activated e 1 Injection deactivated Insulation Alarm Status Address Register Number RW Unit Type Range Description hex dec hex dec 0x044C 1100 0x044D 1101 R Uint16 e Q No Insulation alarm status insulation alarm e 1 Insulation alarm active e 2 Preventive insulation alarm active e 4 Transient insulation alarm e 8 Insulation alarm acknowledged Trending Data Address Register Number RW Unit Type Range Description hex dec hex dec Ox04BO 1200 Ox04B1 1201 R Uint16 Hour trending Number of new records in trending buffer not yet read by the Modbus master 0x04B1 1201 Ox04B2 1202 R Uint16 Day trending Number of new recoras in trending buffer not yet read by the master Ox04B2 1202 Ox04B3 1203 R Uinti6 Week trending Number of new records in trending buffer not yet read by the master Ox04B3 1203 Ox04B4 1204 R Uint16 Month trending Number of new records in trending buffer not yet read by the master 0x04B4 1204 Ox04B5 1205 R Uinti6 Year trending Number of new records in trending buffer not yet read by the master Ox04BA 1210 Ox04BB 1211 R Float32 Hour value Reading hour values Each reading decrements the counter at address 1200 0x04BC 1212 Ox04BD 1213 R Uint16 Hour value status Status e 0x0000 Data not initialized e 0x0
81. the status of the insulation the insulation alarm relay is activated or deactivated according to the mode selected e failsafe factory setting e standard To access the insulation alarm relay parameter select Menu Settings VO Config Setting Setting Range Factory Value Ins Al Relay insulation alarm relay FS STD FS When the insulation alarm relay is configured in failsafe FS mode e The insulation alarm relay is activated that is energized in the following cases e No insulation fault is being detected e Insulation fault is being detected and acknowledged Acknowledgement of the insulation alarm relay is activated selecting Menu Settings VO Config Ack Al Relay set to ON e The insulation alarm relay is deactivated that is de energized in the following cases e Insulation fault is being detected A special insulation status is detected see page 67 The product is inoperative detected by self test The auxiliary power supply is lost Corrected insulation fault signal the insulation fault relay toggles for 3 seconds when an insulation fault has been detected acknowledged and later corrected in the power system see page 44 e When the user triggers a self test with relays Selecting Menu Settings 1 0 Config gt Test w Relays set to ON the insulation alarm relay toggles for 3 seconds see page 53 When the insulation alarm relay is configured in standard Std mode e The in
82. ting On DIN rail On mounting plate Connection Monitored network 480 V US 1000 Va L L 830 V lt U lt 1700 Va L L 2 480 V lt U 1000 V 1 Voltage adaptor connected to a phase 2 Voltage adaptor connected to neutral Monitored network 480 V lt U lt S 1000 Vu L L 830 VR lt US 1700 Va L L 480 V lt U 1200 V 1 Voltage adaptor connected to a phase 2 Voltage adaptor connected to neutral S3 Subassembly Retrofit Insulation alarm thresholds of the Vigilohm IM400 must be set higher than 2 kQ to take into account internal impedance of S3 subassembly DOCA0049EN 01 06 2013 15 Vigilohm IM400 Presentation 16 DOCA0049EN 01 06 2013 Installation What Is in This Chapter This chapter contains the following topics Topic Page Safety Measures 18 Dimensions 20 Flush Mounting and Dismantling 21 Mounting on and Dismantling from a Grid 24 Connection 25 Typical Applications 26 DOCA0049EN 01 06 2013 17 Vigilohm IM400 Installation Safety Measures Specific Hazard Associated with Insulation Monitoring Devices IMDs In the case of almost all electric and electronic devices the device power supply is the root cause of electrical hazards The hazard can be mostly reduced by disconnecting the power supply This is not the case with insulation monitoring devices which are connected to the system via the injection w
83. tronics speed drives motor starters inverters Thyristors and DC components The Vigilohm IM400 allows automatic and manual fault location Related Documents Title of Documentation Reference Number Instruction Sheet Vigilohm IM400 Insulation Monitoring Device S1B90076 The IT earthing system a solution to improve industrial electrical network availability PLSED110006EN Application guide Systeme de liaison a la terre IT Une solution pour am liorer la disponibilit des r seaux PLSED110006FR lectriques dans l industrie Guide d application System earthings in LV Cahier technique n 172 Les sch mas des liaisons a la terre en BT r gimes du neutre The IT system earthing unearthed neutral in LV Cahier technique n 178 Le sch ma IT a neutre isol des liaisons a la terre en BT You can download these technical publications and other technical information from our website at www schneider electric com User Comments We welcome your comments about this document You can reach us by e mail at techcomm O schneider electric com DOCA0049EN 01 06 2013 7 DOCA0049EN 01 06 2013 Presentation What Is in This Chapter This chapter contains the following topics Topic Page Presentation 10 Physical Description 12 Accessories 13 DOCA0049EN 01 06 2013 Vigilohm IM400 Presentation Presentation Using Ungrounded IT System to Improve Power Availa
84. ual insulation resistance In this case the actual insulation resistance offset of the neutral grounding resistance is used against the insulation alarm threshold and the preventive insulation alarm threshold to trigger the insulation and preventive insulation alarm relays HRG compensation is applicable only if the neutral is connected to ground through a resistance HRG is not compatible with RLC non linear grounding circuits 2 settings are available for the HRG parameter Parameter Value Description OFF The Vigilohm IM400 does not compensate the reported insulation resistance with the value of the neutral grounding resistance 0 1 500 kQ The Vigilohm IM400 compensates the measured insulation resistance with the value of the neutral grounding resistance DOCA0049EN 01 06 2013 35 Vigilohm IM400 Functions Accuracy by Application The graphs illustrate the accuracy zones for Vigilohm IM400 depending on the application e Typical performance characteristics for power circuit application parameter App set to Power C Relative Error of Insulation Resistance Measurement over Leakage Capacitance Maximum Configurable Insulation Alarm Threshold as a Function of Leakage Capacitance 14 C 500uF C 50yuF 12 o x 8 6 Accuracy of R 4 2 C 0uF 102 1002 1kQ 10kQ 100kQ 1MQ 10MQ Insulation Resistance Q o 200kQ 160kQ
85. ulation alarm di PRODUCT STATUS INJEC TION DISABLED E 15 02 2013 09 32 You can perform the following actions on this screen e Press the MENU button to access the main menu e Press the arrow contextual menu buttons to view the setting screen e Press the Ir contextual menu button to launch the self test NOTE When activating injection again that is Inhibit Input set to N C a self test is launched automatically before returning to the default insulation monitoring screen 52 DOCA0049EN 01 06 2013 Vigilohm IM400 Functions Self Test Description The Vigilohm has a self test function for testing e the product indicator lights internal electronics e the measurement system and the insulation alarm and preventive insulation alarm relays Running the Self Test The test can be run runs e Manually at any time by pressing the Ir contextual menu button on one of the system insulation monitoring screens e Automatically e Whenever the device starts up power up or reset e Every 5 hours except when the device is in the insulation alarm status regardless of whether the insulation alarm is active or has been acknowledged e Whenever leaving the inhibited injection state Inhibit Input when injection is activated again Sequence of Indicator Lights Test with Relays Self Test OK Self Test Not OK During the verification sequence the indicator lights light up in the following order
86. ulation alarm outputs are connected to an available input on a networked device a PLC for example This device is itself connected to a Supervisor via a communication network Locating the insulation fault is done using XD301 or XD312 devices The XD301 or XD312 output relay is connected to an available input on a networked device The XRM mobile insulation fault locator is used to locate accurately the area where the insulation fault is As far as this architecture is concerned the restriction is that only the insulation fault information and group of faulty feeder are available at supervisor level O Monitored PLC CT network terminal Insulation alarm terminal Insulation alarm A terminal UE DOCA0049EN 01 06 2013 27 Vigilohm IM400 Installation Monitoring the Insulation of an IT Power System with a Vigilohm IM400 Connected to a Communication Network When the Vigilohm IM400 insulation monitoring device is linked to the supervisor via a Modbus connection the following actions are supported e Display e Product status e Status of the insulation alarm active not active acknowledged and status of the preventive insulation alarm e Details of the last 30 time tagged events e Values for R and C to create tables or curves for monitoring these values over variable periods e Configuring the product remotely all the settings can be accessed remotely except for the Modbus par
87. ution 2 Electrical Characteristics of IM400 1700 Voltage Adaptor Characteristic Value Dielectric strength 15 4 kV impulse Mechanical Characteristics Other Characteristics Measurement current Variable 30 uAp 60 uAp 220 uAp Extraneous DC voltage Ufg 1 150 Vdc Internal impedance At 50 60 400 Hz 430 kQ Internal resistance Ri of the measuring circuit 430 kQ Characteristic Value Weight 0 75 kg Thermoplastic case Mounting Flush mount or on grid Degree of protection Front IP54 Back IP20 Characteristic Value Temperature range For operation 25 55 C 65 C For storage 40 70 C Climatic conditions IEC 60068 Use Indoors Altitude Up to 3000 m Degree of pollution 2 Overvoltage category 300 V OVCIII 600 V OVCII Standards Product IEC 61557 8 Safety IEC 61010 1 UL 508 C22 2 no 14 05 Installation IEC 60364 4 41 Output contact IEC 61810 2 1 With IM400 1700 voltage adaptor and 230 V 15 auxiliary supply 2 Suitable for use in all climates e Damp heat equipment not operating IEC 60068 2 30 e Damp heat equipment operating IEC 60068 2 56 e Salt mist IEC 60068 2 52 DOCA0049EN 01 06 2013 DOCA0049EN 01 Schneider Electric Industries SAS 35 rue Joseph Monier CS30323 F 92506 Rueil Malmaison Cedex www schneider electric com As standards specifications and
88. ving the use of a transformer whose neutral is not grounded The insulation is monitored by one Vigilohm IM400 with the following characteristics e IM400 is powered by the system that it monitors e IM400 is connected to neutral or to one phase and ground e The insulation fault threshold level is the only IM400 setting to be set up The preventive insulation alarm can be set up e Vigilohm IM400 has a single relay output to a light or alarm sound Monitored network terminal Insulation alarm NY Monitoring the Insulation of an IT Power System with a Vigilohm IM400 Where the Insulation Alarm Is Sent to a Supervisor The insulation is monitored by a Vigilohm IM400 whose insulation alarm and preventive insulation alarm outputs are connected to an available input on a networked device a PLC for example This device is itself connected to a supervisor via a communication network As far as this architecture is concerned the restriction is that only the insulation fault and preventive insulation alarm information is available at supervisor level Monitored network terminal Insulation alarm terminal 26 DOCA0049EN 01 06 2013 Vigilohm IM400 Installation Monitoring the Insulation of an IT Power System with a Vigilohm IM400 and Insulation Fault Location Where the Insulation Alarm Is Sent to a Supervisor The insulation is monitored by a Vigilohm IM400 whose insulation alarm and preventive ins

Vigilohm IM400 - Insulation Monitoring Device

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