Vigilohm IM10, Vigilohm IM20 - Insulation Monitoring Device
Contents
1. 37 Navigating the Interface L m RR n 38 Status SCreens coria SACHE a BN pour Ar M RR eae aiU Dad 40 Modifying Parameters I een een 41 Glock Vigilohim IM20 32 2 20 RR ERE EE ux ee OR na 42 Insulation Fault Log Vigilohm IM20 sssseeee BM 43 Chapter 5 Communication via Modbus RS 485 Vigilohm IM20 45 Configuration of the RS 485 Communication Port 46 Table of Modbus Functions 222222 een n 47 Modbus Registers Table 48 Chapter 6 Maintenance and Troubleshooting 53 Maintenance and Troubleshooting 2222er seen rh 53 Chapter 7 Specliicalloni Brei 55 Specifications aa rt dd 55 VIGED310022EN 09 2011 3 VIGED310022EN 09 2011 Safety Information c Important Information NOTICE PLEASE NOTE Read these instructions carefully and look at the equipment to become familiar with the 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 Obey2. VIGED310022EN 09 2011 39 Vigilohm IM10 IM20 Human Machine Interface Status Screens Presentation The default screen is the one that shows the system s insulation resistance value It is automatically replaced by an alert screen when an insulating fault occurs The screens for indicating an insulating fault flash System Insulation Resistance Measurement R The Vigilohm displays the insulation resistance measurement for the system by default X INSULATION R 500 ko L 100 1k 10k 100k 1M 10M Alarm detected Insulation Fault Message The following screen is displayed when the insulation value drops below the alarm threshold INSULATION FAULT R 0 5 kQ There are 2 possible scenarios e Acknowledge the alarm by pressing the IK contextual menu button e If you do not acknowledge the alarm and the system s insulation returns to a value above the alarm threshold this results in a transient fault Alarm Acknowledged The following screen appears once the alarm is acknowledged A ALARM R 0 5 100 1k 10k 100k 1M 10M Pre alarm Activated The following screen appears when the pre alarm is activated N PRE ALARM R 0 5 l 100 1k 10k 100k 1M 10M Transient Fault Message The following screen appears in the event of a transient fault TRANSIENT FAULT Acknowledge the transient fault by pressing the
3. 1 31 Day in least significant byte 107 6B RW Uint16 e 1 23 e Time in most significant byte e 0 59 e Minutes in least significant byte 108 6C RW ms Uint16 0 59999 Milliseconds 109 6D R Uint16 e Most significant byte error code e Least significant byte product status 0x00 Normal operation 0x01 Self test 0x02 Insulation fault 0x03 Wiring connection lost 0x04 Capacitance too high 0x05 Faulty product 48 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Communication Monitoring Alarm Status Settings Register Address Modbus RW Unit Type Range Description dec hex 1000 3E8 R Ohm Float32 Resistance The value NaN Not a Number is returned during the self test 1002 3EA R nF Float32 Capacitance The value NaN Not a Number is returned during the self test 1008 R Uint16 0 Injection VO wiring Injection inhibition activated input 1 Injection deactivated Register Address Modbus RW Unit Type Range Description dec hex 1100 44C R Uint16 0 No alarm Alarm 1 Alarm active e 2 Pre alarm active e 4 Transient alarm e 8 Alarm acknowledged Register Address Modbus Unit Type Range Description dec hex 3000 BB8 RW Uint16 0 Normally Injection inhibition input
4. Incoming feeder 1 Incoming feeder 2 D1 Coupling If Then The coupling is closed The same applies as in the exclusion example above involving 2 incoming feeders e The coupling is open and The 2 Vigilohm IM20 devices are active DI is closed e Vigilohm IM20 no 1 monitors the insulation of system 1 D2is closed e Vigilohm IM20 no 2 monitors the insulation of system 2 Vigilohm IM20 no 2 must be inhibited when the following 3 conditions are met e D1 is closed e D2 is closed e The coupling is closed 32 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Functions Example of Exclusion with Multiple Incoming Feeders and Couplings Using a PLC allows the wiring to be simplified and means that complex configurations can be considered Incoming feeder 1 S MV LV IM20 no 1 D1 C1 Coupling 1 Incoming feeder 2 MV LV IM20 no 2 Incoming feeder 3 S MV LV IM20 no 3 D2 D3 C2 Coupling 2 YVAN BH 1 Injection Inhibition Truth table Possible Configurations D1 D2 D3 C1 c2 IM20 1 IM20no 2 M20 no 3 0 0 0 0 0 9 1 9 1 om 0 0 0 0 1 00 9 0 om 0 1 1 1 1 00 0 2 10 1 1 1 1 1 0 2 100 1 1 The Vigilohm IM20 monitors the transformer 2 The Vigilohm IM20 injects a signal into the system 3 The Vigilohm IM20 is excluded from the system injection inhibited Injection Inhi
5. 16 Set Date Timee 1 The Read Holding and Read Input registers are identical VIGED310022EN 09 201 1 47 Vigilohm IM10 IM20 Communication Modbus Registers Table Table Format Register tables have the following columns Register Address Modbus RW Unit Type Range Description dec hex e Modbus Register Address Address of register encoded in the Modbus frame in decimal dec and hexadecimal hex formats e RW Whether the register is read only R or read write RW e Unit The unit the information is expressed in e Type The encoding data type e Range The permitted values for this variable usually a subset of what the format allows e Description Provides information about the register and the values that apply System Status Register Address Modbus RW Unit Type Range Description dec hex 102 103 65 66 R Uint16 Encoded version Firmware version X Y Z 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 Zrepresents the quality revision number which is encoded in register 103 105 69 RW Uint16 0 99 Year from 2000 to 2099 in e least significant byte e Most significant byte reserved 106 6A RW Uint16 e 1 12 e Month in most significant byte
6. 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 list button 3 4 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 v 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 one digit to the right within a numerical value 5 Contextual menu For confirming the selected item button 1 For executing the manual test For accessing a menu or sub menu or for editing a parameter For acknowledging alarms 38 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Human Machine Interface Information Icons The following 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 alarm status Icon Description Main menu Identifies the system resistance when there is no insulation fault e Measurement parameters menu Fault log menu Vigilohm IM20 Setting parameters menu Interface language selection menu Product identification Indicates an insulation fault alarm or pre alarm gt GgD E
7. I O Config Password Language Portugu s IMD IM10 Firmware Version Serial No QR Code Smartphone Identification 36 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Human Machine Interface Vigilohm IM20 Menu Structure Vigilohm IM20 Menu Structure MENU R kQ IMPEDANCE C uF Zc SETUP SUMMARY Alarm kQ Alarm Delay 5 Setting s Logging Settings Date Time Alarm Alarm Alarm Delay PreAlarm Filtering Setting 4 s 40 s Frequency Network Network boro I O Config Relay Inhibit Input Address Password Displa ontrast Francais hx Espa ol Italiano Deutsch Portugu s IMD IM20 Version Serial No QR Code Smartphone Identification VIGED310022EN 09 2011 37 Vigilohm IM10 IM20 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 alarm setting 3 Navigation Buttons Navigation Buttons The navigation buttons enable quick and intuitive navigation GH Ho Ho Legend Button Icon Description 1 Menu Displays the level 1 menu Menu
8. open configuration 1 Normally Default value 0 Normally open closed 3001 BB9 RW Uint16 1 Standard Alarm relay logic command connection Default value 2 Failsafe 2 Failsafe 3002 BBA RW Ohm Uint32 500 Q 500 Alarm threshold Default value 1 3004 BBC RW Ohm Uint32 1kQ 1 MQ Pre alarm threshold OxFFFFFFFF OFF is used to deactivate the OFF pre alarm Default value OXFFFFFFFF Deactivated 3007 BBF RW s Uint16 0 300 Alarm delay Default value 0 3008 BCO RW s Uint16 e 4s System filtering e 40s Default value 40 s 3009 BC1 RW Hz Uint16 e 50 System frequency e 60 Default value 50 Hz e 400 O for DC System 3014 BC6 RW Uint16 0000 9999 Password Default value 0000 3015 BC7 RW Uint16 0 Password protection Deactivated Default value O Deactivated 1 Activated VIGED310022EN 09 2011 49 Vigilohm IM10 IM20 Communication Log 3016 BC8 RW Uint16 e 0 English Interface language 1 Francais Default value O English 2 e 3 mx 4 Espa ol 5 Italiano e 6 Deutsch 7 Portugu s 3017 BC9 RW Uint16 0 100 Display contrast Default value 50 3018 BCA RW Uint16 10 100 Display brightness Default value 100 3019 BCB RW Uint16 e 0 None HV plate 1 HV1000 Default value 0 No plate Register Address Mo
9. proceed as follows Step Action 1 Using a flat screwdriver lt 6 5 mm lower the locking mechanism to release the device 20 VIGED310022EN 09 2011 Vigilohm IM10 IM20 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 NOTE Terminals 11 to 16 are not available on the Vigilohm IM10 P N 3P 3P N L3 i La L1 gt 1 r_T a N A 8 C a EIL 6A Ed s 1200 Vez 110 415 125 2 6A 123 45 CO DI CJ Contact min s 24 V 5 mA 6 1i 11 12 13 14 1516 y PU 0v DO A A Tx Modbus RS 485 D1 B Rx B Txt Relay setting Relay setting Relay setting Failsafe 20 Standard 20 Failsafe IM10 IM20 recommended ra r 678 678 678 gt 12 V 100 mA gt 12 V 100 mA ado J lt 250 VA 24V 6A _8 x 250 V 24 V 6A si 6A The relay operating mode fail safe or standard is controlled via the HMI of the Vigilohm device IM10 IM20 or by means of Modbus communication Vigilohm IM20 Connection Characteristics All the terminals of the Vigilohm IM10 and IM20 have identical characteristics
10. OK contextual menu button 40 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Human Machine Interface Modifying Parameters Presentation To modify any of the values you must be thoroughly familiar with how the interface menus are structured and the general navigation principles For more information about how the menus are structured please refer to the section that relates specifically to your Vigilohm model e IM10 see page 36 e IM20 see page 37 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 Time Alarm triggering delay Password Modbus address Vigilohm IM20 Selecting the Value in a List To select a value in a list Use the W or A contextual menu buttons to scroll through the parameter values until you reach the desired value then press OK 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 T allows you to modify the selected digit allows you to select the digit to the left of the one that is currently selected or to loop back
11. all safety messages that follow this symbol to avoid possible injury or death A DANGER 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 This is the safety alert symbol It is used to alert you to potential 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 and has received safety training to recognize and avoid the hazards involved VIGED310022EN 09 2011 VIGED310022EN 09 2011 About the Book Ata Glance Document Scope Validity Note Related Documents User Comments This manual is intended for use by designers system builders and maintenance technicians who are concerned with ungrounded electrical distribution systems IT featuring insulation monitoring devices IMDs
12. between R and C goes into R is weak lt becomes difficult to measure R and is completely impossible in the case of very high C values C is measured correctly Significance of R Significant measurement for the installation Significant measurement for the installation Obtaining an accurate measurement of R is of no significance as the system is sound Significance of C Obtaining a measurement of C is of no significance when there is an insulation fault Significant measurement for the installation Significant measurement for the installation An excessively high C value corresponds to the maximum limits of an IT system Above 40 pF the product is outside of its operating range and fails 26 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Functions Accuracy Zones The graph below illustrates the accuracy zones for the Vigilohm Accuracy 1 digit O Example for 1 Display 50 5 500 0 8 1 2 kQ Pho v d 7 U Y 1 digit 1000 i e an absolute accuracy of 20 20 5 1 digit 5 A 100 Q 5000 1kQ tuc 2 0 10 max Insulation resistance Level of R is weak in the event of fault Levels of R and C are medium Levels of R and C are high With Filtering of 4 s 1 e T 4 ON With Filtering of 40 s e 2 e T 10 Accuracy zone limit In practice the accuracy zone limit is linked to the product of R MQ x C
13. must be grounded using a sufficiently high level of impedance In the event of only one ground or earth fault the fault current is very low and interruption is unnecessary However given that a second fault could potentially cause the circuit breaker to trip an insulation monitoring device has to be installed to indicate an initial fault This device must trigger an audible and or a visual signal By constantly monitoring the insulation resistance you can keep track of the system quality which is a form of preventive maintenance Monitor the Leakage Rate C According to standard IEC 60364 4 41 the following applies to an AC system Rax las 50 Where e Ra is the sum of the resistance values in Q for the ground connection e la is the fault current in A in the event of an initial dead short Thus it is necessary to have a good level of grounding resistance and to monitor C as a is dependent on the impedance of C l4 U Ze One solution is to display the value of C so you can check that it is below the limit It is also important to avoid a situation whereby an industrial site is dependent on a single isolation transformer particularly as a result of grounding schemes being shared by different applications plant shutdown Example limits 70 uF for a 440 V system 40 UF for a 690 V system For more information see Cahier Technique n 178 Function of Vigilohm IM10 and IM20 Devices The Vigilohm IM10 and IM20 are d
14. relay changes over for 3 s so that the user knows that he or she has located the insulation fault by opening circuit breakers in order to find the insulation fault for example 5 The Vigilohm reverts to normal status XX INSULATION 100 1k 10k 100k 1M 10M R 500 kQ 1 100 1k 100k 1M 10M When the Vigilohm is in the alarm status and the user fails to acknowledge the alarm the insulation fault is transient The display and the 2 two color LEDs on the Vigilohm indicate the device s current status LEDs Description ON Alarm Vigilohm de energized flashes slowly Vigilohm energized no insulation fault detected Ss flashes slowly Vigilohm energized pre alarm detected Ss flashes slowly Vigilohm energized insulation fault detected flashes slowly Vigilohm energized transient insulation fault detected Vigilohm energized but malfunctioning 28 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Functions Pre alarm and Alarm Thresholds You can set the pre alarm and alarm thresholds as follows Threshold Setting Range Default Value Pre alarm 1kQ 1MQ Inactive Alarm 0 5 500 1kQ When the device is powered up it reverts to the most recent pre alarm and alarm threshold values saved The pre alarm threshold must always be set higher than the alarm threshold Filtering Measureme
15. 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 Y 40 gt 40 VIGED310022EN 09 2011 17 Vigilohm IM10 IM20 Installation Flush mounting and Dismantling Presentation The Vigilohm can be attached to any flat rigid vertical support using the 3 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 Installation on a Support Before attaching the Vigilohm check the following e The mounting plate must have a thickness of between 0 8 and 3 2 mm e A square measuring 92 x 92 mm must be cut out from the plate so the device can be installed e No terminal blocks may be connected to the unit To install the Vigilohm 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 3 spring clips into the fixing slots on the device as follows Mounting Plate Thickness Fixing Slots to Be Used 0 8 mm lt X lt 2 2 mm lt X lt 3 2 mm 3 Wire up and insert the terminal blocks as shown in the relevant wiring diagram see page 21 and as appropr
16. status of the insulation the alarm relay is or is not activated according to the mode selected failsafe by default or standard The failsafe alarm relay is activated in the following cases e An insulation fault is detected The product has failed e e The auxiliary voltage of the power supply is accidentally lost e When the insulation fault disappears the alarm relay is activated for 3 seconds This makes it easier to locate the 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 the audible signal allows you to identify and locate the fault when working remotely To enable calculation of the Zc value the frequency of the power system must be configured The following DC values are supported in the case of a DC system 50 Hz 60 Hz and 400 Hz The default value is 50 Hz VIGED310022EN 09 2011 29 Vigilohm IM10 IM20 Functions Operation on Systems with a Voltage of More Than 480 Vac If the device is being operated on a system with a voltage of more than 480 Vac with a high voltage plate the HV plate parameter must be configured as HV1000 The default value is None operation without plate and on a system with a voltage of under 480 Vac 30 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Functions Injection Inhibition Input Vigilohm IM20 Exclusion The IMD injects a low fre
17. to the digit on the right e OK confirms the new parameter value After you have confirmed the modified parameter one of 2 things will happen e lf 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 Out of range and the editing screen remains active A value is deemed to be out of range when it is classed as forbidden or when there are several interdependent parameters for example To abort the current parameter entry press the Esc button The screen reverts to the previous display VIGED310022EN 09 2011 41 Vigilohm IM10 IM20 Human Machine Interface Clock Vigilohm IM20 Description The time must be set e Whenever the power supply is interrupted e When switching from winter to summer time If the auxiliary power supply is interrupted the Vigilohm IM20 retains the date and time setting from immediately before the interruption The Vigilohm IM20 uses the date and time parameter to time tag the system insulation faults recorded Icon When the Vigilohm IM20 is powered up the clock icon flashes on the system monitoring screens to indicate that the clock needs to be set Setting To set the date and time please refer to the procedure for modifying a numerical value see page 41 Date Time Format The date is displayed in the format dd mm yyyy The time is displayed using
18. uF The Vigilohm limit is dependent on the type of filtering selected e With filtering of 5 to R max X C 4 e With filtering of 40 s to R max x C 10 Example with filtering of 4 s q 1 1974 If C 1 pF amp 4 C 1 MO If C 1 pF to C 4 If C 10 pF C 100 If C 10 pF to C 400 Example with filtering of 40 s 2 12 10 If C 1 pF 7 C 2 If C 1 pF to C 10 MQ If C 10 pF 14 C 200 If C 10 pF C 1 VIGED310022EN 09 201 1 27 Vigilohm IM10 IM20 Functions Monitoring the System Insulation Functional Description Insulation Activation of relay alarm Standard Alarm LED Display Status Information ON O The Vigilohm monitors the IT system insulation in kQ in accordance with the following timing diagram ON OFF OFF XX INSULATION XX INSULATION R 500 kQ 1 100 1k 10k 100k 1M 10M R 0 5 1 100 1k 10k 100k 1M 10M FAULT INSULATION R 0 5 1 An insulation fault is detected the system 2 Once T has elapsed alarm time delay the Vigilohm switches to the alarm status The alarm relay changes over and the alarm LED lights up 3 The user acknowledges the alarm by pressing the X button The alarm relay reverts to its initial status 4 When the insulation fault has been corrected the alarm
19. value in ohms at the time of the event s Word 10 occurrence encoded in Float32 in the last 2 registers Word 11 Alarm type encoded in Uint16 in the last register Word 12 Uint16 1 65534 Primary secondary record identifier for event Inthe case of a primary 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 Inthe case of a secondary record for an event this identifier is equal to the primary record identifier plus 1 50 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Communication Example of an Event The 2 records below represent an alarm that occurred at 12 00 on October 1 2010 and was acknowledged at 12 29 Record number 1 Register Address Modbus Unit Type Value Description dec hex 4002 FA2 _ Uint16 1 Record number 4003 FA3 Uint64 e 10 Date when alarm occurred October e 0 1 2010 12 00 e 10 e 1 e 12 e 0 e 0 4007 FA7 Uint32 e 1 Record identifier 0x40 e Primary record plus secondary e 1000 record e Float32 value insulation resistance e Value of register 1000 register for insulation resistance monitoring 4009 FA9 Ohm Uint64 10000 Insulation resistance value at the time of the alarm 4013 FAD Uint16 1 Secondary record identifier for event Record number 2 Register Address Modbus Unit Type Value Description dec hex 4014 FAE _ U
20. M10 IM20 Presentation Physical Description Physical Description The Vigilohm IM10 and IM20 feature 3 and 5 terminal blocks respectively identifiers A to E The various features of the Vigilohm are shown in the diagram below Q o mm m 200 00 Injection terminal block Vigilohm auxiliary power supply terminal block Alarm relay terminal block Modbus communication terminal block Vigilonm IM20 Injection inhibition input terminal block Vigilohm IM20 Contextual menu buttons Operating LED Alarm LED Display Menu button for accessing main menu Button for returning to previous menu or canceling a parameter entry Vigilohm serial number Vigilohm product catalog number IMD IM10 or IMD IM20 12 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Presentation Accessories Presentation The following accessories are sometimes required when installing the Vigilohm IM10 and IM20 e Asurge limiter Cardew C e AZX plate Below is a list of accessories for the Vigilohm devices Accessory Vigilohm IM10 Vigilohm IM20 Catalog number Cardew C 250 V surge limiter y y 50170 Cardew C 440 V surge limiter y 50171 Cardew C 660 V surge limiter _ A40 50172 Cardew C 1000 V surge limiter ya 50183 Cardew C base AG A0 50169 ZX plate limiting i
21. N 09 2011 13 Vigilohm IM10 IM20 Presentation ZX Limiting Impedance Function ZX limiting impedance enables you to create an installation with a high impedance grounded neutral system 1500 Q to 50 Hz ZX limiting impedance can be used on the following systems e Umax 480 Vac e Umax 345 Vdc Dimensions mm 185 15 Mounting Connection Cardewc Plate i IM10 5 3 2 High voltage HV Plate for Vigilohm IM20 Function The high voltage plate catalog number IMD IM20 1700 can be used to connect a Vigilohm IM20 to voltage systems higher than 480 Va L L connection with 400 V cable Dimensions mm 71 85 Mounting On DIN rail Connection B 480 V lt U lt 1000 V L L C 480 V lt U lt 1700 V L L 6A Cardew he 14 VIGED310022EN 09 2011 Installation What s in this Chapter This chapter contains the following topics Topic Page Safety Measures 16 Dimensions 17 Flush mounting and Dismantling 18 DIN Rail Mounting and Dismantling 20 Connection 21 Typical Applications 22 VIGED310022EN 09 2011 15 Vigilohm IM10 IM20 Installation Safety Measures Specific Hazard Associated with Insulation Monitoring Devices IMDs In the case of almost all electric and electronic devices the device s power supply is
22. Possible solution The device displays nothing when switched on The device is not being supplied 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 fault alarm threshold is not appropriate Check the value of the alarm threshold Modify the alarm threshold if necessary The fault pre alarm threshold is not appropriate Check the value of the alarm threshold Modify the alarm threshold if necessary You deliberately create an insulation fault but the device fails to detect it The resistance value used to simulate the fault is greater than the value of the fault threshold Use a resistance value that is lower than the alarm threshold or modify the alarm threshold The fault is not detected between neutral and ground Start again ensuring you are between neutral and ground The ON LED is red and the display shows WIRING CONNECTION LOST The Vigilohm injection circuit is cut off Check the connection on the injection terminal block terminals 1 and 3 and restart the self test The ON LED 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 power supply for the Vigilohm in the
23. The Vigilohm IM10 and IM20 are used to check the insulation of ungrounded distribution systems in industrial and naval contexts as well as in infrastructures They are suitable for small and medium sized systems C lt 40 uF without an automatic fault locator Title of Documentation Reference Number lectriques dans l industrie Guide d application Instruction Sheet Vigilohm IM10 Insulation Monitoring Device BBV35440 Instruction Sheet Vigilohm IM20 Insulation Monitoring Device BBV35475 The IT earthing system a solution to improve industrial electrical network availability PLSED110006EN Application guide Syst me de liaison la terre IT Une solution pour am liorer la disponibilit des r seaux PLSED110006FR System earthings in LV Les sch mas des liaisons la terre en BT r gimes du neutre Cahier technique n 172 The IT system earthing unearthed neutral in LV Le sch ma IT neutre isol des liaisons la terre en BT Cahier technique n 178 You can download these technical publications and other technical information from our website at www schneider electric com We welcome your comments about this document You can reach us by e mail at techcomm schneider electric com VIGED310022EN 09 2011 VIGED310022EN 09 2011 Presentation What s in this Chapter This chapter contains the following topics Topic Page Presentation 10 P
24. The table below shows the characteristics of the cables that can be used to connect the terminals Stripped Length Cable c s a Tightening Torque Type of Screwdriver 7 mm 0 2 2 5 mm 0 8 Nem Flat 3 mm VIGED310022EN 09 2011 21 Vigilohm IM10 IM20 Installation Typical Applications Presentation The following section presents 3 insulation monitoring applications for an IT island e One with a Vigilonm IM10 e One with a Vigilohm IM10 where the alarm is sent to a supervisor e One with a networked Vigilohm IM20 Monitoring the Insulation of an IT Island with a Vigilohm IM10 An IT island is a subsystem involving the use of a transformer whose neutral is not connected to ground The insulation is monitored by a Vigilohm IM10 with the following characteristics e lt is generally powered by the system that it monitors It is connected to neutral or to one phase and ground Its only setting is the fault threshold level It has a single relay output to a light or alarm sound Monitoring the Insulation of an IT Island with a Vigilohm IM10 Where the Alarm is Sent to a Supervisor The insulation is monitored by a Vigilohm IM10 whose alarm output is connected to an available input on a networked device a Power Meter or a PLC for example This device is itself connected to a supervisor via a communication network The restriction as far as this architecture is concerned is the fact that only the faul
25. VIGED310022EN Vigilohm IM10 Vigilohm IM20 Insulation Monitoring Device User Manual 09 2011 Schneider www schneider electric com ES Electric 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 requirement
26. bition Screen When the injection inhibition function of the Vigilohm IM20 is activated the screen below appears and replaces any system status screen that may be showing already insulation measurement alarm or pre alarm INJECTION DISABLED 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 T contextual menu button to launch the self test VIGED310022EN 09 2011 33 Vigilohm IM10 IM20 Functions Self test Description The Vigilohm has a self test function for testing e The product LEDs internal electronics e The measurement system and the alarm relay Running the Self test Sequence of LEDs Self test OK Self test Not OK The test can be run runs e Manually at any time by pressing the T 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 alarm status regardless of whether the alarm is active has been acknowledged or is transient During the verification sequence the LEDs light up in the following order Alarm white ON red Alarm yellow ON green If the self test is successful the following screen appears for 3 seconds AUTOTEST OK After that one of the status screens appears automaticall
27. dbus RW Unit Type Range Description dec hex 4000 FAO R Uint16 1 60 Number of event records 4001 FA1 R Uint16 Number of most recent record 4002 4013 FA2 FAD R Record Record 1 4014 4025 FAE FB9 R Record Record 2 4710 4721 1266 1271 R _ Record Record 60 Each event is stored using 2 records primary record which is created when the alarm or pre alarm occurs This contains the insulation value A secondary record which is created when the alarm or pre alarm disappears This contains the type of event acknowledged alarm transient alarm pre alarm Description of an Event Record in the Log The 2 records are logged consecutively Register Unit Type Range Description Word 1 _ Uint16 1 65535 Event record number Word2 Uint64 _ Time tagging of event using the same code as for the product Word 3 date time Word 4 Word 5 Word6 Uint32 e 0 1 Record identifier Word 7 e 0x40 0x10 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 0 for the secondary record 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 Word8 Uint64 _ Depending on the type of record primary or secondary Word 9 e Insulation resistance
28. event of a fault Although the Vigilohm is being Faulty LED Restart the self test and check that the supplied with power the ON LED ON LED lights up briefly does not light up The Alarm LED does not light up Faulty LED Restart the self test and check that the Alarm LED lights up briefly 54 VIGED310022EN 09 2011 Specifications Specifications Type of System to Be Monitored Characteristic Value LV AC DC IT systems Phase to phase voltage range 0 480 Vac max 0 345 Vdc max Frequency 45 440 Hz Limited in size IT subsystem Electrical Characteristics Characteristic Value Range for insulation resistance readings 0 1 KQ 10 MQ Range for capacitance readings Vigilohm IM20 0 1 40 uF Fault signaling Number of thresholds 2 password protected Prevent 1 kQ 1 MQ Fault 0 5 500 kQ Accuracy 5 96 Response time lt 5stypical lt 5s Device operating test Self test and manual test Internal impedance At 50 Hz 110 Failsafe feature 1 standard Output contact Number 1 standard or failsafe Type of contact Changeover Breaking capacity 250 Vac 6A Capacity 12 24 Vdc 6A Input contact Voltage supplied 24 V Circuit breaker position Minimum load 5 mA Time delay on signaling 0 600 s Auxiliary supply voltage 45 440 Hz 110 415 Vac 115 DC 125 250 Vdc 15 Maximum dev
29. f 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 16 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Installation Dimensions Vigilohm Dimensions IA P 22 ea pe m 110 B O 0 4 Oplaas 93 7 e y WI VIVIDA 9 lt 59 lt 924204 5 4 CAUTION CUTTING HAZARD Trim the edges of the cut out plates to
30. hysical Description 12 Accessories 13 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Presentation Presentation Use the IT System to Improve the Availability of Power Systems Continuity of service is an essential operational requirement for power systems as is ensuring the protection of people and property There are many applications which vary from country to country Apart from mandatory situations hospitals the navy the IT grounding system is typically used in instances where the unavailability of power would result in lost production or incur significant downtime costs Other potential applications are when there is a need to minimize the risk of fire and explosion Lastly the IT grounding system is chosen in certain cases because it can help facilitate preventive and corrective maintenance operations The ungrounded IT system is the best option for ensuring continuity of service Even after an initial insulation fault has occurred the installation can continue to function without posing any danger to people or equipment However the faulty circuit must be detected and repaired before a second fault occurs The fact that the IT system can tolerate an initial fault means that maintenance operations can be improved and carried out safely and without any pressure Monitor Insulation Resistance R Standards IEC 364 and IEC 61557 8 clearly state that with the IT system the installation must either be ungrounded or
31. iate for the type of device concerned Vigilohm IM10 or IM20 see page 12 18 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Installation Removal from a Mounting Plate 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 3 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 C 0 9 3 Reinsert the terminal blocks making sure that the correct positions on the device Vigilohm IM10 or IM20 see page 12 are observed VIGED310022EN 09 2011 19 Vigilohm IM10 IM20 Installation DIN Rail Mounting and Dismantling Presentation You can install the Vigilohm on a DIN rail The device must not be tilted following installation When mounting the device on or dismantling it from a DIN rail you can keep the terminal blocks connected and or wired up or you can remove them and keep them to hand DIN Rail Mounting To install the Vigilohm on a DIN rail proceed as follows Step Action 1 Position the 2 upper slots on the rear of the Vigilohm on the DIN rail 2 Press the device against the DIN rail until the locking mechanism engages The device is now attached to the rail Removal from a DIN rail To remove the Vigilohm from a DIN rail
32. ice consumption 12 VA Measurement voltage 75 V peak Measurement current 0 9mA Dielectric strength 4000 Vac 5500 Vdc 1 Failsafe The relay is deactivated either on occurrence of a fault or if the auxiliary supply voltage accidentally fails Mechanical Characteristics Characteristic Value Weight 0 25 kg Thermoplastic case Mounting Panel or DIN rail Degree of protection Front IP52 VIGED310022EN 09 2011 55 Vigilohm IM10 IM20 Specifications Other Characteristics Characteristic Value Temperature range For operation 25 55 C For storage 40 70 C Climatic conditions 60068 Use Indoors Altitude Up to 2000 m Degree of pollution 2 Maximum overvoltage CAT III Standards Product IEC 61557 8 Safety 61010 1 Installation IEC 60364 4 41 1 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 2 The nominal operating voltage is 300 V L N according to standard IEC 61010 1 Locating Faults Manually Use a mobile fault locating kit catalog number 50310 containing 1 locating signal generator e 1 XRM locating signal receiver e 3tong type current probes For more information please refer to the Vigilohm 2011 Catalog As the current injected by the Vigilohm IM10 or IM20 i
33. igital insulation monitoring devices IMDs for low voltage systems with isolated neutral IT Umax 480 Vac Ph Ph or Umax 345 Vdc They can be used to monitor the insulation of a system and signal any insulation faults as soon as they occur The Vigilohm IM10 and IM20 apply a low frequency AC voltage between the system and ground The insulation is then assessed on the basis of the current value returned This method is used for all types of system AC DC mixed with rectifiers with variable speed drives etc The Vigilohm IM10 and IM20 offer the following functions e Insulation resistance display R e Detection of insulation faults in accordance with a configurable threshold The Vigilohm IM20 offers the following additional functions Leakage rate display C with display of associated impedance Zc e Communication via the Modbus RS 485 protocol e Injection inhibition via logic input e Insulation fault log VIGED310022EN 09 2011 Vigilohm IM10 IM20 Presentation Selection Guide Function Vigilohm IM10 Vigilohm IM20 Measurement and display of IT system insulation resistance y Measurement and display of leakage rate C Calculation of impedance Zc associated with C Time tagged insulation fault log Communication via Modbus RS 485 Injection inhibition input e Compatibility with high voltage plate VIGED310022EN 09 2011 11 Vigilohm I
34. int16 2 Record number 4015 FAF Uint64 e 10 Date when alarm disappeared October e 0 1 2010 12 29 e 10 e 1 e 12 e 29 e 0 4019 FB3 _ Uint32 e 1 Record identifier e 0x10 e Secondary record e 1100 e Uint16 value alarm acknowledged e Value of register 1100 alarm status register 4021 FB5 Uint64 8 Value of alarm register at the time of alarm acknowledgement 4025 FB9 Uint16 2 Secondary record identifier for event VIGED310022EN 09 2011 51 Vigilohm IM10 IM20 Communication 52 VIGED310022EN 09 2011 Maintenance and Troubleshooting Maintenance and Troubleshooting Satety Precautions The following safety precautions must be thoroughly implemented before attempting to repair electrical equipment or carry out maintenance Carefully read and follow the safety precautions described below A DANGER RISK 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 work 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 re
35. ion and continuously measure R which is the insulation resistance The Vigilohm IM20 also measures C which is the leakage rate to the distribution system and calculates the impedance Zc associated with C General Information Regarding the Measurement Accuracy of R When measuring the insulation resistance R a high degree of accuracy is not required because the aim is merely to detect a fault and to anticipate an abnormal drop in the insulation value In practice the level of accuracy remains good 5 96 across the normal usage range Although it deteriorates outside of this range there is no impact as far as the user is concerned Physical Limits of R and C The diagram below shows the insulation resistance R and the leakage rate C of the system cet Possible Scenarios in Practice The following situations may occur on an installation The gray arrows represent the preferred route for the IMD injection signal Throughout the duration of the insulation fault the R measurement is inaccurate Measuring C is difficult particularly if C is weak R and C can be measured correctly R and C Value R Weak in the Event of a C Medium R Medium R and C High Fault Equivalent Circuit Diagram e BEL DER C R ct R C R Most of the injection signal The injection signal is The injection signal that Measurements goes into R shared
36. mpedance y y 50159 High voltage HV plate HV IM20 y IMD HV IM20 1 7 1 Compatible with the Vigilohm IM20 when used with HV plate HV IM20 2 Compatible with all Cardew C catalog numbers see page 56 Cardew C Surge Limiter NOTE For all information regarding mobile fault locating accessories please refer to the relevant section 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 lt protects 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 300 Vdc Selection Table Un Nominal Phase to Phase Voltage of AC Ui Flashover Voltage Type of System Cardew C Neutral available Neutral not available U lt 380 V U lt 220 V 400 V lt Ui lt 750 V 250 V 380 V lt U lt 660 V 220 V lt U lt 380 V 700 V lt Ui lt 1100 V 440 V 660 V lt U lt 1000 V 380 V lt U lt 660 V 1100 V lt Ui lt 1600 V 660 V 1000 V lt U lt 1560 V 660 V lt U lt 1000 V 1600 V lt Ui lt 2400 V 1000 V Dimensions mm 1 20913 70 100 Mounting Cardew C mounted directly on busbars e Mounting with plate mounted base Connection MV LV VIGED310022E
37. nt Quality On a system the measurement varies continuously depending on the following Alarm Time Delay Alarm Relay System Frequency e Number of loads e Type of loads e Load switching e Size of the system effect of C To prevent the display from fluctuating and to avoid inappropriate alarms the measurements are filtered for 4 s or 40 s The response time associated with this filtering function does not create any problems within the context of this application The Filtering parameter offers a choice between the following 2 modes Filtering Description Example of Use Measurement Response Time Update Time Required to When Monitoring Detect an the Insulation Insulation Fault 4s Allows optimization of the To facilitate manual 0 8s 4s response time location of a fault by e Manual fault location opening each of the circuit phase breakers in turn Automatic location of a transient fault 40s Suitable for most 8s 40 s applications The default value for the Filtering parameter is 40 s It sometimes makes sense to delay the triggering of an alarm while certain machines are starting up otherwise erroneous alarms could be triggered To set the alarm time delay proceed as follows Setting Setting Range Default Value Alarm time delay 0 600 s 0s The actual time delay lies somewhere between the selected value and this value plus 4 seconds Depending on the
38. on of the RS 485 Communication Port 46 Table of Modbus Functions 47 Modbus Registers Table 48 VIGED310022EN 09 2011 45 Vigilohm IM10 IM20 Communication Configuration of the RS 485 Communication Port Communication Parameters Before initiating any communication processes configure the Modbus communication port via the HMI Settings gt Modbus menu on the Vigilohm IM20 Parameters Authorized Values Default Value Baud rate 4800 Baud 9600 Baud 19 200 Baud 38 400 Baud 19 200 Baud Parity Even Odd None Even Address 1 247 Signaling of Communication Activity On the Modbus parameter setting screen the green ON LED indicates the status of communication between the Vigilohm IM20 and the master as follows If Then The LED is flashing Communication with the device has been correctly established The LED is on permanently There is no active communication between the master and slave 46 VIGED310022EN 09 2011 Vigilohm IM10 IM20 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
39. quency into the system In a system with several incoming feeders depending on the circuit breaker position there must be no more than one IMD injecting into the system This injection exclusion is managed by the inhibition input of the Vigilohm IM20 which is connected to the auxiliary contacts of the circuit breakers The injection inhibition input can be configured to use an NO contact injection activated when the contact is open and injection deactivated when the contact is closed or a NC contact injection activated when the contact is closed and injection deactivated when the contact is open The default value is NO Example of Exclusion with 2 Incoming Feeders Incoming feeder 1 Incoming feeder 2 If Then Di is closed and The 2 Vigilohm IM20 devices are active e D2is open e Vigilohm IM20 no 1 monitors the system insulation Vigilohm IM20 no 2 only monitors the insulation of the transformer 2 connection as far as D2 Diis open and The 2 Vigilohm IM20 devices are active e D2is closed e Vigilohm IM20 no 1 monitors the insulation of the transformer 1 connection as far as D1 e Vigilohm IM20 no 2 monitors the system insulation e Diisclosed and e Vigilohm IM20 no 1 monitors the system insulation e D2is closed e Vigilohm IM20 no 2 must be inhibited VIGED310022EN 09 2011 31 Vigilohm IM10 IM20 Functions Example of Exclusion with 2 Incoming Feeders and One Coupling
40. s the relevant instructions 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 O 2011 Schneider Electric All rights reserved VIGED310022EN 09 2011 Table of Contents Safety Information asa ira fatte rasiert 5 About the BOOK rn 7 Chapter 1 Presentation s oras ceed a EE EXER 9 Presentation eire EE eR edet uod Sale ha ais ae hayaq BA ada 10 Physical Description iceri siria AA 12 ACCOSSOLIOS uns ie Be desde tdeo ie tae lecto dd at x 13 Chapter2 Installation oou i Ip a a 15 Safety Measures cio rd ae dr ig 16 Dimensions HE A A A ee au 17 Flush mounting and Dismantling llle RII 18 DIN Rail Mounting and Dismantling BIA 20 21 Typica Applications ner A ERE Ue e ER Des 22 Chapter 3 Functions Erle E Le 25 Rand C Measurement ehh rrr 26 Monitoring the System Insulation 28 Injection Inhibition Input Vigilohm IM20 lessen BB 31 SEITE ST Tor DF T ET 34 Chapter 4 Human Machine Interface 35 Vigilohm IM10 Menu Structure oooocccccccc eee RI I I nen 36 Vigilohm IM20 Menu Structure
41. s insufficient for the XRM the XGR 2 5 Hz injector must be used when locating faults Proceed as follows 1 Connect the XGR to neutral if there isn t one to a phase and to ground 2 Use the XRM to locate the fault Calibrate to 18 to indicate the fault as a function of the fault current Ignore the measurement indicated by the Vigilohm IM10 or IM20 as the XGR may interfere with it 56 VIGED310022EN 09 2011 VIGED310022EN Schneider Electric Industries SAS As standards specifications and designs change from time to time please ask for confirmation 35 rue Joseph Monier of the information given in this publication CS30323 F 92506 Rueil Malmaison Cedex www schneider electric com 09 2011
42. sult in death or serious injury NOTICE RISK OF DAMAGE TO VIGILOHM 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 ON LED The red ON LED indicates an error relating to one of the following Interruption of the injection circuit Self test not OK Device fault Capacitance too high C gt 40 uF Interruption of the Injection Circuit If the injection circuit of the Vigilohm is interrupted the display shows the message below and starts flashing WIRING CONNECTION LOST Self test The Vigilohm performs a series of self tests on start up and then at regular intervals during operation in order to detect any potential faults in its internal and external circuits For more information on the self test function please refer to the relevant section see page 34 VIGED310022EN 09 2011 53 Vigilohm IM10 IM20 Maintenance and Troubleshooting Troubleshooting The table below 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 please contact your Schneider Electric regional sales representative for assistance Potential problem Probable cause
43. t information is available at supervisor level 22 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Installation Monitoring the Insulation of an IT Island with a Networked Vigilohm IM20 When the Vigilohm IM20 monitoring device is linked to the supervisor via a Modbus connection the following actions are supported e Display e The status of the product e The status of the alarm active not active acknowledged e Details of the last 30 time tagged events e The values for R and C in order to create tables or curves for monitoring these values over variable periods e Configure the product remotely All the settings can be accessed remotely with the exception of the Modbus parameters gateway Ethernet Modbus YN The architecture option that involves going via an Ethernet gateway enables you to make use of an existing Ethernet network VIGED310022EN 09 2011 23 Vigilohm IM10 IM20 Installation 24 VIGED310022EN 09 2011 Functions What s in this Chapter This chapter contains the following topics Topic Page R and C Measurement 26 Monitoring the System Insulation 28 Injection Inhibition Input Vigilohm IM20 31 Self test 34 VIGED310022EN 09 2011 25 Vigilohm IM10 IM20 Functions R and C Measurement Insulation Measurements The Vigilohm IM10 and IM20 are designed to monitor the IT system insulat
44. the 24 hour clock in the format hh mm 42 VIGED310022EN 09 2011 Vigilohm IM10 IM20 Human Machine Interface Insulation Fault Description Fault Event Screen Log Vigilohm IM20 The Vigilohm IM20 records the details of the 30 most recent insulation fault events that have triggered one of the 2 statuses below e Pre alarm e 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 the table is not reset By referring to this information the performance of the distribution system can be improved and maintenance work facilitated The figure below shows the display elements associated with an insulation fault event 5 6 Legend Description 1 Insulation fault value recorded 2 Type of insulation fault recorded alarm pre alarm transient alarm 3 Date and time when the alarm fault pre alarm or transient fault occurred 4 Date and time when the event disappeared e X Alarm acknowledgment T Disappearance of pre alarm or transient alarm Number of event displayed Total number of events recorded VIGED310022EN 09 2011 43 Vigilohm IM10 IM20 Human Machine Interface 44 VIGED310022EN 09 2011 Communication via Modbus RS 485 Vigilohm IM20 What s in this Chapter This chapter contains the following topics Topic Page Configurati
45. the root cause of electrical hazards The hazard can be eliminated by disconnecting the power supply This is notthe case with insulation monitoring devices which are connected to the system via the injection wire Consequently this connection must be broken before carrying out any kind of work on the product DANGER RISK OF ELECTRIC SHOCK EXPLOSION FLASH e Before carrying out work of any kind disconnect the Vigilohm from the monitored system by disconnecting the injection wire at terminal 1 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 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 DANGER RISK 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 relevant information e NEVER work alone e Before performing visual inspections tests or maintenance on this equipment disconnect all sources o
46. y system insulation resistance measurement insulation fault alarm or IT transformer fault alarm If the self test fails the Alarm LED turns red and a message is displayed to indicate that the product is malfunctioning If this happens briefly disconnect the auxiliary power supply of the Vigilohm If the fault persists contact technical support 34 VIGED310022EN 09 2011 Human Machine Interface Presentation The Vigilohm features a sophisticated and intuitive human machine interface HMI with signaling LEDs a graphic display and contextual menu buttons for accessing the information required to operate the Vigilohm and make parameter settings What s in this Chapter This chapter contains the following topics Topic Page Vigilohm IM10 Menu Structure 36 Vigilohm IM20 Menu Structure 37 Navigating the Interface 38 Status Screens 40 Modifying Parameters 41 Clock Vigilohm IM20 42 Insulation Fault Log Vigilohm IM20 43 VIGED310022EN 09 2011 35 Vigilohm IM10 IM20 Human Machine Interface Vigilohm IM10 Menu Structure Vigilohm IM10 Menu Structure MENU INSULATION R Monitoring SETUP SUMMARY Alarm kQ Alarm Delay s Setting s Alarm Alarm Alarm Delay PreAlarm Setting 4 s 40 5 Activation Backlight English Frangais hx Espa ol Italiano Deutsch Settings Filtering
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