LIQ - 60 User Manual
Contents
1. LIQ 60 User Manual ELED LEER LEELA TELLER TL EDI LAE LLL LLLE LELE LER DELTA Overhead line b AT T Ta H H RTE ANANA TEETUIN TI Lie ad L ne IiVilonitc rinada VAN ry kel NE FT TT FE Cikdxrdansaia EE FAT TTT SHEEP ERRE LEELA RAE TREE LAL LR LELE ELER LEER ERER PANNAN GRIDSENSE LineIQ User Manual Trademarks Windows and Microsoft are registered trademarks of Microsoft Corporation Digi is a registered trademark of Digi International Inc All other trademarks are property of their respective owners Copyright CHK GridSense Pty Ltd 2011 2012 The material presented in this manual is copyright protected by CHK GridSense Pty Ltd 2011 Any reproduction in whole or part for any purpose without the prior written consent of GridSense Pty Ltd is strictly prohibited Information in this document is subject to change without notice Version 2 i May 2012 GRIDSENSE LineIQ User Manual Contents MOO mm 1 1 1 HdzardASSeSSImellb sow mitan akte kn tn a anti ak e kt a kk e e n a ide ty NN 1 1 2 Working on energised conductors and equipment sees eee eee ee eee 1 1 3 EOUN SA SIV NETTO EET 1 2 Introduction to the LinelQ device family sese 2 2 1 OS SAMY ki rete toti atis be a 4 2 2 Implementation Scenarios eeesssssssssssssssese eene nnne nnns nnn nnns nna nnn nsn nan nnn 6 2 3 OYE2. Firmware transfer from buffer to flash ROM LIQ 60 synchronisation LIQ Gateway All three LIQ 60s on a feeder get synchronised prior to Power Factor measurements awaiting signal from Amber LED Red LED Table 1 LIQ 60 indicator LED flashing patterns 14 of 34 May 2012 ORIDSENSE LineIQ User Manual 2 4 5 Power Factor Calculation 2 4 5 1 Overview This overview gives a brief introduction to Power Factor values i e what is meant by Displacement Power Factor and True Power Factor See Appendix A LineMan which explains how to use LineMan to configure an LIQ 60 to measure Displacement Power Factor What Information is provided The LIQ 60 records the phase angle between the fundamental 50 60Hz voltage and current waveforms from which the Displacement Power Factor DPF can be derived This information is made available in the following formats e Instantaneous DPF and phase angle including lead lag of the line is returned when the LIQ 60 status is queried These parameters are averaged over approximately 1 minute and updated every minute e Average DPF and phase angle including lead lag are logged for each load log interval This interval can be set to be between 2 and 60 minutes Meaning of Power Factor Values The LIQ 60 will record power factor on power systems operating in all four quadrants of power flow Positive DPF indicates net energy flow is from source to load and negative DPF in
3. ORIDSENSE LineIQ User Manual Line Status The amber LED indicates line status The number of flashes emitted every 30 seconds indicates the line status as detailed below e One amber flash every 30 sec indicates that the line is energised voltage is present and is carrying current e wo amber flashes every 30 sec indicate that the line is energised voltage is present but is not carrying current e Three amber flashes every 30 sec indicate that neither voltage nor current are present on the line Fault Indication Only one red LED at a time will flash during a fault condition The LED produces a distinctive pattern of flashes every 10 sec as follows e One red flash indicates that a self clearing fault has been detected e Two red flashes indicate that a transient fault has been detected e Three red flashes indicate that a permanent fault has been detected Firmware Upgrades LIQ 60 firmware can be upgraded using the LIQ LocalLink and LineMan During this process the LEDs are used to indicate status as follows e Amber LED continuous fast flashing 10Hz indicates that firmware is being uploaded to the LIQ 60 buffer e Red LEDs continuous fast flashing 10Hz indicates that there has been an error during the firmware upload process into the buffer Once the firmware is successfully uploaded into the buffer the LIQ 60 copies the new firmware into flash memory This process is indicated by the amber LED being pe
4. Ajuanbau4 oipey U Ti L TT Uu 2 cr v May 2012 3 of 34 Version 2 GRIDSENSE 2 1 Glossary Term CMS Commission Configure DPF DTS Event Profile Recording Period Fast Filter FP HV IED LED LI LIQ Gateway LIQ LAN LIQ Version 2 Meaning Conductor Mounted Sensor which detects events on a conductor and logs voltage current and temperature for periodic downloading The LIQ 60 is a CMS Putting equipment into use for the first time Follows after configuration The process of setting up equipment to perform a designated task In this manual refers mainly to firmware Follows after set up Displacement Power Factor A measure of the phase difference between the voltage and current 4 DPF cos Ideally should be 0 degrees so DPF 1 Date amp Time Stamping The time e g 1 minute after an event has been detected and during which the LT 60 records current and power profiles A 5 sec average value filter applies to both current I and voltage V Fault Path a high current event High Voltage Intelligent Electronic Device Light Emitting Diode Long Interruption a loss of power on a conductor for at least one minute The Pole Attached Collator which receives and collates data from CMS A local area network consisting of a PC Laptop with LIQ LocalLink for communications an LIQ Gateway amp its associated LIQ 60 A U
5. Logged data Battery specifications Power source Current use Clamping mechanism Conductor size Weight Dimensions Temperature ranges Humidity range Version 2 Description Interfaces Local RF Communication RF range 30m 100ft line of sight Three high intensity LEDs 2 x red amp 1 x amber Sensing and logging 5kV to 138kV 45 to 65Hz Fault detection range 5A 25kA Load logging range 1A 25kA Accuracy 5 or 1A whichever is greater Proprietary algorithms based on current and voltage ratios adaptive to the line signature i e load and voltage history Inrush restraint Total Memory 196 Kbytes available Event data 32 Kbytes Load log 164 Kbytes optional Time stamped pre and post voltage status pre and post current values 200ms of fault current waveform 60ms pre and 140ms post fault 2nd harmonic calculations Mechanical and Power 4 x 2V 2 5Ah rechargeable SLA Battery 10 years life typ Dual power circuitry Solar panel and internal SLA Battery Battery specifications 4 x 2V 2 5Ahr creating a 10Ahr battery pack Solar charging max 150mA gives 100 charge in approx 17 days External Charging max 5A charge time approx 3 hours Normal operation No RF Transmission 5mA A spring loaded conductor clamp Mounting and de mounting by means of hot stick Approx 6mm 0 25 inch 32mm 1 25 inch diameter 2kg 4 4lb Height 315mm 12 4 in Depth 180mm 7
6. 2 Rotate the solar panel so that once the LIQ 60 is in position it will receive the most sunlight i e facing north when in the southern hemisphere and south when in the northern hemisphere 3 Adjust the angle elevation of the solar panel as discussed in section 72 So ar Panels 4 Clamp a hot stick hook onto the sprung slider and pull the hook and slider into the head of the hot stick This opens the LIQ 60 s conductor clamp and the sensing coil 5 Ensure the LIQ 60 is firmly secured to the hot stick 6 Install the LIQ 60 by hooking the top portion of its housing over the conductor so that the channel in the LIQ 60 s housing encompasses the conductor 7 Release the hot stick so that the sprung clamp and sensing coil close thereby clamping the LIQ 60 to the conductor 8 Take note of the reference arrow on the bottom of the LIQ 60 and in which compass direction this points e g north north west etc This is required to identify the direction of line faults when they occur 9 Please do not mount the CMS on an insulated conductor 6 1 3 Post installation checks 1 Check that the LIQ 60 is hanging vertically and has clamped securely onto the conductor 2 Check that the solar panel direction will maximise exposure to sunlight Check that the status LEDs are showing correct status both red LEDs flashing every second and a status amber flash every 30 sec if not yet commissioned or an amber flash every 30 sec when commis
7. LEM UNE WON NY fi eesti sec ata ace e ka isi dl k tl ap et ke ala f l di des ao e ik Reta be ron ei 6 2 4 LIQ 60 Conductor Mounted Sensor OVErViICW ccccccceeeceeceeeceeceeeceeceeeceeseeeeessaeeeessaeeeeeas 7 2 4 1 HG GO DESIN ee ee e ee ee eee e a fine e in im en Bo t 8 2 4 2 Bas ON SEM NO EE kel a ep n ik oo tn a kt ie tn pe ik n ei e it 8 2 4 3 PETA NON MOU SS uoi mda ana n s kin oke ae e e pe des ee iron ako NEU IU de dos 9 2 4 4 MAIS WA IMA ALO Se pa ev aa vi kab oi map a one tk n as ont e e l ea ptit yok jn ank e e Ga ea e 11 2 4 5 Power Factor Calculation sse eee 15 2 5 LIQ Gateway OV IVIOM P 17 2 6 LIQ LocalLink Overview eee eee eee eee 18 3 Tr gm root a a at kel ct ek ft l a a a e a ik el a a e n l n pe e n a kr a a pl n a m 19 3 1 LIQ LocalLink installation sese eee eee 19 3 1 1 For Microsoft VAN OW Si ki oti osle kan ai n ok a n n e f n n in tike y 19 3 1 2 For Microsoft Windows XH sees 19 3 2 HI GO SCID A PA L ye L E AYE MN EP A KEY E 20 3 2 1 Switching on the LIQ 60 eesssssssssesssseeeeeeeennnn nnne nennen nennen nn nnn nnn nnn nnns nnn 20 4 Ceu Me 21 4 1 LIQ 60 configuration 21 5 COMMISSION kit isk scree ete a EEE E E E e dp nose 21 5 1 Commissioning the B Ie c H 21 5 1 1 Pre commissioning check of the LIQ 60S eee eee 21 6 Installation and removal kit kilt l ti a kl a e n a n n k n n S n e k
8. and if present a laptop PC using an LIQ LocalLink form a local area network the LIQ LAN This network s communication is based on low power RF The LIQ Gateways which communicate with remote control rooms or SCADA systems can be viewed as a wide area network using any of a range of protocols such as DNP3 IEC 61850 or Web services Version 2 6 of 34 May 2012 GRIDSENSE LineIQ User Manual 2 4 LIQ 60 Conductor Mounted Sensor overview The LIQ 60 Conductor Mounted Sensor is a programmable Medium and High Voltage MV HV power grid logger used to detect and log fault conditions and to record load information voltage and conductor and ambient temperatures on power distribution networks Figure 3 shows the LIQ 60 Conductor Mounted Sensor Figure 3 The LIQ 60 Conductor Mounted Sensor The LIQ 60 is installed live on a bare overhead conductor and detects and logs disturbance events such as fault currents or loss and return of voltage Each event is date and time stamped DTS and recorded to non volatile memory for later analysis High intensity LEDs are provided to indicate line and fault status to maintenance crews The LIQ 60 can be configured to calculate and store time averaged load current i e load logging The Log Average interval can be selected in the range from 2 to 60 minutes Ambient and conductor temperatures are also recorded at the same Log Average interval The LIQ 60 can also measure and record Displac
9. solar panel to this angle relative to the horizontal The angle can be set between 25 to 65 relative to the horizontal The panel has 6 pre set stops in increments of 8 The following table list the angle increments _ gt n Stop 4 49 Stop 5 57 Stop 6 54 Table 2 LIQ 60 Angle Increments Version 2 25 of 34 May 2012 ORIDSENSE LineIQ User Manual Appendix A LineMan A 1 LineMan Overview LineMan is a software package supplied by GridSense for configuring and communicating with the LineIQ suite of products It is used during the commissioning phase when setting up an LIQ 60 or LIQ Gateway and subsequently when downloading information from the LIQ 60 or LIQ Gateway to a PC A 2 Setting up an LIQ LocalLink In order for a PC to communicate with an LIQ 60 or an LIQ Gateway it needs to use short range radio This is achieved by using an LIQ LocalLink which is a radio modem that plugs into a USB slot on a PC The first time you use the LIQ LocalLink on a PC it needs to have the correct driver loaded This driver forms part of Windows 7 so the LIQ LocalLink should have its driver automatically loaded when it is inserted into a USB slot Section 3 1 will detail installation procedures for Window 7 whereas Appendix B details installation procedures for Windows XP If you are using Windows XP you can install the driver off the CD containing LineMan 1 From Windows Explorer run the setup exe 2 Follow the inst
10. 4 2 4 GHz communications standard enabling it to communicate with a similar radio inside an LIQ 60 or LIQ Gateway The operating range depends on on site conditions the recommended operating range is 30m 100ft using an internal omnidirectional antenna The kit comes with a magnetic mount which can be attached onto any Ferromagnetic material Figure 5 The LIQ LocalLink modem Version 2 18 of 34 May 2012 ORIDSENSE LineIQ User Manual 3 INITIAL SETUP 3 1 LlIQ LocalLink installation 3 1 1 For Microsoft Windows 7 The drivers for the LIQ LocalLink type modem are included in Microsoft Windows 7 1 Plug the LIQ LocalLink into a USB port on a laptop 2 The first time that an LIQ LocalLink is plugged into a laptop s USB port the Microsoft Windows driver installation dialog will appear onscreen Follow the prompts to install the drivers Take note of the assigned COM Port number in the example below COM4 as this will be required when setting up the LineMan interface This example installation was done on Windows 7 Pro 32 bit SP1 Your device is ready to use USB Serial Converter d Ready to use USB Serial Port COMA d Ready to use Figure 6 Windows 7 dialog after LIQ LocalLink modem installation 5 To determine the COM Port connection access the Device Manager Control Panel System Device Manager and expend the selection Ports the selection USB Serial Port will identify the correct COM Port nu
11. 85 B 7 6210 Temp Conductor Cal Coeffs M 0 2101 B 2 2760 Temp Conductor Corr Factor 0 450 Relatie High Current Threshold Voltage OFF Detection Ratio Boot Counter Power Factor Calibration Coett FOB U 1 Figure 11 Displaying LIQ 60 Summary 2 Similarly click on Status to display information such as charge current battery voltage and etc Version 2 28 of 34 May 2012 GRIDSENSE LineIQ User Manual A 5 Configuring an LIQ 60 1 Click Device Config to display and or edit the LIQ description and measurement configuration Sensor Configuration LIQ6O Conductor Mounted Sensor CMS Description Length 0 hMax 50 Location Position Phase A L1 v T Hemotely Monitored Fault Detection w Event Recording Fault Ratio 22 200 Logging w Load Logging w Power Factor Logging W Log Temperature Ambient amp Conductor Log Average min 5 Lag capacity 14 days 05 15 Event amp Status Indication w Aled Fault w Amber Status Fault Reset Time min 1440 1 days 00 00 Advanced Options jf Enable Power Factor Clear Permanent Indication On Return of Power Figure 12 A 5 Configuring a CMS The user has the following configuration selection a b C d e f g h i Enter a 50 character description of the CMS Location into the Device Description field Select the Position Number of the conductor that the LIQ 60 is on e g 1 Phase A 2 Phase B etc S
12. E 34 C ETOCS SC CA NON CETTE Tm 34 Version 2 IV May 2012 ORIDSENSE LineIQ User Manual 1 SAFETY N If you do not understand any instructions in this manual please ask someone to assist you For safety reasons use only GridSense accessories specifically designed for use with these products or accessories that have been approved by GridSense The use of any other manufacturer s equipment is NOT recommended will void the warranty and may cause safety hazards The LIQ 60 Conductor Mounted Sensors are intended to be used on high voltage energised conductors or equipment Personnel using equipment on energised lines must be authorised by the relevant regulatory bodies to carry out such work and must have appropriate training The information given in this document is given as a guide only It is the user s responsibility to ensure that correct and safe procedures are followed at the actual worksite GridSense offers no warranty or indemnity for accidents that may occur when following these instructions If the LineIQ products and accessories and associated equipment are used in a manner other than that specified in this manual the protection provided by the equipment may be impaired 1 1 Hazard Assessment Prior to installing the equipment the operator must carry out a worksite pre job hazard assessment to identify the safety and environmental needs This must be done prior to commencing work and prior to recommencing wor
13. SB based radio Used for 4 of 34 Term LocalLink Loss of volts LV ms Permanent Fault PMS P P PR PRT Return of volts RF RMS RTC RTU SCADA LineIQ User Manual Meaning communications between a PC and the LIQ Gateway and LIQ 60s in an LIQ LAN When a CMS detects no voltage on the conductor Low Voltage milliseconds Fault detection with loss of supply detected after the end of the event profile recording period Pole Mounted Sensor as distinct from a CMS Peak to Peak A measure of a waveform s amplitude absolute unlike RMS P P 2 38Vems Power Return return of power after a Long Interruption LI Platinum Resistance Thermometer Two are mounted in each LIQ 60 to measure conductor and ambient temperature When a CMS detects a return of voltage on the conductor after a fault condition Radio Frequency Root Mean Square An amplitude of a measurable value e g Voltage written Vrms The Square root of the mean over time of the square of the waveform Real Time Clock Remote Terminal Unit In SCADA terminology the LIQ Gateway is an RTU It collates information from sensors to be sent to centralised control units Supervisory Control And Data Acquisition Usually a computer system that monitors and controls industrial or facility based May 2012 GRIDSENSE Term Self clearing fault Set up SI SLA Battery Version 2 Meaning p
14. a capacity of 10Ah A typical lifespan is 10 to 15 years 7 2 Solar Panels 7 2 1 Solar Panel orientation The LIQ 60 s built in solar panel provides all the energy required by the LIQ 60 The amount of energy produced depends on the following factors e he amount of incident solar energy This varies with the time of day the season the distance from the equator latitude and the amount of cloud cover e The angle at which the sun s rays strike the solar panel e he amount of shading e g by trees or nearby structures or obstruction e g by snow or dust of the solar panel When mounting a solar panel it is important to ensure that it is not in shade from nearby poles trees etc Two adjustments need to be taken into account when positioning the panel orientation and angle Orientation This is the direction in which the sun will be for most of the year i e north or south A panel s performance is optimum when facing towards the equator that is e facing north when in the southern hemisphere and e facing south when in the northern hemisphere See Figure 7 Version 2 23 of 34 May 2012 GRIDSENSE LineIQ User Manual Figure 7 Direction of solar panels in northern and southern hemispheres Angle With regard to angle from the horizontal the best angle for a solar panel that does not get adjusted for seasonal variation is 15 more than the latitude where the panel is installed For example Sacramento Cali
15. an be assigned to the correct quadrant Displacement Power Factor DPF is calculated from the measured phase angle where DPF cos For voltages and currents with low distortion as is normally the case on high voltage systems this calculated DPF is a good approximation to the True Power factor TPF Power factor measurements are averaged and recorded at the Log Average Interval Recorded data includes phase angle sign leading or lagging and DPF See section 2 4 5 Power Factor Calculation for a more detailed description of the power factor calculations 2 4 3 Operation Modes For the majority of time that the LIQ 60 is installed it will simply be monitoring and storing its input values There will be minimal radio communications during this time restricted to periodic status requests from an LIQ Gateway unless initiated by an external device such as a Laptop PC using LIQ LocalLink Should an event such as a power outage occur there will be increased radio communications when the event is detected Normal Operation During normal operation the LIQ 60 continually samples voltage current and temperatures The raw sample points measured at 600Hz for voltage and current are stored in a circular buffer so that once an event is detected the LIQ 60 can look backwards in time and recover pre fault information RMS voltage and current readings are calculated from the raw sample points These RMS values which are updated a
16. ators and remote or on site PC based analysis and control software The LineIQ system links to existing SCADA or Distribution Management systems The CMS communicate with the data collators LIQ Gateways using short range radio The LIQ Gateway and CMS can also communicate with on site PCs e g laptop using short range radio when an LIQ LocalLink is connected to the PC The LIQ Gateways in turn communicate with control rooms via a cellular modem or long range radio links and can use a variety of different communication standards Figure 1 shows a typical implementation of LineIQ monitoring equipment The LIQ 60 CMS detect and store network events and also monitor load currents power factor conductor voltage and ambient and conductor temperatures Events such as faults momentary interruptions sustained interruptions and restorations are radioed to the LIQ Gateway as unsolicited events which in turn are sent on to the SCADA and control centre Ongoing measurements such as load currents conductor voltage and ambient and conductor temperatures are periodically downloaded to the LIQ Gateway which collates the information and sends it to the control centre The LIQ 60s are installed on energised lines They are battery and solar powered for long term continuous monitoring They can be configured and have their firmware upgraded wirelessly using the same license free short range radio link RF link which is used to download data Hence the
17. cular memory overwriting the oldest data so that the latest log data is always retained This does not affect event storage memory 2 4 4 Visual Indicators Visual indications of status and event information are provided by three high intensity LEDs mounted on the base of the LIQ 60 and therefore visible from the ground when the LIQ 60 is installed on an overhead conductor Version 2 11 of 34 May 2012 GRIDSENSE LineIQ User Manual 11039028 Figure 4 LIQ 60 base panel LIQ 60 Status LED During sensing mode this amber LED indicates that the LIQ 60 is powered on by flashing briefly once every 30 seconds At other times start up etc this LED provides other information See Table 1 con page 14 below LIQ 60 Fault LEDs During sensing mode these red LEDs indicate that the LIQ 60 has sensed a fault in the overhead conductor These LEDs also have other functions See Table 1 on page 14 below Both Fault LEDs will operate in parallel Future upgrades will provide for fault direction indication Commissioning Status After an LIQ 60 is powered up it must be configured and commissioned before it becomes active In order to allow easy site installation by line crews without access to LineMan software LIQ 60s are provided with an auto commission feature An auto commission is performed one hour after an LIQ 60 is powered up This period is indicated by a slow one second flashing of both red LEDs Version 2 12 of 34 May 2012
18. dicates net energy flow is from load back to the source Positive phase angles indicate current is leading voltage capacitive load and negative phase angles indicate current is lagging voltage inductive load Displacement vs True Power Factor Displacement Power Factor DPF is defined as cos where is the phase angle between fundamental 50 60Hz voltage and current waveforms whereas True Power Factor TPF is defined as the ratio of Real Power in watts to Apparent Power in VA In the case of sinusoidal waveforms DPF TPF however they are no longer equal for non sinusoidal waves such as those containing harmonics The LIQ 60 measures DPF thus consider harmonic content before inferring the TPF from LIQ 60 readings With normal levels of harmonic content on typical power lines the difference between DPF and TPF is small and usually will be negligible however if you suspect high harmonic content a harmonic study should be performed if Knowledge of TPF IS critical Version 2 15 of 34 May 2012 GRIDSENSE LineIQ User Manual 2 4 5 2 Defining Load and Source Directions To determine how to correctly record power factor the LIQ 60 needs to know which way it is mounted on the power line i e which direction is towards the source and which is towards the load Under most conditions with a single generation source this will be easy to define In the case of power lines with multiple generation sources you must choose which direc
19. e the detection of this type of event 3 High Current 3 when the current exceeds a fixed absolute value Contact your nearest GridSense support centre for further information 4 High Current 4 when a rapid change in current exceeds a selected delta value In other words when the difference between normal and detected current exceeds a selected value Contact your nearest GridSense support centre for further information Loss of Power 6 Power Return Version 2 10 of 34 May 2012 ORIDSENSE LineIQ User Manual When an event is detected the LIQ 60 commences a one minute Event Profile Recording Period The event detection is re triggerable so the event profile recording period can be extended should a higher priority event occur For example if a Power Return is detected within one minute after a Loss of Power then the event profile recording period is started again so that the event profile recording period will be longer than one minute If a high current is then detected the event profile recording period will again be extended Event Recording Event Mode The LIQ 60 enters Event Mode when one of the Event Triggers mentioned above occurs Hieh Current trigger characteristics If the event profile recording period commences with a high current trigger the LIQ 60 also records snapshots of the voltage and current waveforms Each of these snapshots is 200 ms long corresponding to 10 cycles for a 50 Hz suppl
20. elect the number of the group that the LIQ 60 is in from the Group Number field Select the Position Number of the conductor that the LIQ 60 is on e g 1 Phase A 2 Phase B etc Enable Load Logging Enable Fault Detection Event recording Enable Power Factor Logging Should the user select No the CMS will return only instantaneous data rather than logged readings Enable Temperature Logging Select data polling interval log average in minutes Selecting a higher polling rate will decrease the log capacity as the available memory will reduce However the most recent data is always retained 2 Click Apply Configuration to apply any configuration changes 3 Click on Save Config Profile to Disk to save the config settings Version 2 29 of 34 May 2012 GRIDSENSE LineIQ User Manual A 6 CMS Data Download 1 Click the Data Download tab button on the LineTracker Command windowpane The Read All Window pane will pop up The user can choose to download either Event Data or both Events and Load Logging Data Select the required option and click on Next to proceed Read All Data Event Data Only Download trigger based event data This includes Fault waveforms where available iv Both Event Data amp Load Logging Data Download all available Event and Load Logging Data fram the Line Tracker Cancel Figure 13 Data Download Option 2 Save the data file to the preferred location as prompted by the windo
21. ement Power Factor DPF values at the Log Average interval This logged information is downloaded on demand to an LIQ Gateway unit which periodically requests data from all the LIQ 60s that are part of its LIQ LAN Version 2 7 of 34 May 2012 ORIDSENSE LineIQ User Manual 2 4 1 LIQ 60 Design The LIQ 60 uses a sprung clamp to attach to bare conductors between 5mm u lt and 32mm 1 in diameter It is designed to be mounted on the line by using a hot stick as commonly used by electricity utilities The LIQ 60 is powered by a sealed lead acid battery which provides continuous long term power for remote reporting of events and historic load data A solar panel mounted on top of the LIQ 60 charges the battery 2 4 2 LIQ 60 Sensing The LIQ 60 measures conductor current conductor voltage ambient and conductor temperature and calculates Displacement Power Factor Current Current is sensed with a Rogowski coil which is automatically closed around the conductor during the installation process The inherent nature of a Rogowski coil which does not have a magnetic core means that the coil does not saturate allowing the LIQ 60 to measure currents over a wide dynamic range from 1 A up to 25 kA Voltage Two options are available Standard option the standard out of the box LIQ 60 measures voltage by sensing the capacitive current which flows between the LIQ 60 body and ground earth This capacitance varies with atmo
22. f kr m l n a a a a a a al 22 6 1 Bee SUM EI ONA Em m e 22 6 1 1 S iz W OMe sed aa tn kan ek tn ie ka cin nec kn kn n tate ne e to a n ke ko fool an tata ie 22 6 1 2 yule KL AA N fk en ti t cas E ia w ta eta a a a a at ki ak et ki ca ati kak taba rite kaf 22 6 1 3 Pos giri A NON e CE KE vayan vet aa it wan OT Tm 22 6 1 4 ROMOV A kos ga EP 23 EE ROW SYST M E A E E l ar na al t a lak l a n a a at n a je a e e a a a a 23 7 1 LIO BANE 23 7 2 eied n TTT 23 7 2 1 oolar Panel ONGNTA NON f s aie y s thes soli an vote yada v cout PEE amice f k ucc p Se vado pi Sase oo subs UP Hue nor iik 23 7 2 2 Adjusting the solar panel on the LIO 60 eee 25 Version 2 Hi May 2012 GRIDSENSE LineIQ User Manual Appendix A ICI ine kt b a a a kk a a a a m fl ka M 26 A 1 LINEMAN e lt 26 A 2 Setting up an LIQ Locallink anise nce st bot sink kit li ka n kal ka n ni a ina ri ep n eti m si 26 A 3 Connecting to the CMS with LINEMAN esse eee eee eee 27 AA Displaying LIQ 60 SIatis SUMIMALY aac l aj p rate ko e aka e a p Un Cua kab Sb oet ava pe NE de k 27 FS Configuring an LIQ GO mM 29 A OMS Data DOWN ONA MN TREAT ENT 30 Appendix B Window XP Installation kaka aaa enesenn eenn neee 31 PSN C eke DP ae in kin a al k e ein id ree e ke a e n e a a e este a e e l e e a ak al ai a n n n ba E
23. for technical reasons this does not provide coverage in a specific area other modems that are supported by GridSense can be used Event data is transferred to the LIQ Gateway shortly after capture by the CMS devices Load log data conductor current voltage conductor and ambient temperatures and power factor is requested by the LIQ Gateway from the CMS at regular user selected intervals In addition a system Health Check at a user defined interval is initiated by the Gateway independently of events The Gateway initiates communications with each CMS to download all log data and health records battery voltage solar charge current etc to the Gateway memory This information can be remotely accessed via LineMan Remote or accessed by SCADA The LIQ Gateway can be AC or battery solar powered depending on power requirements and the availability of mains power Power consumption is minimised by powering up the communication systems i e LIQ LAN and cellular modem or utility radio only when required The LIQ Gateway has a combined connector indicator panel This comprises connectors for AC mains and solar power input an Ethernet connector radio antenna and cellular antenna and two LEDs used as visual status indicators Version 2 17 of 34 May 2012 GRIDSENSE LineIQ User Manual 2 6 LIQ LocalLink Overview The LIQ LocalLink is a licence free radio modem that plugs into a USB port on a laptop or PC It uses the IEEE 802 15
24. fornia is at approximately 40 N So the angle from horizontal for the face of the solar panel is 40 15 55 See Figure 8 Horizontal Figure 8 Angle of solar panel from horizontal Version 2 24 of 34 May 2012 ORIDSENSE LineIQ User Manual 7 2 2 Adjusting the solar panel on the LIQ 60 The solar panel has 2 separate adjustments that need to be made 1 Rotation of the solar panel and its mounting to face toward the equator and Setting the panel s angle relative to the horizontal Rotating the solar panel to face the equator a Determine the direction that the solar panel must face i e north in the southern hemisphere or south in the northern hemisphere b Hold the LIQ 60 upright and oriented so that the channel that the power conductor will fit into is lined up with the direction of the conductor overhead that it will be installed on c Rotate the solar panel so that it faces the determined direction The circular base of the solar panel adjusts in pre set steps of 12 Note In order to avoid twisting the panel s cable the base has a stop which prevents it from being rotated in a complete circle If it jams against this stop before reaching the required angle rotate it in the opposite direction 2 Setting the panel s angle relative to the horizontal a Determine the angle with the horizontal that the solar panel needs to be set to i e latitude 15 b Hold the LIQ 60 upright and adjust the
25. in Width 140mm 5 5 in Environmental Ambient operating range 40 C to 70 C 40 F to 160 F 20 C to 65 C 49F to 120 F 40 C to 130 C 40 F to 265 F 20 C to 909C 49F to 195 F Range for accuracy Conductor operating range Conductor guaranteed accuracy 0 to 100 Yo 34 of 34 May 2012
26. k after leaving and returning to the worksite As a minimum this hazard assessment should e Identify possible hazards and risks e Identify the safety needs of the job e Identify the correct procedures practices and equipment e Eliminate unsafe conditions and actions from the worksite e Identify the need for personal protective equipment e Inspect equipment before use Prior to using an LIQ Gateway you should check the following e The sheaths of all cables are secured and undamaged e Plugs and connectors are properly connected and serviceable e There should also be an ongoing risk assessment during the job 1 2 Working on energised conductors and equipment For the correct and safe use of this equipment it is essential that all operating personnel follow appropriate safety procedures Check your employer or relevant regulatory body s rules for working with energised equipment 1 3 Equipment safety The LIQ Gateway and associated equipment should be maintained and regularly tested to make sure the equipment is in good order Version 2 1 of 34 May 2012 ORIDSENSE LineIQ User Manual 2 INTRODUCTION TO THE LINEIQ DEVICE FAMILY The LineIQ monitoring system allows electricity utilities and other operators of high and medium voltage overhead conductor distribution and transmission lines to monitor and respond to faults and load changes on the supply grid The monitoring system consists of Conductor Mounted Sensors CMS data coll
27. mber 3 1 2 For Microsoft Windows XP Please refer to Appendix B for Windows XP installation Version 2 19 of 34 May 2012 ORIDSENSE LineIQ User Manual 3 2 LIQ 60 setup Before the LIQ 60 is configured its battery needs to have sufficient charge The LIQ 60 is delivered with a fully charged battery but it will discharge during storage The battery voltage can be determined with LineMan Run the LineMan software application and scan for all LIQ 60 CMS within range Available devices will be displayed under the Line Tracker Information window Click on the device interest and click on Summary If the battery voltage is less than 2 0V then it should be charged before installation It is recommended that you use a GridSense LIQ Charger Alternatively the battery can be charged using the LIQ 60 solar panel However charging a completely flat battery may require optimal sunlight for up to 50 hours 3 2 1 Switching on the LIQ 60 The LIQ 60 s power switch is located on the bottom panel It is a rotating switch that turns through 90 degrees between the OFF and ON positions as indicated by arrows 1 Rotate the switch clockwise to the ON position In the ON position it will be in line with the 2 red fault indicating LEDs When the unit is powered on the red and amber LED s will start a flash sequence The red LED will flash 8 times followed by 8 flashes from the amber LED After the start up sequence the red LEDs will illuminate
28. once every second indicating that the unit is in a non sensing state awaiting commissioning Prior to commissioning the amber LED will flash 3 times every 30 seconds If after one hour the LIQ 60 has not been manually commissioned it will commission itself automatically Refer to Table 1 on page 14 for an explanation of LED status and fault indication sequences Version 2 20 of 34 May 2012 ORIDSENSE LineIQ User Manual 4 CONFIGURATION Before the LIQ Gateway and LIQ 60s are mounted and commissioned they need to be configured Configuration of the LIQ 60 and the LIQ Gateway is performed using LineMan and an LIQ LocalLink 4 1 LIQ 60 configuration The LIQ 60 is configured using LineMan software Please refer to Appendix A for instruction on configuring the LIQ 60 with the LineMan software Commissioning LIQ 60s must be commissioned after configuration 5 COMMISSIONING 5 1 Commissioning the LIQ 60 If the LIQ 60 is intended to operate stand alone without an associated LIQ Gateway it needs to be commissioned directly using a laptop PC and an LIQ LocalLink local RF radio with the LineMan software interface If the LIQ 60 is associated with an LIQ Gateway the LIQ 60 is then commissioned via the LIQ Gateway 5 1 1 Pre commissioning check of the LIQ 60s Using a laptop running LineMan connect to each LIQ 60 Confirm that e The internal battery voltage exceeds 2V e There is some solar charge current when the solar
29. panel is illuminated e Event recording is enabled if required e Load logging is enabled if required e Line currents are as expected e Voltage sensor values are as expected e The appropriate LIQ Gateway if used has been assigned as a parent to the LIQ 60 e The correct phase and group have been assigned e Location infomation has been entered Version 2 21 of 34 May 2012 ORIDSENSE LineIQ User Manual 6 INSTALLATION AND REMOVAL When installing or removing the LIQ 60 if using a hot stick use only a hot stick rated for use at or above the voltage of the conductor on which the LIQ 60 is installed Similarly if using the glove and barrier method ensure that the safety equipment used is rated at or above the voltage of the conductor on which the LIQ 60 is installed 6 1 LIQ 60 installation The LIQ 60 has been designed for live line installation on Medium and High Voltage MV and HV networks up to 138 kV using an electric utility hot stick or using a glove and barrier method with a live line crew These instructions apply to installation using a hot stick Each LIQ 60 takes just a few minutes to install 6 1 1 Pre installation Prior to mounting set the orientation of the LIQ 60 s solar panel to maximise sunlight falling onto it See section 72 Solar Panels for details on determining the direction and angle at which to mount the solar panel 6 1 2 Mounting Ensure that the LIQ 60 is switched on and configured
30. re is no need to remove the LIQ 60s from the conductors after they have been installed LIQ Gateways function as Remote Terminal Units RTUs and are mains powered or battery solar powered depending on location and supply availability Transmission of load log data from the LIQ 60 to the LIQ Gateway occurs during a status check which is periodically initiated by the LIQ Gateway This data is then transmitted by the LIQ Gateway to the remote monitoring system e g SCADA or is accessed on demand using LineMan or SCADA via a variety of supported protocols for example DNP3 IEC 61850 or Web services Version 2 2 of 34 May 2012 Oo I m sjueuoduio OSU JO uonequeuirojduug je id j T sunbi4 a O E edejjaju Jasn peseg 1soH JO J8 O2 Josuas E EM cE ELDLLWLeIL4LIeEELIDCLLSIE4LIDCGALILIOILIEE Ecc PL om se I Leena hes Lee umi d mia Q m ES egi V umi Y auia V Mis Cam Jo uaa io ums Y amis S tima v ET d e uonpeuuo ZEZSY 179 10 id ajowsy ueyaun poday i pra di jo ZEZ Y T 101044 vas o paos 7 09 Dn joool0Jd OvdS BA dnouc 33 1noJ dnois JanJas dj ae coq ES Ode diJO ZEZSY aSUIPNI 3 I S g tv s f FO a ud Fi RE A E om GAGIS S Jajsew vaYIs Se 340034 dNQO ey se dNG Gyuog je007 pajojosuf Jo mp ed pani os dl 10 ZE Z SN UONIBULOD ZEZSY 179710 Au yevor em uj e U Seas 09Dr1 uewoun rJ 72H59 v c momen
31. rmanently on At the end of the firmware upgrade process the LIQ 60 will restart Version 2 13 of 34 May 2012 GRIDSENSE The LIQ 60 s LED indicator flash patterns The LEDs are also used to indicate other operational statuses The various flash patterns are summarised in Table 1 Indication Line status Fault detected 1 red LED on side of fault Ready for installation commission ing Firmware upload CPU upgrade Version 2 LIQ 60 LED Flash patterns Amber LED 1 2 or 3 flashes repeated every 30 sec Red LED 1 2 or 3 flashes repeated every 10 sec Both Red LEDs flash once every sec amp Amber LED triple flash every 30 sec Either Amber or both Red LEDs Fast flash 10Hz Amber or all 3 LEDs single 9 double triple single double triple single triple very rapid very rapid steady steady LineIQ User Manual Meaning Voltage and Current present Voltage but no Current No Voltage and no Current FP self clearing fault sensed FP SI transient fault sensed with short interruption FP LI permanent fault sensed with long interruption LIQ 60 awaiting commission Auto commission will occur within 1hr of start up or reset if not done manually Amber LED is indicating LIQ 60 is not sensing Voltage or Current Firmware upload into buffer in progress Error during firmware upload into buffer
32. rocesses Fault current detected with no loss of supply during the event profile recording period The process of setting up equipment to perform a designated task In this manual refers mainly to hardware and installation usually precedes configuration Short Interruption brief less than one minute loss of power on the conductor Sealed Lead Acid Battery The power storage for the LIQ 60 and LIQ Gateway 5 of 34 Term Slow Filter TPF Transient Fault LineIQ User Manual Meaning A 10 day non linear average reflecting the highest value of current and voltage over the weekly load cycle True Power Factor The ratio of the real power flowing to the load to the apparent power in the circuit Fault detected with a loss and return of supply seen during the event profile recording period May 2012 ORIDSENSE LineIQ User Manual 2 2 Implementation Scenarios A possible implementation scenario is shown in Figure 2 This is a permanent configuration used for continuous monitoring of power lines using LIQ 60s LIQ Gateways and LineMan communications software Communications W Cellular Radio WiFi LinelQ Control Center Cloud based or locally hosted Figure 2 An installation of GridSense devices as part of a permanent monitoring configuration 2 3 System Functionality With regards to communication among the components in the LineIQ family the LIQ 60s and the LIQ Gateway
33. rt number to set up communications between LineMan and the LIQ LocalLink Version 2 32 of 34 May 2012 ORIDSENSE LineIQ User Manual 4 On the Windows task bar click the Start button then select Control Panel gt System Device Manager K Device Manager ac x File Action View Help Hee ZW m 4 ENG 3PHASEJIG X Computer S Disk drives a Display adapters DVD CD ROM drives T 4 Floppy disk controllers Floppy disk drives ig Human Interface Devices 3 IDE ATA ATAPI controllers ie Keyboards Mice and other pointing devices 72 Monitors B Network adapters Y Ports COM amp LPT F Communications Port COM1 9 Communications Port COM2 a USB Serial Port COM3 Z Sound video and game controllers E System devices v gt Figure 18 Device Manager showing USB serial COM port number In the example above the USB serial port is COM port 3 An LED inside the LIQ LocalLink s translucent casing flashes about once a second to indicate it is powered up Version 2 33 of 34 May 2012 GRIDSENSE Appendix C LineIQ User Manual C 1 LIQ 60 specifications Application Medium V High V overhead distribution network sensing and measurement 4 wire multiple grounds 3 wire single phase SWER and mixed circuit installations Item Communication Status indicators Line voltage Frequency Current sensor Trigger principle Memory
34. ructions from Windows Install to install the driver 3 Once the driver is installed you can run LineMan Version 2 26 of 34 May 2012 GRIDSENSE LineIQ User Manual A 3 Connecting to the CMS with LineMan Click on the Start All Programs Gridsense LineMan LineMan to launch the LineMan application Select the correct COM port as indicated by the LineMan Connection Window and click on Connect to LineTracker 1 GridSense Figure 9 COM port selection 3 The available LIQ 60 within the RF range is displayed under the LineTracker ID List differentiated by their respective serial number Melancholy ecstatic A 4 Displaying LIQ 60 Status Summary 1 Check the LIQ 60 of interest and click on Summary to display information such as firmware revision software revision and thresholas LineMan LIQ60 1 9 4 0 File Devices Commands Tools Help dik Scan for Devices Locate Add Clear Clear All Line Tracker ID List SOS LILIBO FLF Print Status Summary dX Device Config Figure 10 Device List Version 2 27 of 34 May 2012 GRIDSENSE LineIQ User Manual Line Tracker ID List w 11033053 LIGIBO FLP 777 Print Status i i dX Device Contig Line Tracker Information Device Seral Number 11039053 DAL Firmware Version version 15 23 DAL Hardware Revision Revision 25E Current Calibration Coeff Hi 0 04 Current Calibration Coeff B 0 323 Temp Ambient Cal Coetts M 0 20
35. sioned and reading voltages and current 4 Check that the status LEDs are showing correct status both red LEDs flashing every second and a status amber flash every 30 sec if not yet commissioned or an amber flash every 30 sec when commissioned and reading voltages and current Version 2 22 of 34 May 2012 ORIDSENSE LineIQ User Manual 6 1 4 Removal 1 Clamp a hot stick hook onto the sprung slider and pull the slider into the head of the hot stick This opens the LIQ 60 s conductor clamp and the sensing coil 2 Remove the LIQ 60 by lifting it slightly so that the conductor slides out of the channel in the LIQ 60 s housing 3 Lower the LIQ 60 carefully then disengage the hot stick 7 POWER SYSTEMS 7 1 LIQ 60 Battery The LIQ 60 is powered by a sealed lead acid battery which provides continuous long term power for remote reporting of events and historic load data A solar panel mounted on top of the LIQ 60 charges the battery The LIQ 60 is delivered with a fully charged battery but it will slowly discharge during storage The battery voltage can be determined by using LineMan See Appendix A If the battery voltage is less than 2 0V then it should be charged before installation It is recommended that you use a GridSense LIQ Charger Alternatively the battery can be charged using the LIQ 60 solar panel However charging a flat battery may require optimal sunlight for up to 50 hours The battery has a voltage of 2V and
36. spheric conditions temperature humidity air pressure rain snow etc and also with the physical arrangement of the LIQ 60 and nearby grounded earthed structures and energised conductors This means that it is not possible to make accurate voltage measurements The LIQ 60 therefore scales the voltage measurements so that a reading of 100 corresponds to the normal energised conductor voltage High accuracy the second option is to purchase a voltage sensor from GridSense which connects electrically and mechanically between the LIQ 60 and an earth point This enables an accurate reading of the line voltage Temperature Conductor and ambient temperatures are sensed using platinum resistance thermometers PRT One PRT is automatically placed in contact with the overhead conductor when the LIQ 60 is installed Ambient temperature is measured using a shaded PRT mounted on the upper part of the LIQ 60 housing Temperatures are sampled regularly then averaged and recorded at the Log Average Interval Version 2 8 of 34 May 2012 GRIDSENSE LineIQ User Manual Power Factor The voltage and current data are low pass filtered to eliminate harmonic information and then the zero crossings of the voltage and current signals are detected and processed over a one minute period This allows calculation of the phase angle of the current with respect to the voltage The sign of phase angle measurements are taken into account so that the measurements c
37. t the supply frequency 50Hz or 60Hz are used as inputs to the event detection algorithm If load logging is enabled the current readings are averaged and stored at the end of each Log Average period The voltage and current readings are processed by Fast Filters to provide input signals for the event detection algorithm in addition to the per cycle values The outputs of the voltage and current Fast Filters are further filtered by non linear Slow Filters These filters have a decay time constant of approximately 10 days but a much faster attack time constant The output of the Slow Filters provides a good representation of the normal conductor load profile The Slow Filter outputs also provide inputs to the event detection algorithm Average conductor and ambient temperatures as well as phase angle and power factor data are stored at the Log Average interval Version 2 9 of 34 May 2012 ORIDSENSE LineIQ User Manual Event Classification LIQ 60s incorporate a sophisticated event detection algorithm which analyses voltage and current data and reports the following activity occurring on the conductor e Fault Path FP a high current event e Short Interruption SI a brief less than one minute loss of power on the conductor e Long Interruption LI a loss of power on the conductor for at least one minute e Power Return PR return of power after a Long Interruption LI Some of these activities can occur
38. tion to call the source and which the load LineMan provides an interface to set the load direction of the LIQ 60 as determined by the direction of the reference arrow on the bottom of the LIQ 60 Field Calibration Compensating for Effects of Adjacent Conductors The LIQ 60 does not normally have a ground reference so it uses the electric field created between the line and ground to establish the voltage zero crossing This field can be skewed by adjacent conductors so LineMan provides a wizard to compensate for those effects The wizard is run once for each set of 3 LIQ 60s on a single feeder It cannot be run on a single LIQ 60 Version 2 16 of 34 May 2012 ORIDSENSE LineIQ User Manual 2 5 LIQ Gateway Overview The LIQ Gateway is an intelligent Remote Terminal Unit RTU used in conjunction with the LIQ 60 conductor mounted sensor The Gateway collates events and enables remote unsolicited fault and outage event reporting for network reliability applications It provides detailed fault profiles for fault location analysis modelling and scenarios as well as system load information for planning line balancing and asset utilisation applications The Gateway is a pole attached collator mounted within radio range of the CMS and can be integrated into remote SCADA system via DNP3 IEC 61850 or Web services protocols Communication with external systems is usually achieved using a GridSense supplied communication module If
39. together For example an LIQ 60 mounted on a conductor upstream i e on the generator side of a fault which results in a permanent outage will report a FP LI event whereas an LIQ 60 mounted downstream i e on the load side of that fault will report a LI event only because it will not see the fault current After power is restored both LIQ 60s in this example will report a PR event A second common example is where the system protection recloser operates and clears the fault In this case the LIQ 60 upstream of the fault will report a FP SI event whereas an LIQ 60 downstream of the fault will report a SI only Since power has only been briefly interrupted a PR event will not occur Power Status The LIQ 60 event detection algorithm analyses the Power Status of the conductor as follows e If the previous Power Status is OFF then the Power Status changes to ON if either voltage OR current is PRESENT e If the previous Power Status is ON then the Power Status changes to OFF if both voltage AND current are ABSENT Event Triggers An Event commences when one of the following trigger occurrences is detected 1 High Current 1 at least 2 cycles of current that are more than twice the normal conductor load profile accompanied by a 25 change reduction or increase of the voltage 2 High Current 2 at least 2 cycles of current that are more than 5 times the normal conductor load profile The voltage reading does not influenc
40. w The user can monitor the download progress from the task bar The status will change to Done for a successful download Click on Finish to close the Read All Data window Read All Data d Preparing LineT racker d Retneving calibration information T dl Retrieving Time vd Hetrieving Device Configuration Hetrieving Event Information 11033053 LIQ60 FLP does nat contain any event datal Hetrieving Load Logging 19659 bytes to download Cancel Retry D Oof 16 bytes Li Figure 14 File Download Version 2 30 of 34 May 2012 GRIDSENSE LineIQ User Manual Appendix B Window XP Installation The driver for the LIQ LocalLink is provided on the LineMan installation CD ROM The driver can also be downloaded from the Digi website on their web page for the XStick USB 802 15 4 at www digi com support productdetl isp pid 3564810Ssvid 085 4448tp 1 To install by running the driver file 1 From the CD ROM or downloaded driver file run the file CDM20600 exe 2 Install the driver as per the Windows installation wizard select No not this time on the 1 screen Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on pour computer an the hardware installation CD or on the Windows Update Web site with your permission Head our privacy policy Can Windows connect to Windows Update to search for soft
41. ware CO Yes this time only CO Yes now and every time connect a device O No not this time Click N est ta continue Back N evt gt Figure 15 Windows XP driver installation dialog screen 1 3 At the next screen insert the CD ROM and select Install the software automatically Version 2 31 of 34 May 2012 GRIDSENSE LineIQ User Manual Found Kew Hardware Wizard This wizard helps you install software for tick fe If your hardware came with an installation CD lt or floppy disk insert it now What da pou want the wizard to da 5 Install the software automatically Recommended Install from a list or specific location Advanced Click Next ta continue Figure 16 Windows XP driver installation dialog screen 2 The wizard will look for the driver and install it Follow the steps until the wizard completes Found Kew Hardware Wizard Completing the Found New Hardware Wizard The wizard has finished installing the software for LISE Senal Converter Click Finish to close the wizard Back Cancel Figure 17 Windows XP driver installation dialog screen 3 Note Depending on setup this may be a 2 step process the 1 wizard installing an XStick as a USB serial convertor then the 2 Wizard installing a USB serial port The COM port on the PC that the LIQ LocalLink is assigned to can be determined as follows you will need to know the COM po
42. y and 12 cycles for a 60 Hz supply The trigger point is set at 60 ms so the first 60 ms of each record is the pre event waveform and the final 140 ms are the post event waveforms Characteristics for all triggers For the full length of the event profile recording period at least one minute the LIQ 60 records a current profile An initial current value is recorded along with its time of occurrence The current is then monitored on a cycle by cycle basis If the current changes by more than 5096 a new current and its time of occurrence is recorded This process continues until the end of the event profile recording period This recording method allows a detailed time plot of the conductor current to be constructed This plot has sufficient detail to enable the sequence of current changes caused by recloser operation to be reconstructed The LIQ 60 also stores time stamped changes in power status which allows a time plot of power status to be constructed Types of Faults e Self Clearing Fault A High Current trigger occurred but Power remained unchanged e Transient Fault A High Current trigger occurred and Power goes OFF briefly but is restored before the end of the Event Profile Recording Period e Permanent Fault A High Current trigger occurred and Power goes OFF and remains OFF at the end of the Event Profile Recording Period LIQ 60 Load Log retention in memory If the load log memory fills up it operates as a cir
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