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PQMII POWER QUALITY METER – INSTRUCTION MANUAL

CHAPTER 1: OVERVIEW

1.6.9

Physical

PACKAGING

Shipping box: ..............................................8½”

6”

6” (L

21.5cm

15.2cm

15.2 cm

Ventillation:

No special ventilation required as long as ambient

temperature remains within specifications.

Ventilation may be required in enclosures exposed to

direct sunlight.

Cleaning:

May be cleaned with a damp cloth.

Содержание PQMII

Страница 1: ...1601 0118 AD Manual Order Code GEK 106435M Copyright 2010 GE Multilin GE Multilin 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 Internet http www GEmultilin com...

Страница 2: ...the property of GE Multilin Inc This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin The content of this manual is for informa...

Страница 3: ...12 ORDER CODES 1 13 ORDER CODE TABLE 1 13 MODIFICATIONS 1 13 ACCESSORIES 1 13 CONTROL POWER 1 13 SPECIFICATIONS 1 14 INPUTS OUTPUTS 1 14 TRACE MEMORY TRIGGER 1 15 SAMPLING MODES 1 15 OUTPUT RELAYS 1...

Страница 4: ...A DEFAULT MESSAGE 3 8 DELETING A DEFAULT MESSAGE 3 8 DEFAULT MESSAGE SEQUENCE 3 9 4 SOFTWARE INTRODUCTION 4 1 OVERVIEW 4 1 HARDWARE 4 2 INSTALLING THE ENERVISTA PQMII SETUP SOFTWARE 4 3 CONFIGURING S...

Страница 5: ...ALOG OUTPUTS 5 21 ANALOG INPUT 5 25 SWITCH INPUTS 5 27 PULSE OUTPUT 5 28 PULSE INPUT 5 29 DATA LOGGER 5 30 VOLTAGE DISTURBANCE 5 30 S3 OUTPUT RELAYS 5 32 DESCRIPTION 5 32 ALARM RELAY 5 32 AUXILIARY RE...

Страница 6: ...INTERFACING USING HYPERTERMINAL 7 8 UPGRADING FIRMWARE 7 8 CYCLING POWER 7 8 HYPERTERMINAL 7 8 PHASOR IMPLEMENTATION 7 11 THEORY OF PHASOR IMPLEMENTATION 7 11 TRIGGERED TRACE MEMORY 7 13 DESCRIPTION 7...

Страница 7: ...TILIN DEVICE WARRANTY 8 1 WARRANTY STATEMENT 8 1 APPENDIX A MOD 506 CAPACITOR BANK SWITCHING A 1 DESCRIPTION A 1 SETPOINTS A 1 ACTUAL VALUES A 3 CONDITIONS REQUIRED TO ENERGIZE A STEP A 4 ADDITIONS TO...

Страница 8: ...TOC VI PQMII POWER QUALITY METER INSTRUCTION MANUAL TABLE OF CONTENTS...

Страница 9: ...ce for plant automation systems that integrate process instrument and electrical requirements all monitored values are available via one of two RS485 communication ports running the Modbus protocol If...

Страница 10: ...ons Three COM ports two rear RS485 ports and one front RS232 port for access by process electrical maintenance and instrument personnel Harmonic analysis for power quality review and problem correctio...

Страница 11: ...elays Four 4 transducer outputs 4 3 2 1 COM 2 RS232 PORT COM 1 Four switch inputs for control 4 to 20 mA Alarm control Instrumentation Electrical Maintenance Main SCADA Three phase 3 4 wire bus CTs VT...

Страница 12: ...1 4 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 1 OVERVIEW FIGURE 1 2 Feature Highlights...

Страница 13: ...a simple and easy to understand English format 1 2 3 Communications The PQMII is equipped with one standard RS485 port utilizing the Modbus or DNP protocols This can be used to integrate process inst...

Страница 14: ...ts via the Serial Port 1 2 5 Open Architecture PQMII units can initially be used as standalone meters Their open architecture allows connection to other Modbus compatible devices on the same communica...

Страница 15: ...neous monitoring by process instrument electrical or maintenance personnel FIGURE 1 4 Additional Communication Port 1 3 2 Control Option An additional three dry contact form C output relays and four d...

Страница 16: ...n cause unwanted harmonics that may lead to nuisance breaker tripping telephone interference and transformer capacitor or motor overheating For fault diagnostics such as detecting undersized neutral w...

Страница 17: ...notches from SCR switching provide clues for taking corrective action FIGURE 1 7 Captured Waveform Alarms triggers and input output events can be stored in a 150 event record and time date stamped by...

Страница 18: ...asured quantities can be created saved to a file and or printed For additional information on waveform sampling and analysis features see Power Analysis on page 4 13 The power analysis option also pro...

Страница 19: ...CHAPTER 1 OVERVIEW PQMII POWER QUALITY METER INSTRUCTION MANUAL 1 11 FIGURE 1 9 Trace Memory Capture...

Страница 20: ...Some of the tasks that can be executed using the EnerVista PQMII Setup Software package include reading metered data monitoring system status changing PQMII setpoints on line saving setpoints to a fil...

Страница 21: ...s GE MultiNET RS485 serial to Ethernet converter required for connection to an Ethernet network RS485 terminating network 1 5 4 Control Power 90 to 300 V DC 70 to 265 V AC standard 20 to 60 V DC 20 to...

Страница 22: ...Ratio 1 1 to 3500 1 Burden 2 2 M Input Range 40 to 600 V AC Full scale for VT input 150 V AC 150 V AC for VT input 150 V AC 600 V AC Frequency up to 32nd harmonic Accuracy 0 2 of full scale SWITCH IN...

Страница 23: ...ll scale 1 6 3 Sampling Modes METERED VALUES Samples per cycle 64 Inputs sampled at a time all Duration 2 cycles TRACE MEMORY Samples per cycle 16 Inputs sampled at a time all Duration continuous HARM...

Страница 24: ...0 4 of full scale MEASURED VALUES RANGE Voltage 20 to 100 of VT Current 1 to 150 of CT Voltage unbalance 0 to 100 Current unbalance 0 to 100 Real power 0 to 999 999 99 kW Reactive power 0 to 999 999...

Страница 25: ...OWER FACTOR MONITORING Req d voltage 20 V applied in phase A Pickup 0 50 lag to 0 50 lead step 0 01 Dropout 0 50 lag to 0 50 lead step 0 01 Time delay 0 5 to 600 0 s in steps of 0 5 Timing accuracy 0...

Страница 26: ...ended that the PQMII be powered up at least once per year to avoid deterioration of the electrolytic capacitors in the power supply FUSE TYPE RATING 5 20mm 2 5 A 250V Slow blow High breaking capacity...

Страница 27: ...heat IEC60068 2 2 70C 16hrs Relative Humidity Cyclic IEC60068 2 30 6day variant 2 EFT IEEE ANSI C37 90 1 4KV 2 5Khz Damped Oscillatrory IEEE ANSI C37 90 1 2 5KV 1Mhz Altitude 2000m max Pollution Degr...

Страница 28: ...ical PACKAGING Shipping box 8 6 6 L H D 21 5cm 15 2cm 15 2 cm Ventillation No special ventilation required as long as ambient temperature remains within specifications Ventilation may be required in e...

Страница 29: ...ration 2 1 1 Mounting Physical dimensions and required cutout dimensions for the PQMII are shown below Once the cutout and mounting holes are made in the panel use the eight 6 self tapping screws prov...

Страница 30: ...able when contacting GE Multilin for technical support Version An internal GE Multilin number that should be available when contacting us for technical support Serial No Indicates the serial number in...

Страница 31: ...given in the sections that follow Table 2 1 PQMII External Connections Terminal Description Terminal Description VT Control Power Row 1 to 8 25 Analog out 4 1 V1 Voltage input 26 Analog out 3 2 V2 Vo...

Страница 32: ...AL CHAPTER 2 INSTALLATION Signal Upper Row 21 to 51 47 Comm 1 21 Analog shield 48 Comm 1 22 Analog in 49 Comm 2 COM 23 Analog in 50 Comm 2 24 Analog out com 51 Comm 2 Table 2 1 PQMII External Connecti...

Страница 33: ...AL 2 5 2 2 2 Wiring Diagrams This wiring diagram below shows the typical 4 wire wye connection which will cover any voltage range Select the S2 SYSTEM SETUP CURRENT VOLTAGE CONFIGURATION VT WIRING 4 W...

Страница 34: ...re cost or size restrictions limit the number of VTs to two With this connection Phase Vbn voltage is calculated using the two existing voltages Select the S2 SYSTEM SETUP CURRENT VOLTAGE CONFIGURATIO...

Страница 35: ...CTION MANUAL 2 7 FIGURE 2 4 Wiring Diagram 4 wire Wye 2 VTs Four wire systems with voltages 347 V L N or less can be directly connected to the PQMII without VTs Select the S2 SYSTEM SETUP CURRENT VOLT...

Страница 36: ...METER INSTRUCTION MANUAL CHAPTER 2 INSTALLATION The PQMII voltage inputs should be directly connected using HRC fuses rated at 2 A to ensure adequate interrupting capacity FIGURE 2 5 Wiring Diagram 4...

Страница 37: ...STRUCTION MANUAL 2 9 This diagram shows the typical 3 wire delta connection which will cover any voltage range Select the S2 SYSTEM SETUP CURRENT VOLTAGE CONFIGURATION VT WIRING 3 WIRE DELTA 2 VTs set...

Страница 38: ...less can be directly connected to the PQMII without VTs Select the S2 SYSTEM SETUP CURRENT VOLTAGE CONFIGURATION VT WIRING 3 WIRE DIRECT setpoint The PQMII voltage inputs should be directly connected...

Страница 39: ...CTION MANUAL 2 11 For a single phase connection connect current and voltage to the phase A inputs only All other inputs are ignored Select the S2 SYSTEM SETUP CURRENT VOLTAGE CONFIGURATION VT WIRING S...

Страница 40: ...CT method the third phase is measured by connecting the commons from phase A and C to the phase B input on the PQMII This causes the phase A and phase C current to flow through the PQMII s phase B CT...

Страница 41: ...r with the PQMII wired up Filter Ground Terminal connections must be removed during dielectric testing When properly installed the PQMII meets the interference immunity requirements of IEC 801 and ANS...

Страница 42: ...S ALARM RELAY ALARM OPERATION setpoint The NC COM contacts are normally open going to a closed state on an alarm If Unlatched mode is selected with setpoint S3 OUTPUT RELAYS ALARM RELAY ALARM ACTIVATI...

Страница 43: ...calculation only Setpoint Access The access terminals must be shorted together in order for the faceplate keypad to have the ability to store new setpoints Typically the access terminals are connecte...

Страница 44: ...a 0 to 10 V input to make the 4 to 20 mA output correspond to 2 to 10 V R V I 10 V 0 02 A 500 Current levels are not affected by the total lead and load resistance which must not exceed 600 for the 4...

Страница 45: ...ons interface to the system COM2 which is also a rear RS485 port can be used for data collection printing reports or problem analysis without disturbing the main communications interface COM3 is a fro...

Страница 46: ...tion errors Install the 120 watt terminating resistor and 1 nF capacitor externally Although any standard resistor and capacitor of these values are suitable these components can also be ordered from...

Страница 47: ...ion between relay contacts CT inputs VT inputs control power inputs and Safety Ground Terminal 6 Some precautions are necessary to prevent damage to the PQMII during these tests Filter networks and tr...

Страница 48: ...2 20 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 2 INSTALLATION FIGURE 2 15 Hi Pot Testing 746702A1 CDR 5 PQMII POWER QUALITY METER GE Multilin...

Страница 49: ...equired Indicator LEDs provide important status information at all times An RS232 communications port is also available for uploading or downloading information to the PQMII 3 1 2 Display All messages...

Страница 50: ...e Self Test LED indicator to be on Loss of control power to the PQMII also causes the Self Test LED indicator to turn on indicating that no metering is present 3 2 3 Communicate The Communicate LED in...

Страница 51: ...n the condition clears the Alarm LED indicator turns off If the alarm relay has been programmed as Latched the alarm condition can only be cleared by pressing the RESET key or by issuing a computer re...

Страница 52: ...Continually pressing ESCAPE will return the user back to the main setpoints or actual values page 3 3 4 Enter Key When programming setpoints enter the new value by using the VALUE keys followed by th...

Страница 53: ...T NOT POSSIBLE AUX CONDITION EXISTS Auxiliary LED indicator s and aux relay s remain on because condition is still present Alarm and Aux Relay RESET NOT POSSIBLE AUX CONDITION EXISTS Auxiliary and Ala...

Страница 54: ...e MESSAGE RIGHT key to select successive setpoints pages The page number and page title appear on the second line All setpoint page headers are numbered with an S prefix Actual value page headers are...

Страница 55: ...rotection against unauthorized setpoint changes A numeric access code must be entered to program new setpoints using the front panel keys To enable the setpoint access security feature the user must e...

Страница 56: ...the default message queue and follow the steps shown below When selecting a setpoint message for display as a default do not modify the value using the VALUE keys or the PQMII will recognize the ENTE...

Страница 57: ...SETPOINT TO BE REMOVED FROM THE DEFAULT MESSAGE QUEUE DISPLAYED FOR 3 SECONDS WHEN ENTER KEY AND RESET KEY ARE PRESSED IN SEQUENCE DISPLAYED FOR 3 SECONDS WHEN THE ENTER KEY IS PRESSED REDEFMSG CDR NO...

Страница 58: ...3 10 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 3 OPERATION...

Страница 59: ...le to Program and modify setpoints Load save setpoint files from to disk Read actual values and monitor status Perform waveform capture and log data Perform harmonic analysis Trigger trace memory Get...

Страница 60: ...are to the PQMII can be accomplished three ways RS232 RS485 and Ethernet requires the MultiNET adapter communications The following figures below illustrate typical connections for RS232 and RS485 com...

Страница 61: ...omputer Microsoft Windows 95 or higher operating system 64 MB of RAM 256 MB recommended Minimum of 50 MB hard disk space 200 MB recommended After ensuring these minimum requirements use the following...

Страница 62: ...e PQMII Power Quality Meter from the Install Software window as shown below Z Select the Web option to ensure the most recent software release or select CD if you do not have a web connection Z Click...

Страница 63: ...is desired click on the Start Copying button otherwise Z Click on the CONTINUE WITH PQMII VERSION 1 O1 INSTALLATION button Z Select the complete path including the new directory name where the EnerVis...

Страница 64: ...I POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 4 SOFTWARE Z Click Finish to end the installation The PQMII device will be added to the list of installed IEDs in the EnerVista Launchpad window as sho...

Страница 65: ...t in the EnerVista PQMII Setup Software window Z Click the Add Device button to define the new device Z Enter the desired name in the Device Name field and a description optional of the site Z Select...

Страница 66: ...le on your PC After the firmware has been upgraded it will be necessary to load this file back into the PQMII Z To save setpoints to a file select the File Read Device Settings menu item The EnerVista...

Страница 67: ...QMII will display a message indicating that it is in Upload Mode While the file is being loaded into the PQMII a status box appears showing how much of the new firmware file has been transferred and h...

Страница 68: ...d setpoints file from the File pane of the EnerVista PQMII Setup Software main window Z Select the setpoint file to be loaded into the PQMII Z Click OK Z Select the File Edit Settings File Properties...

Страница 69: ...MII Setup Software displays a drop down menu When a numeric setpoint such as PHASE CT PRIMARY is selected EnerVista PQMII Setup Software displays a keypad that allows the user to enter a value within...

Страница 70: ...a file follow the steps outlined in 4 3 2 Saving Setpoints to a File To load an existing setpoints file to a PQMII and or send the setpoints to the PQMII follow the steps outlined in 4 3 4 Loading Sa...

Страница 71: ...ns on the left to display the desired waveforms The waveform values for the current cursor line position are displayed to the right of the selected buttons Numerical values are displayed directly belo...

Страница 72: ...tting Z Click the Select button for the Trigger setting The Waveform capture window will appear Z To display the harmonic spectrum click the Harmonics button on the top of the screen FIGURE 4 3 Harmon...

Страница 73: ...trigger the entire buffer is filled with 36 cycles of data 2 x 18 cycles 2 separate 18 cycle buffers are created and each is filled upon a trigger 3 x 12 cycles 3 separate 12 cycle buffers are create...

Страница 74: ...continuously log various specified parameters at the specified rate The data logger uses the 64 samples cycle data This feature is implemented into EnerVista PQMII Setup Software as shown below Z Sele...

Страница 75: ...ly 192KB The allotment of this memory can be varied between the two logs to maximize the overall log time Set the Log Size Determination to let the PQMII automatically optimize the memory If desired t...

Страница 76: ...n more than 500 events are recorded Note PQMII VDR events are stored in volatile memory Therefore all voltage disturbance events will be cleared when control power is cycled to the meter The operation...

Страница 77: ...umber reaches 65535 the event number will rollover back to 1 Dist Type The type refers to the classification of the event i e Sag Swell Undervoltage or Overvoltage Dist Source The source of the distur...

Страница 78: ...4 20 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 4 SOFTWARE FIGURE 4 6 Voltage Disturbance Recorder...

Страница 79: ...l version of EnerVista Viewpoint After the fifteen day trial period you will need to purchase a license to continue using EnerVista Viewpoint Information on license pricing can be found at http www en...

Страница 80: ...r the desired name in the Device Name field and a description optional of the site Z Select the appropriate communications interface Ethernet or Serial and fill in the required information for the PQM...

Страница 81: ...ER QUALITY METER INSTRUCTION MANUAL 4 23 FIGURE 4 9 Plug and Play Dashboard Z Click the Dashboard button below the PQMII icon to view the device information We have now successfully accessed our PQMII...

Страница 82: ...4 24 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 4 SOFTWARE FIGURE 4 10 EnerVista Plug and Play Screens...

Страница 83: ...CHAPTER 4 SOFTWARE PQMII POWER QUALITY METER INSTRUCTION MANUAL 4 25 For additional information on EnerVista viewpoint please visit the EnerVista website at http www enervista com...

Страница 84: ...4 26 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 4 SOFTWARE...

Страница 85: ...motely and downloaded at a later time to the PQMII Refer to 4 4 Using the EnerVista PQMII Setup Software for additional details Setpoint messages are organized into logical groups or pages for easy re...

Страница 86: ...IGURATION See page 5 8 MESSAGE CLOCK Z See page 5 9 MESSAGE CALCULATION Z PARAMETERS See page 5 10 MESSAGE CLEAR DATA Z See page 5 12 MESSAGE EVENT RECORDER Z See page 5 13 MESSAGE TRACE MEMORY Z See...

Страница 87: ...See page 5 29 MESSAGE DATA LOGGER Z See page 5 30 MESSAGE VOLTAGE DIST Z RECORDER See page 5 30 MESSAGE END OF PAGE S2 Z MESSAGE SETPOINTS Z S3 OUTPUT RELAYS ALARM RELAY Z See page 5 32 MESSAGE AUXILI...

Страница 88: ...5 49 MESSAGE MISCELLANEOUS Z See page 5 50 MESSAGE END OF PAGE S4 Z MESSAGE SETPOINTS Z S5 TESTING TEST RELAYS Z LEDS See page 5 51 MESSAGE CURRENT Z VOLTAGE SIMULATION See page 5 51 MESSAGE ANALOG O...

Страница 89: ...the next default message in the sequence is displayed Alarm messages will always override the default message display Note that any setpoint or measured value can be selected as a default message See...

Страница 90: ...SETPOINT ACCESS ON FOR is reached The control power to the PQMII is removed The factory setpoints are reloaded To permanently enable the setpoint access feature enable setpoint access and then set SE...

Страница 91: ...act as a logical AND That is both conditions must be satisfied before setpoint access will be enabled Assuming the setpoint access switch activation is set to closed the following flash messages will...

Страница 92: ...DNP 3 0 CONFIGURATION DNP PORT Select the appropriate PQMII port to be used for DNP protocol The COM2 selection is only available if T1 or T20 option is installed in the PQMII Each port is configured...

Страница 93: ...shown below to set the new time and date FIGURE 5 1 Setting the Date and Time The time and date can also be set via Modbus communications Refer to Broadcast Command Function Code 10h on page 7 10 as a...

Страница 94: ...e Demand Calculation Methods table below The current demand for each phase and neutral is calculated individually CURRENT DEMAND TIME INTERVAL Enter the time period over which the current demand calcu...

Страница 95: ...remains at this value until updated by the next measurement It calculates the thermal demand equivalent based on the following equation EQ 5 1 where d demand after applying input quantity for time t...

Страница 96: ...g this command CLEAR MIN MAX CURRENT VALUES Enter Yes to clear all the minimum maximum current data under the actual values subgroup A1 METERING CURRENT The time and date associated with each message...

Страница 97: ...new event number 1 The Event Recorder can be cleared only if it is enabled in S1 PQMII SETUP EVENT RECORDER EVENT RECORDER OPERATION The CLEAR EVENT RECORD command takes six seconds to complete during...

Страница 98: ...In OVERCURRENT TRIG LEVEL OFF CT Range 1 to 150 of CT in steps of 1 or OFF MESSAGE Va OVERVOLTAGE TRIG LEVEL OFF NOMINAL Range 20 to 150 of Nominal in steps of 1 or OFF MESSAGE Vb OVERVOLTAGE TRIG LE...

Страница 99: ...ace memory sampling to stop for one cycle whenever a harmonic analysis is requested Refer to 4 5 3 Trace Memory for details on trace memory implementation in the EnerVista PQMII Setup Software TRACE M...

Страница 100: ...MORY USAGE setpoint TRACE MEMORY TRIGGER DELAY In some applications it may be necessary to delay the trigger point to observe the data before the fault occurred The PQMII allows the trigger to be dela...

Страница 101: ...press the ENTER key repeatedly until the cursor returns to the position of the error and re enter the character See 3 4 Default Messages for details on selecting this message as a default message A co...

Страница 102: ...s on the use of this feature PRODUCT Z OPTIONS SELECT ORDER PQMII T20 C A Range see range in PQMII Modbus memory format code F116 MESSAGE SELECT MOD1 TO ENABLE 0 Range 0 to 999 in steps of 1 MESSAGE S...

Страница 103: ...B only A and C only A only MESSAGE PHASE CT PRIMARY OFF A Range 5 to 12000 A in steps of 5 or Off MESSAGE NEUTRAL CURRENT SENSING OFF Range Off Separate CT Calculated MESSAGE NEUTRAL CT PRIMARY 100 A...

Страница 104: ...culated on the assumption that Van Vbn Vcn 0 This assumption is valid only for balanced system voltages If the system to be measured is a Delta connection the values are 3 Wire Direct and 3 Wire Delta...

Страница 105: ...ns interface Applications include using a computer to automatically shed loads as the frequency decreases by monitoring frequency or a chart recorder to plot the loading of a system in a particular pr...

Страница 106: ...l range T20 option or the 1 mA end of the 0 to 1 mA signal range T1 option The numeric value range will depend upon which parameter is selected See the Analog Output Parameters table below If the 4 mA...

Страница 107: ...ltage Vca 0 to 200 1 Average Phase Voltage 0 to 200 1 Average Line Voltage 0 to 200 1 Voltage Unbalance 0 to 100 0 0 1 Frequency 00 00 to 75 00 Hz 0 01 Hz 3 Phase PF 0 01 lead to 0 01 lag 0 01 3 Phase...

Страница 108: ...to 7500 1 A Phase C Current Demand 0 to 7500 1 A Neutral Current Demand 0 to 7500 1 A 3 Phase kW Demand 32500 to 32500 1 kW 3 Phase kvar Demand 32500 to 32500 1 kvar 3 Phase kVA Demand 0 to 65400 1 k...

Страница 109: ...MAIN NAME MAIN ANALOG INPUT Range 20 alphanumeric characters MESSAGE ANALOG IN MAIN UNITS Units Range 10 alphanumeric characters MESSAGE MAIN 4 mA VALUE 0 Range 0 to 65000 in steps of 1 MESSAGE MAIN...

Страница 110: ...IN and ALT units To enter the units perform the same steps as shown for analog input name MAIN ALT 4 mA VALUE This message appears for each analog input and allows the user to assign a numeric value w...

Страница 111: ...t Analog Out Select Analog In Pulse Input 1 Pulse Input 2 Pulse Input 3 Pulse Input 4 Clear Energy and Clear Demand functions can be assigned to only one switch input at a time If an attempt is made t...

Страница 112: ...SE WIDTH This setpoint determines the duration of each pulse as shown in the figure below PULSE OUTPUT Z POS kWh PULSE OUTPUT RELAY OFF Range Alarm Aux1 Aux2 Aux3 Off MESSAGE POS kWh PULSE OUTPUT INTE...

Страница 113: ...haracter over the cursor A space is selected like a character Z Press the ENTER key to store the character and advance the cursor to the next position To skip over a character press the ENTER key PULS...

Страница 114: ...ct the logged information The STOP DATA LOG 1 2 setpoints allow the user to stop the respective data log These setpoints also display the current status of the respective data logger Refer to 7 6 Data...

Страница 115: ...minus 10 of nominal of the SWELL LEVEL setting This hysteresis is implemented to avoid nuisance alarms due to voltage fluctuations If the duration logged was less then or equal to 1 minute an event w...

Страница 116: ...AYS ALARM RELAY ALARM OPERATION The terms failsafe and non failsafe are defined above as implemented in the PQMII If an alarm is required when the PQMII is not operational due to a loss of control pow...

Страница 117: ...ate To ensure all conditions are acknowledged select Latched If the condition is no longer present the auxiliary relay can be reset by pressing the key or by sending the reset command via the computer...

Страница 118: ...50 of CT in steps of 1 set by the DETECT I V ALARMS USING PERCENTAGE value MESSAGE PHASE OVERCURRENT DELAY 10 0 s Range 0 5 to 600 0 s in steps of 0 5 MESSAGE PHASE OVERCURRENT ACTIVATION AVERAGE Rang...

Страница 119: ...LAY If the average phase current is less than or equal to the PHASE UNDERCURRENT LEVEL setpoint value for the time delay programmed in this setpoint a phase undercurrent condition will occur MESSAGE D...

Страница 120: ...nd displays an alarm message whenever a neutral overcurrent condition exists Selecting an auxiliary relay activates the auxiliary relay for a neutral overcurrent condition but no message will be displ...

Страница 121: ...the time delay programmed in this setpoint an overvoltage condition will occur PHASES REQ D FOR O V OPERATION Select the minimum number of phases on which the overvoltage condition must be detected b...

Страница 122: ...cting it from the phase angle at the peak sample of phase A voltage phase A angle phase B angle This angle is averaged over several cycles before deciding on the condition to avoid any false triggerin...

Страница 123: ...exceeds this setpoint value an average current THD condition occurs AVERAGE CURRENT THD DELAY If the average current THD exceeds the AVERAGE CURRENT THD LEVEL for the time delay programmed in this set...

Страница 124: ...required on phase AN AB voltage input before frequency can be measured If no voltage is applied or if the voltage applied is less than 20 V the displayed frequency will be 0 Hz If No is selected in th...

Страница 125: ...liary relay activates the auxiliary relay for a set level of POWER Z POWER ALARMS LEVEL BASE UNIT s kW kvar Range kW kvar MW Mvar MESSAGE POSITIVE REAL POWER RELAY OFF Range Alarm Aux1 Aux2 Aux3 Off M...

Страница 126: ...on can either be disabled used as an alarm or as a process control Set this setpoint to Off if the feature is not required Selecting Alarm activates the alarm relay and displays an alarm message whene...

Страница 127: ...OR LEAD 1 DROPOUT 1 00 Range 0 50 to 1 00 in steps of 0 01 MESSAGE POWER FACTOR LEAD 1 DELAY 10 0 s Range 0 5 to 600 0 s in steps of 0 5 MESSAGE POWER FACTOR LAG 1 RELAY Off Range Alarm Aux1 Aux2 Aux3...

Страница 128: ...y to the non operated state Both Power Factor 1 and 2 features are inhibited from operating unless all three voltages are above 20 of nominal and one or more currents is above 0 Power factor 1 and 2 d...

Страница 129: ...control Set this setpoint to Off if the feature is not required Selecting Alarm activates the alarm relay and displays an alarm message when the power factor is more lagging than the level set Selecti...

Страница 130: ...e Alarm Aux1 Aux2 Aux3 Off MESSAGE PHASE C CURRENT DMD LEVEL 100 A Range 10 to 7500 A in steps of 1 MESSAGE NEUTRAL CURRENT DMD RELAY OFF Range Alarm Aux1 Aux2 Aux3 Off MESSAGE NEUTRAL CURRENT DMD LEV...

Страница 131: ...ACT PWR DMD RELAY Three phase positive negative reactive power demand detection can either be disabled or used as an alarm or process control Set to Off if this feature is not required Selecting Alarm...

Страница 132: ...igned in the PULSE INPUT 1 4 RELAY will energize If the Alarm relay is PULSE INPUT Z PULSE INPUT 1 RELAY OFF Range Alarm Aux1 Aux2 Aux3 Off MESSAGE PULSE INPUT 1 LEVEL 100 Units Range 1 to 65000 in st...

Страница 133: ...assigned a TOTALIZED PULSES ALARM message will also be displayed The units in this setpoint are determined by the S2 SYSTEM SETUP PULSE INPUT PULSE INPUT UNITS setpoint TOTALIZED PULSES DELAY This set...

Страница 134: ...ock in the PQMII will remain running for a period of approximately thirty days after power has been removed from the PQMII power supply inputs Selecting On for this setpoint causes a Clock Not Set Ala...

Страница 135: ...Simulated currents and voltages can be forced instead of using actual currents or voltages This allows for verification of current and voltage related functions SIMULATION Enter On to switch from act...

Страница 136: ...On to switch from actual analog outputs to the programmed simulated values Set this setpoint Off after simulation is complete SIMULATION ENABLED FOR Select the desired length of time that simulation w...

Страница 137: ...imulated 5 6 5 Switch Inputs PATH SETPOINTS S5 TESTING SWITCH INPUTS SIMULATION SIMULATION Enter On to switch from actual switch inputs to the programmed simulated switches Set this setpoint Off after...

Страница 138: ...port or until control power is removed from the PQMII SWITCH INPUT A D Enter the switch input status open or closed to be simulated 5 6 6 Factory Use Only PATH SETPOINTS S5 TESTING FACTORY USE ONLY Th...

Страница 139: ...and using the MENU and MESSAGE keys Press the MENU key to select the actual values then the MESSAGE RIGHT key to select the beginning of a new page of monitored values These are grouped as follows A1...

Страница 140: ...4 MESSAGE FREQUENCY Z See page 6 15 MESSAGE PULSE INPUT Z COUNTERS See page 6 16 MESSAGE ANALOG INPUT Z See page 6 17 MESSAGE END OF PAGE A1 Z MESSAGE ACTUAL VALUES Z A2 STATUS ALARMS Z See page 6 18...

Страница 141: ...ON MANUAL 6 3 MESSAGE EVENT RECORDER Z See page 6 24 MESSAGE VOLTAGE DIST Z RECORDER See page 6 28 MESSAGE END OF PAGE A3 Z MESSAGE ACTUAL VALUES Z A4 PRODUCT INFO SOFTWARE Z VERSIONS See page 6 30 MO...

Страница 142: ...if the VT WIRING setpoint is set to Single Phase Direct L N is displayed when VT WIRING is set to 4 Wire Wye 3 VTs 4 Wire Wye Direct 4 Wire Wye 2 VTs or 3 Wire Direct L L is displayed when VT WIRING i...

Страница 143: ...RIMARY setpoint the unbalance reading is forced to 0 This avoids nuisance alarms when the system is lightly loaded If the simulation currents are being used the unbalance is never forced to 0 Ia Ib Ic...

Страница 144: ...SAGE Vbn MIN 100 V 12 00 00am 01 01 95 MESSAGE Vcn MIN 100 V 12 00 00am 01 01 95 MESSAGE Vab MIN 173 V 12 00 00am 01 01 95 MESSAGE Vbc MIN 173 V 12 00 00am 01 01 95 MESSAGE Vca MIN 173 V 12 00 00am 01...

Страница 145: ...ges EQ 0 2 where Vavg average phase voltage Van Vbn Vcn 3 for Wye and 3 Wire Direct connections average line voltage Vab Vbc Vca 3 for 3 Wire Delta 2 VTs connection Vm voltage in a phase or line with...

Страница 146: ...t connections Ia PHASOR A phasor representation for the magnitude and angle of Ia is displayed here Ia is used as a reference for all other Phasor angles only when there is no voltage present at the P...

Страница 147: ...FACTOR 0 99 Lag MESSAGE PHASE C REAL POWER 1000 kW MESSAGE PHASE C REACTIVE POWER 120 kvar MESSAGE PHASE C APPARENT POWER 1007 kVA MESSAGE PHASE C POWER FACTOR 0 99 Lag MESSAGE THREE PHASE REAL POWER...

Страница 148: ...01 95 MESSAGE A kvar MAX 120 12 00 00am 01 01 95 MESSAGE A kVA MAX 1007 12 00 00am 01 01 95 MESSAGE A PF MAX 0 99 Lag 12 00 00am 01 01 95 MESSAGE B kW MIN 1000 12 00 00am 01 01 95 MESSAGE B kvar MIN 1...

Страница 149: ...r 3 Wire Direct connected system THREE PHASE A B C POWER FACTOR The three phase true power factor as well as the individual phase A B C true power factors is displayed in these messages The phase A B...

Страница 150: ...ill be displayed only for a Wye connected system 3 A B C PF MIN MAX The minimum maximum three phase lead or lag power factor as well as the minimum maximum lead or lag individual phase A B C power fac...

Страница 151: ...ion add to the 3 POS REACT ENERGY value whereas reactive power in the negative direction adds to the 3 NEG REACT ENERGY value 3 APPARENT ENERGY This message displays the accumulated VAhours in kVAh si...

Страница 152: ...e S1 PQMII SETUP CALCULATION PARAMETERS TARIFF PERIOD 1 3 COST PER KWH setpoints respectively TARIFF PERIOD 1 3 NET ENERGY These messages display the net energy for the three user definable tariff per...

Страница 153: ...and the time and date when this occurred 3 kW MAX This message displays the maximum three phase real power demand in kW and the time and date when this occurred 3 kvar MAX This message displays the ma...

Страница 154: ...NPUT PULSE INPUT 1 4 VALUE setpoint The units shown after the value are as defined in the PULSE INPUT UNITS setpoint in the same menu The displayed value rolls over to 0 once the value 4294967295 FFFF...

Страница 155: ...igured via a switch input and output relay to multiplex two analog input signals The displayed user defined name and units will change to the corresponding values depending upon which analog input is...

Страница 156: ...ARM MESSAGE OVERVOLTAGE ALARM MESSAGE VOLTAGE UNBALANCE ALARM MESSAGE CURRENT UNBALANCE ALARM MESSAGE PHASE REVERSAL ALARM MESSAGE POWER FACTOR LEAD 1 ALARM MESSAGE POWER FACTOR LEAD 2 ALARM MESSAGE P...

Страница 157: ...ND ALARM MESSAGE POSITIVE REAL POWER DEMAND ALARM MESSAGE NEGATIVE REAL POWER DEMAND ALARM MESSAGE POSITIVE REACTIVE POWER DEMAND ALARM MESSAGE NEGATIVE REACTIVE POWER DEMAND ALARM MESSAGE APPARENT PO...

Страница 158: ...rdware is detected This alarm is permanently assigned to the alarm output relay and is not user configurable If this alarm is present contact the GE Multilin Service Department 6 3 2 Switch Status PAT...

Страница 159: ...ternally generated software clock which runs for approximately thirty days after the control power has been removed For instructions on setting the clock see 5 2 6 Clock The S4 ALARMS CONTROL MISCELLA...

Страница 160: ...useful in cases where lower order harmonics are dominant In a case where higher order harmonics are present it may be necessary to use a more precise method K factor of calculating the derating factor...

Страница 161: ...urrent input and the time and date which the maximum value occurred are displayed The S1 PQMII SETUP CLEAR DATA CLEAR MAX THD VALUES setpoint clears this value MESSAGE PHASE C CURRENT THD 4 5 MESSAGE...

Страница 162: ...UAL VALUES A3 POWER ANALYSIS EVENT RECORDER The PQMII Event Recorder runs continuously and records the number cause time date and metering quantities present at the occurrence of each event This data...

Страница 163: ...Demand Alarm Control Dropout ALARM RESET Latched Alarm Auxiliary Reset AN INPUT ALT Alternate Analog Input Alarm Control Pickup AN INPUT ALT Alternate Analog Input Alarm Control Dropout AN INPUT MAIN...

Страница 164: ...rcurrent Alarm Control Pickup OVERCURRENT Overcurrent Alarm Control Dropout OVERFREQUENCY Overfrequency Alarm Control Pickup OVERFREQUENCY Overfrequency Alarm Control Dropout OVERVOLTAGE Overvoltage A...

Страница 165: ...ntrol Pickup PULSE IN 4 Pulse Input 4 Alarm Control Dropout PULSE TOTAL Totalized Pulses Alarm Control Pickup PULSE TOTAL Totalized Pulses Alarm Control Dropout SELF TEST Self Test Failure Alarm Picku...

Страница 166: ...same manner except that it involves a voltage decrease below the sag level Source The source of the disturbance is the phase voltage that recorded the disturbance either Van Vbn Vcn Vab or Vca If the...

Страница 167: ...rder is independent from the event recorder The alarm events will record normally as per the conditions set within the S4 ALARMS CONTROL settings menu regardless whether the voltage disturbance record...

Страница 168: ...y of the PQMII 6 5 2 Model Information PATH ACTUAL VALUES A4 PRODUCT INFO MODEL INFORMATION Product identification information is contained in these messages ORDER CODE This indicates which features w...

Страница 169: ...D NUMBER S ORDER CODE and SERIAL NUNBER should be specified with the order SERIAL NUMBER This is the serial number of the PQMII This should match the number on the label located on the back of the PQM...

Страница 170: ...6 32 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 6 MONITORING...

Страница 171: ...nt The PQMII defines any of the following situations as an event Analog Input Alternate Alarm Analog Input Alternate Alarm Clear Analog Input Main Alarm Analog Input Main Alarm Clear Clear Event Recor...

Страница 172: ...utral Overcurrent Alarm Neutral Overcurrent Alarm Clear Overcurrent Alarm Overcurrent Alarm Clear Overfrequency Alarm Overfrequency Alarm Clear Overvoltage Alarm Overvoltage Alarm Clear Parameters Not...

Страница 173: ...ctor Lead 2 Alarm Power Factor Lead 2 Alarm Clear Power Off Power On Pulse Count Total Alarm Pulse Input 1 Alarm Pulse Input 1 Alarm Clear Pulse Input 2 Alarm Pulse Input 2 Alarm Clear Pulse Input 3 A...

Страница 174: ...The Event Recorder can be enabled disabled or cleared via the keypad or serial port The following data is saved when an event occurs Analog Input high Analog Input low Date Month Day Date Year Event C...

Страница 175: ...h Pa low Pb high Pb low Pc high Pc low PF3 PFa PFb PFc Positive kvarh high Positive kvarh low Positive kWh high Positive kWh low Q3 high Q3 low Q3 Demand high Q3 Demand low Qa high Qa low Qb high Qb l...

Страница 176: ...low Vcn high Vcn low Vcn THD Voltage THD Alarm Voltage THD Alarm Clear Voltage Unbalance Alarm Voltage Unbalance Alarm Clear 7 1 2 Access to Event Recorder Information There are two ways to access Eve...

Страница 177: ...milar to the Event Recorder The differences between the two recorders are the Modbus addresses the event data and the number of events 150 compared to 500 Refer to the 7 3 Modbus Memory Map for additi...

Страница 178: ...ing used to upload firmware has a screen saver enabled and the screen saver operates during the upload process the communication port will be interrupted during the launch of the screen saver It is re...

Страница 179: ...connected to the PQMII Z Click on OK The following window will appear Z Change the settings in the Properties window to match those shown above Z Click on OK You should now have a link to the PQMII Z...

Страница 180: ...nd File on the Hyperterminal task bar Z Enter the location and the name of the firmware file you wish to send to the PQMII and ensure the Protocol is 1KXmodem Z Click on Send The PQMII will now procee...

Страница 181: ...f N digital samples g0 g1 gN 1 gn nth sample from g N number of samples f0 fundamental frequency in Hertz 0 2 f0 angular frequency in radians T 1 f0N time between samples The PQMII Trace Memory featur...

Страница 182: ...ituting in the above delta values results in the form of the equations that will be used to calculate the phasors EQ 0 8 Im g 1 8 k1 g3 g5 g11 g13 g19 g21 g27 g29 k2 g2 g6 g10 g14 g18 g22 g26 g30 k3 g...

Страница 183: ...nsecutive cycle or 16 samples and compares this value with the user defined trigger levels to determine if it will record all sampled waveforms The sampled waveforms include Ia Ib Ic In Va Vb and Vc S...

Страница 184: ...ail safe or Non Failsafe Pulse Acceptance Capability of the End Receiver This parameter is normally expressed as any one of the following a Pulses per Demand Interval b Pulses per second minute or hou...

Страница 185: ...Failsafe or Non Failsafe to match the normally open closed configuration of the KY and KZ connections at the end receiver The K connection is always made to the COM connection of the designated PQMII...

Страница 186: ...t the data log stores entries Present Log Time and Date The time and date of the most recent Record Log Start Block Block number containing the first byte of the logged data Log Start Register The Reg...

Страница 187: ...t as a rolling window of data in time going back in time as far as the amount of records times the Log Time Interval will allow in the total space of memory available 7 6 3 Accessing Data Log Informat...

Страница 188: ...egisters in a Block Then divide this number by 2 number of bytes in a register and truncate the remainder of the division to determine the Block number Multiplying the remainder of the division by 64...

Страница 189: ...ith the first Record in the Log For example Log Time Interval 3600 Log Time Hours Minutes 02 30 Log Time Seconds 30300 Log Date Month 06 15 Log Date Year 1997 Log Records Used 1600 The last Record ent...

Страница 190: ...THD Total Harmonic Distortion Table 7 1 Data Log Parameters DATA LOG PARAMETER SIZE bytes DATA LOG PARAMETER SIZE bytes DATA LOG PARAMETER SIZE bytes Ia 2 PFa 2 kVAh 4 Ib 2 Pb 4 Ia Demand 2 Ic 2 Qb 4...

Страница 191: ...ta Value is as calculated Applying the Units and Scale parameters to the Data Value we multiply the Data Value by 0 01 kW Therefore the resultant value of 3 Phase Real Power as read from the memory ma...

Страница 192: ...216 60027 converted to decimal 4282051195 decimal The most significant bit of the High Order register is set therefore the Data Value is DATA VALUE DATA VALUE 232 4282051195 4294967296 12916101 Multi...

Страница 193: ...Because of the multi functional parameters of the PQMII Switch Inputs the PQMII Switch Inputs are not labeled with KYZ markings as a dedicated pulse input device However the PQMII can still be used a...

Страница 194: ...PQMII Pulse Input 1 4 Value This value is assigned to each counting operation as determined by the Switch Input PQMII Totalized Pulse Input This parameter creates a summing register of the various Pu...

Страница 195: ...hed on and off at the times when the PQMII is reading the Switch Inputs status Monitoring the input to one of the PQMII Switch Inputs will reveal a pulsed 24 V DC waveform not a constant signal Standa...

Страница 196: ...7 26 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 7 APPLICATIONS...

Страница 197: ...hat it is defective and it is returned with all transportation charges prepaid to an authorized service centre or the factory Repairs or replacement under warranty will be made without charge Warranty...

Страница 198: ...8 2 PQMII POWER QUALITY METER INSTRUCTION MANUAL CHAPTER 8 WARRANTY...

Страница 199: ...ocated in setpoints page S4 ALARMS CONTROL MOD 506 SETPOINTS after the MISCELLANEOUS heading PATH SETPOINTS S4 ALARMS CONTROL MOD 506 SETPOINTS MOD 506 Z SETPOINTS STEP 1 RELAY OFF Range Alarm Aux1 Au...

Страница 200: ...5 0 min Range 0 1 to 60 0 min in steps of 0 1 MESSAGE STEP 3 RELAY OFF Range Alarm Aux1 Aux2 Aux3 Off MESSAGE STEP 3 PICKUP 600 kvar Range 0 1 to 6500 0 kvar in steps of 0 1 MESSAGE STEP 3 DROPOUT 0...

Страница 201: ...voltage is greater than this setpoint the time set in the SYSTEM STABILIZATION TIME setpoint must have elapsed before any actions will be performed If this feature is not required set it to Off LOW V...

Страница 202: ...VOLTAGE DETECT TIMER This timer is loaded with the LOW VOLTAGE DETECT DELAY setpoint setting when low voltage is detected and will start to count down to 0 Note If the power to the PQMII is removed al...

Страница 203: ...10 1 0 min 1304 Step 1 Disable Time 1 to 600 1 min F1 50 5 0 min 1305 Step 2 Relay 0 to 4 1 F1 0 OFF 1306 Step 2 Pickup Level 1 to 65000 1 kvar F1 6000 600 0 kvar 1307 Step 2 Dropout Level 32000 to 3...

Страница 204: ...IX A 3 1 3 4 2 4 1 4 2 3 5 1 4 3 2 6 2 1 3 4 7 2 1 4 3 8 2 3 1 4 9 2 3 4 1 10 2 4 1 3 11 2 4 3 1 12 3 1 2 4 13 3 1 4 2 14 3 2 1 4 15 3 2 4 1 16 3 4 1 2 17 3 4 2 1 18 4 1 2 3 19 4 1 3 2 20 4 2 1 3 21 4...

Страница 205: ...106435D 1601 0118 A5 2 1x 18 June 2004 GEK 106435E 1601 0118 A6 2 2x Not released GEK 106435F 1601 0118 A7 2 2x 15 May 2006 GEK 106435G 1601 0118 A8 2 2x 22 February 2007 GEK 106435H 1601 0118 A9 2 2x...

Страница 206: ...06435J SECT A9 SECT AA CHANGE DESCRIPTION Title Title Update Manual part number to 1601 0120 AA All All Update Re establish all cross references Table A 5 Major Updates for GEK 106435H SECT A8 SECT A9...

Страница 207: ...A5 PAG E A7 CHANGE DESCRIPTION Title Title Update Manual part number to 1601 0120 A7 7 9 7 9 Update Updated Modbus Memory Map 7 58 7 58 Update Updated Default Variations section 7 59 7 59 Update Upda...

Страница 208: ...A 10 PQMII POWER QUALITY METER INSTRUCTION MANUAL APPENDIX A...

Страница 209: ...lexing 2 16 setpoints 5 25 simulation 5 53 ANALOG OUTPUTS connection 2 17 description 2 16 parameters 5 23 setpoints 5 21 simulation 5 52 specifications 1 14 APPLICATION NOTES 7 1 APPLICATIONS OF THE...

Страница 210: ...19 specifications 1 14 CURRENT METERING actual values 6 4 clearing values 5 12 CURRENT TRANSFORMERS see entry for CTs CURRENT UNBALANCE 5 37 6 5 CYCLING POWER 7 8 D DATA LOGGER accessing 7 17 actual v...

Страница 211: ...f events 6 25 7 1 setpoints 5 13 EXPANSION 1 5 EXTERNAL CONNECTIONS 2 3 EXTRACT FUNDAMENTAL 5 10 F FACTORY MODIFICATIONS 1 13 FEATURES 1 2 1 4 1 5 FIRMWARE upgrading via EnerVista PQMII setup software...

Страница 212: ...1 13 6 30 MOUNTING 2 1 O OPTIONS 5 18 ORDER CODES 1 13 6 30 OUTPUT RELAYS alarm relay 2 14 5 32 auxiliary relays 2 14 description 2 14 introduction 1 7 setpoints 5 32 specifications 1 15 OVERCURRENT 5...

Страница 213: ...tions 7 14 setpoints 5 28 specifications 1 14 PULSE TOTALIZER APPLICATION 7 24 R RESET KEY 3 4 3 5 REVISION HISTORY 2 2 RS232 COMMUNICATIONS configuring with EnerVista PQMII setup 4 7 connections 2 19...

Страница 214: ...points 5 27 simulation 5 53 specifications 1 14 wiring 2 15 SWITCH STATUS 6 20 T TARIFF PERIOD 5 11 TEST LEDs 5 51 TEST RELAYS 5 51 THD actual values 6 22 clearing values 5 13 setpoints 5 39 THDF 6 22...

Страница 215: ...ettings 5 30 specifications 1 15 1 17 VOLTAGE INPUTS description 2 13 setpoints 5 19 specifications 1 14 VOLTAGE METERING actual values 6 6 clearing values 5 12 VOLTAGE TRANSFORMERS see entry for VTs...

Страница 216: ...B VIII PQM POWER QUALITY METER INSTRUCTION MANUAL CHAPTER B INDEX...

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