Power Quality Meter Continuous metering of three-phase systems. 9 Features and Benefits ■ Standard and portable options ■ Power quality analysis ■ Flexible control for demand load shedding, power factor, etc. Applications ■ Continuous metering of distribution feeders, transformers, capacitor banks, generators and motors ■ Medium and low voltage systems enerVista.com compatible (see page 275) ■ Programmable setpoints ■ ■ Four assignable output relays Protection and Control ■ Four switch inputs ■ ■ Process variable measurement using analog input ■ PC connectivity ■ Allows for calculation of harmonic distribution ■ Communicates with GE Multilin 269 (MOD 508) Basic alarm on overcurrent, undercurrent or voltage unbalance Monitoring and Metering ■ Current, voltage, real and reactive power, energy use, cost of power, power factor and frequency ■ Harmonic analysis User Interfaces ■ Select URPC functionality ■ RS232 and RS485 ports GE Multilin 1 PQM/PPQM Power Quality Meter Standard Features The PQM is a digital metering device that provides continuous monitoring of a three-phase system. It provides metering of current, voltage, real and reactive power, energy use, cost of power, power factor and frequency. When portable monitoring of a three-phase system is required, a Portable PQM is the ideal choice. This version offers the same features as the panel mount PQM in a rugged carrying case. The PPQM additionally acts as a power management tool, a troubleshooting tool and a data collection device. In either form, the PQM can provide users with advanced features for monitoring and metering which include: Mounting Versatility The panel mount with display offers an easy local interface. Standard models have RS485 ModBus ® communications for programming and monitoring. Users can replace expensive additional devices by adding the CONTROL, TRANSDUCER and POWER analysis options to the PQM as required. 9 Metering Each voltage and current is sampled 64 times per cycle for 0.2% accuracy true RMS True RMS or displacement (fundamental) quantities. ■ Ia Ib Ic In ■ Va Vb Vc Vab Vbc Vca ■ V I unbalance ■ True PF crest and K factor ■ Hz W var VA ■ Wh varh VAh W cost ■ Demand: A W var VA A keypad and illuminated 40 character display provide local setpoint setting and monitoring values and status. Alarms Any of the assignable outputs may be used to trigger an alarm 2 for specific applications. Simple alarm messages provide easy notification. CONDITION APPLICATION overcurrent undercurrent neutral current current unbalance overvoltage undervoltage phase sequence overfrequency underfrequency power factor switch input motors/transformers pumps/compressors leakage/unbalance motors equipment protection motors/load transfer pumps/equipment generators load shedding capacitor banks process control Communications Integrate process, instrumentation and electrical requirements in a plant automation system by connecting PQM meters together to a DCS or SCADA system. A computer running PQMPC can change system setpoints, monitor values, status and alarms. Continuous monitoring minimizes process downtime by immediately identifying potential problems due to faults or changes from growth. ■ RS485 ModBus® 1,200 to ■ ■ ■ ■ ■ ■ 19,200 bps Mini RTU SCADA system component Measure actual values Read status Issue control commands Load all setpoints from a file Change individual setpoints The standard version PQM comes complete with a front RS232 port which can be used for data collection, printing reports or problem analysis without disturbing the main communication interface to rear RS485 port. Initially PQM meters can be used as stand-alone units. Open architecture allows connection to other or ModBus ® -compatible devices on the same communication link. These can be integrated in a complete plant wide system for overall process monitoring and control. Options There are a variety of options available to the user, allowing a range of custom configurations: Transducer Four Analog Outputs: four isolated analog outputs can be used to replace eight analog transducers. Output signals can be selected from any of the measured parameters for direct interface to a PLC. Analog Input: with the analog input and an output relay for selection, two transducers (such as temperature or water level) can be monitored and used for control. Connect two 4 to 20 mA transducers for process variable measurement and control. 4-20 mA transducer PQM AUX RELAY STATUS 4-20 mA transducer COMMUNICATE RELAYS TX1 ALARM PROGRAM RX1 AUX1 SIMULATION TX2 AUX2 SELF TEST RX2 AUX3 ALARM ANALOG INPUT PQM Power Quality Meter 823803A4.cdr Second Rear Comm Port: an additional rear RS485 comm port is provided for simultaneous monitoring by process, instrument, electrical or maintenance personnel. Redundancy in high security systems is provided by the 2nd RS485 comm port. COM1 RS485 COM2 RS485 PLANT CONTROL SYSTEM Future Expansion The PQM uses non-volatile flash memory for firmware storage. This allows future product upgrades to be loaded via the serial port. Upgrades can also be accessed from www.geindustrial.com/Multilin. Ia = 100 Ic = 100 STATUS Ib = 102 AMPS COMMUNICATE RELAYS Ia = 100 Ic = 100 STATUS Ib = 102 AMPS COMMUNICATE RELAYS Ia = 100 Ic = 100 STATUS Ib = 102 AMPS COMMUNICATE RELAYS ALARM TX1 ALARM ALARM TX1 ALARM ALARM TX1 ALARM PROGRAM RX1 AUX1 PROGRAM RX1 AUX1 PROGRAM RX1 AUX1 SIMULATION TX2 AUX2 SIMULATION TX2 AUX2 SIMULATION TX2 AUX2 SELF TEST RX2 AUX3 SELF TEST RX2 AUX3 SELF TEST RX2 AUX3 PQM Power Quality Meter PQM Power Quality Meter PQM Power Quality Meter 823777A7.CDR www.GEindustrial.com/Multilin PQM/PPQM Power Quality Meter Control Three Output Relays and Four Inputs: measured parameters from the standard PQM can be combined with setpoints and I/Os for control applications. With the control option, three output relays and four switch inputs are added along with programmable setpoints to make a mini RTU. Output relays can also be controlled via the communication port or assigned to different setpoints for custom programming to accommodate many situations. Possibilities include: ■ Undercurrent alarm for pumps ■ Over and undervoltage for ■ ■ ■ ■ generators Unbalance alarm for rotating machines Dual level power factor for capacitor bank switching Underfrequency/demand output for load shedding resulting in power cost savings kWh, kvarh and kVAh pulse output for PLC interface Record trends of measured parameters over time. Event Recorder: alarms, setpoint triggers, input and output events can be stored in a 40 event record and time and date stamped by the internal clock. This is useful for diagnosing problems and system activity. Minimum and maximum values are also continuously updated and time stamped. Harmonic Analysis: non linear loads such as variable speed drives, computers and electronic ballasts can cause harmonics which may lead to problems such as nuisance breaker tripping, telephone interference, transformer, capacitor or motor overheating. For fault diagnosis such as detecting undersized neutral wiring, need for a harmonic rated transformer, or effectiveness of harmonic filters, details of the harmonic spectrum are useful and available with the power analysis option. Trace Memory: the PQM can be configured to record a maximum of 36 cycles of data on all voltage and current inputs based on overvoltage, undervoltage, overcurrent or switch input state change. Harmonic spectrum analysis can identify problems and ensures implemented changes work correctly. Power factor setpoints and two output relays can be used for two-level capacitor bank switching. BANK 1 DUAL CAPACITOR BANK POWER FACTOR CONTROL ON OFF BANK 2 OFF ON OFF -1.05 LEAD Delay 1 BANK 1 Drop Out LAG POWER FACTOR Delay 2 BANK 2 Drop Out +0.95 BANK 1 Pickup +0.90 Delay 1 BANK 2 Pickup Delay 2 +0.85 0 2 4 6 8 10 12 14 16 TIME (hour) 18 20 22 PQMPC Program PQMPC is a Windows ® -based program that can be used to enter setpoints, read metered values, monitor status and evaluate power quality. All data continuously gathered by the PQM can be transferred to a third party software program for display, control or analysis via the communications interface. Once all setpoints have been entered they can be downloaded into any PQM or stored in a file with a tag name for later reference. OFF 1.00 Software 24 823757A7.cdr Power Analysis Data Logger (Trending): trending is useful as a troubleshooting aid when a problem is detected. Measured values can be selected and plotted with a programmable sampling rate to suit the time interval of interest. The generated chart recorder screen can be printed or exported to other programs for report writing. www.GEindustrial.com/Multilin Waveform Capture: voltage and current waveforms can be captured and displayed on a PC using the PQMPC program supplied with the PQM or using third party software. Distorted peaks or notches from SCR switching provide clues for taking corrective action. Voltage and current waveforms provide valuable insights into system problems. 9 Screens are available for monitoring all measured values such as current, voltage, or power. Status of alarms and control settings can also be displayed. Voltage and current waveshape can give important information about what is happening on a system. For example, non linear loads such as computers or variable speed drives may introduce distortion that indicates filtering is required. Gain useful system information using voltage/current waveform capture. Select waveform for display Analyze waveform or copy to other software 3 PQM/PPQM Power Quality Meter Typical Wiring ALTERNATIVE CT/VT CONNECTIONS LINE A LOAD A PHASE A CT PHASE B CT B PHASE C CT N VTbn N LINE A PHASE B CT B C OPTIONAL NEUTRAL CT B 4 V2 V3 VN 5A 10 1A COM 5A 1A COM 5A PHASE B PHASE A VOLTAGE INPUTS 1A COM 5A PHASE C 1A COM NEUTRAL CURRENT INPUTS OBSERVE CT & VT POLARITY Perferrred 4 wire configuration 600V MAX 4 WIRE WYE DIRECT/120° VOLTAGE NO VT VTan VTbn 1 2 VTcn LOAD A PHASE A CT PHASE B CT B B PHASE C CT C C OPTIONAL NEUTRAL CT N 3 4 V1 V 2 V3 VN V1 4 3 V2 V3 VN 9 5A 10 1A COM 5A 1A COM 5A 1A COM 5A 8 7 LOAD A PHASE A CT PHASE B CT B B PHASE C CT C USE HEAVY GAUGE WIRE 6 5 L + N_ SAFETY GROUND FILTER GROUND 1A COM 5A N VTcn SWITCHGEAR GROUND BUS USE SHIELDED TWISTED PAIR WIRE ALARM 44 COM 3 4 10 11 12 13 14 15 16 17 18 19 20 1A COM 5A PHASE A 1A COM 5A PHASE B 1A COM 5A PHASE C 42 NO *Note: Accurate only with balanced phase voltages AUX1 40 NC LOAD 2 PHASE CTs A 41 COM ANY VOLTAGE 3 WIRE DELTA/60° VOLTAGE 2 VTs LINE A B PHASE C CT C B 39 NO C 38 COM AUX2 37 NC VTab VTcb 36 NO 35 COM 2 or 3 CTs see below 34 1 2 3 4 V2 V3 VN V1 9 5A 10 1A COM 5A PHASE A VOLTAGE INPUTS 1A COM 5A PHASE B 1A COM 5A PHASE C 1A COM NEUTRAL CURRENT INPUTS LINE A LOAD L PHASE A CT PHASE B CT B N PHASE C CT 1 2 3 4 V2 V3 VN V1 9 5A 10 + 51 _ 50 1A COM 5A PHASE B 1A COM 5A PHASE C SINGLE PHASE DIRECT NO VTs 28 2+ 27 3+ 26 4+ 25 SW2 30 SW3 LOAD L N N COM2 RS485 TO/FROM DEVICE 4-20mA TRANSDUCER TO PLC OR SCADA SYSTEM 29 SW4 COM3 RS232 (FRONT) RS232 INTERFACE PQM 1 TXD 2 RXD 3 4 SGND 5 6 7 8 9 COMPUTER 1 2 3 4 5 6 7 8 9 8 3 RXD 2 TXD 20 7 SGND 6 4 5 22 9 PIN CONNECTOR 25 PIN CONNECTOR 1) Relay contact state shown with control power not applied. 600V MAX PHASE CT 22 1+ CURRENT INPUTS LINE L 23 _ 21 NOTES: 1A COM NEUTRAL + SHIELD 11 12 13 14 15 16 17 18 19 20 1A COM 5A PHASE A VOLTAGE INPUTS 31 33 +24VDC 2 or 3 CTs see above 47 COM 24 32 SW1 600V MAX C NC PROGRAMMABLE SWITCH INPUTS Preferred 3 wire configuration 3 WIRE DIRECT/120° VOLTAGE NO VTs AUX3 DRY CONTACT SWITCH INPUTS 11 12 13 14 15 16 17 18 19 20 COM1 RS485 TO/FROM DEVICE 48 COM 49 43 NC 1A COM NEUTRAL CURRENT INPUTS OUTPUT RELAYS 9 9 5A + _ COM 46 ANALOG IN 2 V2 V3 VN VOLTAGE INPUTS ANALOG OUT 1 COM GE Multilin 45 NO V1 1A NEUTRAL PHASE C PHASE B CURRENT INPUTS PQM Power Quality Meter C OPTIONAL NEUTRAL CT N 1A COM 5A 1A COM NEUTRAL ANY VOLTAGE 4 WIRE WYE/60° VOLTAGE 2 VTs (2-1/2 ELEMENTS) VTan PHASE A CONTROL POWER PHASE C PHASE B CURRENT INPUTS LINE A 1A COM 5A 11 12 13 14 15 16 17 18 19 20 PHASE A VOLTAGE INPUTS 10 11 12 13 14 15 16 17 18 19 20 VOLTAGE INPUTS CONTROL POWER 90-300 VDC 70-265 VAC 50/60 Hz 2 9 5A N 9 WIRE RS232 LINE A 1 N 11 12 13 14 15 16 17 18 19 20 COM 1 V1 9 RS485 SERIAL 3 COM 2 2 C OPTIONAL NEUTRAL CT N 1 LOAD PHASE C CT C VTcn 4-20mA VTan PHASE A CT A B C ANY VOLTAGE 4 WIRE WYE/120° VOLTAGE 3 VTs ANY VOLTAGE 4 WIRE WYE/120° VOLTAGE 3 VTs PERSONAL COMPUTER CAUTION: USE HRC FUSES FOR VT PRIMARY TO ENSURE ADEQUATE INTERRUPTING CAPACITY. RS232 PQMPC Transducer Option 1 V1 2 3 VOLTAGE INPUTS 4 4 V2 V3 VN 9 5A 10 11 12 13 14 15 16 17 18 19 20 1A COM 5A PHASE A 1A COM 5A PHASE B 1A COM 5A PHASE C CURRENT INPUTS 1A COM NEUTRAL Control Option 823807AS.CDR 823753AQ.DWG www.GEindustrial.com/Multilin PQM/PPQM Power Quality Meter Harmonic analysis can provide early warning of problems, helping to prevent equipment damage or nuisance breaker tripping. PQMPC enables waveform capture information to be transferred to other programs for inclusion in reports and printouts. Routine event logs of demand or sampled voltage can also be created and printed out. To verify correct installation, the simulation mode substitutes programmed currents and voltages for real ones. This powerful tool is also an excellent training aid for plant personnel. URPC Program The Windows ® -based URPC program allows the user to create single line diagrams for substa- tion and system monitoring schemes. Additionally, annunciator panel viewing, metering, and settings changes can also be performed using the program. With the URPC program the user can access multiple PQMs or different devices for metering in real time. The program may be used locally through the RS232 serial port or remotely through the other ports on the device. PQM Technical Specifications MONITORING UNDERVOLTAGE MONITORING Required voltage: 20 V applied Pickup level: 0.50 – 0.99 in steps of 0.01 x VT Dropout level: 103% of pickup Time delay: 0.5 – 600.0 in steps of 0.5 sec Phases: Any one/any two/all three (programmable) phases have to go below pickup to operate Level accuracy: Per voltage input Timing accuracy: -0/+1 sec OVERVOLTAGE MONITORING Pickup level: 1.01 – 1.25 in steps of 0.01 x VT Dropout level: 97% of pickup Time delay: 0.5 – 600.0 in steps of 0.5 sec Phases: Any one/any two/all three (programmable) phases have to exceed pickup to operate Level accuracy: Per voltage input Timing accuracy: -0/+1 sec UNDERFREQUENCY MONITORING Required voltage: 20 V applied Pickup level: 20 – 70.00 in steps of 0.01 Hz Dropout level: Pickup +0.03 Hz Time delay: 0.1 – 10.0 in steps of 0.1 sec Level accuracy: ±0.02 Hz Timing accuracy: ±3 cycles OVERFREQUENCY MONITORING Required voltage: 20 V applied Pickup level: 20 – 70.00 in steps of 0.01 Hz Dropout level: Pickup -0.03 Hz Time delay: 0.1 – 10.0 in steps of 0.1 sec Level accuracy: ±0.02 Hz Timing accuracy: ±3 cycles POWER FACTOR MONITORING Required voltage: 20 V applied 0.50 lag – 0.50 lead in steps of 0.01 Pickup level: Dropout level: 0.50 lag – 0.50 lead in steps of 0.01 Time delay: 0.5 – 600.0 in steps of 0.5 sec Timing accuracy: -0/+1 sec SAMPLING MODES SAMPLES/ CYCLE Metered values 64 Trace memory 16 Harmonic spectrum 256 INPUTS SAMPLED DURATION AT A TIME (CYCLES) ALL 2 ALL continuous 1 1 DEMAND MONITORING Measured values: Phase A/B/C/N current (A) 3φ real power (kW) 3φ reactive power (kvar) 3φ apparent power (kVA) Measurement type: Thermal exponential 90% response time (programmable): 5 – 60 min, steps of 1 min Block interval/rolling demand time in interval (programmable): 5 – 60 min, steps of 1 min Pickup level: A: 10 – 7,500 in steps of 1 kW: 0.1 – 6,500.0 in steps of 0.1 kvar: 0.1 – 6,500.0 in steps of 0.1 kVA: 0.1 – 6,500.0 in steps of 0.1 POWER SUPPLY CONTROL POWER Input: 90 – 300 VDC 70 – 265 VAC 50/60 Hz Power: 10 VA nominal, 20 VA maximum Holdup: 100 ms typical @ 120 VAC/VDC www.GEindustrial.com/Multilin METERING MEASURED VALUES ACCURACY PARAMETER (% of full scale) RESOLUTION RANGE Voltage ±0.2% 1 VOLT 20% of VT – 100% of VT Current ±0.2% 1A 1% of CT – 150% of CT Voltage unbalance ±1% 0.1% 0 – 100.0% Current unbalance ±1% 0.1% 0 – 100.0% kW ±0.4% 0.01 kW 0 – 999,999.99 kW kvar ±0.4% 0.01 kvar 0 – 999,999.99 kvar kVA ±0.4% 0.01 kVA 0 – 999,999.99 kVA kWh ±0.4% 1 kWh 232 kWh kvarh ±0.4% 1 kvarh 232 kvarh kVAh ±0.4% 1 kVAh 232 kVAh Power factor 1% 0.01 ±0.0 – 1.0 Frequency 0.02 Hz 0.01 Hz 20.00 – 70.00 Hz kw demand ±0.4% 0.1 kw 999,999.99 kw kvar demand ±0.4% 0.1 kvar 999,999.99 kvar kva demand ±0.4% 0.1 kva 999,999.99 kva Amps demand ±0.2% 1A 0 – 7,500 A Amps THD ±2.0% 0.1% 0.0 – 100.0% Volts THD ±2.0% 0.1% 0.0 – 100.0% Crest factor ±0.4% — 1 – 9.99 INPUTS AC CURRENT Conversion: CT input: Burden: Overload: True RMS, 64 samples/cycle 1 A and 5 A secondary 0.2 VA 20 x CT for 1 sec 100 x CT for 0.2 sec 150% of CT up to 32nd harmonic ±0.2% of full scale, true RMS Full scale: Frequency: Accuracy: AC VOLTAGE Conversion: True RMS, 64 samples/cycle VT pri/sec: Direct or 120 – 72,000 : 69 – 240 Input range: 20 – 600 VAC Full scale: 150/600 VAC autoscaled Burden: <0.1 VA Frequency: up to 32nd harmonic Accuracy: ±0.2% of full scale, true RMS SWITCH INPUTS Type: Dry contact Resistance: 1,000 Ω max ON resistance Voltage: 24 VDC @ 2 mA Duration: 100 ms minimum ANALOG INPUT Range: 4 – 20 mA Accuracy: ±1% of full scale Relay output: Programmable 4 – 20 mA Internal burden resistance: 250 Ω PULSE INPUT Max inputs: 4 Min pulse width: 150 ms Min off time: 200 ms COMMUNICATIONS COM1/COM2 type: RS485 2-wire, half duplex, isolated COM3 type: RS232, 9PIN Baud rate: 1,200 – 19,200 bps Protocol: ModBus® RTU Functions: Read/write setpoints Read actual values Execute commands OUTPUTS ANALOG OUTPUTS Accuracy: ±1% of full scale reading OUTPUT 0 – 1 mA (T1 Option) 0 – 20 mA and 4 – 20 mA (T20 Option) Max load 2400 Ω 600 Ω Max output 1.1 mA 21 mA Isolation: 50 V isolated, active source OUTPUT RELAYS Voltage Make/Carry Make/Carry Continuous 0.2 SEC Break 30 VDC 5 30 5 Resistive 125 VDC 5 30 0.5 250 VDC 5 30 0.3 30 VDC 5 30 5 Inductive 125 VDC 5 30 0.25 (Vr = 7ms) 250 VDC 5 30 0.15 120 VAC 5 30 5 Resistive 250 VAC 5 30 5 Inductive 120 VAC 5 30 5 PF = 0.4 250 VAC 5 30 5 Configuration FORM C NO/NC Contact material SILVER ALLOY PULSE OUTPUT Parameters: Interval: Pulse width: Min pulse interval: +ve kWh, –ve kWh, +ve kvarh, –ve kvarh, kVAh 1 – 65000 in steps of 1 100 – 2000 ms in steps of 10 ms 500 ms 9 ENVIRONMENTAL Humidity: 95% non-condensing Temperature: -10° C to +60° C ambient Environment: IEC 68-2-38 temperature/humidity cycle PACKAGING Shipping box: 8 1/2" L x 6" H x 6" D (215 mm x 152 mm x 152 mm) Ship weight: 5 lbs (2.3 kg) NOTE: LCD contrast impaired below -20° C TYPE TESTS Dielectric strength: Insulation resistance: Transients: Impulse test: RFI: EMI: Static: 2.0 kV for 1 min to relays, CTs, VTs, power supply IEC255-5 500 VDC ANSI C37.90.1 oscillatory 2.5 kV/1 MHz ANSI C37.90.1 fast rise 5 kV/10 ns Ontario Hydro A-28M-82 IEC255-4 impulse/high frequency disturbance Class III Level IEC 255-5 0.5 J 5 kV 50 MHz/15 W transmitter C37.90.2 electromagnetic interference @ 150 MHz and 450 MHz, 10 V/m IEC 801-2 static discharge Note: Type test report available upon request. APPROVALS ISO: Manufactured to an ISO9001 registered program UL: UL listed for the USA and Canada : Conforms to EN 55011/CISPR 11, EN 50082-2 Conforms to IEC 947-1, IEC 1010-1 *Specifications subject to change without notice. 5 PQM/PPQM Power Quality Meter PQM Dimensions PANEL MOUNT WITH DISPLAY USE MOUNTING A FRONT 7.36" (187) STATUS ALARM 4.35" (110) RELAYS ALARM COMMUNICATE TX1 PROGRAM RX1 AUX1 SIMULATION TX2 AUX2 SELF TEST RX2 AUX3 SIDE 3.92" (100) 0.85" (22) PQM Power Quality Meter DETACHABLE FACE PLATE VERSION (MOD 505) DETACHABLE FACE PLATE FRONT DETACHABLE FACE PLATE CHASSIS SIDE USE MOUNTING A USE MOUNTING B 0.85" (22) 7.36" (187) REAR SIDE MOUNTING SURFACE STATUS ALARM 4.35" (110) RELAYS ALARM COMMUNICATE TX1 PROGRAM RX1 AUX1 SIMULATION TX2 AUX2 SELF TEST RX2 AUX3 4.07" (103) PQM Power Quality Meter 7.50" (191) 4.54" (115) 1.81" (46) MOUNTING A 7.10" (180) 0.10" (2.5) 6.90" (175) 0.32" (8) CUT-OUT 1.16" (29) 1.73" (44) 4.11" (104) 2.32" (59) (6) - 0.218" Dia. HOLES (6.00) 3.47" (88) 0.08" R (8 PLACES) (2) For an electronic version of the PQM/ PPQM guideform specifications, please visit: www.GEindustrial.com/ Multilin/specs, fax your request to 905-201-2098 or email to literature.multilin@indsys.ge.com. PQM PQM * * * T20 T1 C PPQM www.enerVista.com 6 See page 275. 823762AF.DWG Ordering A enerVista enabled Inches (mm) 3.47" (88) 7.24" (184) PQM/PPQM Guideform Specifications 9 MOUNTING B * 150 500 1000 (Order code for all options: PQM-T20-C-A) Basic unit with display, all current/voltage/power measurements, 1 RS485 comm port, 1 RS232 comm port Transducer option; 4 isolated analog outputs 0 – 20 mA and 4 – 20 mA, assignable to all measured parameters, 4 – 20 mA analog input, 2nd RS485 comm port Transducer option; 4 isolated analog outputs 0 – 1 mA, assignable to all measured parameters, 4 – 20 mA analog input, 2nd RS485 comm port Control option; 3 additional programmable output relays (total of 4), 4 programmable switch inputs Power analysis option; harmonic analysis, triggered trace memory waveform capture, event record, data logger 1 A – 150 A clamp-on CT for wires 0.47" (12 mm) in diameter 2 A – 500 A clamp-on CT for wires 1.18" (30 mm) in diameter 2 A – 1000 A clamp-on CT for wires 2.13" (54 mm) in diameter Modifications: Accessories: MOD 500: Portable test/carrying case MOD 501: 20 – 60 VDC/20 – 48 VAC control power MOD 504: Removable terminal blocks MOD 505: Detachable faceplate MOD 506: 4-step capacitor bank switching MOD 507: -40 to +60° C temperature operation MOD 508: 269 communication protocol MOD 513: Class 1, division 2 operation MOD 516: PQM remote: base unit only MOD 517: PQM remote: detachable faceplate only PQMPC Windows® software supplied free **RS232 to RS485 convertor 2.25" collar for limited depth mounting RS485 terminating network PQM mounting plate to replace MTM Plus Control Power: 90 – 300 VDC/70 – 265 VAC standard 20 – 60 VDC/20 – 48 VAC (MOD 501) **Required to connect a computer to the PQM RS485 ports www.GEindustrial.com/Multilin