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HRW PMAC770 Installation & Operation Manual
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HRW PMAC770 Installation & Operation Manual

Multifunction power meter
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HRW Limited
Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk
PMAC770 Multifunction Power Meter
Installation & Operation Manual
V1.1

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  • Page 1 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk PMAC770 Multifunction Power Meter Installation & Operation Manual V1.1...
  • Page 2 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Danger warning! Danger Danger Danger and and warning! warning! warning! This device can be installed only by professionals. The manufacturer shall not be held responsible for any accident caused by the failure to comply with the instructions in this manual.
  • Page 3 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk CONTENTS CONTENTS CONTENTS CONTENTS 1． General Information..................... 7 2. Order Information......................9 3. Packing list........................11 4. Figure and Terminals....................12 4.1 Dimension......................12 4.2 Installation......................12 4.3 Terminals......................13 5. Connection Mode and Wiring..................20 6.
  • Page 4 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8. Setting..........................39 8.1 Instruction......................39 8.2 Setting Site-map....................41 8.3 METER—Meter Setting Menu................42 8.4 COM—Communication Setting Menu............44 8.5 CLEAR—Clearing Data Menu................44 8.6 RELAY—Relay Setting Menu................. 45 8.7 AO—Analog Output Setting Menu (Optional)..........46...
  • Page 5 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 10.4 Harmonic Ratio for Current................58 10.5 Voltage Crest Factor..................58 10.6 Current K Factor.................... 58 10.7 Harmonic Voltage RMS.................59 10.8 Harmonic Current RMS.................59 10.9 Harmonic Power RMS...................59 10.10 Harmonic Energy RMS................
  • Page 6 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 13. Setpoint Alarm......................69 13.1 General Description..................69 13.2 Setpoint Object....................69 13.3 Alarm Condition....................70 13.4 Alarm Output....................70 13.5 Example......................71 14. Auxiliary Function......................72 14.1 Communication....................72 14.1.1 Communication Medium................72...
  • Page 7 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 1 1 1 1 ． ． ． ． General General General Information Information General Information Information PMAC770 Three Phase Multifunction Power Meter is designed for monitoring and displaying all kinds of electricity parameters.
  • Page 8 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Measuring Measuring Function Function Function of of of of PMAC770 PMAC770 PMAC770 Basic Basic Unit Unit Measuring Measuring Function PMAC770 Basic Basic Unit Unit Basic...
  • Page 9 2. 2. 2. 2. Order Order Order Information Information Order Information Information PMAC770－① - - - - ② - - - - ③ – – – – ④ - - - - ⑤ Model Model PMAC770 PMAC770 Model Model No.
  • Page 10 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 120/208V (direct), 5A 240/415V (direct), 5A 277/480V (direct), 5A 63.5/110V (via PT), 5A 120/208V (direct),1 A 240/415V (direct),1 A 277/480V (direct),1 A 63.5/110V (direct),1 A 398/690V(direct), 5A ④...
  • Page 11 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 3. 3. 3. 3. Packing Packing Packing list list Packing list list Packing Packing included: included: Packing Packing box box included: included: PMAC770 Basic Unit ( and optional modules)
  • Page 12 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4. 4. 4. 4. Figure Figure Figure Terminals Terminals Figure and and Terminals Terminals Dimension Dimension 4.1 Dimension Dimension Unit: mm 4. 4. 4. 4.2 2 2 2 Installation...
  • Page 13 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Terminals 4.3 Terminals Terminals Terminals 4.3.1 4.3.1 Terminal Terminal Terminal of of of of Basic Basic Basic Unit Unit 4.3.1 4.3.1 Terminal Basic Unit Unit...
  • Page 14 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk In line, phase B current Out line, phase B current In line, phase C current Out line, phase C current 4.3.2 Terminals Terminals of of of of DI DI DI DI module...
  • Page 15 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4.3.3 Terminals Terminals of of of of DO module (PMAC770-R): 4.3.3 4.3.3 4.3.3 Terminals Terminals DO module module module (PMAC770-R): (PMAC770-R): (PMAC770-R): Relay Relay Output...
  • Page 16 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4.3.4 Terminals Terminals of of of of AO module (PMAC770-AO): 4.3.4 4.3.4 4.3.4 Terminals Terminals AO module module module (PMAC770-AO): (PMAC770-AO): (PMAC770-AO): Analog Analog Output...
  • Page 17 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4.3.5 4.3.5 Terminals Terminals Terminals of of of of AI AI AI AI module module module (PMAC770-AI): (PMAC770-AI): 4.3.5 4.3.5 Terminals module (PMAC770-AI): (PMAC770-AI): Analog...
  • Page 18 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4.3.6 4.3.6 Terminals Terminals Terminals of of of of RS485 RS485 RS485 Module Module (PMAC770-C): (PMAC770-C): 4.3.6 4.3.6 Terminals RS485 Module Module (PMAC770-C): (PMAC770-C): Extend...
  • Page 19 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4.3.7 4.3.7 Terminals Terminals Terminals of of of of Pulse Pulse Pulse Output Output Module Module (PMAC770-EP): (PMAC770-EP): 4.3.7 4.3.7 Terminals Pulse Output Output Module...
  • Page 20 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 5. 5. 5. 5. Connection Connection Connection Mode Mode Wiring Wiring Connection Mode Mode and and Wiring Wiring PMAC770 supports 2 kinds of connection mode: 3P4W and 3P3W..
  • Page 21 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk (2) 3-phas 4-wire, 3PT, 3CT: 3-phas 3-wire, no PT, 3CT:...
  • Page 22 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 3-phas 3-wire , no PT, 2CT: 3-phas 3-wire , 2PT, 3CT:...
  • Page 23 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 3-phas 3-wire, 2PT, 2CT:...
  • Page 24 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 6 6 6 6 ..Display Display Display Key-press Key-press Operation Operation Display and and Key-press Key-press Operation Operation 6 6 6 6 .1 .1 .1 .1 Display...
  • Page 25 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 6 6 6 6 .2 .2 .2 .2 Keys Keys Keys Keys 6.2.1. 6.2.1. General General Information Information 6.2.1. 6.2.1. General General Information Information PMAC770 has a back-light LCD, user-friendly display.
  • Page 26 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 6 6 6 6 .3 .3 .3 .3 Map Map of of of of Display Display Data Display Display Data Data Data Power On Analog input...
  • Page 27 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 7. 7. 7. 7. Query Query Query Procedure Procedure Query Procedure Procedure 7 7 7 7 .1 .1 .1 .1 Initial Initial Initial Display Display...
  • Page 28 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 7 7 7 7 .2 .2 .2 .2 Voltage Voltage Value Voltage Voltage Value Value Value Press key F1 × 1 Average Vph-N Menu Menu...
  • Page 29 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Record Record Record Record of of of of Voltage Voltage Voltage Voltage Deviation Deviation Deviation Deviation Menu Menu Prompt: Prompt: Menu Menu Prompt: Prompt: UP: Page up to previous record...
  • Page 30 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 7 7 7 7 .3 .3 .3 .3 Current Current Value Current Current Value Value Value Menu Menu Menu Menu Prompt: Prompt: Prompt: Prompt: UNBAL: Positive (I-2), Negative (I-1), Neutral (I-0) Max.: Max.
  • Page 31 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 7 7 7 7 .4 .4 .4 .4 Frequency Frequency Frequency Frequency Menu Menu Menu Menu Prompt: Prompt: Prompt: Prompt: REC: Frequency deviation record Record...
  • Page 32 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 7 7 7 7 .5 .5 .5 .5 Power Power Value Power Power Value Value Value Menu Menu Prompt: Prompt: Menu Menu Prompt: Prompt: P: Active power, per phase & total Q: Reactive power, per phase &...
  • Page 33 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Energy 7.6 Energy Energy Energy Total kWh Menu Menu Menu Menu Prompt: Prompt: Prompt: Prompt: KWH: Total kWh, Phase A/ B/ C kWh (Imp. & Exp) KVARH: Total kvarh, Phase A/ B/ C kvarh (Imp.
  • Page 34 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Import Import kWh, kWh, tariff-1 tariff-1 Import Import kWh, kWh, tariff-1 tariff-1...
  • Page 35 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Harmonic 7.7 Harmonic Harmonic Harmonic Harmonic display THD for V Menu Prompt: Menu Menu Menu Prompt: Prompt: Prompt: THD: THD: THD: THD: THD for V (or I)
  • Page 36 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Voltage crest factor Current K factor Total kWh of fundamental...
  • Page 37 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Demand 7.8 Demand Demand Demand Demand menu Menu Menu Menu Menu Prompt: Prompt: Prompt: Prompt: IA: Max. demand for Ia & time stamp IB: Max. demand for Ib & time stamp IC: Max.
  • Page 38 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Analog Input (Optional) 7.9 Analog Analog Analog Input Input Input (Optional) (Optional) (Optional) Analog input menu: (If PMAC770 add the AI module, it will has this menu)
  • Page 39 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 ..Setting Setting Setting Setting 8 8 8 8 .1 .1 .1 .1 Instruction Instruction Instruction Instruction In initial display, we can see the “SET” prompt, press F4 to SETUP menu.
  • Page 40 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk After go into each setting menu, there is a prompt “CODE”, it means User need to enter the correct password. Default password is “0001” Super password is “2011”...
  • Page 41 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 .2 .2 .2 .2 Setting Setting Site-map Setting Setting Site-map Site-map Site-map...
  • Page 42 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 .3 .3 .3 .3 METER METER METER— — — — Meter Meter Setting Menu METER Meter Meter Setting Setting Setting Menu...
  • Page 43 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk...
  • Page 44 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 .4 .4 .4 .4 COM COM— — — — Communication Communication Setting Menu Communication Communication Setting Setting Setting Menu Menu Menu 8 8 8 8 .5 .5 .5 .5 CLEAR...
  • Page 45 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 .6 .6 .6 .6 RELAY RELAY RELAY— — — — Relay Relay Setting Menu RELAY Relay Relay Setting Setting Setting Menu...
  • Page 46 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 .7 .7 .7 .7 AO AO— — — — Analog Analog Output Setting Menu (Optional) Analog Analog Output Output Output Setting...
  • Page 47 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 8 8 8 8 .9 .9 .9 .9 ERROR ERROR ERROR ERROR...
  • Page 48 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 9. 9. 9. 9. Measuring Measuring Measuring Function Function Description Description Measuring Function Function Description Description Parameter Parameter Accuracy Accuracy Resolution Resolution Measuring Measuring Range...
  • Page 49 PTs, it can be input directly. While measuring other higher voltage, PMAC770 need external PTs. If PMAC770 is connected via PTs, the PTs direct affect the measurement accuracy of the meter. So, users should consider the linearity and accuracy rate of PTs.
  • Page 50 Current Only when adopt CTs can PMAC770 measures current. CT secondary rated output must comply with rated current input of PMAC770 (5A or 1A). When connecting external CTs, users must make sure the current is not open circuit. Otherwise, primary excitation will generate high voltage at secondary circuit, causing personal injury or death and equipment damage.
  • Page 51 Active Active power power power PMAC770 calculates three phase active power and total active power: Pa, Pb, Pc, and Ptot Measuring range: per phase 0~ 649.9MW, total: 0~ 1949.8MW. 9. 9. 9. 9.4 4 4 4 Reactive Reactive Reactive...
  • Page 52 Power factor factor factor PMAC770 measures per phase power factor and total power factor: PFa, PFb, PFc and PFtot. Measuring range: -1.000 to +1.000. Like active / reactive power value, the wiring and CTs terminals connecting will affect actual calculated value of power factor.
  • Page 53 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 9. 9. 9. 9.7 7 7 7 Frequency Frequency Frequency Frequency In different connection modes, PMAC770 samples the system frequency from different channels. In 3-phase 3-wire connection mode, PMAC770 samples the frequency from line AB voltage channel.
  • Page 54 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Max. Max. Max. Max. Demand: Demand: Demand: Demand: In nonvolatile memory, PMAC770 maintains a running maximum for power and current demand values with date & time stamp, called “Max. Demand”.
  • Page 55 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Wrong! Phase B and C same Wrong! Phase A and B opposite Note: Only after provide 3 phase voltage and current signal to the meter can it detect...
  • Page 56 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 10..Power Power Power Quality Quality Analysis Analysis Power Quality Quality Analysis Analysis Item Item Measuring Measuring Accuracy Accuracy Item Item Measuring...
  • Page 57 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 10.1 General Description 10.1 10.1 10.1 General General General Description Description Description Harmonics are any “non-linear” current or voltage in an electrical distribution system. With these harmonics flowing into the power system, it will affect the reliability of the...
  • Page 58 Current K K K K Factor Factor Factor Factor PMAC770 measures 3 phase current K factor, data resolution: 0.001. If no current input, the K Factor value is 0. Users can read K Factor value from the LCD or communication. K Factor Formula:...
  • Page 59 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 10.7 Harmonic Voltage 10.7 10.7 10.7 Harmonic Harmonic Harmonic Voltage Voltage Voltage RMS PMAC770 measures 0 ~31 harmonic voltage RMS, data resolution: 0.01V. Users can read every order of harmonic voltage RMS from the LCD or communication.
  • Page 60 When the real-time frequency deviation is out of limit, PMAC770 will record the event with time stamp, its duration time and the Peak value. PMAC770 can store 30 events log for frequency deviation.
  • Page 61 When the real-time voltage unbalance is out of limit, PMAC770 will record the event with time stamp, its duration time and the Peak value. PMAC770 can store 30 events log for voltage unbalance. Meanwhile, PMAC770 also records the Peak unbalance in present day/ month/ history.
  • Page 62 According to the direction of power, PMAC770 calculates 4 quadrant kWh/ kvarh, and statics multi-tariff energy and history energy data, PMAC770 accumulates the energy value since it was powered on at the first time. (In case that users clear the energy to 0, the meter will re-accumulate the energy from 0) Until the value reach 99,999,999.9 kWh/ kvarh, it will auto-turnover.
  • Page 63 PMAC770 statistics the import/ export kWh and import/ export kWh in different tariff. PMAC770 supports 2 tariff lists. Users can set the 2 lists separately. Each tariff list can be set max. 8 periods in one day and 4 different tariff (F1, F2, F3, F4 means 4 kinds of tariff, and F1 for Sharp, F2 for Peak, F3 for Flat, F4 for Valley).
  • Page 64 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 3rd period 12:00 (to 14:00) 4th period 14:00 (to 20:00) 5th period 20:00 (to 06:00 of next day) There are 2 modes to calculate the multi-tariff energy: Date Mode and Holiday Mode.
  • Page 65 Description Description In order to facilitate users to do various fault analysis, PMAC770 provides up to 100 records of SOE event and 30 records of over-limit event for frequency deviation/ voltage deviation/ voltage unbalance. Users can easily and quickly position seeking the fault from the SOE event counter.
  • Page 66 Voltage Deviation Deviation Record Record User can set the voltage deviation over-limit value in PMAC770 (default limit: 10%, setting range: 0~99.99%).When the ︱voltage deviation︱> limit, PMAC770 records the deviation starting time, ending time, and the Max. deviation (value with sign).
  • Page 67 Unbalance Record Record Record User can set the voltage unbalance over-limit value in PMAC770 (default limit: 20%, setting range: 0~100%).When unbalance > limit, PMAC770 records the unbalance starting time, ending time, and the Max. unbalance value. Users can find the record from panel and communication.
  • Page 68 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk When the instant demand exceeds the history maximum demand, PMAC770 will record the new maximum data with time stamp. User can clear the Max. demand record from panels and communication.
  • Page 69 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Setpoint Setpoint Alarm Alarm 13. Setpoint Setpoint Alarm Alarm 1 1 1 1 3 3 3 3 .1 .1 .1 .1 General General General Description...
  • Page 70 After set the monitoring object, users need to set the alarm condition, i.e. set the over/ PMAC770 PMAC770 under limit value. For setting range of the parameter, please refer to PMAC770 PMAC770 Modbus Modbus Register Register...
  • Page 71 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 13.5 Example 13.5 13.5 13.5 Example Example Example Users want to monitor phase A voltage and set the over-limit to 120% Ue, linking with relay 1, set the delay time to 30s. If the actual phase A voltage exceed to the limit and lasting to 30s, then the relay 1 will output the signal.
  • Page 72 14.1 Communication Communication PMAC770 provides one RS485 port in basic module, and provides another one as optional function. The two RS485 ports are independent from each other. Normally, on site, one RS485 is enough. Please refer to below connection diagram.
  • Page 73 Status Input Input Input PMAC770 provides 3 status input as basic feature apply to monitor the ON/ OFF position of breakers or switchers etc.. Besides, it also provides up to 8 optional status input which is flexible to meet different requirement.
  • Page 74 Relay Output Output Output PMAC770 basic unit provides 2 relay output, and Users can add one optional Relay Output Module which provides the other 2 relay output. Relay node capacity: 250VAC/5A. There are 2 kinds of relay control mode: Local control and Remote control.
  • Page 75 The action of relay is different in two modes. So, users should firstly distinguish the relay is in remote control mode or in local control mode. The default relay control mode of PMAC770 is remote control. Users can change the mode by keys on panel or via communication.
  • Page 76 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 14.4 4 4 4 4~20mA 4~20mA Analog Input (optional module) 4~20mA 4~20mA Analog Analog Analog Input Input Input (optional (optional (optional module) module) module) In some projects, for example where request to monitor the main transformers, to measure the non-electric parameters such as the temperature or pressure, users can choose one AI module.
  • Page 77 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk 4~20mA analog output. Output maximum load is 500 ohm, output range is 4~20mA, overload: 1.2 times. The analog output channels can be defined to associate with various parameters include 3-phase voltage (ph-ph, or ph-N), 3-phase current, total active power, total reactive power, total power factor, frequency etc.
  • Page 78 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk In above formula: In above formula: is rated voltage (ph-ph). is the real measurement of analog value, is rated current unit: mA. is the rated power, unit: W or var.
  • Page 79 14.7.1 14.7.1 Install Install This Memory Module can be directly inserted to the extend interface of PMAC770 basic unit. After insert the memory module, the meter should be restarted to recognize the memory function. Before insert or pull out the Memory Module, users should power off the meter.
  • Page 80 Description 14.7.3 14.7.3 Function Function Description Description The memory module works with the PMAC770 basic unit to save the measured data regularly (interval: 5 min). The save cycle is one year. It saves the parameters as below: � 3-phase voltage �...
  • Page 81 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Technical Technical Specification Specification 15. Technical Technical Specification Specification Metering Metering Metering Metering True RMS, 1 sec refresh time Rated current : 1A or 5A...
  • Page 82 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Starting Starting Starting Starting current current current current 0.1%I Power Power Power Power frequency frequency frequency frequency AC 2KV/minute withstand withstand withstand withstand voltage voltage...
  • Page 83 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Storage temperature: -40℃~ +70 ℃ Environment Environment Environment Environment Humidity: 5%~95% non-condensing Parameter Parameter Parameter Parameter Accuracy Accuracy Accuracy Accuracy Resolution Resolution Resolution Resolution Measuring...
  • Page 84 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Item Standard Level Item Item Item Standard Standard Standard Level Level Level Oscillatory waves immunity test IEC61000-4-12:1995 Electrostatic discharge immunity IEC61000-4-2:2001 Radiated,radio-frequency,Electromagne field IEC61000-4-3:1998 immunity test...
  • Page 85 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Maintenance Maintenance Trouble Trouble Shooting Shooting 16. Maintenance Maintenance and and Trouble Trouble Shooting Shooting Possible Possible Possible Possible problem problem problem problem Possible cause...
  • Page 86 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Check if the connection mode has been set correctly. The power Check if the phase sequence measurement is not corresponding to the voltage and the correct.
  • Page 87 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Check the setting of the operating time of The operating time the relay. For the specific information, has not been set refer to the content regarding relays of correctly.
  • Page 88 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk The communication link has not been Check if the 120-Ohm resistor has been connected to the connected. terminal resistor. The communication Check if the communication-shielding link suffers layer has been earthed effectively.
  • Page 89 HRW Limited Ph +852 2546 7402 - Fax +852 2546 7403 - admin@hrw.hk - www.hrw.hk Notice: Notice: Notice: Notice: � PILOT reserves the right to modify this manual without prior notice in view of continued improvement. � Technical Consulting: +86 15916202620 �...