EET PMC-53M-A User Manual
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EET PMC-53M-A User Manual

Digital multifunction meter
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PMC-53M-A
Digital Multifunction Meter
User Manual
Version: V1.2A
July 6, 2021

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Summary of Contents for EET PMC-53M-A

  • Page 1 PMC-53M-A Digital Multifunction Meter User Manual Version: V1.2A July 6, 2021...
  • Page 2 CET Electric Technology This manual may not be reproduced in whole or in part by any means without the express written permission from CET Inc. (CET). The information contained in this manual is believed to be accurate at the time of publication; however, CET assumes no responsibility for any errors which may appear here and reserves the right to make changes without notice.
  • Page 3 CET Electric Technology DANGER Failure to observe the following instructions may result in severe injury or death and/or equipment damage. ➢ Installation, operation and maintenance of the meter should only be performed by qualified, competent personnel that have the appropriate training and experience with high voltage and current devices.
  • Page 4 CET Electric Technology Limited warranty ➢ CET Inc. (CET) offers the customer a minimum of 12-month functional warranty on the meter for faulty parts or workmanship from the date of dispatch from the distributor. This warranty is on a return to factory for repair basis. ➢...

  • Page 5: Table Of Contents

    Table of Contents Chapter 1 Introduction ..........................7 1.1 Overview ............................ 7 1.2 Features ............................7 1.3 PMC-53M-A application in Power and Energy Management Systems ........9 1.4 Getting more information ......................9 Chapter 2 Installation ..........................10 2.1 Appearance ..........................10 2.2 Unit Dimensions ........................
  • Page 6 CET Electric Technology 4.5.1 Max./Min. Log ....................... 35 4.5.2 Max. Demand Log ......................36 4.5.3 SOE Log ......................... 36 4.6 Diagnostics ..........................36 Chapter 5 Modbus Register Map ......................37 5.1 Basic Measurements ........................ 37 5.2 Energy Measurements ......................39 5.2.1 3-Phase Total Energy Measurements ................

  • Page 7: Chapter 1 Introduction

    This manual explains how to use the PMC-53M-A Digital Multifunction Meter. Throughout the manual the term “meter” generally refers to all models. This chapter provides an overview of the PMC-53M-A meter and summarizes many of its key features. Overview The PMC-53M-A Digital Multifunction Meter is CET’s latest offer for the low-cost digital power/energy metering market.
  • Page 8 CET Electric Technology Demand ▪ Demands, Predicted Demands and Max. Demands for kW/kvar/kVA total and per phase Current with Timestamp for This Month (Since Last Reset) and Last Month (Before Last Reset) Setpoints ▪ 9 user programmable setpoints with extensive list of monitoring parameters including Voltage, Current, Power and THD …...

  • Page 9: Pmc-53M-A Application In Power And Energy Management Systems

    CET Electric Technology PMC-53M-A application in Power and Energy Management Systems The PMC-53M-A can be used to monitor Wye or Delta connected power system. Modbus communications allow real-time data, DI status and other information to be transmitted across a RS- 485 network to an Integrated Energy Management system such as PecStar®...

  • Page 10: Chapter 2 Installation

    Chapter 2 Installation Caution Installation of the PMC-53M-A should only be performed by qualified and competent personnel who have the appropriate training and experience with high voltage and current devices. The meter must be installed in accordance with all local and national electrical codes.

  • Page 11: Unit Dimensions

    (14AWG - 22AWG) (12 lb-in) Table 2-1 Terminal Dimensions Mounting The PMC-53M-A should be installed in a dry environment with no dust and kept away from heat, radiation and electrical noise source. Installation steps: ▪ Remove the installation clips from the meter ▪...

  • Page 12: Wiring Connections

    CET Electric Technology Figure 2-4 Panel Cutout Mounting Wiring connections PMC-53M-A can satisfy almost any three phase power systems. Please read this section carefully before installation and choose the correct wiring method for your power system. The following Wiring Modes are supported: ▪...

  • Page 13: 3-Phase 4-Wire (3P4W) Wye Direct Connection With 3Cts

    CET Electric Technology 2.5.1 3-Phase 4-Wire (3P4W) Wye Direct Connection with 3CTs Please consult the serial number label to ensure that the rated system phase voltage is less than or equal to the meter’s rated phase voltage input specification. Set the Wiring Mode to 3P4W. Figure 2-5 3P4W Direct Connection with 3CTs 2.5.2 3-Phase 4-Wire (3P4W) Wye with 3PTs and 3CTs...

  • Page 14: 3-Phase 3-Wire (3P3W) Direct Delta Connection With 3Cts

    CET Electric Technology 2.5.3 3-Phase 3-Wire (3P3W) Direct Delta Connection with 3CTs Please consult the serial number label to ensure that the rated system line voltage is less than or equal to the meter’s rated line voltage input specification. Set the Wiring Mode to 3P3W. Figure 2-7 3P3W Direct Connection with 3CTs 2.5.4 3-Phase 3-Wire (3P3W) Direct Delta Connection with 2CTs...

  • Page 15: 3-Phase 3-Wire (3P3W) Delta With 2Pts And 3Cts

    CET Electric Technology 2.5.5 3-Phase 3-Wire (3P3W) Delta with 2PTs and 3CTs Please consult the serial number label to ensure that the rated PT secondary voltage is less than or equal to the meter’s rated phase voltage input specification. Set the Wiring Mode to 3P3W. Figure 2-9 3P3W Delta with 2PTs and 3CTs 2.5.6 3-Phase 3-Wire (3P3W) Delta with 2PTs and 2CTs...

  • Page 16: 1-Phase 3-Wire (1P3W) Direct Connection With 2Cts

    CET Electric Technology 2.5.7 1-Phase 3-Wire (1P3W) Direct Connection with 2CTs Please consult the Serial Number Label to ensure that the rated system phase voltage is less than or equal to the meter’s rated phase voltage input specification. Set the Wiring Mode to 1P3W. Figure 2-11 1P3W Direct Connection with 2CTs 2.5.8 1-Phase 2-Wire, Uln (1P2W-Uln) Direct Connection with 1CT...

  • Page 17: 1-Phase 2-Wire, Ull (1P2W-Ull) Direct Connection With 1Ct

    1P2W Ull Direct Connection with 1CT Communications Wiring The PMC-53M-A provides one standard RS-485 port which supports the Modbus RTU protocol. Up to 32 devices can be connected on a RS-485 bus. The overall length of the RS-485 cable connecting all devices should not exceed 1200m.

  • Page 18: Digital Output Wiring

    CET Electric Technology Digital Output Wiring The following figure illustrates the Digital Output connections on the PMC-53M-A: Figure 2-16 DO Connections Power Supply Wiring For AC supply, connect the live wire to the L/+ terminal and the neutral wire to the N/- terminal.

  • Page 19: Chapter 3 Front Panel

    CET Electric Technology Chapter 3 Front Panel The PMC-53M-A has a large, easy to read LCD display with backlight and four buttons for data display and meter configuration. This chapter introduces the front panel operations. Figure 3-1 Front Panel Display 3.1.1 LCD Testing...
  • Page 20 CET Electric Technology Figure 3-3 LCD Display The following table shows the special LCD display symbols: Area Label Description Measurement Units for Freq. (Hz), Power (P, Q, S) and THD Power Factor Displacement PF Energy Measurement values...

  • Page 21: Using The Front Panel Buttons

    Table 3-1 Special LCD display symbols Using the Front Panel Buttons The PMC-53M-A’s front panel has been designed with a 4-button user-friendly interface that allows users to quickly scroll through most of the available measurements. The default password is 0000 (four zeros).

  • Page 22: Data Display

    CET Electric Technology Data Display Throughout this document, the phase-to-neutral notations of A/B/C and L1/L2/L3 as well as the phase- to-phase notations of AB/BC/CA and L12/L23/L31 may be used interchangeably for specifying a certain parameter to be a phase-to-neutral or phase-to-phase value, respectively. The following sections illustrate the available measurements for each display option.
  • Page 23 CET Electric Technology 1,4,5 1,3,4,5 Display 7 2,4,5 2,3,4,5 Display 8 U1 Angle U2 Angle U3 Angle 3,4,5 Display 9 I1 Angle I2 Angle I3 Angle 2,4,5 2,3,4,5 Display 10 U1 Fund. U2 Fund. U3 Fund. 3,4,5 Display 11 I1 Fund. I2 Fund.

  • Page 24: Energy

    CET Electric Technology 3.3.3 Energy Display Screens Display 1 kWh Imp Display 2 kWh Exp Display 3 T1 kWh Imp Display 4 T1 kWh Exp Display 5 kWh Net Display 6 kWh Total Display 7 kvarh Imp Display 8 kvarh Exp Display 9 kvarh Net Display 10...

  • Page 25: Setup Configuration Via The Front Panel

    CET Electric Technology Notes: 1) This screen is not shown if the Wiring Mode is set to 1P3W. 2) This screen is not shown if the Wiring Mode is set to 1P2W L-N or 1P2W L-L. 3) When the Wiring Mode is 1P2W L-L, the phase A Voltage THD Max. of This/Last Month (Since/Before Last Reset) means phase AB Voltage THD Max.

  • Page 26: Setup Menu

    CET Electric Technology 3.4.2 Setup Menu Figure 3-4 Setup Menu...

  • Page 27: Configuration

    CET Electric Technology 3.4.3 Configuration The Setup Configuration mode provides access to the following setup parameters: Label Parameters Description Range Default Menu Main PROGRAMMING Programming Setup Configuration PASSWORD Password Enter Password 0 to 9999 Enter Sub Menu to change PASS SET YES/NO password? NEW PASS...
  • Page 28 CET Electric Technology Clear the 3-Ø Total and Per- CLR ENGY Clear Energy YES/NO Phase Energy registers Clear Clear Max./Min. Log of This CLR MXMN YES/NO Max./Min. Logs Month (Since Last Reset) Clear Max. Demand of This CLR DMD Clear Demand YES/NO Month (Since Last Reset) Clear DI...
  • Page 29 CET Electric Technology Figure 3-5 PF Convention There are two ways to calculate kVA: kvar Mode V (Vector method): total total total Mode S (Scalar method): total There are two ways to calculate THD: THDf (based on Fundamental): where I represents the RMS value for the n harmonic and I represents the RMS value of the...

  • Page 30: Chapter 4 Applications

    Please refer to Section 4.4 for a detailed description. Since there are multiple ways to trigger the Digital Outputs on the PMC-53M-A, a prioritized scheme has been developed to avoid conflicts between different applications. In general, Front Panel Control has the highest priority and can override other control schemes.

  • Page 31: Power And Energy

    Demand is defined as the average power consumption over a fixed interval (usually 15 minutes) based on the sliding window method. The PMC-53M-A provides Present Demand and Predicted Demand for Ia, Ib, Ic, kW Total, kvar Total and kVA Total. Predicted Demand is typically used for pre-alarming and to help users reduce power consumption using a Setpoint to warn that the Demand limit may be exceeded.

  • Page 32: Power Quality

    The PMC-53M-A provides the following PQ parameters: 4.3.2.1 Harmonics The PMC-53M-A provides harmonic analysis for THD, TOHD, TEHD and individual harmonics up to the order. All harmonic parameters are available on the front panel and through communications. In addition, the PMC-53M-A also provides TDD, K-factor and Crest-factor measurements for current.

  • Page 33: Unbalance

    Table 4-6 Symmetrical Parameters Setpoints The PMC-53M-A comes standard with 9 user programmable setpoints which provide extensive control by allowing a user to initiate an action in response to a specific condition. Typical setpoint applications include alarming, fault detection and power quality monitoring.
  • Page 34 CET Electric Technology Figure 4-1 Over Setpoint Figure 4-2 Under Setpoint Setpoints can be programmed via the Front Panel or through communications and have the following setup parameters: Setup Parameter Definition Options/Default* 0=Disabled* Setpoint Type Over or Under Setpoint. 1=Over Setpoint 2=Under Setpoint Setpoint Specify the parameter to be monitored.

  • Page 35: Logging

    Logging 4.5.1 Max./Min. Log The PMC-53M-A records the Max. Log and Min. Log of This Month (Since Last Reset) and Last Month (Before Last Reset) with timestamp for 44 parameters. Each log includes the relevant parameter value and its timestamp. The recorded data is stored in non-volatile memory and will not suffer any loss in the event of a power failure.

  • Page 36: Max. Demand Log

    Table 4-11 Max. Demand Log 4.5.3 SOE Log The PMC-53M-A’s SOE Log can store up to 100 events such as Power-on, Power-off, Digital Input status changes, Digital Output status changes, Setup changes and Setpoint events in its non-volatile memory. Each event record includes the event classification, its relevant parameter values and a timestamp in ±1 ms resolution.

  • Page 37: Chapter 5 Modbus Register Map

    PMC-53M-A to facilitate the development of 3 party communications driver for accessing information on the PMC-53M-A. For a complete Modbus Protocol Specification, please visit http://www.modbus.org. The PMC-53M-A supports the following Modbus functions: 1) Read Holding Registers (Function Code 0x03)
  • Page 38 CET Electric Technology 0096 DI Status UINT16 0097 Reserved UINT16 0098 DO Status UINT16 0099 Reserved UINT16 0100 Setpoint Status UINT16 0101 Wiring Diagnostic Status UINT16 0102 SOE Log Pointer UINT32 0104 Device Operating Time UINT32 x0.1 0.1Hour 0106~0111 Reserved UINT32 0112 Phase A Fundamental kW...

  • Page 39: Energy Measurements

    CET Electric Technology 6) The PMC-53M-A has one SOE Log. The log has a Log Pointer that indicates its current logging position. The range of the Log Pointer is between 0 and 0xFFFFFFFF, and it is incremented by one for every new log generated and will roll over to 0 if its current value is 0xFFFFFFFF. A value of zero indicates that the SOE does not contain any Log.

  • Page 40: Phase C (L3) Energy Measurements

    CET Electric Technology Register Property Description Format Scale Unit 0740 kWh Import INT32 0742 kWh Export INT32 0744 kWh Net INT32 0746 kWh Total INT32 0748 kvarh Import INT32 0750 kvarh Export INT32 kvarh 0752 kvarh Net INT32 x0.01 0754 kvarh Total INT32 0756...

  • Page 41: Current Harmonic Measurements

    CET Electric Technology 1330 Voltage Unbalance Float 1332 Current Unbalance Float Table 5-9 Power Quality Measurements Notes: 1) When the Wiring Mode is 1P2W L-N or 1P2W L-L, the Ib/Ic TDD/TDD Odd/TDD Even/K-factor/Crest- factor have no meaning, and their registers are reserved. 2) When the Wiring Mode is 1P3W, the Ic TDD/TDD Odd/TDD Even/K-factor/Crest-factor have no meaning, and their registers are reserved.

  • Page 42: Demands

    CET Electric Technology Demands 5.5.1 Present Demands Register Property Description Format Scale Unit 3000 Float 3002 Float 3004 Float 3006 kW Total Float 3008 kvar Total Float 3010 kVA Total Float Table 5-12 Present Demand Measurements Notes: 1) When the Wiring Mode is 1P2W L-N or 1P2W L-L, the Ib/Ic Present Demand have no meaning, and their registers are reserved.

  • Page 43: Demand Data Structure

    CET Electric Technology 2) When the Wiring Mode is 1P3W, the Ic Max. Demand of Last Month (Before Last Reset) has no meaning, and its register is reserved. 5.5.5 Demand Data Structure Offset Description High Year - 2000 Month High Hour High Minute...

  • Page 44: Min. Log Of This Month (Since Last Reset)

    CET Electric Technology Notes: 1) When the Wiring Mode is 1P2W L-N or 1P2W L-L, the Phase B and Phase C Max. measurements of This Month (Since Last Reset) have no meaning, and their registers are reserved. 2) When the Wiring Mode is 1P3W, the Phase C Max. measurements of This Month (Since Last Reset) have no meaning, and their registers are reserved.

  • Page 45: Min. Log Of Last Month (Before Last Reset)

    CET Electric Technology 4612~4617 Structure 4618~4623 Uln Average 4624~4629 4630~4635 4636~4641 4642~4647 Ull Average 4648~4653 4654~4659 4660~4665 4666~4671 I Average 4672~4677 4678~4683 4684~4689 4690~4695 kW Total 4696~4701 kvara 4702~4707 kvarb 4708~4713 kvarc 4714~4719 kvar Total 4720~4725 kVAa 4726~4731 kVAb 4732~4737 kVAc 4738~4743 kVA Total...

  • Page 46: Max./Min. Log Structure

    CET Electric Technology 4978~4983 4984~4989 4990~4995 kW Total 4996~5001 kvara 5002~5007 kvarb 5008~5013 kvarc 5014~5019 kvar Total 5020~5025 kVAa 5026~5031 kVAb 5032~5037 kVAc 5038~5043 kVA Total 5044~5049 5050~5055 5056~5061 5062~5067 PF Total 5068~5073 Frequency 5074~5079 In (Calculated) 5080~5085 Uan/Uab THD 5086~5091 Ubn/Ubc THD 5092~5097...
  • Page 47 CET Electric Technology 10048~10055 Event 7 10056~10063 Event 8 10064~10071 Event 9 10072~10079 Event 10 10080~10087 Event 11 10088~10095 Event 12 … … 10792~10799 Event 100 Table 5-22 SOE Log Notes: 1) SOE Log Data Structure Offset Property Description Unit High-order Byte: Event Classification See Table 5-24 Low-order Byte: Sub-Classification...
  • Page 48 CET Electric Technology Active/Return 1 / 0 Over Voltage THD Setpoint Active/Return 1 / 0 Over Voltage TOHD Setpoint Active/Return 1 / 0 Over Voltage TEHD Setpoint Active/Return 1 / 0 Over Current THD Setpoint Active/Return 1 / 0 Over Current TOHD Setpoint Active/Return 1 / 0 Over Current TEHD Setpoint Active/Return Over Voltage Unbalance Setpoint...

  • Page 49: Device Setup

    CET Electric Technology Setup Changed via Front Panel 16~29 Reserved Clear 3-Ø Total and Per-Phase Energy Registers via Communication Reserved Reserved Clear Max. Demand of This Month (Since Last Reset) via Communication Clear All Demand Registers via Communication Clear Max./Min. Logs of This Month (Since Last Reset) via Communication Clear All Max./Min.

  • Page 50: I/O Setup (Optional)

    CET Electric Technology There are two ways to calculate THD:    THDf (based on Fundamental): where I represents the RMS value for the n harmonic and I represents the RMS value of the Fundamental harmonic.    THDr (based on RMS): ...

  • Page 51: Setpoints Setup

    Trigger Action 1 UINT16 0* to 2 6589 Trigger Action 2 UINT16 Table 5-28 Setpoint Setup Parameters Notes: 1) The PMC-53M-A provides the following setpoint parameters: Parameter Parameter Parameter None PF Total Voltage TEHD Uln (Any Phase Voltage) kW Total Present Demand...

  • Page 52: Time

    Time There are two sets of Time registers supported by the PMC-53M-A – Year / Month / Day / Hour / Minute / Second (Registers # 60000 to 60002) and UNIX Time (Register # 60004). When sending time to the PMC-53M-A over Modbus communications, care should be taken to only write one of the two Time register sets.

  • Page 53: Meter Information

    140110 means 60223 9823 UINT16 Date: Month January 10, 2014 Firmware Update 60224 9824 UINT16 Date: Day e.g. 1701030100 means the 100 PMC-53M-A 60225 9825 Serial Number UINT32 that was manufactured on January 3 , 2017 60227 9827 Reserved UINT16 60228...
  • Page 54 CET Electric Technology Notes: 1) The Meter Model appears from registers 60200 to 60219 and contains the ASCII encoding of the string “PMC-53M-A” as shown in the following table. Register Value(Hex) ASCII 60200 0x50 60201 0x4D 60202 0x43 60203 0x2D...

  • Page 55: Appendix A Technical Specifications

    CET Electric Technology Appendix A Technical Specifications Voltage Inputs (V1, V2, V3, VN) 400ULN/690ULL* Range 10V to 1.2xUn Overload 1.2xUn continuous, 2xUn for 1s Burden <0.02VA per phase Measurement Category CAT III up to 600V Frequency 45-65Hz Current Inputs (I11, I12, I21, I22, I31, I32) 5A (5A/1A Auto-Scaling) Range 0.1% to 200% In...
  • Page 56 CET Electric Technology Accuracy Parameters Accuracy Resolution Voltage ±0.2% Reading + 0.05% F.S. 0.001V Current ±0.2% Reading + 0.05% F.S. 0.001A kW, kvar, kVA ±0.5% Reading + 0.05% F.S. 0.001kX kWh, kVAh IEC 62053-22 Class 0.5S 0.01kXh kvarh IEC 62053-23 Class 2 0.01kvarh ±0.5% 0.001...

  • Page 57: Appendix B Standards Compliance

    CET Electric Technology Appendix B Standards Compliance Safety Requirements CE LVD 2014 / 35 / EU EN 61010-1: 2010, EN 61010-2-030: 2010 cULus Listed UL 61010-1 Ed. 3 CAN/CSA C22.2 NO. 61010-1-12 Ed. 3 UL 61010-2-030 Ed. 2 CSA C22.2 NO. 61010-2-030: 18 Ed. 2 UL 61010-2-201 Ed.

  • Page 58: Appendix C Maintenance

    CET Electric Technology Appendix C Maintenance Overview Caution Do not open the meter case. Do not attempt to repair any components of the meter. Failure to follow these instructions can result in equipment damage. The meter does not contain any user-serviceable parts. If the meter requires service, contact your local representative.
  • Page 59 Select whether to create a desktop icon and click Next to continue. Click Install to start the installation. Click Finish to complete the installation Use the Serial to USB line to connect the PMC-53M-A’s COM Port with PC. Double click the desktop icon to open the PMC-Upgrader and select Serial connection.
  • Page 60 CET Electric Technology Setup Serial parameters, please refer to figure below. After clicking Upgrade, the connection with the PMC-53M-A will be established and then the parameters backup will be processed automatically. The entire firmware upgrade process may take about two minutes, please do not...
  • Page 61 CET Electric Technology Confirm the PMC-53M-A's firmware version via its front panel. Press <Harm/ > for more than 2 seconds enters the Setup Configuration mode. Press <Energy/ > to advance to the Password page. Press <Phase/ > or <Energy/ > to scroll to the INFO sub-menu.

  • Page 62: Appendix D Ordering Guide

    CET Electric Technology Appendix D Ordering Guide...

  • Page 63: Contact Us

    CET Electric Technology Contact us CET Electric Technology Inc. Email: support@cet-global.com Web: www.cet-global.com...

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