CET PMC-53A User manual

PMC-53A
Intelligent Multifunction Meter
User Manual
Version: V1.2A
September 12, 2018

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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. Please consult CET or your local representative for
the latest product specifications.
Standards Compliance
DANGER
This symbol indicates the presence of danger that may result in severe injury or death and
permanent equipment damage if proper precautions are not taken during the installation,
operation or maintenance of the device.
CAUTION
This symbol indicates the potential of personal injury or equipment damage if proper
precautions are not taken during the installation, operation or maintenance of the device.

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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. The meter must
be installed in accordance with all local and national electrical codes.

Ensure that all incoming AC power and other power sources are turned OFF
before performing any work on the meter.

Before connecting the meter to the power source, check the label on top of
the meter to ensure that it is equipped with the appropriate power supply, and
the correct voltage and current input specifications for your application.

During normal operation of the meter, hazardous voltages are present on its
terminal strips and throughout the connected potential transformers (PT) and
current transformers (CT). PT and CT secondary circuits are capable of
generating lethal voltages and currents with their primary circuits energized.
Follow standard safety precautions while performing any installation or service
work (i.e. removing PT fuses, shorting CT secondaries, …etc).

Do not use the meter for primary protection functions where failure of the
device can cause fire, injury or death. The meter should only be used for
shadow protection if needed.

Under no circumstances should the meter be connected to a power source if
it is damaged.

To prevent potential fire or shock hazard, do not expose the meter to rain or
moisture.

Setup procedures must be performed only by qualified personnel familiar with
the instrument and its associated electrical equipment.
DO NOT open the instrument under any circumstances.

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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.

CET does not accept liability for any damage caused by meter malfunctions. CET
accepts no responsibility for the suitability of the meter to the application for
which it was purchased.

Failure to install, set up or operate the meter according to the instructions herein
will void the warranty.

Only CET’s duly authorized representative may open your meter. The unit should
only be opened in a fully anti-static environment. Failure to do so may damage
the electronic components and will void the warranty.

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Table of Contents
Chapter 1 Introduction.............................................................................................................................8
1.1 Overview ....................................................................................................................................8
1.2 Features......................................................................................................................................8
1.3 PMC-53A’ application in Power and Energy Management Systems.........................................11
1.4 Getting more information ........................................................................................................11
Chapter 2 Installation .............................................................................................................................12
2.1 Appearance ..............................................................................................................................12
2.2 Unit Dimensions .......................................................................................................................13
2.3 Terminal Dimensions................................................................................................................13
2.4 Mounting..................................................................................................................................13
2.5 Wiring connections ..................................................................................................................14
2.5.1 3-Phase 4-Wire (3P4W) Wye Direct Connection with 3CTs ..........................................15
2.5.2 3-Phase 4-Wire (3P4W) Wye Direct Connection with 4CTs ..........................................15
2.5.3 3-Phase 4-Wire (3P4W) Wye with 3PTs and 3CTs .........................................................15
2.5.4 3-Phase 4-Wire (3P4W) Wye with 3PTs and 4CTs .........................................................16
2.5.5 3-Phase 3-Wire (3P3W) Direct Delta Connection with 3CTs .........................................16
2.5.6 3-Phase 3-Wire (3P3W) Direct Delta Connection with 2CTs .........................................17
2.5.7 3-Phase 3-Wire (3P3W) Delta with 2PTs and 3CTs........................................................17
2.5.8 3-Phase 3-Wire (3P3W) Delta with 2PTs and 2CTs........................................................18
2.5.9 1-Phase 3-Wire (1P3W) Direct Connection with 2CTs ..................................................18
2.5.10 1-Phase 2-Wire, Uln (1P2W-Uln) Direct Connection with 1CT ...................................19
2.5.11 1-Phase 2-Wire, Ull (1P2W-Ull) Direct Connection with 1CT......................................19
2.6 Communications Wiring...........................................................................................................20
2.7 Digital or Pulse Input Wiring ....................................................................................................20
2.8 Digital (Relay) Output Wiring ...................................................................................................20
2.9 Pulse Output Wiring .................................................................................................................21
2.10 Analog Input Wiring ...............................................................................................................21
2.11 Analog Output Wiring ............................................................................................................21
2.12 RTD Input Wiring....................................................................................................................22
2.13 Power Supply Wiring ..............................................................................................................22
Chapter 3 Front Panel.............................................................................................................................23
3.1 Using the Front Panel Buttons..................................................................................................23
3.2 Data Display..............................................................................................................................24
3.2.1 U/I .................................................................................................................................24
3.2.2 Power............................................................................................................................25
3.2.3 Energy ...........................................................................................................................25
3.2.4 Demand.........................................................................................................................25
3.2.5 Harmonics.....................................................................................................................25
3.2.6 Max./Min. .....................................................................................................................26
3.2.7 TOU ...............................................................................................................................27
3.2.8 I/O .................................................................................................................................28
3.2.9 SOE................................................................................................................................28

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3.3 Setup Configuration via the Front Panel ..................................................................................28
3.3.1 Making Setup Changes..................................................................................................28
3.3.2 Setup Menu ..................................................................................................................30
3.3.3 Configuration ................................................................................................................31
Chapter 4 Applications ...........................................................................................................................36
4.1 Inputs and Outputs ..................................................................................................................36
4.1.1 Digital Inputs.................................................................................................................36
4.1.2 Digital Outputs..............................................................................................................36
4.1.3 Energy Pulse Outputs....................................................................................................37
4.1.4 Analog Input..................................................................................................................37
4.1.5 Analog Output...............................................................................................................37
4.1.6 RTD Input ......................................................................................................................38
4.2 Power and Energy ....................................................................................................................38
4.2.1 Basic Measurements.....................................................................................................38
4.2.2 Energy Measurements ..................................................................................................39
4.2.3 Interval Energy Measurements.....................................................................................39
4.2.4 Demand Measurements ...............................................................................................39
4.3 Power Quality...........................................................................................................................40
4.3.1 Phase Angles .................................................................................................................40
4.3.2 Power Quality Parameters ............................................................................................40
4.3.3 Unbalance .....................................................................................................................41
4.4 Setpoints ..................................................................................................................................42
4.5 Logging .....................................................................................................................................44
4.5.1 Max./Min. Log...............................................................................................................44
4.5.2 Peak Demand Log .........................................................................................................44
4.5.3 Monthly Energy Log ......................................................................................................45
4.5.4 Daily and Monthly Freeze Log (Optional)......................................................................45
4.5.5 SOE Log .........................................................................................................................46
4.5.6 Data Recorder (DR) Log (Optional)................................................................................46
4.6 Time of Use (TOU) ....................................................................................................................47
4.7 Diagnostics ...............................................................................................................................48
Chapter 5 Modbus Register Map............................................................................................................49
5.1 Basic Measurements ................................................................................................................49
5.2 Energy Measurements .............................................................................................................51
5.2.1 3-Phase Total Energy Measurements............................................................................51
5.2.2 Phase A (L1) Energy Measurements .............................................................................52
5.2.3 Phase B (L2) Energy Measurements..............................................................................53
5.2.4 Phase C (L3) Energy Measurements..............................................................................54
5.2.5 Interval Energy Measurements.....................................................................................55
5.3 DI Pulse Counters .....................................................................................................................55
5.4 Harmonic Measurements.........................................................................................................55
5.4.1 Power Quality Measurements ......................................................................................55
5.4.2 Current Harmonic Measurements ................................................................................56
5.4.3 Voltage Harmonic Measurements ................................................................................56

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5.5 Demands ..................................................................................................................................56
5.5.1 Present Demands..........................................................................................................57
5.5.2 Predicted Demands.......................................................................................................57
5.5.3 Peak Demand Log of This Month (Since Last Reset) .....................................................57
5.5.4 Peak Demand Log of Last Month (Before Last Reset) ...................................................57
5.5.5 Demand Data Structure ................................................................................................58
5.6 Max./Min. Log ..........................................................................................................................58
5.6.1 Max. Log of This Month (Since Last Reset) ...................................................................58
5.6.2 Min. Log of This Month (Since Last Reset)....................................................................59
5.6.3 Max. Log of Last Month (Before Last Reset) .................................................................60
5.6.4 Min. Log of Last Month (Before Last Reset)..................................................................61
5.6.5 Max./Min. Log Structure...............................................................................................61
5.7 Monthly Energy Log .................................................................................................................62
5.8 Daily and Monthly Freeze Logs (Optional) ...............................................................................63
5.8.1 Daily Freeze Log ............................................................................................................63
5.8.2 Monthly Freeze Log.......................................................................................................63
5.9 SOE Log.....................................................................................................................................64
5.10 Data Recorder Log (Optional).................................................................................................68
5.11 Device Setup...........................................................................................................................68
5.11.1 Basic Setup Parameters...............................................................................................68
5.11.2 I/O Setup.....................................................................................................................70
5.11.3 Communication Setup Parameters .............................................................................72
5.11.4 Setpoints Setup...........................................................................................................72
5.11.5 Data Recorder Setup ...................................................................................................73
5.12 TOU Setup ..............................................................................................................................74
5.12.1 Basic............................................................................................................................74
5.12.2 Season.........................................................................................................................75
5.12.3 Daily Profile.................................................................................................................76
5.12.4 Alternate Days.............................................................................................................77
5.13 Time........................................................................................................................................78
5.14 Remote Control ......................................................................................................................78
5.15 Clear/Reset Control................................................................................................................79
5.16 Meter Information..................................................................................................................80
Appendix A Data Recorder Parameter List .............................................................................................82
Appendix B Data Recorder Default Settings ...........................................................................................83
Appendix C BACNet MSTP Implementation ...........................................................................................84
Appendix D N2 Implementation.............................................................................................................89
Appendix E DNP Profile ..........................................................................................................................91
Appendix F Technical Specifications .......................................................................................................99
Appendix G Standards Compliance ......................................................................................................101
Appendix H Ordering Guide .................................................................................................................102
Contact us.............................................................................................................................................103

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Chapter 1 Introduction
This manual explains how to use the PMC-53A Intelligent Multifunction Meter. Throughout the manual
the term “meter” generally refers to all models.
This chapter provides an overview of the PMC-53A meter and summarizes many of its key features.
1.1 Overview
The PMC-53A Intelligent Multifunction Meter is CET’s latest offer for the low-cost digital power/energy
metering market. The PMC-53A features quality construction, multifunction measurements and a large,
backlit, Dot-Matrix LCD that is easy to navigate. Housed in a standard DIN form factor measuring
96x96x88mm, it is perfectly suited for industrial, commercial and utility applications. Compliance with
the IEC 62053-22 Class 0.5S Standard, it is a cost effective replacement for analog instrumentation and
is capable of displaying 4 measurements at once. It optionally provides I4 input for Neutral Current
measurement, a second RS485 port, up to six Digital Inputs for status monitoring, pulse counting or
Tariff switching, up to four Relay Outputs for control and alarming applications, up to four Solid State
Relays for energy pulsing as well as other I/O options for different applications.
You can setup the meter through its front panel or via our free PMC Setup software. The meter is also
supported by our PecStar® iEMS Integrated Energy Management System. Following is a list of typical
applications for the PMC-53A:
Industrial, Commercial and Utility Substation Metering
Building, Factory and Process Automation
Sub-metering and Cost Allocation
Energy Management and Power Quality Monitoring
Contact CET Technical Support at [email protected] should you require further assistance with
your application.
1.2 Features
Ease of use
Large, backlit, Dot-Matrix LCD display with wide viewing angle
Intuitive user interface
LED indicators for Energy Pulsing and Communication activities
Password-protected setup via front panel or free PMC Setup software
Easy installation with mounting clips, no tools required
Basic Measurements (True RMS)
ULN, ULL per phase and Average
Current per phase and Average with calculated Neutral
kW, kvar, kVA, PF per phase and Total
kWh, kvarh Import / Export / Net / Total and kVAh Total
Frequency
Device Operating Time (Running Hours)
Optional I4 measurements
Calculated Residual Current Ir (with optional I4 Input)

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Advanced Measurements
1-Cycle Real-time U & I Waveform Display @ 1s update rate
U and I THD, TOHD, TEHD and Individual Harmonics up to 31st
Current TDD, TDD Odd, TDD Even, K-Factor and Crest Factor
U and I Unbalance and Phase Angles
Displacement PF
Fundamental U, I and kW per phase
Total Fundamental kW & Total Harmonic kW*
U and I Symmetrical (Sequence) Components*
kvarh Q1-Q4
Interval Energy for kWh/kvarh Imp/Exp and kVAh
Demands, Predicted Demands and Peak Demands for kW/kvar/kVA Total and per phase Current
with Timestamp for This Month (or Since Last Reset) and Last Month (or Before Last Reset)
Two TOU schedules, each providing
o12 Seasons
o20 Daily Profiles, each with 12 Periods in 15-minute interval
o90 Holidays or Alternate Days
o8 Tariffs, each providing the following information
·kWh/kvarh Import/Export, kVAh
·kW/kvar/kVA Max. Demands
12 Monthly Energy Logs of kWh/kvarh Import/Export/Total/Net, kVAh, kvarh Q1-Q4 as well as
kWh/kvarh Import/Export and kVAh per Tariff
*Available in Firmware V1.00.03 or later
Setpoints
9 user programmable Setpoints with extensive list of monitoring parameters including Voltage,
Current, Power and THD, etc.
Configurable thresholds, time delays and DO triggers
SOE Log
100 events time-stamped to ±1ms resolution
Recording events for Setup changes, Setpoint and DI status changes as well as DO operations
Max/Min Log
Max./Min. Log with timestamp for parameters such as Voltage, Current, In (calculated), I4, Ir,
Frequency, kW, kvar, kVA, PF, Unbalance, K-Factor, Crest-Factor and THD
Configurable for This Month/Last Month or Since/Before Last Reset
Freeze Logs (Optional)
60 Daily Freeze Logs for kWh/kvarh/kVAh Total and kW/kvar/kVA Peak Demands.
36 Monthly Freeze Logs for kWh/kvarh/ kVAh Total and kW/kvar/kVA Peak Demands with
Timestamp.
Data Recorder Log (Optional)
5 Data Recorders of 16 parameters each for real-time measurements, harmonics, energy, demand,
TOU, Pulse Counters…etc.
Recording interval from 1 minute to 40 days
Configurable capacity up to a max. of 100 days at 15-minute interval

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Diagnostics
Frequency Out-of-Range, Loss of Voltage / Current
kW Direction per phase and Total, Possible Incorrect CT Polarity
Incorrect U & I Phase Sequence
Communications
Optically isolated RS485 port at max. 38,400 bps
Selectable Modbus RTU, BACnet MS/TP*, Metasys N2* and DNP 3.0~
Optional 2nd RS485 port with Modbus RTU support only
*Available in Firmware V1.00.03 or later
~Available in Firmware V1.00.06 or later
Optional Inputs and Outputs
Digital Inputs
oUp to 6 channels, volts free dry contact, 24VDC internally wetted
o1000Hz sampling for status monitoring with programmable debounce
oPulse counting with programmable weight for each channel for collecting WAGES (Water,
Air, Gas, Electricity, Steam) information
oTariff switching based on DI status
Digital Outputs
oUp to 4 Form A mechanical relays for alarming and general purpose control
Pulse Outputs
oUp to 4 Form A Soild State Relays for kWh and kvarh pulsing with Max. Load Voltage @
50VDC and Max. Forward Current @ 50mA
Optional Expansion Modules
Expansion Module A Options
oI4 Input
o2nd RS485 port with optical isolation, supporting Modbus RTU
Expansion Module B Options
o2xDigital Inputs and 2xRelay Outputs
o2xDigital Inputs and 2xSold State Pulse Outputs
o2xRTD Inputs (PT100 sensor not included)
o1xAI and 1xAO (0/4-20mA)
System Integration
Supported by CET’s PecStar® iEMS and iEEM
Modbus RTU for easy integration into 3rd-party Energy Management, Automation or SCADA
systems
BACnet MSTP and Metasys N2 for Building Automation
DNP 3.0 for Utility Substation Automation

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1.3 PMC-53A’application in Power and Energy Management Systems
The PMC-53A can be used to monitor 4P3W (Wye), 3P3W (Delta), 1P2W-Uln, 1P2W-Ull or 1P3W
connected power system. Modbus communications allow real-time data, DI status and other
information to be transmitted across a RS485 network to an Integrated Energy Management system
such as PecStar® iEMS.
1.4 Getting more information
Additional information is available from CET via the following sources:
Visit www.cet-global.com
Contact your local representative
Contact CET Technical Support directly via email at [email protected]

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Chapter 2 Installation
2.1 Appearance
Figure 2-1 Appearance
Caution
Installation of the PMC-53A should only be performed by qualified, competent personnel
that 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.
During the operation of the meter, hazardous voltages are present at the input terminals.
Failure to observe precautions can result in serious or even fatal injury and equipment
damage.

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2.2 Unit Dimensions
Figure 2-2 Unit Dimensions
2.3 Terminal Dimensions
Figure 2-3 Terminal Dimensions
Terminal
Terminal Dimensions
Wire Size
Max. Torque
1
Voltage Input
2.6mm x 3.2mm
1.5mm2
5 kgf.cm/M3
(4.3 lb-in)
Power Supply
2
Expansion Module A & B
RS485
DI
DO
3
Current Input
6.5mm x 6.5mm
1.0mm2- 2.5mm2
(14AWG - 22AWG)
6.0 kgf.cm/M3
(5.2 lb-in)
Table 2-1 Terminal Dimensions
2.4 Mounting
The PMC-53A 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
Fit the meter through a 92mmx92mm cutout as shown in Figure 2-4
Re-install the installation clips and push the clips tightly against the panel to secure the meter

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Figure 2-4 Panel Cutout Mounting
2.5 Wiring connections
PMC-53A 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:
3-Phase 4-Wire (3P4W) Wye Direct Connection with 3CTs
3-Phase 4-Wire (3P4W) Wye Direct Connection with 4CTs
3-Phase 4-Wire (3P4W) Wye with 3PTs and 3CTs
3-Phase 4-Wire (3P4W) Wye with 3PTs and 4CTs
3-Phase 3-Wire (3P3W) Direct Delta Connection With 3CTs
3-Phase 3-Wire (3P3W) Direct Delta Connection with 2CTs
3-Phase 3-Wire (3P3W) Delta with 2PTs and 3CTs
3-Phase 3-Wire (3P3W) Delta with 2PTs and 2CTs
1-Phase 3-Wire (1P3W) Direct Connection with 2CTs
1-Phase 2-Wire, Uln (1P2W-Uln) Direct Connection with 1CT
1-Phase 2-Wire, Ull (1P2W-Ull) Direct Connection with 1CT
Caution
Under no circumstances should the PT secondary be shorted.
Under no circumstances should the CT secondary be open when the CT primary is
energized. CT shorting blocks should be installed to allow for easy maintenance.

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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 Direct Connection with 4CTs
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 2-6 3P4W Direct Connection with 4CTs (Optional I41 & I42)
2.5.3 3-Phase 4-Wire (3P4W) Wye with 3PTs 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 3P4W.

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Figure 2-7 3P4W with 3PTs and 3CTs
2.5.4 3-Phase 4-Wire (3P4W) Wye with 3PTs and 4CTs
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 3P4W.
Figure 2-8 3P4W with 3PTs and 4CTs (Optional I41 & I42)
2.5.5 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.

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Figure 2-9 3P3W Direct Connection with 3CTs
2.5.6 3-Phase 3-Wire (3P3W) Direct Delta Connection with 2CTs
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 2-10 3P3W Direct Connection with 2CTs
2.5.7 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.

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Figure 2-11 3P3W Delta with 2PTs and 3CTs
2.5.8 3-Phase 3-Wire (3P3W) Delta with 2PTs and 2CTs
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 2-12 3P3W Delta with 2PTs and 2CTs
2.5.9 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.

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Figure 2-13 1P3W Direct Connection with 2CTs
2.5.10 1-Phase 2-Wire, Uln (1P2W-Uln) Direct Connection with 1CT
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 1P2W, L-N.
Figure 2-14 1P2W Uln Direct Connection with 1CT
2.5.11 1-Phase 2-Wire, Ull (1P2W-Ull) Direct Connection with 1CT
Please consult the Serial Number Label to ensure that the rated system line voltage is less than or equal
to the meter’s rated phase voltage input specification. Set the Wiring Mode to 1P2W, L-L.

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Figure 2-15 1P2W Ull Direct Connection with 1CT
2.6 Communications Wiring
The following figure illustrates the RS485 communications connections on the PMC-53A:
Figure 2-14 Communications Connections
The PMC-53A provides one standard RS485 port and one optional RS485. Up to 32 devices can be
connected on a RS485 bus. The overall length of the RS485 cable connecting all devices should not
exceed 1200m.
If the master station does not have a RS485 communications port, a RS232/RS485, USB/RS485 or
Ethernet/RS485 converter with optically isolated output and surge protection should be used.
2.7 Digital or Pulse Input Wiring
The following figure illustrates the Digital Input connections on the PMC-53A:
Figure 2-16 DI Connections
2.8 Digital (Relay) Output Wiring
The following figures illustrate the Digital (Relay) Output connections on the PMC-53A: