CET PMC-53 Series User manual

PMC-53 Series
Intelligent Multifunction Meter
User Manual
Version: V5.2A
02/07/2012
Ceiec Electric Technology

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This manual may not be reproduced in whole or in part by any means without the express
written permission from Ceiec Electric Technology (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
Ceiec Electric Technology (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 ............................................................................................................................7
1.1 Overview ....................................................................................................................................7
1.2 Features......................................................................................................................................7
1.3 PMC-53 series’ application in Power and Energy Management Systems...................................9
1.4 Getting more information ........................................................................................................10
Chapter 2 Installation ............................................................................................................................11
2.1 Appearance ..............................................................................................................................11
2.2 Unit Dimensions .......................................................................................................................12
2.3 Mounting..................................................................................................................................12
2.4 Wiring connections ..................................................................................................................13
2.4.1 3-phase 4-wire Wye Direct Connection ........................................................................13
2.4.2 3-phase 4-wire Wye with 3PTs and 3CTs.......................................................................14
2.4.3 3-phase 3-wire Open Delta Direct Connection .............................................................14
2.4.4 3-phase 3-wire Open Delta with 2PTs and 3CTs............................................................15
2.4.5 3-phase 3-wire Open Delta with 2PTs and 2CTs............................................................15
2.5 Communications Wiring...........................................................................................................16
2.6 Digital Input Wiring ..................................................................................................................16
2.7 Digital Output Wiring ...............................................................................................................16
2.8 Pulse Output Wiring.................................................................................................................17
2.9 I residual Input Wiring..............................................................................................................17
2.10 Temperature Input Wiring......................................................................................................17
2.11 Power Supply Wiring..............................................................................................................17
Chapter 3 Front Panel ............................................................................................................................18
3.1 LCD Display...............................................................................................................................18
3.1.1 LCD Testing....................................................................................................................18
3.1.2 LCD Display Areas..........................................................................................................18
3.1.3 Peak Demand Display....................................................................................................20
3.2 LED Indicators...........................................................................................................................20
3.3 Display Screen Types ................................................................................................................20
3.3.1 Default Screen...............................................................................................................21
3.3.2 Data Display ..................................................................................................................21
3.4 Setup Configuration via the Front Panel ..................................................................................22
3.4.1 Functions of buttons .....................................................................................................22
3.4.2 Reset the Alarm LED and Buzzer ...................................................................................23
3.4.3 Setup Menu ..................................................................................................................24
3.4.4 Configuration ................................................................................................................25
Chapter 4 Applications ..........................................................................................................................30
4.1 Inputs and Outputs...................................................................................................................30
4.1.1 Digital Inputs .................................................................................................................30
4.1.2 Digital Outputs ..............................................................................................................30
4.1.3 Energy Pulse Outputs....................................................................................................31
4.1.4 I residual Input ..............................................................................................................31

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4.1.5 Temperature Input........................................................................................................32
4.2 Power and Energy ....................................................................................................................32
4.2.1 Voltage and Current Phase Angles ................................................................................32
4.2.2 Energy ...........................................................................................................................32
4.2.3 Demands .......................................................................................................................33
4.3 Setpoints ..................................................................................................................................33
4.3.1 Control Setpoints ..........................................................................................................33
4.3.2 Digital Input Setpoints...................................................................................................34
4.3.3 I residual Setpoints........................................................................................................35
4.3.4 Temperature Setpoint ...................................................................................................36
4.4 SOE ...........................................................................................................................................36
4.5 Power Quality...........................................................................................................................37
4.5.1 Harmonics .....................................................................................................................37
4.5.2 Unbalance .....................................................................................................................37
Chapter 5 Modbus Register Map...........................................................................................................38
5.1 Basic Measurements ................................................................................................................38
5.2 Energy Measurements .............................................................................................................40
5.3 Peak Demands..........................................................................................................................41
5.4 Harmonic Measurements.........................................................................................................41
5.5 Setup Parameters .....................................................................................................................42
5.6 SOE Log.....................................................................................................................................44
5.7 Time .........................................................................................................................................46
5.8 DO Control................................................................................................................................47
5.9 Meter Information....................................................................................................................47
Revision History .....................................................................................................................................49
Appendix A Technical Specifications .....................................................................................................50
Appendix B Residual Current Sensor (Zero Sequence CT) ....................................................................52
Appendix C Temperature Sensor ...........................................................................................................54
Appendix D Standards Compliance ....................................................................................................... 55
Appendix E Ordering Guide ...................................................................................................................56
Contact us ..............................................................................................................................................56

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Chapter 1 Introduction
This manual explains how to use the PMC-53 Series Intelligent Multifunction Meter. Throughout the
manual the term “meter” generally refers to all models. Differences between the models are
indicated with the appropriate model number.
This chapter provides an overview of the PMC-53 series meter and summarizes many of its key
features.
1.1 Overview
The PMC-53 Series Intelligent Multifunction Meter is CET’s latest offer for the low-cost digital
power/energy metering market. Housed in an industry standard DIN form factor measuring
96mmx96mmx75mm, it is perfectly suited for industrial, commercial and utility metering applications.
The PMC-53 features quality construction, multifunction measurements and a large, backlit, easy to
read LCD display. Compliance with the IEC 62053-22 Class 0.5S kWh Accuracy Standard, it is a cost
effective replacement for analog instrumentation, capable of displaying 3-phase measurements at
once. It optionally provides two Digital Inputs for status monitoring and two Digital Outputs for
control, alarm or energy pulsing applications. Further, it has optional inputs for I residual as well as
RTD temperature measurements for fire alarm monitoring, transformer temperature monitoring or
other applications. The standard SOE Log records all setup changes, DI/Setpoint status changes and
DO operations in 1ms resolution. With the standard RS485 port and Modbus protocol support, the
PMC-53 becomes a vital component of an intelligent, multifunction monitoring solution for any Power
and Energy Management systems.
You can setup the meter through its front panel or via our free PMC Setup software. The meter is
also supported by our PecStar® Integrated Energy Management System.
The PMC-53 is available in three models: PMC-53V, PMC-53I and PMC-53M. Following is a list of
typical applications for the PMC-53:
Analog meter replacement
Low and medium voltage applications
Industrial and commercial panel metering
Substation, factory and building automation
Sub-metering, cost allocation
Residual Current and Temperature monitoring
Contact CET Technical Support should you require further assistance with your application.
1.2 Features
Enhanced Measurements (Firmware Version V1.20.01 or later)
Neutral Current, Displacement PF
Voltage and Current Unbalance, THD and K-Factor
kW Total, kvar Total, kVA Total and Current Demands/Peak Demands
Voltage and Current Phase Angles

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Ease of use
Large, backlit, easy to read, 5-line LCD display with wide viewing angle
Password-protected setup via front panel or free PMC Setup software
Easy installation with mounting clips, no tools required
Built in alarm buzzer for optional I residual and Temperature alarms
Setpoints
6 user programmable setpoints
Configurable thresholds, time delays and DO triggers
SOE Log
32 events time-stamped to ±1ms resolution
Setup changes, Setpoint and DI status changes and DO operations
Communications
Optically isolated RS485 port
Selectable baud rate from 1200 bps to 19,200 bps
Modbus RTU protocol
System Integration
Supported by our PecStar® Integrated Energy Management System
Easy integration into other Automation or SCADA systems
Optional features
I residual Input (Residual Current)
Requires an optional, external Zero Sequence CT (1A nominal)
Two levels of alarm –ALARM and TRIP. Each alarm level:
Can be enabled individually
Programmable threshold and time delay
Logs an SOE event, sounds the alarm buzzer AND triggers a dedicated DO when activated
RTD Temperature Input
Requires an optional, external RTD temperature probe
Programmable threshold and time delay
Logs an SOE event, sounds the alarm buzzer AND triggers a dedicated DO when activated
Digital Inputs and Outputs
Digital Inputs –2 volts free dry contact, 24VDC internally wetted
Digital Outputs –2 Form A DO (mechanical) or Solid State (SS) relays
2 DO relays
DO1 is for I residual or Temperature ALARM output if present AND enabled
DO2 is for I residual TRIP output if present AND enabled
2 SS relays for kWh and kvarh pulsing

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Models and Measurements
Measurements
Models
Standard
PMC-53V
PMC-53I
PMC-53M
VLN and VLL per phase and Avg
■
■
Current per phase and Avg
■
■
Neutral Current*
■
Voltage and Current phase angles*
■
Frequency
■
■
kW, kvar, kVA per phase and Total
■
PF per phase and Total
■
Displacement PF per phase*
■
kWh, kvarh Import and Export
■
kVAh Total
■
Demands and Peak Demands*
■
Voltage and Current Unbalance*
■
Voltage and Current THD*
■
K-Factor*
■
RS485 / Modbus Protocol
■
■
■
LED Pulse Outputs
■
Optional Features
I residual Input
1
RTD Temperature Input
1
DI
2
2
2
DO or SS Relay
2
2
2
* Available in Firmware Version V1.20.01 or later
1.3 PMC-53 series’application in Power and Energy Management Systems
The PMC-53 can be used to monitor Wye or Delta connected power system. Modbus
communications allow real-time data, events, DI status and other information to be transmitted across
a RS485 network to an Integrated Energy Management system such as PecStar®.

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1.4 Getting more information
Additional information is available from CET via the following sources:
Visit www.ceiec-electric.com
Contact your local representative
Contact CET directly via email or telephone

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Chapter 2 Installation
2.1 Appearance
Figure 2-1 Appearance
Caution
Installation of the PMC-53 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 Dimensions
2.3 Mounting
The PMC-53 series meter 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 2-3
Re-install the installation clips and push the clips tightly against the panel to secure the meter
Figure 2-3 Panel Cutout

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2.4 Wiring connections
PMC-53 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 Wye Direct Connection
3-phase 4-wire Wye with 3PTs and 3CTs
3-phase 3-wire open Delta Direct Connection
3-phase 3-wire open Delta with 2PTs and 3CTs.
3-phase 3-wire open Delta with 2PTs and 2CTs
2.4.1 3-phase 4-wire Wye Direct Connection
Please consult the serial number label to ensure that the system phase voltage is less than or equal to
the meter’s voltage input specification.
Set the Wiring Mode to Wye.
Figure 2-4 4-Wire Wye, Direct Connection
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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2.4.2 3-phase 4-wire 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 voltage input specification.
Set the Wiring Mode to Wye.
Figure 2-5 4-Wire Wye, 3PTs, 3CTs
2.4.3 3-phase 3-wire Open Delta Direct Connection
Please consult the serial number label to ensure that the rated PT secondary voltage is less than or
equal to the meter’s voltage input specification.
Set the Wiring Mode to Delta.
Figure 2-6 3-Wire DELTA, Direct Connection

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2.4.4 3-phase 3-wire Open 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 voltage input specification.
Set the Wiring Mode to Delta.
Figure 2-7 3-Wire DELTA, 2PTs, 3CTs
2.4.5 3-phase 3-wire Open 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 voltage input specification.
Set the Wiring Mode to Delta.
Figure 2-8 3-Wire DELTA, 2PTs, 2CTs

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2.5 Communications Wiring
The following figure illustrates the RS485 communications connections on the PMC-53:
Figure 2-9 Communications Connections
The PMC-53 provides one RS485 port and supports the Modbus RTU protocol. 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 or USB/RS485
converter with optically isolated output and surge protection should be used.
2.6 Digital Input Wiring
The following figure illustrates the Digital Input connections on the PMC-53:
Figure 2-10 DI Connections
2.7 Digital Output Wiring
The following figure illustrates the Digital Output connections on the PMC-53:
Figure 2-11 DO Connections

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2.8 Pulse Output Wiring
The following figure illustrates the Pulse Output connections on the PMC-53:
Figure 2-12 Pulse Output Connections
2.9 I residual Input Wiring
The following figure illustrates the I residual connections on the PMC-53:
Figure 2-13 I residual Connections
2.10 Temperature Input Wiring
The following figure illustrates the Temperature Input connections on the PMC-53:
Figure 2-14 Temperature Input Connections
2.11 Power Supply Wiring
For AC supply, connect the live wire to the L/+ terminal and the neutral wire to the N/- terminal. For
DC supply, connect the positive wire to the L/+ terminal and the negative wire to the
N/- terminal. Connect the GND terminal to ground.
Figure 2-15 Power Supply Connections

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Chapter 3 Front Panel
The PMC-53 series meter 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
3.1 LCD Display
3.1.1 LCD Testing
Pressing both the <Phase> and the <Energy> buttons simultaneously for 2 seconds enters the LCD
Testing mode. During testing, all LCD segments are illuminated for 1 second and then turned off for
1 second. This cycle will repeat 3 times to allow for the detection of faulty segments. The Alarm
Buzzer will also sound during the test cycle if so equipped. The LCD will return to its normal display
mode afterwards.
Figure 3-2 Full LCD Display
3.1.2 LCD Display Areas
This section provides a description of the LCD display areas. The PMC-53M LCD display can generally
be divided into 5 areas:
A: Displays special symbols for parameters such as I4, THD, Unbalance, Displacement PF,
Voltage Phase Angle, Current Phase Angle and Demand
B: Displays energy information such as kWh Import, kWh Export, kvarh Import, kvarh Export,
and kVAh. The Residual Current and Temperature measurements are also displayed here if
the PMC-53M is equipped with these optional inputs

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C: Displays the indicators for DI status, DO status, Harmonic Distortion (HD), Unbalance (unb),
PF Quadrant and Alarm status
D: Displays Measurement values
E: Displays Measurement Units
Figure 3-3 LCD Display
The following table shows the special LCD display symbols:
Area
Segments
Symbol Description
A
Phase Voltage
Line Voltage
I4
Voltage/Current Unbalance
Demand
Displacement PF
Va/Vb/Vc THD
Ia/Ib/Ic THD
K-Factor
Va/Vb/Vc Angle
Ia/Ib/Ic Angle
B
kVAh Indicator
kWh/kvarh Export Indicator
C
DI Open
DI Close
DO Open
DO Close
Harmonic
Distortion
Unbalance
PF Quadrant
Alarm Symbol
Table 3-1 Special LCD Display Symbols

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3.1.3 Peak Demand Display
The following special arrangements have been made for the display of the Peak Demand value and its
timestamp with the appropriate units displayed in the Measurement Units area.
a: Peak Demand Indicator - Ia, Ib, Ic, kW Import, kvar Import, kVA Total
b: Peak Demand value
c: Date portion of the Peak Demand timestamp
d: Time portion of the Peak Demand timestamp
Figure 3-4 Peak Demand Display
Area
Symbol Description
a
Ia Peak Demand Indicator
Ib Peak Demand Indicator
Ic Peak Demand Indicator
kW Peak Demand Indicator
Kvar Peak Demand Indicator
kVA Peak Demand Indicator
b
Peak Demand Value
c
Peak Demand Timestamp (Date Portion) - YY.MM.DD
d
Peak Demand Timestamp (Time Portion) - HH.MM.SS
Table 3-2 Peak Demand Display
3.2 LED Indicators
The PMC-53M comes standard with two LED indicators on its front panel, labeled kWh and kvarh.
The kWh indicator is green; and the kvarh indictor is red. The two LED indicators are used for kWh
and kvarh pulsing if the EN PULSE is ENABLED (see Section 4.1.3 for Energy Pulsing). For PMC-53M
equipped with the optional I residual and/or Temperature inputs and if EN PULSE is NOT ENABLED, the
kWh indicator shows the meter’s running state by blinking once per second, and the kvarh indicator
shows that there are active I residual or Temperature alarms if lit (see Sections 4.3.3 and 4.3.4 for I
residual and Temperature Setpoints).
3.3 Display Screen Types
The front panel provides two display modes: Data Display and Setup Configuration. There are four
buttons on the front panel: <System>, <Phase>, <Energy> and <Setup>. The <Setup> button is only
used when configuring the meter. The <System>, <Phase> and <Energy> buttons are used to view
data on the front panel.