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Series PM172
Powermeters
Installation and
Operation Manual
i
LIMITED WARRANTY
The manufacturer offers the customer a 24-month functional warranty on
the instrument in respect of faulty workmanship or parts from date of
dispatch from the distributor. In all cases, this warranty is valid for 36
months from the date of production. This warranty is on a return to factory
basis.
The manufacturer does not accept liability for any damage caused by
instrument malfunction. The manufacturer accepts no responsibility for
the suitability of the instrument to the application for which it was
purchased.
Failure to install, set up or operate the instrument according to the
instructions herein will void the warranty.
Only a duly authorized representative of the manufacturer may open your
instrument. 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.
NOTE
The greatest care has been taken to manufacture and calibrate your
instrument. However, these instructions do not cover all possible
contingencies that may arise during installation, operation or
maintenance, and all details and variations of this equipment are not
covered by these instructions.
For additional information regarding installation, operation or maintenance
of this instrument, contact the manufacturer or your local representative or
distributor.
IMPORTANT
Please read this instruction manual before installing the unit, and
take note of the following precautions:
1. Ensure that all incoming AC power and other power sources
are turned OFF before performing any work on the instrument.
Failure to do so may result in serious or even fatal injury and/or
equipment damage.
2. Before connecting the instrument to the power source,
check the labels on the side of the instrument to ensure that
your instrument is equipped with the appropriate power supply
voltage, input voltages, currents, analog output and
communication protocol for your application.
ii
3. Do not connect the instrument to a power source if it is
damaged.
4. Do not expose the instrument to rain or moisture.
5. The secondary of an external current transformer must
never be allowed to be an open circuit when the primary is
energized. An open circuit can cause high voltages, possibly
resulting in equipment damage, fire and even serious or fatal
injury. Ensure that the current transformer wiring is made
through shorting switches and is secured using an external strain
relief to reduce mechanical strain on the screw terminals, if
necessary.
6. Setup procedures must be performed only by qualified
personnel familiar with the instrument and its associated
electrical equipment.
7. DO NOT open the instrument under any circumstances.
Read this manual thoroughly before connecting the meter
to the current carrying circuits. During operation of the
meter, hazardous voltages are present on input terminals.
Failure to observe precautions can result in serious or
even fatal injury or damage to equipment.
Modbus is a trademark of Modicon, Inc.
BG0270 Rev.D
iii
Table of Contents
Quick Start ......................................................................v
Chapter 1 Introduction..................................................1
1.1 About this Manual ............................................................ 1
1.2 About the PM172 ............................................................. 1
Chapter 2 Installation....................................................7
2.1 Mechanical Installation..................................................... 7
2.2 Electrical Installation ......................................................10
2.2.1 Power Source Connection .......................................................10
2.2.2 Current Inputs ..........................................................................11
2.2.3 Ground.....................................................................................11
2.2.4 Voltage Inputs..........................................................................11
2.2.5 Relays......................................................................................15
2.2.6 Status Inputs............................................................................15
2.2.7 Analog Output..........................................................................16
Chapter 3 Using the Menus........................................17
Chapter 4 Setup Menus...............................................19
4.1 Basic Setup Menu ..........................................................19
4.2 Communications Port Setup Menus ..............................21
4.3 Digital Inputs Setup Menu..............................................23
4.4 Pulse Counters Setup Menu ..........................................24
4.5 Analog Output Setup Menu............................................25
4.6 Analog Expander Setup Menu .......................................28
4.7 Pulsing Output Setup Menu ........................................... 29
4.8 Alarm/Event Setpoints Setup Menu ............................... 30
4.9 Timers Setup Menu........................................................ 36
4.10 RTC Setup Menu ...........................................................37
4.11 Display Setup Menu ....................................................... 38
4.12 User Selectable Options Menu ......................................39
4.13 Relay Operation Control Menu....................................... 41
4.14 Access Control Menu .....................................................42
4.15 Reset Menu.................................................................... 43
Chapter 5 Data Display ...............................................45
5.1 Navigating in the Display Mode...................................... 45
5.2 Data Display Formats.....................................................47
5.3 Self-Test Diagnostics Display ........................................ 52
Chapter 6 Viewing Status Information.......................53
6.1 The Status Information Menu.........................................53
6.2 Status Display Formats ..................................................54
Chapter 7 Communications........................................56
iv
7.1 Connection Diagrams.....................................................56
7.1.1 COM1 Connections..................................................................56
7.1.2 COM2 Port Connections ..........................................................58
7.2 Using a Printer................................................................ 59
7.2.1 Configuring the COM1 Port for Printer .....................................59
7.2.2 Printout Format ........................................................................60
Appendix A Technical Specifications........................61
Appendix B Using Setpoints ......................................67
Appendix C Configuring TOU.....................................70
Appendix D Event and Data Logging ........................72
Appendix E Power Quality Setup...............................76
v
Quick Start
TYPICAL INSTALLATION
Wiring Mode 4LL3, RS-485 Connection
(See Sections 2.2.4 and 7.2 for complete set of diagrams)
ANALOG OUTPUT
23
RS-485
PC 1
+
-
METER
RS-485
UP TO 31
DEVICES
+
POWER- -
-TX
+TX
-RX +RX
9 678
9 6
V
54321
RS-422/485
N
51
11
RS-232
COM.1
3
V
8
V
2
5
2
V
1
12 +
STATUS INPUT -
1
1918 2120 22
2A
3(C)
N
LINE
LINE 2(B)
LINE 1(A)
RS-485
RS-485
00-06011
POWER-
METER
-
PC 2
- +
+
UP TO 31
DEVICES
LINE AC
N
+
-
10
N/-
1713 14 15 16
RS-422/RS-485
+TX-RX-TX
12
+RX
L/+
COM.2
5A
L
3
I
9
-
7
+
N
I
6
-
2
4
+
3
I
-
1
+12
-
21
RELAYS
+
2624 25 2827 29
OUTPUT
250VAC,5A
RELAY
Shorting
Switches
K
LOAD
KL
L
L
K
vi
SETUP
Setups can be performed directly on the front panel or via PAS communication
software - see Chapter 4 for full instructions.
Performing Basic and Communications Setup
Press
Press to activate middle window; press ▲▼ to scroll to option.
Press to activate lower window; press ▲▼ to scroll to value.
Press to save selected value.
Basic and Communications Setup: Default Options
Code Parameter Default Description
ConF Wiring mode 4Ln3 4-wire Wye using 3 PTs
Pt PT ratio 1.0 Phase potential transformer primary to
secondary ratio
Ct CT primary current 5A Primary rating of the phase current
transformer
d.P Power demand period 15 min Length of demand period for power
demand calculations, in minutes.
E = external synchronization
n.dp Number of power
demand periods 1
No. of demand periods to be averaged for
sliding window demands. 1 = block interval
A.dP Ampere/Volt demand
period 900 s
Length of demand period for volt/ampere
demand calculations, in seconds
0 = measuring peak current
buF Buffer size 8 Number of measurements for RMS
averaging
Freq Nominal frequency 50/60 Hz Nominal power utility frequency
LoAd Maximum demand load
current 0
Maximum demand load current used in
TDD calculations: 0 = CT primary current
rSt Reset enabled En Enabled (disable to protect all reset
functions)
Prot Communications
protocol ASCII ASCII protocol
rS Interface standard 485 RS-485 interface
Addr Address 1 Device address
bAud Baud rate 9600 bps Baud rate
dAtA Data format 8n Data format (8 bits, no parity)
H.Sh Flow control
(handshaking) nonE No flow control
Ctrl RTS control nonE RTS is not used
CPtb ASCII compatibility
mode diS Disabled
bASc
4L-n
ConF
Prt.1
ASCII
Prot
menu
option
value
menu
option
value
SELECT CH
G
ENTER
SELECT
SELECT
ENTER
Chapter 1 Introduction 1
Chapter 1 Introduction
1. Chapter 1 Introduction
1.1 About this Manual
This manual is intended for the user of the PM172 Powermeter. This
Powermeter is a microprocessor-based instrument used for the
measurement, monitoring, and management of electrical parameters.
This chapter gives an overview of this manual and an introduction to the
PM172.
Chapter 2, Installation, provides instructions for mechanical and electrical
installation.
Chapter 3, Using the Menus, presents the structure of menus for setup
and status viewing.
Chapter 4, Setup Menus, provides instructions for performing parameter
setup on the front panel.
Chapter 5, Data Display, guides you through the display pages.
Chapter 6, Viewing Status Information, tells you how to access additional
status information on the instrument. This information may be useful
during installation.
Chapter 7, Communications, provides drawings for communications
connections.
Appendix A contains the PM172 Technical Specifications.
Appendix B contains instructions on programming setpoints.
Appendix C provides information on configuring TOU registers.
Appendix D provides detail on Event and Data logging.
1.2 About the PM172
The PM172 is a compact three-phase AC Powermeter, specially designed
to meet the requirements of users ranging from electrical panel builders to
substation operators. The PM172 is available in two models: the PM172P
for basic power measurements, and the PM172E which adds energy
measurements and data recording. Both are suitable for 4-inch round and
92x92mm square cutouts.
The PM172 is an advanced microprocessor-based digital instrument that
incorporates the capabilities of a network analyzer, data recorder and
programmable controller. The instrument provides three-phase
measurements of electrical quantities in power distribution systems,
monitoring external events, operating external equipment via relay
contacts, fast and long-term on-board recording of measured quantities
and events.
2 Chapter 1 Introduction
Features
Local Display: The front panel features bright LED displays (three
windows, up to 49 pages, 6-digit energy counters) with adjustable update
time, a bar graph showing percent load with respect to user-definable
nominal load current, and two communications receive/transmit LEDs.
Display auto scroll is available on the main screen with a programmable
scroll interval of 2 to 15 seconds. Automatic return to the main screen is
available after 30 seconds of uninterrupted use.
The PM172E also features an energy pulsing LED.
AC Inputs: 3 voltage and 3 current galvanically isolated inputs for direct
connection to power line or via potential and current transformers.
Harmonic Measurements:
• Per phase voltage and current total harmonic distortion
• Per phase current total demand distortion
• Per phase K-Factor
Setup is menu driven, with optional password protection.
Two communication ports are available for RS-232/RS-485 and RS-
422/RS-485 standards, with ASCII, Modbus RTU and DNP3.0 protocols.
In ASCII and Modbus protocols, 120 assignable registers allow the user
to re-map any register address accessible in the instrument to the user
assignable register area. Changing setups and resetting accumulated
data through communications can be secured by the password.
Two relays are provided for energy pulsing (KYZ) or alarm and remote
control.
Two optically isolated status inputs are provided for status monitoring
with timestamp, for counting pulses and for external demand interval and
time synchronization.
Two optically isolated analog outputs with an internal power supply are
provided for remote monitoring or control. Current loop options are
0-20mA, 4-20mA, 0-1mA, ± 1mA.
Real Time Clock is provided for date and time stamp log and demand
interval synchronization. Standard or Daylight Savings Time (DST) with
automatic time adjustment is available. DST switch dates can be
configured for the use in different time zones.
The TOU (Time of Use) system:
• 7 configurable TOU energy registers for accumulating kWh
(import and export), kvarh (import and export), kVAh and energy from
two external meters through 2 pulsing inputs
• 3 configurable TOU Maximum Demand registers for recording
maximum kW (import and export), and kVA demands
• 16 tariffs
Chapter 1 Introduction 3
• 16 daily profiles (e.g., 4 seasons, 4 daily profiles per season)
• 8 daily tariff start times (tariff changes)
• 2-year calendar
• automatically configurable daily and monthly TOU profile log for
each allocated energy and maximum demand register using season
energy tariffs
A 0.5 Megabyte onboard non-volatile memory is provided in the PM172E
for data and event recording.
• Event recorder provides logging resets, device diagnostics and
setpoint operation events.
The event-driven Data recorder is provided for recording user-selectable
data in up to 8 data log files on a periodic basis or on any internal and
external trigger. It can be used for load profile and TOU energy profile
recording, or to log fault data on alarm conditions or digital input changes.
For more detailed information on event and data logging, see Appendix D.
User-selectable options are provided (see Section 4.11):
• Two power calculation modes
• Programmable energy rollover value (PM172E)
• Phase energy calculations option (PM172E)
4 Chapter 1 Introduction
PM172 Dimensions
Figure 1-1 PM172 Dimensions
SWITCHBOARD PANEL
(127.0)
5.000" MAX.
(127.0) MAX.
(20.0)
4.500"
5.000"
(127.0)
5.000"
(114.0)
(114.0)
4.500
0.787"
99-06020
Chapter 1 Introduction 5
Measured Parameters
NOTE: Real-time values are measured over 1 cycle of fundamental frequency; Average
values are of 8, 16 or 32 Real-time values. # = setup via panel, $ = setup via PC
Parameter Display Comm. Analo
g
Pulse Alarm
Average Values
Average RMS Voltage per phase 3 3 #$ #$
Average RMS Current per phase 3 3 #$ #$
Average Active Power per phase 3 3
Average Reactive Power per phase 3 3
Average Apparent Power per phase 3 3
Average Power Factor per phase 3 3
Average Total Active Power 3 3 #$ #$
Average Total Reactive Power 3 3 #$ #$
Average Total Apparent Power 3 3 #$ #$
Average Total Power Factor 3 3 #$ #$
Average Frequency 3 3 #$ #$
Average Neutral Current 3 3 #$ #$
Voltage & Current unbalance 3
Amps & Volt Demands
Ampere & Volt Demand per phase 3 #$
Maximum Ampere Demand per phase 3 3
Maximum Voltage Demand per phase 3 3
Power Demands
Active Power Accumulated Demand Imp & Exp 3 #$ #$
Reactive Power Accumulated Demand Imp & Exp 3 #$ #$
Apparent Power Accumulated Demand 3 #$ #$
Active Power Demand Import & Export 3 #$
Reactive Power Demand Import & Export 3 #$
Apparent Power Demand 3 #$
Active Power Sliding Demand Import & Export 3 #$
Reactive Power Sliding Demand Import & Export 3 #$
Apparent Power Sliding Demand 3 #$
Active Power Predicted Demand Import & Export 3 #$
Reactive Power Predicted Demand Imp & Exp 3 #$
Apparent Power Predicted Demand 3 #$
Maximum Active Power Demand Import 3 3
Maximum Active Power Demand Export 3
Maximum Reactive Power Demand Import 3
Maximum Reactive Power Demand Export 3
Maximum Apparent Power Demand 3 3
Energy per Phase
Active Energy Import per phase 3 3
Reactive Energy Import per phase 3 3
Apparent Energy per phase 3 3
Total Energy
Total Active Energy Import & Export 3 3 #$
Total Reactive Energy Import & Export 3 3 #$
Total Reactive Energy Net 3
E
E
E
6 Chapter 1 Introduction
Parameter Display Comm. Analo
g
Pulse Alarm
Total Apparent Energy 3 3 #$
TOU Registers
7 Energy registers 3 3
3 Maximum demand registers (selectable kW
import & export, kvar import & export, kVA
demands)
3
16 Tariffs for each TOU register 3
Total Harmonic Measurements
Voltage THD per phase 3 3 #$ #$
Current THD per phase 3 3 #$ #$
Current TDD per phase 3 3 #$ #$
K-factor per phase 3 #$ #$
Fundamental Values
Voltage and Current per phase 3
kW, PF per phase 3 3
kvar, KVA per phase 3
Total kW, PF 3 3
Total kvar, KVA 3
Real-time (RT) Values
RMS Voltage per phase 3 #$ #$
RMS Current per phase 3 #$ #$
Active Power per phase 3
Reactive Power per phase 3
Apparent Power per phase 3
Power Factor per phase 3
Total Active Power 3 #$
Total Reactive Power 3 #$
Total Apparent Power 3 #$
Total Power Factor 3 #$
Frequency
3 #$ #$
Neutral Current 3
Voltage & Current unbalance 3
Min/Max Logging
Min/Max A, V, total kW, kvar, kVA, PF 3 3
Min/Max Frequency, Neutral current 3 3
Phase Rotation 3 3 #$
Day and Time 3 3 #$
Pulse Counters 3 3 #$
Remote Relay Control 3
Inputs & Outputs Status
Digital Inputs Status 3 3 #$
Alarm Relay Status 3 3 #$
Alarm Trigger/Setpoint Status 3
Self-diagnostic Tests 3 3
- available in the PM172E
E
E
Chapter 2 Installation 7
Chapter 2 Installation
2. Chapter 2 Installation
2.1 Mechanical Installation
Figure 2-1 STEP 1 (4” round cut-out): Mount the Display Module on
cut-out
3.375"
HEX NUT #8-32
LOCK WASHER #8
FLAT WASHER #8 (WIDE)
DISPLAY
3.375"
0.198"
4.0"
SWITCHBOARD PANEL
STANDARD
4" ROUND
99-05013
Chapter 2 Installation
8
Figure 2-2 STEP 1 (92x92mm Square DIN cut-out): Mount the Display
Module on cut-out
Figure 2-3 STEP 2: Assemble the 4 Locating Studs
SWITCHBOARD PANEL
DIN43700
92x92mm
92.0mm
92.0mm
LOCK WASHER #8
FLAT WASHER #8 (WIDE)
HEX NUT #8-32
DISPLAY
99-05014
99-0501
5
SWITCHBOARD PANEL
LONG STUD
Chapter 2 Installation 9
99-05016
SLIDING DIRECTION
Figure 2-4 STEP 3: Slide and Position the Powermeter on Locating Studs
99-05017
THUMB NUT M4
LOCK WASHER M4
Figure
2-5 STEP 4: Affix the Powermeter Using the Thumb Nuts
Chapter 2 Installation
10
2.2 Electrical Installation
Before installation ensure that all incoming power sources
are shut OFF. Failure to observe this practice can result in
serious or even fatal injury and damage to equipment.
Connections to the PM172 are made via terminals located on the rear
panel of the instrument as shown in Figure 2-6.
2
RELAYS
NOM. VOLT. MEASUREMENT
N/-
L/+
POWER SUPPLY
COMM. PROTOCOL
Devices
RS-422/485
Static-Safe
Workstations
Handle Only at
11
V
9
N
5
RS-232
COM.1
13 161514 17
-RX
RS-422/RS-485
-TX
6
13
1
+TX +RX
16 171514
COM.2
STATUS INPUT ANALOG OUTPUT
POWER SUPPLY
10-16VDC
18-36VDC
36-72VDC
ATTENTION
SW. VER
S/N
Static-Sensitive
(24)
5
V
V
8
3
(48)
2
V
2
1
50/60Hz
85-290VDC
(12)
90-264VAC
CT.
5A
I
1A CT.
ASCII & DNP3.0
ANALOG OUTPUT
ASCII & MODBUS
S
INPUT
N
O
120V (OPT. U)
690V
STANDARD
10W
LOW DC
P
T
O
R
12
18 19 20
18 19 20
2523
1
+-
2221
-
2
+
24 26127 28
26 27 28
10
00-06007
12
6
I
-
93
+
7
-
2
I
+
4
-
3
1
I
+
1
29
29
Figure 2-6 Terminals - Rear View
2.2.1 Power Source Connection
The power source can be dedicated-fused, or from a monitored voltage if
it is within the instrument’s power supply range.
AC power supply: line to terminal 12; neutral to terminal 10.
DC power supply: positive to terminal 12; negative to terminal 10.
Chapter 2 Installation 11
2.2.2 Current Inputs
To ensure accurate readings, the input current should not exceed 2A
RMS and 2.93A amplitude for the 1A CT secondary, or 10A RMS and
14.6A amplitude for the 5A CT secondary.
Copper wiring 2.5 – 3.5 mm2 (12 AWG) should be used.
2.2.3 Ground
Connect the chassis ground of the PM172 to the switchgear earth ground
using dedicated wire greater than 2 mm2/14 AWG.
2.2.4 Voltage Inputs
Input of 690V (Standard): To ensure accurate readings, the measured
voltage between terminals 2-5, 5-8 and 8-2 should not exceed 790V AC
RMS, and the measured voltage between terminals 2-11, 5-11 and 8-11
should not exceed 460V AC RMS and 695V amplitude. Use any of the
seven wiring configurations shown in Figures 2-7 through 2-13.
Input of 120V (Option U): To ensure accurate readings, the measured
voltage between terminals 2-5, 5-8, 8-2, 2-11, 5-11 and 8-11 should not
exceed 144V AC RMS and 225V amplitude. 120V input usually implies
use of a potential transformer (PT). The PT requires use of any of the four
wiring configurations shown in Figures 2-9 through 2-12.
Wiring Configuration
(See parameter setup instructions in Section 4.2) Setup Code Figure
3-wire direct connection using 2 CTs (2-element) 3dir2 2-7
4-wire WYE direct connection using 3 CTs (3-element) 4Ln3 or 4LL3 2-8
4-wire WYE connection using 3 PTs, 3 CTs (3-element) 4Ln3 or 4LL3 2-9
3-wire open delta connection using 2 PTs, 2 CTs (2-
element) 3OP2 2-10
4-wire WYE connection using 2 PTs, 3 CTs (2½ -element) 3Ln3 or 3LL3 2-11
3-wire open delta connection using 2 PTs, 3 CTs (2½ -
element) 3OP3 2-12
4-wire delta direct connection using 3 CTs (3-element) 4Ln3 or 4LL3 2-13
Chapter 2 Installation
12
Figure 2-7 Three Wire Direct Connection Using 2 CTs (2-element)
Wiring Mode = 3dir2
c99-05030
LINE 1 (A)
(C)
N
(B)
K
+
-
+
-
+
K
L
LOAD
-
L
KL
LINE 2
LINE 3
N
V
3
V
V
2
V
1
Shorting
Switches
Voltages
1
7
10
12
+
9
4
6
+
+
3
-
-
-
Currents
Figure 2-8 Four Wire WYE Direct Connection Using 3 CTs (3-element)
Wiring Mode = 4LL3 or 4Ln3
/
