Measuring transducers
The module performs remote measurement functions and is designed to be used as part of systems for collecting and transmitting data from transformer substations, distribution sites, electrical stations, as well as in systems for commercial and technical electricity metering.
  • Specifications
  • Legend

Specifications

Feature Value
Telemetering channels

Number of current metering channels

4

Rated value of metered current (Ia, Ib, Ic), A

1; 5

Current metering range, A

0.01 ÷ 1.5Irat

Maximum value of metered current (Ia, Ib, Ic), A

7.5

Metering range of zero sequence current 3Io, A

0.01 ÷ 5

Maximum amperage 3Io, A

15

Power consumption of current circuits in nominal mode (for each phase), VA, max.

0.3

Number of voltage metering channels

3

Rated value of metered alternating voltage (phase/linear), V

57.7 / 100; 230 / 400

Phase voltage metering range, V

0.3 ÷ 1.2Urat

Power consumption of voltage circuits in nominal mode (for each phase), VA

0.1

Verification frequency, years

10
RS-485 interface

Ports

2

Baud rate, bit/s:

up to 115,200

RS-485 interface communication protocol

IEC 870-5-101, Modbus RTU
Power supply

Power supply voltage, V - LV version - HV version

15 ÷ 30 90 ÷ 264

Power consumption (at 24 V), max.

4 VA
Design

Case

IP 20 plastic

Mounting

DIN rail 35 mm

Overall dimensions (WxHxD): - LV version - HV version

22.5 x 99 x 114.5
45 x 99 x 114.5

Weight, kg, max

0.5
Reliability

Mean time between failures, h

140,000 hours

Average lifetime

30 years
Operating environment

Ambient air temperature, °С

-40 to +70

Relative humidity (non-condensing), %

5 ÷ 95 at 30 °C

Air pressure, kPa

60 ÷ 106.7

Legend

TOPAZ TM PM7 module modifications
TOPAZ TM PM7–A-[B1- to -Bx]-[C]-[D1- to -Dx]-[E1-to -Ex]-[F]-[G]-[K]-[L]-M-Pr
Position Code Description
Modification (set of functions)
A W Measurement of electric parameters. Electricity metering.
E Measurement of electric parameters. Electricity metering. Basic electricity quality indicators based on GOST 32144-2013. Oscilloscope record. Detection of short circuits and steady-state line-to-ground faults.
D Measurement of electric parameters. Electricity metering. Detection of short circuits, steady-state and alternating line-to-ground faults.
Q Measurement of electric parameters. Electricity metering. Power quality indicators (full list).
LW Measurement of electric parameters. Option to power the device using voltage measurement circuits.
Ethernet communication ports
В1 to Bx nGTx Ethernet 1000 Mbit/s TX RJ45
nGSFP Ethernet 1000 Mbit/s SFP
nGTXSFP Ethernet 1000 Mbit/s combo-port RJ45/SFP
nTx Ethernet 100 Mbit/s TX RJ45
nFxS Ethernet 100 Mbit/s FX LC single-mode
nFxM Ethernet 100 Mbit/s FX LC multi-mode
n – number of Ethernet ports of the respective type
RS-485 communication ports
C nR RS-485, where n is the number of ports
Discrete inputs/outputs
D1 to Dx nDI Discrete inputs, where n is the number of discrete inputs. Increment – 8.
nDOS Discrete outputs of the signal relay type, where n is the number of discrete outputs. Increment – 8.
nDOC Discrete outputs of the control relay type, where n is the number of discrete outputs. Increment – 3.
Design based on analog measurement circuits
E1 to Ex UI Fixed set of analog channels
nU AC voltage measurement channels
nUDC DC voltage measurement channels
nIMC AC measurement channels with a range of up to 50A
nIPC AC measurement channels with a range of up to 200A
nEMC AC measurement channels with remote sensors and extended range of up to 50A
nEPC AC measurement channels with remote sensors and range of up to 200A
nEPCО AC measurement channels with remote connector sensors and extended range of up to 200A
Design variants based on analog measurement circuits can be found in the table below
Information exchange protocols (in addition to basic protocols)
F IEC81 IEC 61850-8-1
G PRP PRP redundancy protocol support
Real-time clock
H RTC Non-volatile real-time clock
Additional options
I SSDm SSD drives, where m is the total ROM volume of SSD drives in gigabytes (terabytes)
SSDmT
J GNS Built-in GPS/GLONASS reciever
K GSM Built-in GSM modem
L PAN Design variant with a built-in indicator for integrating into a panel
Built-in power supply
M LV One power supply input Urat = 24V DC
2LV Two power supply inputs Urat = 24V DC
HV One power supply input 220V DC/AC
2HV Two power supply inputs 220V DC/AC

Module design variants based on analog measurement channels


Design version Set of measurement channels Supported modifications
Basic design variant with a fixed set of analog channels
UI 3 AC voltage measurement channels with a common neutral wire PM7-W,
PM7-E
3 channels of phase current measurement; built-in measurement current transformer
Current measurement channel for connecting an external core balance current transformer
Design variants with a custom set of analog channels
4U-4IMC 4 alternating voltage channels,
4 alternating current channels
PM7-D,
PM7-Q
4U-4IPC
4U-3IPC-1IMC
4U-4EMC
4U-4EPC
4U-3EPC-1EMC
4U-4EPCO
3U-1EMC 3 alternating voltage channels,
1 alternating current channel
PM7-LW
3U-1EPC