Digital Substation
TOPAZ units of the MU series are part of the Stand-Alone Merging Unit (SAMU) class and designed as interfaces to lower-level objects. Depending on its modification, the unit performs analog measurements of currents and voltages and transmits data to a higher level using the IEC 61850-9-2 protocol, as well as remote signaling and control data and commands via the IEC 61850 protocol (GOOSE, MMS).
  • Specifications

Specifications

Feature Value
Telemetry channels
Number of current measurement channels up to 16, depending on modification
Number of voltage measurement channels up to 16, depending on modification
Measuring range of current channels, A: - measuring transformers - protective transformers 0.01 ÷ 50 0.05 ÷ 200
Range of measurement of voltage channels, V 5.75 ÷ 440
Alternating current frequency ranges of measurements, Hz from 42.5 to 57.5
The limits of permissible basic relative error of voltage measurement, % ±0.1
The limits of permissible basic relative error of AC amperage measurement, % ± 0.1 (at I <10 A) ± 0.5 (at I ≥ 10 A)
The limits of permissible basic relative error of AC frequency measurement, Hz ±0.01
Verification period, years 10
Remote signalling channels
Number of channels up to 32, depending on modification
Discrete input channel input voltage, V 5 ÷ 220
Maximum input voltage, V 350
Input impedance, kOhm 0.5 ÷ 220
Rated value of input currents, mA 1 ÷ 10
Remote control channels
Number of channels up to 16, depending on modification
Ethernet interfaces
Ports up to 16, depending on modification
Baud rate, Mbit/s: up to 1000
Design options RJ-45, LC (single-/multi-mode), SFP
Data exchange protocols IEC 60870-5-104, IEC 61850-9-2, IEC 61850-8-1
Network redundancy protocols PRP
Clock synchronization protocol PTP, PPS
RS-485 interface
Ports up to 8
Baud rate, bit/s: up to 115,200
RS-485 interface communication protocol IEC 870-5-101, Modbus RTU
Power supply
Supply voltage, V: - LV version - HV version 12 ÷ 58
90 ÷ 264
Design
Case IP 20 plastic
Mounting DIN rail 35 mm
Overall dimensions (WxHxD) depending on modification
Weight, kg, max. 1
Reliability
Mean time between failures, h 140,000 hours
Average lifetime 30 years
Operating environment:
– Ambient air temperature, °С -40 to +70
Average humidity (non-condensing), % 5 ÷ 95 at 30 °C
Air pressure, kPa 60 ÷ 106,7