Siemens SIPROTEC 6MU85 bay controller Numerical relay

Product Description

SIPROTEC 6MU85

The new SIPROTEC 6MU85 merging unit bases on the flexibleSIPROTEC 5 system has been designed for conventional and non-conventionalinstrument transformers (LPITs) and digitalizes all primary data close to theprocess. SIPROTEC 5 process bus provides versatile solutions and migrationconcepts for new and existing systems.

Features

Main functions:

• Merging unit
• Bay unit for distributes busbur protection SIPROTEC 7SS85
• Breaker functions
• Backup protection functions
• Additional functions

Communication:

• Up to 4 sampled measured value streams according IEC 61850-9-2 LE or IEC 61869 flexible streams

Hardware flexibility:

• Flexibly adjustable and expandable I/O quantity structure within the scope of the modular SIPROTEC 5 system; 1/6 expansion modules can be added.

Housing width:

• 1/3 × 19 inches to 2/1 × 19 inches

As standard:

• Conformal coating

Functions

Merging unit

• Per ETH-BD-2FO Ethernet module 1 or 2 (in preparation) Sampled Measured Value (SMV) streams 
• - up to 32 analog values in any combination of CTs and VTs
  or
  - 4x CTs, 4x VTs (IEC 61850-9-2 LE)
• Up to 4 ETH-BD-2FO modules possible
• Reliable and redundant data transmission via PRP protocol
• IEC 61869-9, IEC 61869-13 compliant
• IEC 61850-8-1 GOOSE, MMS and merging unit protocol on the same Ethernet module
• Sample and date/time synchronization via IEEE 1588v2/PTP
• Redundant power supply
• Extended temperature range (-40 ºC to 70 ºC)

Merging unit functionality is also available for all modularSIPROTEC 5 protection devices.

Breaker functions

• Control with switchgear interlocking
• Circuit-breaker failure protection (50BF)
• Circuit-breaker wear monitoring
• Switching statistics
• Point on wave switching (PoW)
• Trip-circuit supervision (74TC)
• Automatic reclosing (79)
• Synchrocheck (25)

Backup protection functions

• Non-directional overcurrent protection (50/51, 50N/51N)
• Directional overcurrent protection (67/67N)
• Overvoltage and undervoltage protection (27/59) 

Additional functions

• Phasor measurement unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
• Arc protection
• Auxiliary functions for simple tests and commissioning
• Temperature measurement via thermobox TR1200 (7XV5662-6AD10 or 7XV5662-8AD10)
• 4-20 mA transducer inputs for various analog process values, e.g pressure, tap-changer position

Communication

• Pluggable communication modules, usable for different and redundant protocols (IEC 61850-8-1, IEC 61850-9-2, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, PROFINET IO)
• Serial protection data communication via optical fibers, two-wire connections and communication networks (IEEE C37.94, and others), including automatic switchover between ring and chain topology
• Extensive cyber security functionality, such as role-based access control (RBAC), protocolling security-related events or signed firmware
• Simple, quick and secure access to device data via a standard Web browser – without additional software