Bay controller SIPROTEC 6MD85

Bay controller SIPROTEC 6MD85

Product Overview

Modular bay controller for medium voltage and high to extra-high voltage switchgear with integrated operation and extensive protection functions. Powerful automation, simple configuration with DIGSI 5

Main function: Inputs and outputs

Inputs and outputs:

  • 5 predefined standard variants with 4 current transformers,
    4 voltage transformers,
    11 to 75 binary inputs,
    9 to 41 binary Outputs

Hardware flexibility:

  • Flexibly adjustable and expandable I/O quantity structure within the scope of the SIPROTEC 5 modular system. For great requirements placed on the quantity structure, the device can be extended in the second row. For example, this permits an additional 240 binary inputs (and more) to be used with the IO230 (see chapter “Hardware”)

Housing width:

  • 1/3 × 19″ to 2/1 × 19″

As standard:

Benefits :

  • Safe and reliable automation and control of your systems
  • Purposeful and easy handling of devices and software thanks to a user-friendly design
  • Cybersecurity in accordance with NERC CIP and BDEW Whitepaper requirements
  • Highest availability even under extreme environmental conditions  by “conformal coating“ of printed circuit board assembly

Functions :

DIGSI 5 permits all functions to be configured and combined as required.

  • Integrated bay controller with versatile protection function from medium to extra-high voltage
  • Control of switching devices
  • Synchrocheck and switchgear interlocking protection
  • Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
  • Up to 4 pluggable communication modules, usable for different and redundant protocols (IEC 61850-8-1, IEC 61850-9-2 Client, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, PROFINET IO, PROFINET IO S2 redundancy)
  • Virtuelle Netzwerkaufteilung (IEEE 802.1Q – VLAN)
  • Redundancy protocols PRP and HSR
  • Arc protection
  • Extensive cybersecurity functionality, such as role-based access control (RBAC), protocolling security-related events, signed firmware or authenticated network access IEEE 802.1X
  • Simple, quick and secure access to the device data via a standard Web browser to display all information and diagnostic data, as well as vector diagrams, single-line and device display pages
  • Graphical logic editor to create powerful automation functions in the device
  • Optional overcurrent protection for all voltage levels with 3- pole tripping
  • Also used in switchgear with breaker-and-a-half configuration
  • Overcurrent protection also configurable as emergency function
  • Selective protection of overhead lines and cables with single-ended and multi-ended feeders using protection communication
  • Secure serial protection data communication, also over great distances and all available physical media (fiber-optic cable, 2-wire connections and communication Networks)
  • PQ-Basic: voltage unbalance; voltage changes: overvoltage, dip, interruption; TDD, THD and Harmonics
  • Capturing operational measured variables and protection function measured values to evaluate the plant state, to support commissioning, and to analyze faults
  • Phasor Measurment Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol integrated
  • Powerful fault recording (buffer for a max. record time of 80 s at 8 kHz or 320 s at 2 kHz)
  • Point-on-Wave Switching (PoW)
  • Auxiliary functions for simple tests and commissioning
  • Flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular system

More Information


+66 2 063 5262-3, +66 83 440 1404