Circuit-breaker management device

Circuit-breaker management device – SIPROTEC 7VK87


The SIPROTEC 7VK87 circuit breaker management device has specifically been designed for circuit-breaker management. With its modular structure, flexibility and the powerful DIGSI 5 engineering tool, the SIPROTEC 7VK87 device offers future-oriented system solutions with high investment security and low operating costs.

Features & functions

Circuit-breaker management device SIPROTEC 7VK87


Main function:

  • Automatic reclosing function, synchrocheck, circuit-breaker failure protection


  • 1-pole and 3-pole or 3-pole

Inputs and outputs:

12 predefined standard variants with 

  • 4/4 or 8/8 current transformers / voltage transformers,
  • 5 to 31 binary inputs, 
  • 8 to 46 binary outputs

Hardware flexibility:

  • Flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular system

Width of housing:

  • 1/3 × 19 inches to 2/1 × 19 inches

As standard:


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

  • Automatic reclosing function and synchrocheck for line protection applications with 1-pole and 3-pole tripping
  • Circuit-breaker failure protection for 1-pole and 3-pole tripping
  • Point-on- wave switching
  • Control, synchrocheck and switchgear interlocking protection
  • Voltage controller for transformers
  • Arc protection
  • Voltage protection
  • Graphical logic editor to create powerful automation functions in the device
  • Single-line representation in small or large display
  • Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
  • Up to 4 optional 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 (SDH networks, MPLS electrical power systems, for example using IEEE C37.94, and others), including automatic switchover between ring and chain topology.
  • Reliable data transmission via PRP and HSR redundancy protocols
  • 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
  • Phasor measurement unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
  • Time synchronization using IEEE 1588
  • Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
  • Auxiliary functions for simple tests and commissioning
  • Flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular system


  • Automatic reclosing after 1/3-pole tripping
  • Synchrocheck before reclosing
  • Circuit-Breaker Failure Protection
  • Also used in switchgear with breaker-and-a-half layout
  • Backup overcurrent and voltage protection
  • Protection data communication over different distances and physical media, such as optical fiber, two-wire connections, and communication networks
  • Phasor Measurement Unit (PMU)


  • Safe and reliable automation and control of your systems
  • Purposeful and easy handling of devices and software thanks to a user-friendly design
  • Cyber security in accordance with NERC CIP and BDEW Whitepaper requirements
  • Highest availability even under extreme environmental conditions  by “conformal coating“ of electronic boards
  • Powerful communication components warrant safe and effective solutions
  • High investment security and low operating costs due to future-oriented system solutions


News & Media

Get the latest information.

You’ll find interesting news and information that’s always being updated.