Teleprotection for high-voltage lines

Teleprotection for high-voltage lines – SWT 3000

SWT 3000

The SWT 3000 teleprotection system is the proven worldwide solution for identifying and isolating faults extremely quickly in the high-voltage grid.

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Teleprotection for high-voltage lines SWT 3000

Features & functions


The SWT 3000 teleprotection system is the highly developed solution world wide for identifying and isolating faults extremely quickly in the high-voltage grid. Combined with existing distance  protection relays, it allows operators to reduce downtime to an  absolute minimum. The high voltage grid network protection disconnects the faulty part of the system as quick as possible in a selective way.


High demands are placed on network protection systems in terms of reliability and availability.


SWT 3000 for teleprotection signaling in communication networks offers the required maximum security and reliability together with shortest command transmission time.


The SWT 3000 protection signaling system utilizes the command transmission for  distance protection devices according to the IEC 60834-1 standard. Several types of teleprotection command schemes like permissive, intertripping (direct or transfer) as well as blocking protection schemes are applicable. In particular requirements for security, dependability and transmission time are essential for operation.


Dependability is defined as the probability for missed commands and security is defined as the probability for unwanted commands.


The transmission time of the teleprotection system is the time elapsed between the change at the command input and the corresponding change in state at the command output, excluding propagation time.

Functions / Features

  • Bidirectional and independent transmission of commands
  • Up to 16 commands with digital line interfaces
  • Up to 4 commands with analog line interfaces or PLC
  • Command Interface for normal contact load (IFC-P, fast)
    - 4 inputs and 4 relay outputs (max. 4 modules)
  • Command Interface module for high contact load (IFC-D)
    - 4 inputs and 4 relay outputs (max. 4 modules)
  • Interface module for binary command signaling (IFC-S)
    - 8 relay outputs (max. 2 modules)
  • Command interface module IEC 61850 electr. Or optical
  • Line Interface modules
    - 2x X.21, 2x G703.1, 2xG703.6 (DLE)
    - 2x fiber, short range SM (FOS1), short range MM (FOS2), long range (FOL1) or C37.94 (FOS3)
    - 1x Analog 2or 4 wire (CLE)
    - 1x Ethernet electrical or optical (TPoP)
  • Interface module for alarm signaling (ALR)
    - 3 relay outputs, 1 input for time synchronization
  • Configuration via element manager application (USB and ETH interface)
  • Command Input configuration
    - voltage range (DC 24-250 V)
    - pulse suppression
    - input command limitation and extension
  • Command output configuration
    - output or signaling allocation
    - input command limitation and extension
  • Power supply
    - 2 wide range supplies (DC, AC/DC)
    - redundant assembly
  • Event recorder and command counter
  • Path protection via 2 different line interfaces in any combination
  • Network management SNMP interface


  • Keeps downtimes to an absolute minimum
  • Supports IEC 61850 interfaces as well as conventional binary interfaces and the conversion in both directions.
    - Binary Mode
    - GOOSE Mode
    - Mixed Mode
    - Interchange Mode
  • Performance according to IEC 60834-1
  • Flexible integration into various customer communication networks
  • Integration into PLC system – PowerLink

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