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Withdrawable Switchgear Module COMPASS 110 - 170 kV

Compact air-insulated switchgear fully assembled and tested in factory, for rapid energizing in 24 hours

A COMPASS Module includes all the high voltage functions of a switchgear bay in just one module. It is suited both for indoor and outdoor installations.
The transport of the module can be conducted with ordinary vehicles, it arrives pre-fabricated and pre-tested on site ready to energize in 24 hours, thus allowing a faster commissioning time of the whole substation. A COMPASS module requires up to 50% less space compared with a conventional air-insulated switchgear bay.

Each Compass can include:

  • Circuit-breaker
  • Disconnectors with their own motor/manual drive
  • Earthing switches with their own motor/manual drive
  • Current transformers
  • Voltage transformers
  • Surge arresters
  • Spring or digital motor drive
  • Conventional or digital control cabinet


  • Integration of renewable power to the grid
  • Railway substations
  • Substation extensions or bay replacements
  • Digital substations

Why Hitachi Energy?

  • Long experience and large installed base with COMPASS, 2000 bays installed since 1996
  • COMPASS can be serviced and inspected easily by lowering a section of the module which includes circuit breaker, current transformer and the mobile contact of the disconnector. The necessary operations are carried out on a ground level so safety and efficiency are ensured. 
  • Global service organization, local everywhere

Brief performance data

Circuit breaker drive Spring Drive
Rated voltage kV 110 - 123 132 - 145 150 - 170
Frequency Hz 50 / 60 50 / 60 50 / 60
Rated current * A 2000 2000 2000
Rated Breaking current kA 40 40 40
Lightning impulse withstand level - LIWL ** kV 230 275 325

* for temp below +40 °C
** higer values on request

power plant engineer for substation

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