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Hybrid Switchgear PASS M0S - 420 kV

Compact switchgear assembled and high-voltage tested in factory, for rapid energizing in 24 hours

PASS M0S belongs to the innovative high-voltage hybrid switchgear family PASS (Plug and Switch System). PASS encloses all functions of a complete switchgear bay in a single module. The hybrid design makes use of traditional air-insulated busbars to connect with other equipment in the substation while enclosing the following bay functions in a single-phase gas-insulated housing:

  • Circuit breaker
  • Combined disconnector and earthing switches
  • Voltage transformers and Voltage sensors
  • Current Transformers
  • Motor drive option
  • Fast earthing switch option
  • Plug in cables option

PASS modules are completely factory assembled and tested, ready for rapid installation and energization. This goal is reached by a simple, safe and effective tool to perform the rotation of bushings from service to transportable position, due to a robust sealing interface capable of ensuring tightness during and after rotations.
PASS M0S is available in numerous configurations including single busbar, double busbar, double-circuit breaker, and various other customized configurations are possible.


  • Integration of renewables power to the grid
  • Remote mining connections
  • Mobile or skid mounted substations
  • Substation extensions or bay replacements

Why Hitachi Energy?

  • PASS is the most widely installed hybrid switchgear worldwide, protecting networks in many different climates and applications.
  • Close to GIS compactness at AIS value - the best of both worlds
  • Delivered fully assembled and tested, energizes in 24 hours on-site
  • Modular design enables highly customizable solutions in a short manufacturing time
  • Global service organization, local everywhere

Brief performance data

PASS M0S - 420 kV
Encapsulation   Single phase
Rated voltage kV 420
Frequency Hz 50/60
Rated current A 5000
Rated Breaking current kA 63
Rated power frequency withstand voltage kV 650
Lightning impulse withstand level - LIWL kV 1425
power plant engineer for substation

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