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Hybrid Switchgear PASS M0S - 420 kV

Compact switchgear assembled and high-voltage tested in factory

PASS M0S belongs to Hitachi Energy’s 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

  • Optional:
    - Fast earthing switch
    - Cable terminations

PASS modules are completely factory assembled and tested, ready for rapid installation and energization. This is achieved by providing a simple, safe and effective tool to rotate bushings from service to transport position. A robust sealing interface ensures tightness during and after rotations.


  • 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

  • Delivered fully assembled and tested, allowing energization within 24 hours for a single busbar configuration

  • Modular design enables highly customizable solutions in a short manufacturing time

  • Global service organization to support the equipment in operation through its entire lifetime

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

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