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Hybrid Switchgear PASS M0 - 145 to 170 kV

Compact switchgear is fully assembled and high-voltage tested in the factory

PASS M0 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 (Three-pole operated/Single-pole operated)

  • Combined disconnector and earthing switches

  • Voltage transformers and voltage sensors

  • Current transformers

  • Optional:
    - Fast earthing switch
    - Plug-in cables

PASS M0 modules are completely factory-assembled and tested, ready for rapid installation and energization. PASS M0 comes in standard configurations such as single busbar, double busbar and double circuit breaker. Customized modules are also available.


  • Transmission substations, including reactor and capacitor switching

  • Substation extensions or bay replacements

  • Stand-alone, mobile or skid-mounted substations

  • Industrial, renewable and mining grid connections

Why Hitachi Energy?

  • PASS is the most widely installed hybrid switchgear worldwide, connecting and protecting networks in many different climates and applications

  • Close to GIS compactness at AIS values - the best of both technologies

  • Delivered fully assembled and tested, allowing energization within 16 hours for a single bus bar configuration 

  • Modular design enables both standard and highly customizable solutions 

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

Brief performance data

PASS M0 (145 - 170 kV)
Encapsulation Single phase
Rated voltage kV 145* 170
Frequency Hz 50/60 50
Rated current A 3150
Rated Breaking current kA 40 40
Rated power frequency withstand voltage kV 275 375
Lightning impulse withstand level – LIWL kV 650 750

* Product is also available with rated voltage 72.5 kV

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