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Horizontal double break disconnector GW56

Maximum reliability and minimal maintenance

The GW56 disconnectors are available up to 245 kV, 4000 A and 50 kA. These disconnectors have a low friction design and offer minimized contact resistance. They are equipped with interlocking for reliability in extreme conditions. Some other important features of these disconnectors are:

  • Contact plates with self-cleansing capability
  • Contact pressure kept unchanged by stainless springs
  • Superior design of mechanical interlock
  • Ice breaking capacity


The horizontal double break disconnector is suitable for substations with limited phase space and installations with low vertical clearance.

Why Hitachi Energy?

  • Worldwide experience
  • Maximum reliability and minimal maintenance
  • Energy efficient solution
  • Easy and quick erection
  • Reliable and smooth operation
  • Suitable for wide range of environmental conditions

Brief performance data

Rated voltage (kV) up to 245
Rated current (A) up to 4000
Short time withstand current (kA) up to 50
Power frequency withstand voltage (kV)
· against earth 460
· across isolating distance 530
Lightning impulse withstand voltage (kV)
· against earth 1050
· across isolating distance 1200
power plant engineer for substation

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