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Horizontal center break disconnector GW55

Maximum reliability and minimal maintenance

The GW55 disconnectors are available upto 245 kV, 3150 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

Applications

The horizontal center break disconnector is used at substations due to its simplicity and flexibility in arrangement.

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
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Brief performance data

Rated voltage (kV) 72.5 123 145 245
Rated current (A) up to 3150
Short time withstand current (kA) up to 50
Power frequency withstand voltage (kV)        
· against earth 140 230 275 460
· across isolating distance 160 265 315 530
Lightning impulse withstand voltage (kV)        
· against earth 325 550 650 1050
· across isolating distance 375 630 750 1200
power plant engineer for substation

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