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Horizontal double break disconnector eDB

Maximum reliability and minimal maintenance

The eDB disconnectors are available up to 420 kV, 3150 A and 50 kA. These disconnectors have a low friction design and offer minimized contact resistance. They are equipped with dead center interlocking for reliability in extreme conditions. Some other important features of these disconnectors are:

  • No external spring in contact fingers
  • Low friction design
  • Superior design of mechanical interlock
  • Strong rotary pedestals
  • Ice breaking capacity

Applications

The horizontal double break disconnector is suitable for substations with limited phase space and installation 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) 72.5 145 245 420
Rated current (A) up to 3150 (*)
Short time withstand current (kA) up to 50
Power frequency withstand voltage
· against earth 140 275 460 520
· across isolating distance 160 315 530 610
Lightning impulse withstand voltage
· against earth 325 650 1050 1425
· across isolating distance 375 750 1200 1425 (+240)
Switching impulse withstand voltage
· against earth - - - 1050
· across isolating distance - - - 900 (+345)

(*) Higher current on request

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