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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