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
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 |
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