Pantograph disconnector GW54
Maximum reliability and minimal maintenance
The GW54 disconnectors are available up to 550 kV, 5000 A and 63 kA. The four solid pantograph arms have a large open/ close range to provide reliable on-position connection. The contacting area between fixed and moving contacts is designed to provide excellent electrical conductibility. The parallel connection lowers circuit resistance. Some other noteworthy features of the GW54 disconnector are:
- Minimized contact resistance
- All joints connected through rotating contacts having incomparable performance on reliability, sealing, conductivity and anti-corrosion
- Transmission parts insulated from conducting parts by nylon tubes
- Mechanism housed in an aluminum enclosure protecting against ice and pollution
- Interlocking for reliability under extreme conditions
- Ice breaking capacity
Applications
The appropriate use of GW54 pantograph disconnector is when busbars are arranged at two different levels. The GW54 pantograph disconnector is suitable for installation in substations with small installation area.
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) | 145 | 245 | 420 | 550 |
|---|---|---|---|---|
| Rated current (A) | up to 5000 | |||
| Short time withstand current (kA) | up to 63 | |||
| Power frequency withstand voltage | ||||
| · against earth | 275 | 460 | 560 | 620 |
| · across isolating distance | 315 | 530 | 750 | 800 |
| Lightning impulse withstand voltage | ||||
| · against earth | 650 | 1050 | 1425 | 1550 |
| · across isolating distance | 750 | 1200 | 1425 (+240) | 1550 (+315) |
| Switching impulse withstand voltage | ||||
| · against earth | - | - | 1050 | 1175 |
| · across isolating distance | - | - | 900 (+345) | 900 (+450) |
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