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GW4-252 Series Outdoor High Voltage Disconnector
GW4-252kV series outdoor high voltage disconnect switch is an outdoor high voltage electrical equipment for 50Hz three-phase alternating current.
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Product Description
GW4-252kV series outdoor high voltage disconnect switch is an outdoor high voltage electrical equipment for 50Hz three-phase alternating current. Designed for use in three-phase electrical systems of outdoor installation of alternating current 50 Hz at power plants, substations, as well as at large industrial and mining enterprises for switching high-voltage lines without load, as well as for electrical isolation and switching on/off circuits of repaired high-voltage busbars, switches and other electrical equipment from energized high-voltage lines. This product features rational design, advanced technology, safety and reliability, easy and flexible operation, excellent performance and long service life.
The electrical and mechanical characteristics of the product comply with the requirements of the national standard GB1985 "High-voltage disconnectors and earthing disconnectors for alternating current."
| Name | Unit change | Meaning |
| Rated voltage | kV | 252 |
| Rated current | A | 630, 1250, 1600, 2000, 2500, 3150, 4000 |
| Rated short-time current (thermal resistance) | kA (3 s) | 25 / 31.5 / 40 |
| Rated peak current of electrodynamic resistance (dynamic resistance) | kA | 63 / 80 / 100 |
| Power frequency test voltage (1 min) | relative to ground / between phases | 460 |
| open contact | 520(+) | |
| Lightning impulse test voltage | relative to ground / between phases | 1050 |
| open contact | 1200(+) | |
| Mechanical wear resistance | cycles | 10,000 |
| Electrical durability | cycles | 2,000 |
| Switching current transfersbytire | supported | |
| Capacitive switching small current | supported | |
| Anti-pollution class | Class III/IV |
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