GN24-12 MV Disconnector Switch 12KV 630A
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GN24-12 MV Disconnector Switch 12KV 630A
The GN24-12 model indoor medium voltage disconnector switch is suitable for power systems with a rated voltage of 12KV and AC 50Hz. It is used to connect and disconnect circuits under no-load conditions. This series of disconnect switches also includes pollution abatement type, high altitude type, and electrified display type.
This series of disconnect switches is a three-pole type, consisting of a chassis, a shaft, a lever, a porcelain pillar insulator, a knife, and a terminal board. The shaft is mounted on the base frame, with three pairs of levers welded onto the shaft. The lever is made of a porcelain insulator and a knife. The shaft protrudes from the base frame and can be connected to any operating mechanism.
Working Environment:
- Altitude: 1000m to 3000m
- Ambient temperature: -30°C to 40°C
- Relative humidity of air: monthly average <90%, daily average ≤95%
- Wind pressure: <700 Pa (wind speed 34 m/s)
- Seismic intensity: 8 degrees
- Environmental degree: degree III
It cannot be used in conditions with fire and explosion hazards, heavy pollution, chemical corrosion, strong vibrations, etc.
| Description | Unit | Parameter | ||||||||
| Rated Voltage | KV | 12 | ||||||||
| 1 min power frequency withstand voltage | To ground | KV | 42 | |||||||
| Eracture | KV | 48 | ||||||||
| Lightning impulse withstand voltage (peak) | To ground | KV | 75 | |||||||
| Eracture | KV | 85 | ||||||||
| Rated frequency | Hz | 50 | ||||||||
| Rated current | A | 400 | 630 | 1000 1250 | ||||||
| Rated short-time withstand current | KA | 16 | 20 | 16 | 20 | 25 | 20 | 25 | 31.5 | |
| Rated peak withstand current | KA | 40 | 50 | 40 | 50 | 63 | 50 | 63 | 80 | |
| Rated short-time withstand current duration main knife /ground knife | s | 4/2 | ||||||||
| Creepage distance | mm | 300~380 | ||||||||
| Mechanical life | Times | 2000 | ||||||||



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