KNKONG 12KV RMU SF6 Gas Insulated Switchgear GB ISO IEC
KNKONG 12KV RMU SF6 Gas Insulated Switchgear GB ISO IEC
Product Introduction
General
SF6 ring main unit is an air-insulated or gas-insulated medium-voltage electrical combination equipment that can be combined into multiple circuits at will, with switching, communication, and protection of the power system, with load switches as the core component. Its main circuit core component is composed of an SF6 load switch or additional circuit breaker and other primary auxiliary electrical appliances.
SF6 ring network cabinets can be divided into expandable and non-expandable types according to the combination method, and can be divided into co-box type (also known as gas-filled cabinet or SF6 fully insulated cabinet) according to different manufacturing processes
Technical Data
| No. | Item | Unit | Parameter | |||
| 1 | Rated voltage | kV | 12 | 24 | 36 | |
| 2 | Rated frequency | Hz | 50/60 | |||
| 3 | Rated current | A | 630(1250*) | |||
| 4 |
1min Power frequency withstand voltage |
wet | kV | 38 | 50 | 70 |
| dry | kV | 48 | 60 | 85 | ||
| 5 | Lightning impulse withstand voltage | kV | 75 | 125/150 | 170 | |
| 6 | Rated short circuit breaking current (peak) | kA | 80 | 63 | 63 | |
| 7 | Rated active load and close circuit breaking current | A | 63 | 50 | 50 | |
| 8 | Rated transferring current | A | 1700 | 1200 | 1200 | |
| 9 | Rated short circuit making a current (peak) | kA | 80 | 63 | 63 | |
| 10 | Rated cable(line) charging breaking current | A |
50 and 10 50/10 |
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| 11 | Cable charge breaking current in earthing fault | A | 20 | 20 | 20 | |
| 12 | Rated withstand current (peak) | kA | 80 | 63 | 63 | |
| 13 | Short-time withstand current (2s) | kA | 25 | 20 | 20 | |
| 14 | Mechanism life | times | 5000 | 2000 | 2000 | |
Note: For short circuit breaking and the peak current is based on Fuse plus combination
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