GB ISO 12KV Gas Insulated Switchgear Medium Voltage Ring Main Unit
Product Introduction
General
The Fuse switch which named F-unit is a double-position load switch with an independent grounding switch, the tripping
device and the load switch farms the load switch-fuse combination.
The Grounding switch uses double mode, which can be grounded on both sides of the fuse at the same time, thus it ensures
that the fused fuse is not charged other the earthing switch is closed. Double grounding switch is interlocked mechanically, and primary ground operates grounding of two earthing switches of the same time.
The front cover of the fuse compartment is also mechanically interlocked with the earthing switch, and only when it is founded,
the fuse can be contacted.
Service environment
- Air temperature: -35℃~+40℃
- Humidity: Monthly average 95%; Daily average 90%.
- Altitude:≤ 1000m (Up to 5000 m can be custom)
- Ambient air not apparently polluted by corrosive and flammable gas, vapor, etc.
- No frequent violent shake
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 |
| 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
Optional components:
Electric operating-AC 220/110V; DC 24/48/110/220V
Auxiliary contact 5 NO 5 NC
Full set of fuse
FTU communication interface
Product Tags:
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Interlocked Fuse Protection Gas Insulated Switchgear RMU Images
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