12KV 630A Gas Insulated Switchgear RMU Ring Main Unit
GB ISO 36KV Gas Insulated Switchgear Medium Voltage Ring Main Unit
Product Introduction
General
This RMU switchgear using SF6 as an arc extinguishing medium with double open contacts, 3 working-position and rotating contact which placed in an epoxy resin shell of a reinforced structure. Each gas box must pass helium leak detection before being filled with 0.045Mpa SF6 (Inspect any leakage to ensure can be installed vertically or horizontally). The classic installation is "horizontal", that is, install steel partitions between the cable compartment and the busbar compartment. That makes the interval between the busbar and the cable joint the most stringent safety requirements.
Standard
- ISO 780-1997,MOD
- IEC 62271-102:2002,MOD
- IEC 60265-1:1998,MOD
- IEC 60298:1990
- IEC 60529:1989
- IEC 507:1991
- IEC 60694:1996
- IEC 60420:1990
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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