Introduction to SF6 Gas Insulated Load Break Switch
The FLN36-12 SF6 load break switch is a double fracture rotary switch that uses sulfur hexafluoride gas as the insulating and arc quenching medium, suitable for 10KV distribution system XGN15-12 RMU. Each load break switch is filled with SF6 gas in pressure of 0.4bar and the gas is permanently sealed.
| No. | Item | Unit | Value | |||
| FLN36 | FLRN36 | |||||
| 1 | Rated voltage | KV | 12 | |||
| 2 | Rated frequency | Hz | 50 | |||
| 3 | Rated current | A | 630 | 125 | ||
| 4 | Rated insulation level | 1 min power frequency withstand voltage | phase-to-phase, phase to earth | KV | 42 | |
| fracture | 48 | |||||
| Lightning impulse withstand voltage (peak) | phase-to-phase, phase to earth | 75 | ||||
| fracture | 85 | |||||
| 5 | Auxiliary circuit 1min power frequency withstand voltage | V | 2000 | |||
| 6 | Rated short-time withstand current / duration | main switch | KA | 20/3 | ||
| earthing switch | 20/2 | |||||
| 7 | Peak withstand current and short-circuit breaking current | KA | 50 | 125 | ||
| 8 | Rated closed circuit breaking current | A | 630 | |||
| 9 | Rated active load breaking current | A | 630 | |||
| 10 | Rated cable charging breaking current | A | 10 | |||
| 11 | Rated breaking no-load transformer capacity | KVA | 1250 | |||
| 12 | Breaking transfer current | A | — | 1700 | ||
| 13 | Expected short-circuit breaking current | KA | — | 50 | ||
| 14 | Mechanical life | times | 2000 | |||
| 15 | SF6 gas rated inflation pressure (20 ℃gauge pressure) | MPa | 0.04 | |||
| 16 | SF6 gas highest pressure (20 ℃gauge pressure) |
MPa | 0.045 | |||
| 17 | Dimensions (width × height × depth) |
mm | 345 × 420× 730 | |||
| No. | Rated Voltage (KV) | Fuse Rated Current (A) | Fuse Link Rated Current (A) | Rated Breaking Current (KA) |
| 1 | 12 |
40 | 6.3, 10, 16, 20, 25, 31.5, 40 | 40 |
| 2 | 100 | 50, 63, 80, 100 | 40 | |
| 3 | 125 | 125 | 50 |
Main switch function: manual and electrical opening and closing operations are both allowed. The closing is only allowed when the earthing switch is in open state.
Earthing switch function: the opening and closing operation can only be done manually. When the main switch is in closed state, the earthing switch is not available.
Auxiliary switch:
Closing position: 2 normally open -2 normally closed;
Opening position: 2 normally open -2 normally closed;
Grounding position: 2 normally open -2 normally closed.
Mechanism indication:
Main switch and earthing switch status indication (K-type operating mechanism)
Main switch and earthing switch status indication, blown fuse indication (A-type operating mechanism)
Shunt trip coil is for A type operating mechanism.
2. Electric operation: automatic opening and closing can be achieved through motor drive and control unit. The motor operating voltage can be AC220V, DC220V, DC48V, DC24V.
Outline of SF6 Gas Insulated Load Break Switch
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