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.
|4||Rated insulation level||1 min power frequency withstand voltage||phase-to-phase, phase to earth||KV||42|
|Lightning impulse withstand voltage (peak)||phase-to-phase, phase to earth||75|
|5||Auxiliary circuit 1min power frequency withstand voltage||V||2000|
|6||Rated short-time withstand current / duration||main switch||KA||20/3|
|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|
|15||SF6 gas rated inflation pressure (20 ℃gauge pressure)||MPa||0.04|
|16|| SF6 gas highest pressure (20 ℃gauge pressure)
|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)|
||40||6.3, 10, 16, 20, 25, 31.5, 40||40|
|2||100||50, 63, 80, 100||40|
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.
Closing position: 2 normally open -2 normally closed;
Opening position: 2 normally open -2 normally closed;
Grounding position: 2 normally open -2 normally closed.
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