FKRN12-12D load break interrupter switch
FKRN12-12D load break interrupter switch
FKRN12-12D series pneumatic type load switch, fuse combination electric appliance can divide load current, overload current, the broken wire short circuit
current. This switch is applicable to 12 kv and below three phase power distribution system, as the transformer, cables, overhead line and power
equipment control and protection; Especially suitable for city network, site of the terminal substation and box transformer substation. And suitable
for ring network, double radiation power supply unit control and protection.
Three action principle and operating sequence
1. Manual operation: switching: operating handle into the operation chain parts of load switch spindle hole according to the panel tip rotation direction,
spindle drive the four connecting rod energy storage mechanism make closing spring is compressed, when the agency had dead center, tripping device
of gusset plate trip, in closing spring, under the action of switch quickly closing.
Break-brake: reverse direction rotary operating handle, spindle drive the energy storage mechanism rotation, the energy storage mechanism of self-
locking device was points brake lever to unlock, in points brake spring, under the action of switch quickly points brake.
Manual mechanism can also fit on electromagnetic shunt tripping device, points brake is just by turning on the power supply.
2. Electric operation: to electric mechanism and power, as long as a switch or points brake instruction, can automatically load switch and fuse
combination electric close, break-brake operations. In addition, electric mechanism side is equipped with shunt tripping device, need points brake, switch on the power, also can
finish points brake wipe European oh.
3. Grounding switch operation: jiang operating handle insert operation chain component of earthing switch on the spindle, according to the panel
tip rotation direction can, but the size of hard to be applied to ensure closing in place. Points gate instead.
This series of product has compact structure, reasonable design, reliable chain, insulation level high characteristic; Spring energy storage operation
mechanism make points, closing speed from operators operating force size influence; Arc in the bell insulated enclosure put out, arc of free gas will
not lead to alternate with or to reduce the strength of insulation. Bell insulating cover lower safety barrier, the closure from the charged part, kicked
the dog the ring network cabinet protection level, the copper tungsten alloy arc touch off and plum flower form the main contact, make the switch
to point is reliable, electric long life. This series of product maintenance easy, easy to operate, reliable operation.
Name Unit FN-12/630 FN5-12RD(L)/125 Rated voltage kV 12 12 Rated current A 630 125 Rated frequency Hz 50 50 Rated lightning impulse withstand voltage (peak) ground interphase kV 75 75 Isolated fracture 85 85 Frequency withstand voltage（1min) ground interphase kV 42 42 Isolated fracture 48 48 Rated short-Withstand current (Thermal stability) load break switch kA 20 earth swith 20 Rated short-circuit duration time(Thermal stability) load break switch S 4 load break switch 2 Rated short-circuit closing current (peak) kA 50 Rated breaking current Power load breaking current A 630 Close loop breaking current 630 5% power load breaking current 31.5 cable charge current 10 10 Breaking no-load transformer capacity kVA 1250 1250 Rated short-circuit making current (current limiting fuse) kA 31.5 Rated transfer current A 1200 Mechanical life times 2000 2000
This series of product design and manufacturing load the following standards:
GB3804 “3-63 kv AC high voltage load switch”
GB16926 “AC high voltage load switch fuse combination electric”
GB1985 “AC high voltage isolation switch and earthing switch”
IEC265 the rated voltage above 1 kv and below kv high-voltage switch”
IEC420 “AC high voltage load switch – fuse combination electric”
The normal use of the environment
1. The surrounding air temperature is not higher than + and ° c, no less than 25 ° c.
2. No more than 1000 m above sea level.
3. Relative humidity: daily mean no more than 95%, on average no more than 90%.
4. The surrounding air from corrosive or combustible gas and water vapor and obvious pollution.
5. No regular violent vibration.
- FKRN12-12D load switch (519)
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