- Main purpose
FZW20A-12 type outdoor high-voltage boundary switch (hereinafter called breaker for short )is a three-phase 50HZ outdoor power distribution equipment with rated voltage of 12KV.Mainly used for breaking and closing of load current,overload current and short-circuit current,zero sequence current in electric power system,it is applied for protection and control of power distribution system in substation and industrial and mining enterpreise,especially for rural power network and places requiring frequent operation.This product is equipped with controller,for its control mechod:(1)FDR-01 palm computer,(2)FDR-02(GSM type),with single-phase earthing and short circuit protection functions,which meets the requirement of power distribution automatization,and can finish the owrk of traditional recolser reliably and effectively.
This installation and operation instruction contains contents of main technical parameter of circuit breaker,product structure,principle and method of installation,operation and maintenance,etc.
Normal working environment
1.Ambient Air Terperature:-40 ℃～+40℃; daily temperature difference:25 ℃
4.The place where it is used is free from fire,explosion,chemical corrosion and intense vibration.
1.Technic Parameter(Table 1)
Item Unit Parameter Rated voltage KV 12 Rated frequency HZ 50 Rated current A 630、1000 Rated short circuit breaking current KA 12.5、16、20、25 Rated peak value withstand current KA 31.5、40、50、63 Rated chort time withstan current(4S)(Peak value) KA 12.5、16、20、25 Rated short current switching current(Peak value) KA 31.5、40、50、63 Mechanism life Times 10000 Breaking current frequency under rated short circuit Times 10000 Breaking current frequency under rated short circuit Times 30 Power frequency withstand voltage(1min)interphase,to earth/fracture KV 42/49 Lightning impulse withstand voltage(peak valu)interphase,to earth/fracture KV 75/85 1 min power frequency withstand voltage of secondary circuit KV 2
2. Mechanical Character Parameter
ITEM UNIT PARAMETER contact opening MM 8.5~10 contact overtravel MM 2.5~4 switch off speed M/S 1.2±0.2 switch on speed M/S 0.6±0.2 contact closing bounce time S ≤2 interphase center distance MM INNER：135±1.5，OUTER：275±2 external charged air insulation distance MM 240±2 external creepage ratio MM/KV 38 three-phase switching on-synchroneity MS ≤2 loop resistance цΩ < 120 switch-on time MS ≤45 switch-off time MS ≤45 rated power of energy storage motor W ≯40 rated voltage of energy storage motor V AC220 rated switching-on operating voltage V AC220 max./min.switching-on operating voltage V AC246/143 rated switching-off operating voltage V AC220 max./min.switching-off operating voltage V AC246/143 max./min.motor voltage V AC242/176
3、The configuration of VT & CT
The operating power supply of this product adopts the low voltage power supply with AC220V(110)offered by user or directly adopts the secondary voltage with AC220V(110) which is output bu aerial line through voltage transformer(outer).It also could be built-in current transformer for self-over-current protection and the standard configuration is two sets.
The circult breaker composes of main body box with high-voltage system and operating components inside, operating mechanism box and hanger frame offering installation,fixation and moving(lifting),please see drawing 1for outline structure and installing size and drawing 2for inner structure.
1)The vacuum arc-extinguishing circuit breaker has reliable breaking performance, it owns damp-proof and explosion safelysmall volume light weight and long service life.
2)The circult breaker adopts totally enclosed structure, with good sealing performance,it owns damp-proof and condensation resistant performance,so that is suitable for area with high remperature and high moisture.
3) Three-phase CT could be installed in the circult breaker,and the output three-phase current is offered to the intelligent controller for information analysis ,the transformation ratio of CT could be adjusted by connecting the terminal to corresponding terminal pedestal.
4)the switching on or off of circuit breaker could be operated manually or electrically with over-current prorection.
5)the operating mechanism is novol simple reliable and small,its mechanical life can reach 10000 times.
6)the whole operating mechanism composes of switching on spring energy storage system,over-current tripper,switching on/off coil manual on/off system ,auxiliary switch and energy storage indeication part,etc.
7)the circlt breaker could be either suspended on crossbeam by hanger or installed with sitting posture.
Dimension and mounting
- [book id=’27’ /]
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