31 maja 2019 at 03:23 #66095
ZW8-12 outdoor high voltage vacuum circuit breaker
ZW8-12 series outdoor high voltage vacuum circuit breaker, with rated voltage 12kV and AC three-phase frequency of 50HZ, is mainly applied to close and break load current, overload current and short-circuit current in country power net, city power net and small- type power system. The breaker adopts the structure of three phases in one box. Three -phase arc-extinguishing chamber is inside the metal box. SMC material, which has the advantages of high insulating strength and reliable performance, is used to insulate phase-to- phase and phase-to-earth.
1Rated voltagekV 24
2Max working voltagekV 24
4Rated short-circuit opening currentkA20/2531.540
5Rated short-circuit closing currentkA50/6380100
6Rated peak withstand currentkA50/6380100
74s rated short-time withstand currentkA2031.540
LevelPower frequency withstand voltage
(before and after rated breaking)kV42(fracture 48)
Impulse withstand voltage
(before and after rated breaking)kV75(fracture 85)
9Rated operating sequence O-0.3 s-C&O-180s-C&O
10Mechanical life endurancetime10000
11Rated short-circuit opening current frequencytime50
12Rated closing voltage of operating mechanism(DC)V110,220
13Rated closing voltage of operating mechanism(DC)V110,220
14Open contact clearancemm11±1
15Super stroke(compressed length of contact springs)mm3.5 ± 0.5
16Time differential among phases for opening and closingms≤2
17Bounce time of closing contactsms≤2
18Average opening speedms0.9~1.2
19Average closing speedms0.5~0.8
20Opening timeUnder maximum operating voltagems15~50
Under minimum operating voltagems30~60
22Main loop resistance of each phaseμΩ≤50 (630A)≤45(1250A)≤35(1600-2000A)≤25(2500A以上)
23Allowed accumulative wearing thickness of static&Moving contactmm3
Why choose pingchao Electric
Here at Pingchao Electric Company,Promise customer satisfaction and guarantee first-class service. With over 5 years of business experience,we guarantee that our products are of the highest quality and reasonable price.
What are our services?
We manufacture 12kV, 24kV, 40.5kV switchgear fittings,Mainly earthing switches, interlocking devices, Vacumm circuit breaker,chassis trucks,copper contact,contact box ect.
How are the quality of our products guaranteed?
Each product produced by us will be 100% checked before delivery.If Any defective goods occurred,which will be returned free and be changed for new one.China Circuit Breaker factory
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