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12kv high voltage /medium voltage indoor vacuum circuit breaker

Basic Info

Model No.: ZN63A-12

Product Description

ZN63A-12 12kv high voltage indoor Vacuum Circuit Breaker  




NO.   Item Unit data
1 Rated voltage KV 12
2 Highest working voltage KV 12
3 Rated lighting implus withstand voltage(peak) KV 75
4 Rated frequency HZ 50
5 Rated current A 630  1250 630 1250   1600 2000    2500  3150 1250  1600 2000  2500 3150  4000
6 Rated short-circuit breaking current(Rated thermal stability current - RMS) KA 20/25 31.5 40
7 Rated short-circuit making current(peak) KA 50/63 80 100
8 Rated Peak withstand current(Rated dynamic current - peak) KA 50/63 80 100
9 Rated short-time withstand current(4s) KA 20/25 31.5 40
10 Overtravel mm 3.5±1.05
11 Dominant loop resistance    To the ground 75(Breaker fracture85)
12 Rated thermal stability time s 4
13 Rated operation ranking   O-0.3SNO-180S-NO,O-180S-NO-180S-NO(50KA_
14 Rated short circuit breaking current breaking times times 50(40ka 30,50ka 20)
15 Rated single/back-to-back capacitor bank breaking current A 40KA(630/400)    50KA(800/400)
16 Mechnical life times 20000
17 Operating mechanism rated closing voltage(DC) v DC110/220 AC110/220
18 Operating mechanism rated opening voltage(DC) v DC110/220 AC110/220
19 Rated contact stroke mm 11±1
20 overtravel(Contact spring compression length) mm 3.5±0.5
21 three pole closing opening bouncing operation ms ≤2
22 Contact bouncing duration at closing contact ms ≤2
23 Average opening speed m/s 0.9~1.2
24 Average closing speed m/s 0.5~0.8
25 opening time under the highest operation voltage s ≤0.05
26 under the lowest operation voltage ≤0.08
27 closing time   s 0.1
28  Dominant loop resistance μΩ ≤60(630A)≤50(1250A)≤35(1600-2000A)≤25(above 2500A)
29 contact ersion limit mm 3









Our service: 

1.You inquuiry related to our products or prices will be replied in 24hours 
2.Well-trained and experienced staffs to answer all your enquires in fluent english 
3.OEM & ODM, any your costomized lighings we can help you to design and put into product 
4.Distributoershio are offered for your unoque design and some our current models 
5.Protection of you sales area ,ideas of design and all your private information


Buy recommendation :

1. Our all items are 100% authentic ,please provide details of the address before purchase , So we can calculate the shipping discounts and the best transportation. 
2. According to the customer's requirement ,different specifications of the items can be mixed shipments and lower freight. 
3.Only wholesale, if require samples, please contact us,If you have any questions or suggestions. Please Contact us freely.


12KV circuit breaker

Contact us if you need more details on 12kv Circuit Breaker. We are ready to answer your questions on packaging, logistics, certification or any Other aspects about 12kv Vacuum Circuit Breaker、Medium Voltage Circuit Breaker. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Vacuum Circuit Breaker

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