Detailed Product Description

General
ZN63S-12(VSI⁺)indoor high voltage AC vacuum circuit breaker is a kind of indoor high voltage switchgear of 3-phase AC,50 HZ,with rated voltage of 7.2-12kv,It is used as protection and control element in electric wire netting equipment,power equipment of industrial and mineral enterprises.

The breaker conforms to the national standards of GB1984-89"AC High Voltage Circuit Breaker",JB3855-96"3.6~40.5kv indoor high voltage AC vacuum circuit breaker",DL403-91 "Technical conditions for ordering 10-35kv indoor high voltage vacuum circuit breaker"and as well as the relative IEC standards.

ZN63S-12(VSI⁺)indoor high voltage AC vacuum circuit breaker can operate frequently with ability of multi-breaking and quick on-switching.It has reliable interlocking function.

ZN63S-12(VSI⁺) indoor high voltage AC vacuum circuit breaker adopts the design of integrating the operating mechanism with the breaker,available for serving as permanently installed unit,or as hand-trolley unit after equipped with underframe.

Technical Data

 

1.Main technical parameters of breaker

No.	Item	Unit	Value
1	Rated voltage	KV	12
2	Rated frequency	HZ	50
3	Rated lighting imppulse withstand voltage(peak value)	KV	75
4	Rated instantaneous power frequency withstand voltage(1 min)	KV	42
5	Rated short circuit breaking current	KA	20	25	31.5	40
6	Rated current	A	630 1250	63 1250	1250 1600 2000 2500	1250 1600 2000 2500 3150 4000
7	Rated instantaneous withstand current(effective value)KA		20	25	31.5	40
8	Rated peak value withstand current(peak value)KA		50	63	80	100
9	Rated short circuit making current(peak value)KA		50	63	80	100
10	Rated short circuit current lasting time	s	4
11	Mechanical life	Times	30000			10000
12	Secondary circuit power frequendcy withstand voltage(1 min)	V	2000
13	Rated operating sequency		O-t-CO-t1-CO

Note:20KA,25KA,31.5KA t=0.3s,t=180s 40KA t=180s t1=180s
Rated current 4000A and required mandatory cool wind

2.Mechanical features parameters of breaker

No.	Item	Unit	Value
1	Clearance between contact-head	mm	9±1
2	Contact-head travel	mm	3±0.5
3	Bouncing time of closing contacts	ms	≤2(40KA≤3)
4	Different time of switch-on/off of 3 phases	ms	≤2
5	Average switch-off speed	m/s	1.1±0.2
6	Average switch-on speed	ms	0.6±0.2
7	switch-off time(rated voltage)	ms	≤50
8	switch-on time(rated voltage)	ms	≤100
9	Rated switch-on/off operating voltage	V	AC110/220 DC110/220
10	Rated voltage of charging motor	V	AC110/220 DC110/220
11	Rated frequency of charging motor	W	70(40KA 100W)
12	Energy storage time	s	<10
13	Accumulated permitted wearing thickness of moving & static contact	mm	3
14	Resistance of main conductive circuit	630A 1250A 1600-2000A 2500-3150A 4000A	≤50μΩ ≤45μΩ ≤35μΩ ≤25μΩ ≤20μΩ
15	Contact pressure of switch-on contact	20KA-25KA 31.5KA 40KA	2000N-2500N 3000N-3500N 4500N-5000N