ZN63 (VS1-12) indoor AC high-voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is an indoor switch gear with three-phase AC 50Hz and rated voltage of 12kV. It can be supplied to industrial and mining enterprises, power plants and substations as electrical facilities. For control and protection, and for places with frequent operations.

The circuit breaker meets the relevant requirements of the IEC5687 publication.
The circuit breaker adopts the integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or a special propulsion mechanism to form a handcart unit.

No. Parameters unit VALUE
1 Rated voltage KV 12
2 Rated insolation, Withstand 75
Power frequency withstand 42
3 Rated short-circuit breaking Current A 20 25 31.5 40
4 Rated current A 630 630 1250 1250 1600
1250 1600 2000 2000 2500
2500 3150 3150 4000
5 Rated thermal stability current (valid valu) A 20 25 31.5 40
6 Rated dynamic stable current (peak) A 63 63 80 100
7 Rated short-circuit making current (peak value) A 50 63 80 100
8 Rated short-circuit breaking current breaking times Time 80 80 50 30
9 Secondary circuit power frequency withstand voltage V /m 2000
10 Nominal Operation Sequence C 0.3s; O/C:180s; O/C-180s; O/C:180s; O/C (40KA)
11 Rated thermal stabilization time S 4
12 Rated single/back-to-back capacitor bank breaking current A 630/400 800/400
13 Mechanical life 20000 10000

The parameters of the opening and closing coils

Parameters Opening coil Closing coil Notes
Rated operating current AC110/220;              DC110/220 AC110/220;              DC110/220 No closing for close wire to close when its voltage is less than 30% Ue.
Coil power(W) 245 245
Normal working voltage 85%-110% Ue 65%~120% Ue

Circuit breaker assembly adjusted mechanical characteristics, Table 3.

No. Characteristics Unit Value
1 Contact Spacing mm 11±1
2 contact stroke mm 3.311±0.6
3 Average closing speed (6mm~contact closing) m/s 0.611±0.2
4 Average opening speed (contact separation ~6mm) m/s 1.111±0.2
5 Opening time (rated voltage) m/s 20-50
6 Allowable cumulative thickness of wear and tear of moving and static contacts m/s 35-70
7 Contact closing bounce time ms 2 3(40kA)
8 Three-phase opening is not periodic ≤2
9 Closing time (rated voltage) mm 3
10 Main conductive loop resistance µΩ 50(630A);45(1250A)
25(2500A and higher
11 Closing contact pressure N 2000±200(20kA),

If you would like a quotation or further information on this product, please fill in the form below and we will reply to you within 1 working day.

Fill out my online form.