Product Description

ZN63(VBM7)-12 Indoor High Voltage Vacuum Circuit Breaker

VS1-12 side-mounted type vacuum circuit breaker is a kind of indoor high voltage switch device which is used in the AC Three-phase power system of frequency 50HZ,rated voltage 12KV to be the protection and control unit. Because of the special superiority of vacuum circuit breaker, especially suitable for applications that require frequent operation at rated operating Current or multiple open short-circuit breaking current location. It 1s especially suitable to the place requiring frequent operations.
VS1-12 side-mounted type vacuum circuit breaker adopts fixed installation, which is mainly used in the fixed switchgear. It can be used alone or used in ring network power supply system, box-type variable system and non-standard power supply system to protect and control the

Technical Specifications

NO. Item Units Parameters
1 Rated voltage kV 12
2 Rated cu rrent A 630~1250 1250 1250
3 Rated short-circu it breaking cu rrent kA 20 25 31.5
4 Rated short-circu it closing cu rrent kA 50 63 80
5 Rated peak withstand cu rrent kA 50 63 80
6 4S rated short-ci rcu it withstand current kA 20 25 31.5
7 Rated
insulation level
1min power freq uency voltage kV 42 (fracture 48)
Lightning Impulse Withstand voltage (peak) 75 (fracture 65)
8 Rated operat i ng sequence   O- 0.3S-CO-180S-CO
9 Mechanism life Times 10000
10 Opening times of rated short-circuit breaking current Times 50
11 Rated operator closing voltage(DC) V AC/DC  220,110
12 Rated operator open i ng voltage(DC) V AC/DC  220,110
13 Clearance between open contact mm 11 ± 1
14 Over-travel( Contact springcompression degree) mm 3.5 ± 0.5
15 Three phase points, closing bounce time ms ≤2
16 Contact closing bounce time ms ≤2
17 Average opening speed m/s 1.1 ± 0.2
18 Average closing speed m/s 0.6 ± 0.2
19 Operning
The highest operati n g voltage s ≤0.05
The lowest operating voltage ≤0.08
20 Closing time s 0.1
21 Dynamic and static contact allowed to weara cumulative thickness mm 3

Model Implication

Overall Dimensions