Vacuum circuit breaker VS1-12
Automatic vacuum circuit breaker with spring-motor operating mechanism VS1-12 is designed for switching AC three-phase current with a frequency of 50 Hz with an isolated or earthed through an arc-suppression reactor neutral with a rated voltage of up to 12 kV.
The VS1-12 circuit breaker is used to control and protect electrical equipment at industrial enterprises, distribution and transformer substations. It is available in fixed (for KSO cubicles) or draw-out (for switchgear panels, LV switchgear) versions, featuring high electrical endurance and increased mechanism reliability.
The VS1-12 circuit breaker is used to control and protect electrical equipment at industrial enterprises, distribution and transformer substations. It is available in fixed (for KSO cubicles) or draw-out (for switchgear panels, LV switchgear) versions, featuring high electrical endurance and increased mechanism reliability.
Environmental conditions
- Operating temperature range: from -30°C to +40°C.
- Altitude above sea level: no more than 1000 m.
- Relative air humidity at +21°C is no more than 85%.
- The environment is non-explosive, atmosphere type II (industrial), the content of corrosive agents according to GOST 15150, ambient air dustiness up to 10 mg/m3, the value of environmental mechanical factors must correspond to group M6 according to IEC 60721-3-3.
Technical specifications:
Description | Unit | Value | |
Maximum operating voltage | kV | 12 | |
Short-duration withstand voltage | 1-minute power-frequency | 42 | |
1-minute power-frequency | 75 | ||
Operating frequency | Hz | 50 | |
Rated current | А | 630, 1250, 1600, 2000, 2500, 3150, 4000 | |
Rated breaking current | kA | 20, 25, 31.5, 40 | |
Short-time withstand current, for 3 s | 20, 25, 31.5, 40 | ||
Peak withstand current | 50, 63, 80, 100 | ||
1-minute power-frequency withstand voltage for the secondary circuits of the circuit breaker | kV | 2 | |
Power supply for closing/opening coil circuits | V | AC 110, AC 220, DC 110, DC220 | |
Power supply for charging motor circuits | V | AC 110, AC 220, DC 110, DC220 | |
Rated number of short-circuit current breaking operations | cycles | 50 | |
Rated operating sequence | O – 0.3 s – CO -180 s – CO | ||
Mechanical endurance | cycles | 20000 | |
Overall and mounting dimensions
VS1-12/ (630..1600) – (20..40) draw-out version
VS1-12/ (1600..3150) – (20..40) draw-out version
VS1-12/ (630..1600) – (20..40) Fixed version
VS1-12/ (1600..3150) – (20..40) Fixed version