VS1 Series High-Voltage Vacuum Circuit Breaker
The VS1 (ZN63A) indoor high-voltage vacuum circuit breaker is switching equipment designed for 12 kV power systems, serving as the control and protection unit for electrical installations in industrial and mining enterprises, power plants, and substations. Owing to the inherent superior performance of vacuum circuit breakers, they are particularly well suited for applications requiring frequent operation at rated current or repeated interruption of short-circuit currents. This circuit breaker complies with the requirements of GB 1984-89 “Alternating-Current High-Voltage Circuit Breakers,” JB 3855-1996 “Indoor AC High-Voltage Vacuum Circuit Breakers, 3.6–40.5 kV,” and DL 403-2000 “Technical Specifications for Ordering High-Voltage Vacuum Circuit Breakers, 10–40.5 kV,” as well as the relevant requirements of IEC 56 (Publication 87).
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VS1 Series High-Voltage Vacuum Circuit Breaker
The VS1 (ZN63A) indoor high-voltage vacuum circuit breaker is switchgear designed for 12 kV power systems, serving as the control and protection device for electrical installations in industrial and mining enterprises, power plants, and substations. Owing to the inherent advantages of vacuum circuit breakers, they are particularly well suited for applications requiring frequent operation at rated current or repeated interruption of short-circuit currents. This circuit breaker complies with the requirements of GB 1984-89 “AC High-Voltage Circuit Breakers,” JB 3855-1996 “Indoor AC High-Voltage Vacuum Circuit Breakers, 3.6–40.5 kV,” and DL 403-2000 “Technical Specifications for Ordering 10–40.5 kV High-Voltage Vacuum Circuit Breakers,” as well as the relevant requirements of IEC 56 (publication No. 87). The circuit breaker features an integrated design that combines the operating mechanism with the breaker body, arranged in a front-to-back split configuration, and incorporates reliable interlocking functions. It can be installed as a fixed unit or mounted on a chassis to form a handcart unit.
Terms of Use:
Ambient temperature: +40℃ to -15℃
Ambient humidity: daily average relative humidity < 95%
Daily average vapor pressure ≤ 2.2 × 10⁻⁵ MPa
Monthly average relative humidity < 90%
Monthly average vapor pressure: 1.8 × 10⁻³ MPa
Altitude: ≤1000m
Seismic intensity: <8 degrees
The equipment shall be installed in locations free from dripping water, flammable and explosive hazards, corrosive chemical gases, and severe vibration.
Special Usage Conditions: If customers deviate from the normal operating conditions, they may negotiate with the manufacturer for custom manufacturing.
Technical Parameters of Circuit Breakers
| Rated voltage | 12kV |
|---|---|
| Rated frequency | 50Hz |
| Rated lightning impulse withstand voltage (phase-to-phase, phase-to-ground) / interrupting gap | (75) / 85 kV (peak) |
| Rated 1-min power-frequency withstand voltage (phase-to-phase, phase-to-ground) / interrupting gap | (42) / 48 kV (RMS) |
| Rated Operating Sequence | O-t-t-CO-t'-CO |
| Circuit breaker model | Rated current | Rated breaking current (kA) | Rated short-circuit making current (peak) kA | Rated short-circuit duration (s) | Rated short-circuit current breaking operations (times) | Mechanical Life (cycles) |
| VS1-12/... | 630 1250 | 20/25 | 50/63 | 4 | 100 | 20000 |
1250 1600 2000 2500 | 31.5 | 80 | 4 | 50 | 20000 | |
1250 1600 2000 2500 3150 | 40 | 100 | 4 | 30 | 10000 | |
3150 4000 | 50 | 125 | 4 | 20 | 10000 |
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Phone: +86-0574-87916011 (International)
E-mail: export@tianandl.com
Phone: +86-0574-87900000 (Domestic)
Email: sales@tianandl.com
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