The ZN63(VS1)-12 series vacuum circuit breaker is a high-voltage indoor switchgear designed for 11kV/12kV rated voltage and three-phase AC 50Hz electrical systems. It is widely used in industrial, mining, power plants, and substations for control and protection of electrical facilities. The device is designed in a drawer-type configuration, which can be used as a fixed installation unit or combined with a dedicated push mechanism for a drawer unit, catering to various installation and usage needs. The vacuum circuit breaker is known for its high reliability, durability, and low maintenance, making it especially suitable for environments requiring frequent operations.
| Type | ZN63(VS1)-12 Series |
| Rated Voltage | 11kV/12kV |
| Operating Voltage | 11kV/12kV |
| Rated Current | 630A、1250A、1250A、1600A、2000A、2500A、3150A、4000A |
| Rated Short-Circuit Breaking Current(Rated Thermal Stable Current-RMS) | 20/25kA、31.5kA、40kA |
| Rated Short-Circuit Making Current(Peak) | 50/63kA、80kA、100kA |
| 4s Rated Short-Circuit Withstand Current4s | 20/25kA、31.5kA、40kA |
| Operating Withstand Voltage(Before/After Rated Breaking)/1min Power Frequency Withstand Voltage | To Ground42(Across Break48)kV |
| Impulse Withstand Voltage(Before/After Rated Breaking)/Rated Lightning Impulse Withstand Voltage Peak | To Ground75(Across Break85)kV |
| Rated Thermal Stable Time | 4s |
| Rated Operating Sequence | Open-0.3s-Close/Open-180s-Close/Open |
| Mechanical Life | 20000Times |
| Rated Short-Circuit Breaking Current Interrupting Times | 50Times |
| Operating Mechanism Rated Closing Voltage(DC) | ACV、DCV、110V、220V |
| Contact Gap | 11±1mm |
| Over-Travel(Contact Spring Compression Length) | 3.5±0.5mm |
| Three-Phase Opening/Closing Bounce Time | ≤2ms |
| Contact Closing Bounce Time | ≤2ms |
| Average Opening Speed | 0.9~1.2m/s |
| Average Closing Speed | 0.5~0.8m/s |
| Opening Timeat Operating Voltage | ≤0.05s |
| Opening Timeat Low Operating Voltage | ≤0.08s |
| Closing Time | 0.1s |
| Main Circuit Resistanceper Phase | 630≤55μΩ、1250≤50μΩ |
| Allowable Cumulative Wear Thicknessof Moving/Stationary Contacts | 3mm |
Ambient Temperature: Not exceeding 40℃, not lower than -10℃ (storage and transportation at -30℃ is allowed).
Altitude: Not exceeding 1000m. (If used at higher altitudes, the rated insulation level shall be increased accordingly.)
Relative Humidity: Daily average ≤95%; daily average of saturated vapor pressure MPa; monthly average >1.8*10.
Seismic Intensity: Not exceeding magnitude 8.
Operating Environment: Locations free from fire, explosion, severe pollution, chemical corrosion, and violent vibration.
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