The ZN63(VS1)-12 series indoor side-mounted high-voltage vacuum circuit breaker is a high-voltage switching device suitable for three-phase power systems with a rated voltage of 12kV and a frequency of 50Hz. It is mainly used for protection and control, especially in environments requiring frequent operations at rated currents or multiple short-circuit breaking operations. This series features a fixed installation design, suitable for fixed switchgear, and can be used independently or in ring network power supply, box transformers, or various non-standard power systems.
| Type | ZN63(VS1)-12 Series |
| Rated Voltage | 12KV |
| Operating Voltage | 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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