Overview
ZN63(VS1)-12 indoor medium-voltage vacuum circuit breaker (hereinafter referred to as the circuit breaker) is used in 12kV power systems as an indoor switchgear device, serving as the protection and control unit for power grid equipment and industrial enterprise power systems. Due to the unique advantages of the vacuum circuit breaker, it is particularly suitable for applications that require frequent operation at rated working currents or the frequent interruption of short-circuit currents.
The circuit breaker features an integrated design with the operating mechanism and the main body, and it can be used as a fixed installation unit or, when equipped with a dedicated push mechanism, it can form a withdrawable unit.
Operating Conditions
1.Environmental temperature: not higher than 40 ° C, not lower than -10 ° C (allowed for storage and transportation at -30 ° C).
2.Altitude: not exceeding 1000m. (If it is necessary to increase the altitude, the rated insulation level should be correspondingly increased)
3.Relative humidity: The daily average value is not greater than 95%, the daily average saturated vapor pressure is not greater than 2.2 × 10 * Mpa, and the monthly average is not greater than 1.8 × 103 Mpa.
4.The seismic intensity does not exceed 8 degrees;
5.There is no fire, explosion hazard, serious pollution, Places subject to chemical corrosion and severe vibration.
Technical Data
| Item | Unit | Parameter | ||
| Rated voltage | kV | 12 | ||
| Rated insulation level | Rated lightning impulse withstand voltage (peak) | kV | 75 | |
| 1min power frequency withstand voltage | kV | 42 | ||
| Rated short circuit breaking current | KA | 20/25 | 31.5 | |
| Rated current | A | 630/1250 | 630/1600/2500 | |
| Rated thermal stable current (effective value) | KA | 20/25 | 31.5 | |
| Rated dynamicstable current (peak value) | 63 | 80 | ||
| Rated short-circuit making current (peak value) | 63 | 80 | ||
| Rated short-circuit breaking current breaking times | Times | 50 | ||
| Secondary circuit power frequency withstand current | V | 2000 | ||
| Rated operating sequence | / | O-0.3s-CO-180s-CO | ||
| Rated thermal stability time | s | 4 | ||
| Rated single/back to back capacitor bank breaking current | A | 630/400 | ||
| Mechanical life | Times | 20000 | ||
Overall and mounting dimensions(mm)
