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The ZN63 (VS1) -12 series indoor fixed high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor switchgear with a rated voltage of 12kV. It can be used for control and protection of industrial and mining enterprises, power plants and substations, electrical facilities, and is suitable for frequent operation in places. By integrating the operating mechanism with the circuit breaker body, it can be designed as a fixed installation unit or equipped with a dedicated propulsion mechanism to form a handcart unit for use. The main circuit section can be equipped with integral sealing columns to achieve miniaturization, high reliability, and maintenance free of Circuit breakers. It can be used with KYN28A-12 (GZS) and other Mid mounted handcart style switchgear, and can also be used with XGN series Fixed Switchgear.
Model Meaning
Usage environment
1. Environmental temperature: not higher than 40 ℃, not lower than -10 ℃ (allowed for storage and transportation at -30 ℃);
2. Altitude: not exceeding 1000m. If the altitude is increased, the rated insulation level will correspondingly increase;
3. Relative humidity: daily average not exceeding 95%, daily average saturated vapor pressure not exceeding 2.2 × 10-3MPa, monthly average not exceeding 1.8 × 10-3MPa;
4. Seismic intensity: not exceeding level 8;
5. A place without fire, explosion, serious pollution, chemical corrosion, and severe vibration.
Technical Parameter
| NO. | item | Unit | Data | |||||
| 1 | Rated voltage | kV | 12 | |||||
| 2 | Max. working voltage | kV | 12 | |||||
| 3 | Rated Current | A | 630, 1250 | 630,1250,1600, 2000,2500, 3150 | 1250, 1600,2000, 2500,3150, 4000 | |||
| 4 | Rated short-circuit breaking current | kA | 20/25 | 31.50 | 40 | |||
| 5 | Rated short-circuit closing current (peak) | kA | 50/63 | 80 | 100 | |||
| 6 | Rated peak withstand current | kA | 50/63 | 80 | 100 | |||
| 7 | 4s rated short-circuit withstand current | kA | 20/25 | 31.50 | 40 | |||
| 8 | rated insulation level | Working voltage withstand (before and after rated breaking)/1-minute power frequency voltage withstand | kV | Ground 42 (fracture 48) | ||||
| Impulse withstand voltage (before and after rated breaking)/Peak rated lightning impulse withstand voltage | Ground 75 (fracture 85) | |||||||
| 9 | Rated thermal stability time | s | 4 | |||||
| 10 | Rated operating sequence | O-0.3S-CO-180S-CO | ||||||
| 11 | mechanical life | Times | 20000 | |||||
| 12 | Rated short-circuit breaking current breaking times | Times | 50 | |||||
| 13 | Rated closing voltage of operating mechanism (DC) | V | AC、DC 110,220 | |||||
| 14 | Rated opening voltage of operating mechanism (DC) | V | AC、DC 110，220 | |||||
| 15 | Contact opening distance | mm | 11±1 | |||||
| 16 | Overtravel (compression length of contact spring) | mm | 3.5±0.5 | |||||
| 17 | Three phase opening and closing bounce time | ms | ≤2 | |||||
| 18 | Contact closing bounce time | ms | ≤2 | |||||
| 19 | Average opening speed | m/s | 0.9~1.2 | |||||
| Average closing speed | m/s | 0.5~0.8 | ||||||
| 20 | Opening time | Under the highest operating voltage | s | ≤0.05 | ||||
| 21 | At the lowest operating voltage | ≤0.08 | ||||||
| 22 | close time | s | 0.1 | |||||
| 23 | Main circuit resistance of each phase | μΩ | 630≤50 | 1250≤45 | ||||
| 24 | Allowable wear and accumulated thickness of dynamic and static contacts | mm | 3 | |||||
Installation size
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