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Product Overview
The ZN63A (VS1) indoor high-voltage vacuum circuit breaker is a three-phase AC 50Hz indoor High-voltage Switchgear with a rated voltage of 7.2-12 kV. It serving as a protection and control unit for power grid equipment and power equipment in industrial and mining enterprises.
The circuit breaker complies with the national standards GB1984-89 "AC High Voltage Circuit breakers", JB3855-96 "3.6-40.5kV Indoor AC High Voltage Vacuum Circuit Breakers", DL403-91 "Technical Conditions for 10-35kV Indoor High voltage vacuum circuit breakers" and relevant international IEC standards, and has reliable interlocking function.
Main technical parameters
| Item | Unit | Data |
| rated voltage | kV | 12/24/40.5 |
| Rated frequency | Hz | 50 |
| Rated 1-minute power frequency withstand voltage (phase to phase, ground to ground, port) | kV | 42/65/95 |
| Rated lightning impulse withstand voltage (phase to phase, ground to ground, port) | kV | 75/118/125 |
| Rated operating sequence | O-0.3S-CO-180S-CO |
| Item | Unit | Circuit breaker model | |||||||||
| C-GIS | |||||||||||
| Rated current | A | 630 | 1250 | 1250 | 1600 | 2000 | 2500 | 1250 | 1600 | 2000 | 2500 |
| Rated short circuit breaking current | kA | 20/25 | 31.5 | 40 | |||||||
| Rated short-circuit closing current (peak) | kA | 50/63 | 80 | 100 | |||||||
| Rated continuous short-circuit time | s | 4 | 4 | 4 | |||||||
| Rated short-circuit current breaking times | times | 30 | 30 | 30 | |||||||
| mechanical life | times | 10000 | 10000 | 10000 | |||||||
Mechanical characteristic parameters of circuit breaker
| name | Unit | Data | ||
| Contact opening distance | mm | 12kV/9±1;24kV/13±1;40.5kV/18±1 | ||
| Overtravel | 3.5±0.5 | |||
| Three phase opening and closing at different stages | ms | ≤2 | ||
| Bouncing time of closing contact | ms | 12kV/ ≤ 2; 24kV/ ≤ 2; 40.5kV/≤3 | ||
| Contact pressure of closing contact | N | 20kA | 25kA | 31.5kA |
| 2000±200 | 2400±200 | 3100±200 | ||
| Average opening speed | m/s | 12kV/0.9~1.3; 24kV/1.1~1.6;40.5kV/1.8±0.2 | ||
| Average closing speed | 12kV/0.4~0.8; 24kV/0.6~1.0;40.5kV/0.8±0.2 | |||
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