ZN63-12 Indoor High Voltage Vacuum Circuit Breaker (Modular) is our latest medium-voltage vacuumcircuit breaker product, which is suitable for air-insulated indoor switching systems. The circuit breakeradopts the new solid-sealed pole technology with a modular mechanism. At the same time, the circuitbreaker has perfect mechanical and electrical interlocking functions, and can be widely used in energy.industry, construction, infrastructure and other fields. The circuit breaker can perform frequent operation within the operating current range or open the shortcircuit current multiple times; The mechanical life can be up to 30,000 times, and the number offullcapacity short-circuit current breaks can reach 50 times. Circuit breakers are suitable for reclosing operations and offer high operational reliability and servicelife. The circuit breaker can be installed in the switchgear ither as fixed or withdrawable or mounted on aframe.
| 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 (Rated thermal stability current (RMS)) | KA | 20/25 | 31.5 | 40 |
| 5 | Rated short-circuit current (peak) | KA | 50/63 | 80 | 100 |
| 6 | Rated dynamic stability current (peak) | KA | 50/63 | 80 | 100 |
| 7 | 4S Rated withstand current | KA | 20/25 | 31.5 | 40 |
| 8 | Rated insulation level | Power frequency withstand voltage (rated breaking before and after)/1 min power frequency withstand voltage | KV | To earth 42 (Between open contacts) |
| Impulse withstand voltage(rated breaking before and after)/Lightning impulse withstand voltage (peak) | To earth 75 (Between open contacts |
| 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 current breaking time | Times | 50 |
| 13 | Rated operating mechanism closing voltage (DC) | V | AC,DC 110,220 |
| 14 | Actuator voltage of the floodgate (DC | V | AC,DC 110,220 |
| 15 | Contact stroke | mm | 11±1 |
| 16 | Overtravel(the length of contact spring compression) | mm | 3.5±0.5 |
| 17 | Three-phase points,closing phase asynchronous | 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 max.operating voltage | S | ≤0.05 |
| 21 | Under min.operating voltage | ≤0.08 |
| 22 | Closing time | S | 0.1 |
| 23 | The main circuit resistance of each phase | μΩ | 630≤50 | 1250≤45 |
| 24 | Allowed comision thickness for fixed and movable contacts | mm | 3 |
