Overview
ZW8-12 outdoor high-voltage vacuum circuit breaker, three-phase AC 50Hz outdoor high-voltage switchgear. It is composed of operation, conductive circuit, insulation system, seal and shell, and the overall structure is three-phase common box type. It is used for 10kV rural power grid and urban power grid power system, as split, combined load current, overload current, short-circuit current and other similar places. Implement the standard GB1984-2003 "High Voltage AC Circuit Breaker" GB/T11022-1999 "Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards" IEC62271-100 "High Voltage AC Circuit Breaker"Normal Use Conditions
◆Ambient temperature: -40℃~+40℃; ◆Altitude: ≤3000m (if the altitude increases, the rated insulation level will increase accordingly); ◆The surrounding air can be polluted by dust, smoke, corrosive gas, steam or salt spray, and the pollution level is IV; ◆The wind speed does not exceed 34m/s (equivalent to 700Pa on the cylindrical surface); ◆Vibration or ground motion from outside of switchgear and control equipment can be ignored; ◆Special conditions of use. (If you need to apply it under normal conditions of use different from the above, please negotiate with us).The Main Technical Parameters
| Serial number | Name | Unit | Data | |
| 1 | Rated voltage | kV | 12 | |
| 2 | Rated current | A | 630 1250 | |
| 3 | Power frequency dry withstand voltage (1min) | kV | 42 | |
| 4 | Lightning impulse withstand voltage (peak) | 75 | ||
| 5 | Rated short-circuit breaking current | kA | 16 20 25 | |
| 6 | Rated short-circuit making current | 40 50 63 | ||
| 7 | Rated peak withstand current | kA | 40 50 63 | |
| 8 | 4s short-time withstand current | 16 20 25 | ||
| 9 | Nominal Operation Sequence | Points-0.3s-Combined points-18Os-Combined points | ||
| 10 | Rated short-circuit current breaking times | times | 30 10000 | |
| 11 | Mechanical life | |||
| Rated voltage of energy storage motor | times | |||
| 12 | Rated operating voltage Opening coil | V | DCorAC 220 | |
| Equipped with special spring operating mechanism Closing coil | V | DCorAC 220 | ||
| 13 | Rated current of overcurrent release | A | 5 | |
| 14 | Allowable wear thickness of static and dynamic contacts | mm | 3 | |
| 15 | Contact Spacing | mm | 11±1 | |
| 16 | Overtravel (contact spring compression length) | mm | +1.0 -0.3 | |
| 17 | Three-pole closing and opening of different periods | ms | ≤2 | |
| 18 | Contact closing bounce time | ms | ≤2 | |
| 19 | Average opening speed | m/s | 1.0±0.2 | |
| 20 | Average closing speed | m/s | 0.7±0.15 | |
| 21 | Opening time | at the highest operating voltage | s | 0.015-0.05 |
| at minimum operating voltage | s | 0.03-0.06 | ||
| 22 | when closing | s | 0.025-0.05 | |
| 23 | Main circuit resistance | μΩ | ≤120(with G≤200) | |