Overview
The ZW20-12F series outdoor high-voltage AC boundary vacuum circuit breaker is a high-voltage outdoor switchgear with a rated voltage of 12kV and three-phase AC 50Hz. It is mainly used for breaking and closing load current, overload current, and short-circuit current in rural power grids, urban power grids, and small power systems. The overall structure of the product is a three-phase common tank type, with three-phase vacuum interrupters enclosed in a metal tank, providing reliable voltage transformation performance and high insulation strength. The operating mechanism of this series of products is a spring energy storage type, available in electric and manual versions. The circuit breaker complies with the provisions of standards such as GB1804, DL403, and GB11022. Whether under normal operating conditions or fault conditions (especially short-circuit conditions), as long as it is within the range of the circuit breaker's pole-related parameters, it can ensure safe and reliable operation in power grids of the corresponding voltage level.
Main Technical Parameters
| No. | Name | Unit | Data |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current | A | 630 |
| 4 | Rated short-circuit breaking current | kA | 20 |
| 5 | Rated closing current peak | kA | 50 |
| 6 | Rated dynamic stable current peak | kA | 50 |
| 7 | 4s thermal stable current | kA | 20 |
| 8 | Rated operating sequence | Open-0.3s-Close-Open-180s-Close-Open | |
| 9 | Rated energy storage motor voltage | V | AC220 |
| 10 | Maximum/minimum energy storage motor voltage | V | AC242/187 |
| 11 | Rated closing operating voltage | V | AC220 |
| 12 | Maximum/minimum closing operating voltage | V | AC264/187 |
| 13 | Rated opening operating voltage | V | AC220 |
| 14 | Maximum/minimum opening operating voltage | V | AC264/143 |
| 15 | Closing asynchronism | ms | ≤ 2 |
| 16 | Opening asynchronism | ms | ≤ 2 |
| 17 | SF6 gas rated pressure (gauge pressure) | MPa | 0 |
| 18 | Rated short-circuit current breaking times | times | 30 |
| 19 | Mechanical life | times | 10000 |
Outline and Installation Dimensions
