Overview
The AB-YS-40.5 permanent magnet vacuum circuit breaker is composed of a uniquely designed permanent magnet actuator and a highly reliable intelligent controller.
This device is mainly used in medium-voltage overhead line power grids for switching load current, overload current, and short-circuit current, and features 0~3 automatic reclosing operations.
Product Features
Extremely high reliability
Completely maintenance-free throughout the entire service life
High mechanical life and electrical life
Compact overall size, light weight, easy to install
Standard relay protection and fast automatic reclosing functions
Operating Environmental Conditions
Ambient air temperature: -30~+60℃;
Altitude: no more than 2000 m;
Wind speed: no more than 34 m/s;
Vibration or seismic activity from outside the switchgear and control equipment is negligible;
Pollution level: Class IV;
Storage temperature: -40℃~+38℃.
Main Technical Parameters
Main Technical Parameters of the Circuit Breaker
| No. | Item | Unit | Parameter |
| 1 | Rated voltage | kV | 40.5 |
| 2 | Rated current | A | 1250/1600 |
| 3 | Rated frequency | Hz | 50/60 |
| 4 | Power-frequency withstand voltage 1 min (wet)/(dry) | kV | 80/95 |
| 5 | Lightning impulse withstand current (peak) | kA | 185 |
| 6 | Rated short-circuit breaking current | kA | 31.5 |
| 7 | Rated short-circuit making current (peak) | kA | 80 |
| 8 | Rated peak withstand current | kA | 80 |
| 9 | 4S short-time withstand current | kA | 31.5 |
| 10 | Rated operating sequence | 3-0.1s-close-open-3s-close-open-6s close-open-60s recovery | |
| 11 | Rated short-circuit current breaking operations | times (timcs) | 30 |
| 12 | Mechanical life | times (timcs) | 20000 |
| 13 | Permanent magnet actuator control voltage | V | DC220 |
| 14 | Secondary circuit 1 min power frequency | kV | 2 |
Main Mechanical Parameters of the Circuit Breaker
| No. | Parameter Name | Unit | Data |
| 1 | Contact gap | mm | 40.5 |
| 2 | Contact overtravel | mm | 1250/1600 |
| 3 | Opening speed | m/s | 50/60 |
| 4 | Closing speed | m/s | 80/95 |
| 5 | Contact closing bounce time | mm | 185 |
| 6 | Phase-to-phase center distance | mm | 31.5 |
| 7 | Three-phase opening/closing asynchronism | mm | 80 |
| 8 | Conductive circuit resistance of each phase | μΩ | 80 |
| 9 | Closing time | ms | 31.5 |
| 10 | Opening time | ms | 3-0.1s-close-open-3s-close-open-6s close-open-60s recovery |
| 11 | Weight | kg | 30 |
