This document describes the Siemens 3AH vacuum circuit breaker, highlighting its vacuum switch technology, maintenance-free operation, and technical…
The Siemens 3AH vacuum circuit breaker utilizes advanced vacuum switch technology, offering stable insulation performance and a constant contact resistance. It is designed for high breaking capacity and can operate up to 10,000 times without maintenance under normal conditions. The product features optimized arc extinguishing chambers and is suitable for various power system applications in China. This manual is written in Chinese.
| Rated Voltage | 12 kV or 24 kV |
|---|---|
| Rated Short-Circuit Breaking Current | Up to 40 kA |
| Rated Short-Circuit Making Current | Up to 40 kA |
| Thermal Stability Current | Up to 50 kA |
| Mechanical Life | 30,000 times |
| Maximum Arcing Time | < 15 ms |
| Operating Temperature Range | -25°C to +40°C |
| Altitude Limit | 1000 m |
Under normal conditions, the 3AH circuit breaker is maintenance-free for 10,000 operations or 10 years, whichever comes first.
The maximum rated short-circuit breaking current listed in the specifications is 40 kA.