Key facts
- Brand
- Siemens
- Model
- 3AH
- Documents
- 3
- Languages
- ZH
- Last added
- 2026-10-16
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Siemens 3AH Vacuum Circuit Breaker User Manual
This manual describes the Siemens 3AH vacuum circuit breaker, a high‑performance medium‑voltage breaker designed for Chinese power‑system requirements. It covers the product’s design, key technical parameters, mechanical life, and environmental limits.
The document includes detailed technical data, wiring diagrams, dimension drawings, operation principles, and ordering information, helping engineers and technicians install, commission, and maintain the breaker safely and efficiently. This manual is written in Chinese.
Siemens 3AH specifications
| 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 |
All Siemens 3AH documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
How many times can the 3AH circuit breaker operate without maintenance?
Under normal conditions, the 3AH circuit breaker is maintenance-free for 10,000 operations or 10 years, whichever comes first.
What is the maximum rated short-circuit breaking current for the 3AH series?
The maximum rated short-circuit breaking current listed in the specifications is 40 kA.
How many operations are maintenance‑free?
The breaker is maintenance‑free for the first 10,000 operations or 10 years, whichever occurs first.
What is the mechanical life of the 3AH breaker?
The mechanical life is rated at 30,000 operations.