The 3WT air circuit breaker is a type of circuit breaker produced by Siemens. It has the advantages of safety and reliability, easy operation, modularity and low power consumption. Its rated current is 630 to 3200 A and its rated working voltage is AC 440 V.
The Siemens 3WT air circuit breaker series is designed for currents up to 3200 A and offers modular construction, safety features, and optional electronic trip units. The document provides an overview of the breaker’s mechanical design, operation mechanisms, and available accessories.
Detailed sections describe the electronic trip unit functions, optional auxiliary devices, technical specifications, and installation guidelines, including wiring diagrams and safety interlocks for both drawer‑type and fixed‑type configurations. This manual is written in Chinese.
| Rated current | 630 A – 3200 A |
|---|---|
| Rated voltage | AC 440 V |
| Breaking capacity | 50/65 kA |
| IP protection rating (cabinet door) | IP40 |
| Short‑circuit withstand current | 110 kA (peak) |
The 3WT series is rated for currents from 630 A up to 3200 A.
It can be equipped with manual, electric, or combined manual‑electric operating mechanisms, including drawer‑type and fixed‑type options.