NDQ5-4000 Series Automatic Transfer Switching Equipment (ATSE)
Updated：July 17,2026 17:48PM
The NDQ5-4000 automatic transfer switching equipment is a high-performance PC-class automatic transfer switch with a utilization category of AC-33A. Suitable for emergency power supply systems with rated operational voltage up to AC415V rated frequency of 50/60Hz and rated current from 400A to 4000A. It is used for automatic transfer between two power sources to ensure the continuous safe and reliable operation of important loads.
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Features of NDQ5-4000 Series
- Neutral overlapping transfer function, with overlapping time customizable according to customer requirements.
- Patented contact anti-bounce technology helps prevent arc reignition, achieving utilization category AC-33A.
- Multiple short-time withstand current ratings meet the short-circuit withstand requirements of different system loads, up to 100kA.
- Supports in-phase transfer, delayed transfer, parallel transfer, and neutral overlapping transfer functions.
Technology data of NDQ5-4000 Series
| ATSE Model | NDQ5-4000 | ||||
| Rated operational current Ie (A) | 400、500、630 | 800、1000、1250、1600 | 2000、2500 | 3200、4000 | |
| Rated operational voltage Ue (V) | AC220/230/240、AC380/400/415 | ||||
| Number of poles | 3, 4, N3 (products with neutral overlapping transfer function) | ||||
| Utilization category | AC-33A | ||||
| Rated short-time withstand current Icw (kA) | AC380/400/415V |
66/3s 85/1s 100/60ms |
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| Equipment class | Dedicated PC class | ||||
| Transfer category | In-phase transfer / delayed transfer / parallel transfer | ||||
| Position of main contacts | Three-position | ||||
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Factory Address：Pudong, Shanghai, China / Jiaxing, Zhejiang, China
Technical Support：+86-400-99-02706 Email：rfq@nader-circuit-breaker.com   |