NDQ5W Series Automatic Transfer Switch
Updated：July 17,2026 17:48PM
The NDQ5W Series automatic transfer switch is suitable for AC 50Hz/60Hz distribution systems with rated current from 200A to 6300A rated insulation voltage of 1000V and rated operational voltage of AC415V and below. It is used to automatically disconnect from one power source and connect to another power source.
2021 Quick Selection Guide »
Features of NDQ5W Series
- Multiple control types available: 2L, 2LB, QL, QLB, 3L, and 3LB types, suitable for important power supply applications.
- Manual/automatic switching: The controller performs automatic transfer control according to the preset process, and also allows users to manually exit automatic operation when needed.
- Display/measurement function: The controller uses a dedicated chip to collect and measure the status and parameters of the power supply, and displays the power parameters to users through the LCD screen.
Technology data of NDQ5W Series
| Model | NDQ5W-1600 | NDQ5W-2500 | NDQ5W-4000 | NDQ5W-6300 | |
| Number of poles | 3、4 | ||||
| Rated operational current Ie (A) at 40°C | 200、400、630、800、1000、1250、1600 |
630、800、1000、1250、 1600、2000、2500 |
800、1000、1250、1600、2000、2500、3200、4000 | 4000、5000、6300 | |
| Rated operational current of N pole (A) | 100%le | ||||
|
Rated operational voltage of controller Us (V) |
AC220/230/240 | ||||
|
Rated operational voltage of main circuit Ue (V) |
AC380/400/415 | ||||
|
Rated insulation voltage Ui (V) |
AC1000 | ||||
| Rated impulse withstand voltage Uimp (kV) | 12 | ||||
| Rated frequency f (Hz) | 50/60 | ||||
| Rated short-circuit breaking capacity Icn (kA) | 55 | 85 | 100 | 120 | |
| Rated short-circuit making capacity Icm (kA) | 121 | 187 | 220 | 204 | |
| Rated short-time withstand current Icw (kA, 1s) | 50 | 85 | 100 | 100 | |
| Electrical life | 10000 | 10000 | 6000 |
6000(4000A) 4000(5000A) 2000(6300A) |
|
| Mechanical life | maintenance-free | 15000 | 15000 | 12000(3P)10000(4P) | 7000(3P)6500(4P) |
| with maintenance | 30000 | 30000 | 15000 | 13000 | |
| Contact transfer time (ms) | 150 | ||||
| Transfer operating time (ms) | 350 | ||||
| Power-off time | 200ms + delay time (0.1–640s) | ||||
| Isolation function | |||||
| Equipment class | CB Class | ||||
| Utilization category | AC-33B | ||||
| Product certification | CCC、CB | ||||
| Note: ■ Standard configuration. | |||||
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Factory Address：Pudong, Shanghai, China / Jiaxing, Zhejiang, China
Technical Support：+86-400-99-02706 Email：rfq@nader-circuit-breaker.com   |