CHINT · Automatic changeover switch
Product overview
The CHINT NH40-3150/4 SZ is a four-pole, 3150A automatic changeover switch for normal and standby power supplies. It supports automatic and manual transfer and interrupts the load supply during changeover. The photographed unit is marked for 400V AC, AC-33iB duty, with a 220V motor operating mechanism.
Technical selection summary
| Exact nameplate model | NH40-3150/4 SZ |
|---|---|
| Series / device class | NH40SZ / PC class automatic transfer switching equipment |
| Poles / rated current | 4P / 3150A |
| Rated operational voltage Ue / frequency | AC 400V / 50Hz |
| Utilization category | AC-33iB |
| Short-time withstand current Icw | 50kA; confirm the specified duration for project coordination |
| Rated short-circuit making capacity Icm | 105kA |
| Rated insulation voltage Ui | 1000V |
| Rated impulse withstand voltage Uimp | 8kV |
| Motor mechanism supply | 220V, as marked on the pictured mechanism |
| Standard marking | GB/T 14048.11 |
| Operation | Automatic and manual transfer between two power sources |
| Series mounting reference, 3150A/4 | A 1010mm, A1 635mm, B 505mm, C 562mm; refer to the complete drawing |
Confirm the required controller functions, transfer sequence and control wiring with your enquiry. Select upstream protection and short-circuit coordination for the complete installation.
Typical applications
- Normal-to-standby power changeover
- High-current industrial distribution systems
- Generator and utility transfer arrangements that allow a supply interruption
Specify your enquiry
For a focused quotation, include:
- NH40-3150/4 SZ, 4P, 3150A and quantity
- Power-system voltage and motor/control supply
- Controller function, transfer sequence and mounting layout
Download CHINT NH40SZ English series catalogue (PDF)
Product reference images and drawings
