Chint NZ7-400H/4/250 automatic transfer switch, a 250A 4 pole ATS designed for automatic power source changeover in commercial, industrial and standby generator applications.
£3,091.61
The Chint NZ7-400H/4/250 is a heavy duty 4 pole automatic transfer switch (ATS) designed to provide reliable automatic changeover between two independent power supplies. It monitors the incoming sources and transfers connected loads to the standby supply when the preferred source becomes unavailable, helping maintain continuity of power in critical electrical systems.
As part of the Chint NZ7 Series Automatic Transfer Switching Equipment, this model combines advanced digital control, compact construction and dependable dual interlocking for safe and efficient source transfer. It is suitable for commercial, industrial and building services installations where automatic power resilience is essential.
With a 250A rated operational current, 4 pole switching and suitability for 400V AC three-phase four-wire systems, the NZ7-400H/4/250 is ideal for standby generator systems, main distribution boards, manufacturing facilities and larger commercial power distribution applications.
Automatic transfer switches such as the Chint NZ7-400H/4/250 are designed to monitor two power sources and transfer connected loads when the preferred supply fails or falls outside acceptable operating conditions. This helps reduce downtime and supports continuous operation of essential electrical systems.
The NZ7 Series uses intelligent control and dual interlocking to provide dependable transfer operation while preventing unsafe parallel connection of independent supplies. Its 250A capacity makes it well suited to larger control panels, distribution boards and standby power systems.
| Current | 250 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | Chint |
| Series | NZ7 Automatic Transfer Switching Equipment |
| Model | NZ7-400H/4/250 |
| Product type | Automatic Transfer Switch (ATS) |
| Frame size | 400AF |
| Rated operational current | 250A |
| Number of poles | 4 pole |
| Rated operational voltage | 400V AC |
| Frequency | 50Hz |
| Network type | Three-phase four-wire |
| Electrical equipment grade | CB class |
| Usage category | AC-33B |
| Control supply voltage | 230V AC 50Hz |
| Protection level | IP30, excluding main circuit terminals |
| Installation type | Fixed mounting |
| Connection type | Front connection |
| Standard | IEC/EN 60947-6-1 |
The Chint NZ7-400H/4/250 is used to automatically transfer electrical loads between two power supplies, helping maintain continuity of supply during mains failure or source interruption.
This model has a rated operational current of 250A.
Yes. It is a 4 pole automatic transfer switch, making it suitable for three-phase four-wire systems where neutral switching is required.
Yes. The NZ7 Series is suitable for mains-to-generator automatic changeover applications when correctly installed and configured within the electrical system.
The NZ7 Series is designed in accordance with IEC/EN 60947-6-1 for automatic transfer switching equipment.
Chint NZ7 automatic transfer switches are trusted by electrical contractors, panel builders and facilities engineers to provide dependable automatic power transfer and resilient electrical distribution in commercial and industrial installations.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...