nz7-400h/4/250 chint 250a 4 pole automatic changeover switch

Why Choose the Chint NZ7-400H/4/250 Automatic Transfer Switch?

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.

Key Advantages

• Heavy duty automatic transfer switch for critical power applications.
• 250A rated operational current for larger distribution systems.
• 4 pole switching including neutral conductor transfer.
• Automatic changeover between normal and standby power supplies.
• Mechanical and electrical interlocking helps prevent simultaneous source connection.
• Suitable for mains-to-mains and mains-to-generator transfer systems.

Key Features

• Chint NZ7 Series Automatic Transfer Switch.
• 250A rated operational current.
• 400AF frame size.
• 4 pole configuration for three-phase four-wire systems.
• 400V AC 50Hz rated operational voltage.
• CB Class automatic transfer switching equipment.
• Integrated digital controller for power source monitoring.
• Manual and automatic operating modes.
• Dual interlock protection for safe source transfer.
• Fixed mounting with front connection terminals.

Reliable Automatic Power Transfer for Larger Electrical Loads

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.

Typical Applications

• Standby generator changeover panels.
• Main distribution boards and switchboards.
• Industrial manufacturing facilities.
• Commercial buildings and offices.
• Healthcare and emergency power systems.
• Data centres and telecommunications infrastructure.
• Critical building services and utility systems.