Hager HI406R 4-Pole 125A Transfer Switch

The Hager HI406R is a robust 4-pole transfer switch engineered to facilitate seamless and reliable switching between primary mains power and secondary generator power sources. With a rated current of 125A and support for AC input voltages between 380V and 690V, this device serves as a critical component in electrical distribution systems, providing stable power management for demanding industrial and commercial environments.

Advantages

This transfer switch offers exceptional operational reliability, ensuring that power transitions are handled safely and efficiently. Its 4-pole configuration allows for the complete isolation of all phases and the neutral conductor, which is essential for maintaining electrical safety during power source switching. The high build quality associated with the Hager brand ensures long-term durability and consistent performance even under continuous load conditions, making it a dependable choice for critical infrastructure.

Suitable for

• Industrial manufacturing facilities
• Commercial office buildings
• Data centers requiring backup power
• Large-scale electrical distribution boards

When it may not be suitable

This device is not intended for residential applications with low power requirements, as its 125A rating and physical dimensions are optimized for heavy-duty industrial or commercial electrical panels. It is also not suitable for DC power systems or applications requiring automated smart-grid switching without additional control logic.

Key specifications

• Number of poles: 4
• Rated operational current: 125A
• Rated operational voltage: 380V to 690V AC
• Switching type: Manual transfer

How to use

The Hager HI406R should be installed by a qualified electrician within a suitable distribution enclosure. The device is mounted onto a standard DIN rail or base plate depending on the specific installation requirements. Input cables from the mains supply and the generator must be connected to the designated terminals, ensuring that all connections are tightened to the manufacturer's specified torque settings. Once installed, the switch is operated manually to toggle between the two power sources as needed.

What to consider before purchase

• Verify that the 125A rating is sufficient for your total load requirements.
• Ensure the enclosure has adequate space for a 4-pole device.
• Confirm that your electrical system voltage falls within the 380V-690V range.
• Check local electrical regulations regarding the installation of manual transfer switches.

Usage recommendations

Always ensure that the generator is properly synchronized or that the mains power is fully disconnected before operating the switch to prevent electrical arcs or damage to connected equipment. Regular inspection of terminal connections is recommended to maintain optimal conductivity.