Industrial Automatic Transfer Switch 4P 250A 110V / 220V Grid to AC Generator

Industrial Automatic Transfer Switch 4P 250A 110V / 220V Grid to AC Generator

This industrial automatic transfer switch is a 4-pole, 250A rated changeover device that shifts power between grid supply and an AC generator at 110V / 220V, keeping critical loads energized when utility power drops.

Overview

This automatic transfer switch gives commercial and industrial panels a reliable way to move loads from grid power to a backup AC generator and back again. The 4-pole 250A configuration handles three-phase plus neutral circuits, making it suitable for shops, plants, and backup power installations. It is built for operators who need automatic changeover without manual intervention.

Built For Performance

• 4-pole switching configuration for three-phase plus neutral circuits
• 250A current rating supports demanding load panels
• Dual voltage support at 110V / 220V for grid and generator inputs
• Automatic transfer between grid supply and AC generator
• Industrial housing built for panel or enclosure mounting

Fits These Machines

• for grid-to-generator backup power panels
• for commercial distribution enclosures
• for industrial three-phase load circuits

On-The-Job Use

• Backup power changeover in commercial buildings
• Generator-backed load panels in industrial facilities
• Remote or off-grid power installations
• Automated switchover for critical circuits

Specs At A Glance

Good To Know

Q: Can this switch handle both single-phase and three-phase loads? A: The 4-pole design suits three-phase plus neutral circuits, and the 110V / 220V rating covers common single-phase and dual-voltage setups. Match your load calculation to the 250A rating before ordering.

Q: Does the transfer switch need an external controller? A: Automatic transfer switches of this type are typically wired with a sensing and control circuit to trigger changeover. Confirm your generator control scheme and wiring requirements with a qualified electrician before installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.