Technology Research 40101001 50A Automatic Transfer Switch with Reverse Polarity Protection

The Technology Research 40101001 is a generator-dominant automatic transfer switch designed for RVs, marine vessels, and recreational vehicles. This hardwired 50-amp transfer switch provides seamless switching between shore power and generator power sources, ensuring uninterrupted electrical service for your vehicle.

Key Features:

• 50-amp capacity rated for 120V/240V AC operation
• UL-listed to UL1008 standards with capability up to 80A
• Generator-dominant operation with 30-second delay when both power sources are available
• LED indicator for reverse polarity and open ground protection
• Mechanical interlocking contactors with dual 80A rated Chint contactors
• Automatic power restoration with 3-4 second delay when switching back to shore power
• Time delay at power up to protect sensitive electronics
• Compact design fits neatly inside RV electrical compartments

This permanent transfer switch connects directly to your power distribution box and automatically manages power between two sources. It automatically transfers to generator power when energized after a 30-second delay, and when both shore power and generator power are available, the generator takes precedence after a 30-second delay. Upon shutting down the generator, shore power activates after a 3-4 second delay, ensuring continuous and uninterrupted power supply. Note that this unit does not provide surge protection.