Tronic Automatic Transfer Switch 250A

Our review

The Tronic Automatic Transfer Switch 250A is a controller built around a microprocessor that watches the incoming mains supply. When it detects a loss of main power, or a phase that has swung into overvoltage or undervoltage, the unit starts its transfer sequence. That makes it relevant to anyone running a backup supply, such as a generator or second source, who wants the changeover handled automatically rather than by hand.
Before buying, confirm the current rating matches your installation and that your setup actually needs automatic changeover rather than a manual switch. Because no specifications are listed here, check the full details on the Sokonia listing. Compare it with other ATS units on sensing accuracy, how they handle voltage faults, and whether their control logic suits your loads. The 250A rating puts it in larger installations, so match it to your supply capacity.