An automatic transfer switch is a crucial part of any genset, whether you have a backup power generator or any standby generator model. When a power interruption occurs, an automatic transfer switch immediately transfers the load circuit from your permanent power source to your backup power equipmen. Because the transfer is safe, you can continue running your appliances, even with critical loading, sans fluctuations or damage. An automatic transfer switch also has a re-transfer feature that shifts the load circuit back to your permanent power source once power is restored.
An ASCO transfer switch is one such vital portable power generator accessory considered to be the best in-class technology that goes with any emergency power system. Each ASCO transfer switch product features a double-throw, interlocked construction that’s electrically operated, but can be held mechanically.
As with any automatic transfer switch for portable or backup generators, ASCO transfer switches have three basic components: a power switching device to transfer the load circuits to and from your permanent power source, a transfer logic controller that serves to monitor the status of your power sources while providing control signals to its power switching device, and the control power source, which supplies the operational power needed to activate the controller and the power switching device.
Why are ASCO transfer switches a necessary part of owning power generators, whether you have a standard genset model or a low noise generator set? For one, you need not start your generator manually, or go through the inconvenience of connecting it to a power switching device in the event of a power outage. Nor will you have to manually switch your home or small office over to generator power, then switch it back on to your utility’s power supply and turn your generator off once the power comes back on.
An ASCO transfer switch puts everything on full automatic. So when your power dies, it automatically signals your silent generator to start operating. As soon as this happens, your ASCO transfer switch connects your home or business to your portable power generator. Once power is restored, the automatic transfer switch simply turns off your generator for you, without your having to get up to do the tedious manual process in reverse.
An ASCO Series 300 Automatic Transfer Switch, for instance, has a switch position that indicates contacts rated from 10 amperes, 480 volt-AC. It will provide you with 400 amperes worth of close differential voltage sensors; adjustable retransfer time delay adjustable from 0 to 30 minutes; a 3-second time delay during power source outages; load transfer controlled timing adjustable from 0 to 8 minutes; signal lights indicating switch position; a 3-selector timer switch for ‘with load’, ‘without load’, and ‘off’; a simulation switch to test power failure; a solid neutral plate, and gold-plated engine start contacts.
If you run your whole home via portable power generators during incidents of power failure, or if you own a larger standby generator for your business, you’ll need an ASCO transfer switch installed between your main circuit breaker and your main electrical panel. On the other hand, if you only need a small amount of load, or if your portable power generator is unable to carry a huge wattage capacity, a sub-panel installed off your main electrical panel will benefit you with 100 amperes worth of power switching device.