Do STS provide a no-break supply?

Static Transfer Switches typically have an instantaneous transfer time between power sources but with Automatic Transfer Switches the transfer time can be 2-10ms or greater. In a generator installation, critical loads are generally connected to an uninterruptible power supply and battery power us used to cover the transfer time of the ATS device. Most servers can withstand an ATS switch over time if it is less than 10ms due the store electrical capacitance within their switch mode power supplies. Very sensitive loads, including medical apparatus may require the type of break-free supply provided by a static switch.



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