Solid-state subcycle switching devices can eliminate the need for a UPS, if two sources of power are available.For more than 70 years, we've had the motor-generator and motor-alternator helping us to provide reliable conditioned power. And, believe it or not, the uninterrupted power supply (UPS) has been with us for more than 40 years. Some 12 to 14 years ago, one manufacturer, as an offshoot of the
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