Low power (under-voltage) will damage any refrigeration appliance’s compressor and High Power (Over voltage) will damage any electrical or electronic equipment. The AVS30 is the most complete power protection device combining over-voltage, under-voltage, power-back surges and spikes/surge protection. Additionally, there is a delay when power returns to normal. This will ensure that the appliance is not switched on-off repeatedly during fluctuations nor it is subjected to a massive surge normally experienced when power returns after power cuts. Also accommodating a start up / inrush current of 110Amps.Furthermore, the New AVS30 Micro version has enhanced features allowing the user to set the delay time and monitoring the state of the voltage. Suitable for all domestic and industrial applications.