Novatek rn series single phase voltage monitoring protection relays novatek rn 113 p the novatek rn 113 single phase 220v 50hz voltage monitoring relay is designed to turn off home consumer or industrial equipment in case of unallowable voltage fluctuations and when the voltage has returned to normal values it will automatically turn the equipment back on after user defined time delay p p the rn 113 can switch a power load up to 7 0kw 32a using it s internal output contacts loads