Bi-power Relays LY Power-switching Compact General-purpose Relays The standard models include models that are compliant with the UL, CSA, and SEV safety standards and with the Electrical Appliances and Material Safety Act. Equipped with an arc barrier for arc interruption. Withstand voltages up to 2,000 V. New built-in diode and built-in CR circuit models have joined the series. The lineup also includes models that are compliant with the LR and V.