RS422020-AA | ABB Three-Phase Overvoltage and Undervoltage Relay SPAU 130C

Part Number: RS422020-AAFeaturesCombined overvoltage and undervoltage protection relayThree-phase definite time or inverse time overvoltage stageThree-phase definite time undervoltage stageControl input for blocking of the function of the undervoltage stage by means of an external control signalAutomatic blocking of the undervoltage stage on loss of energizing voltageFully field-configurable output relay functionsFlexible matching of the relay to the intended protection applicationNumerical display of setting values, measured values, recorded fault values, indications etc.Serial interface for bus connection module and optical-fibre substation busContinuous self-supervision of relay hardware and software for enhanced system reliability and availabilityAuto-diagnostic fault indication to facilitate repair after detection of permanent internal relay faultPowerful software support for parametrization and supervision of the relayThe relay is a member of the SPACOM product family and PYRAMID®, ABB's coordinated protection and control concept