3UF5 SIMOCODE-DP System Motor Protection and Control Device

The 3UF50 Basic Unit2.5.4 Thermistor Motor ProtectionDescription of functionsOperationA Thermistor-detector circuit can be connected to versions 3UF50.1 to 3A...for direct temperature detection. Thermistor Motor Protection is an alternativeto external Earth Fault Detection.If the resistance values are exceeded (PTC) or fall below a certain value(NTC), the SIMOCODE-DP reacts either• by turning off the Contactor Controls QE1 / QE2 / QE3 or• with a warning,depending on the setting you have entered.NoteThermistor Motor Protection is an alternative to the external Earth FaultDetection function (version of unit).Types of detectorThree types of detector can be evaluated:Type Behaviour Characteristic Comments1 PTCBinaryRWarning or shutdown can be set.2 PTCAnalogKTY3 NTCAnalog1 2 υTable 7: Types of detector for Thermistor Motor ProtectionRR1 2υυTwo thresholds can be evaluated.1. Warning and2. ShutdownTwo thresholds can be evaluated.1. Warning and2. ShutdownGWA 4NEB 631 4286-02a 2-19