ProtectionMeteringBuilt-in complex relay function (refer to U-series selection table)Current element protection: OCR,OCGRDirectional relay function: SGRMotor protection: THR, NSOCR, 51LRCharacteristic curveInverse Han, Strong Inverse, Early Inverse, Definite, Long HanKEPCO anti-Korean poetry, KEPCO strong anti-Korean poetryFault information (save up to 32)Fault waveform (60 cycles/each save up to 4)1m sec maritime driving information historyControl and MonitoringCommunicationAlarm contact provided (5 contacts)Electrically isolated input contact (2 contacts)Provides electrically insulated input contacts (11)Dedicated interface front RS-232 portRear RS-485 port for upper level communicationMODBUS RTU protocolConvenience Draw-out structure for easy inspection and A/SFree voltage control power (AC/DC 110 ~ 5V)