Siemens SIPROTEC 7UT612 Transformer Differential Protection Relay – 4xI 4xV

Application: Transformers (1-/3-phase), motors, generators, short lines, busbars (up to 7 feeders) ، Protection Functions: ، Differential protection (phase-segregated) ، Sensitive stage for low-fault currents ، Fast tripping for high-fault currents ، Transformer inrush restraint ، Phase and ground overcurrent protection ، Overload protection with/without temperature input ، Negative-sequence protection ، Breaker failure protection (50BF) ، Low/high-impedance restricted earth fault (REF) protection ، Control Functions: ، Commands for circuit-breaker and isolator control ، Local/remote control via keyboard, binary inputs, DIGSI 4, or SCADA ، User-defined logic with CFC (Custom Function Chart) ، Monitoring Functions: ، Self-supervision and trip-circuit supervision ، Oscillographic fault recording ، Continuous differential and restraint current measurement ، Transformer thermal monitoring via external thermo-boxes ، Communication Interfaces: ، Front PC port for DIGSI 4 configuration ، IEC 61850 Ethernet, IEC 60870-5-103, PROFIBUS-FMS/DP, MODBUS, DNP 3.0 ، Service/modem interface, temperature monitoring connection ، Time synchronization via IRIG-B / DCF 77 ، Features: ، Integrated thermal replica for winding supervision ، Flexible parameterization for various transformer configurations ، Proven SIPROTEC 4 platform with more than 1 million units in service worldwide