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Selective fault clearing
Clear short-circuits fast in transformers across all voltage levels. Protect rotating electric machines, motors, generators, short lines and busbars. Configure the relay for 3-phase and 1-phase transformers.
Why SIPROTEC 7UT612?
The SIPROTEC 7UT612 differential protection relay quickly clears short-circuits to protect transformers, rotating electric machines, short lines and busbars.
Short-circuits in electrical infrastructure can cause significant downtime and damage. The SIPROTEC 7UT612 relay provides rapid and precise fault isolation. Parameterize it to minimize disruptions.
Enjoy integrated backup overcurrent protection and optional restricted earth-fault protection for comprehensive fault detection. Use thermal monitoring for complete transformer supervision.
This product is currently being phased out. Contact your Siemens representative for details.
Key benefits
Improve safety
Clear short-circuits rapidly and selectively to minimize damage and downtime. Protect critical assets like transformers, motors and generators from electrical faults.
Optimize monitoring
Monitor transformer thermal conditions and calculate oil hot-spots. Supervise your plant's ohmic losses using an integrated thermal replica. Extend equipment life and prevent costly failures.
Streamline automation
Integrate the relay into control systems using open interfaces like IEC 61850 and MODBUS RTU. Automate switchgear operations with user-defined CFC logic to simplify processes and reduce manual intervention.
Featured capabilities
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Diverse protection functions
Sensitive low-fault current detection, fast high-fault tripping, transformer inrush restraint, phase/ground-overcurrent, overload (with/without temp), negative-sequence, breaker failure, and low/high-impedance REF protection.
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Communication and control
Access easy local control and automation. Implement custom logic with CFC for switchgear automation and user messages. Connect via flexible interfaces: IEC 61850, PROFIBUS-DP and MODBUS RTU.
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Monitoring functions
Self-supervision of the relay, trip circuit supervision, oscillographic fault recording, and permanent differential and restraint current measurement, extensive scope of operational values.