Product Overview

The Siemens 7UT5131-5CB01-1BA0/KL is a numerical differential protection relay from the SIPROTEC 5 series. It is designed for use in medium‑voltage and high‑voltage power systems, where it provides fast and selective fault detection for power transformers, generators, electric motors, and short overhead or cable transmission lines. The relay ensures reliable isolation of internal faults to minimize damage to equipment and maintain grid stability.

➨ Rated Current (CT): 1 A or 5 A

➨ System Voltage (PT): 100-240 V AC / 380-480 V AC

➨ Inputs: 4 x Current Transformer + 3 x Potential Transformer + 3 x Digital Input

➨ Outputs: 4 x trip relays + 1 x alarm

➨ Operating Temperature: –25 °C to +60 °C

Applications & Use Cases

➞ Differential Protection for Transformers: Provides high-speed protection for two and three-winding transformers of all voltage levels, detecting internal short circuits and isolating faults in milliseconds.

➞ Generator and Motor Protection: Safeguards rotating electrical machines against internal faults like stator winding faults.

➞ Backup Protection: Integrates backup overcurrent protection (DMT/IDMT), earth-fault protection, and thermal overload protection for comprehensive equipment safety.

Catalog

PLC: GE, FANUC, Schneider

DCS: ABB , Siemens, MOORE , Foxboro , Westinghouse , YOKOGAWA

ESD: Triconex, HIMA, Bently Nevada, ICS Triplex

Excitation cards: ABB, GE

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