Fig. 8/1 SIPROTEC 4. 7UT6 differential protection relay for transformers, generators, motors and busbars. 7UT/ 7UT 7UT LS. P. a The numerical protection relays 7UT6 are primarily applied transformers. 7UT 2 windings. 7UT/ 2 up to 3 windings. 7UT 2 up to 5 windings. Manual This manual is valid for SIPROTEC ® 7UT differential protection; firmware bar protection for up to seven feeders with one single 7UT relay.

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The SIPROTEC 7UT differential protection relay are used for fast and selective fault clearing of short-circuits in transformers of all voltage levels and also in rotating electric machines like motors and generators, for short lines and busbars.

The protection relay can be parameterized for use with threephase and single-phase transformers. The specific application can be chosen by parameterization.


In this way an optimal adaption of the relay to the protected object can be achieved. Optionally, a low or high-impedance restricted earth-fault protection, a negative sequence protection and a breaker failure protection can be used. With external temperature monitoring boxes thermo-boxes temperatures can be measured and monitored in the relay.

Therefore, complete thermal monitoring of a transformer is possible, e. The relays provide easy-to-use local control and automation functions. The integrated programmable logic CFC allows the users to implement their own functions, e.

User-defined messages can be generated as well. The flexible communication interfaces are open for modem communication architectures with control system.

The protection relay can be parameterized for use with three-phase and single-phase transformers. In addition to this, a thermal replica is integrated for the supervision of the ohmic losses in the plant. Turn on more accessible mode.

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Siprotec 7ut612 Transformer Differential Protection Relay – Automation Device

Tools Digital Grid Digital Grid. Search Search term s Search. Products for Protection go. Capacitor Bank Protection go.


SIPROTEC 7UT – Digital Grid – Siemens

Combined Line Differential and Distance Protection go. Distance Protection Relay go. High Impedance Protection go.

High Speed Busbar Transfer go. Line Differential Protection go.

Motor and Generator Protection go. Overcurrent and Feeder Protection go. Protection for Rail Electrification go. Software for Protection go. Transformer Differential Protection go.


Transient Ground Fault Function go. Voltage and Frequency Protection go. Products for Substation Automation go. Products for Power Quality and Measurement go. Control Center Solutions go. Cyber Security Products and Solutions go. Smart Grid Software Solutions go.

Description Functions Downloads Configurator.