Siemens SIPROTEC 5 7UT87 Transformer Differential Protection Relay
The SIPROTEC 7UT87 is a high-performance differential protection relay from Siemens, engineered for advanced transformer protection in modern power systems. It supports up to 20 current and 4 voltage inputs, ensuring scalable, reliable, and precise fault detection for multi-winding transformers
Technical Specifications
Up to 3 differential protection functions with additional stabilization
5 ground fault differential protection functions
9 × 3-phase current measuring points
5 × 1-phase current measuring points
5 × 3-phase voltage measuring points
20 current transformers, 4 voltage transformers
15–27 binary inputs, 22–38 binary outputs
Housing width: 2/3 × 19” to 2/1 × 19”
Fully modular SIPROTEC 5 design with flexible I/O configuration
5 ground fault differential protection functions
9 × 3-phase current measuring points
5 × 1-phase current measuring points
5 × 3-phase voltage measuring points
20 current transformers, 4 voltage transformers
15–27 binary inputs, 22–38 binary outputs
Housing width: 2/3 × 19” to 2/1 × 19”
Fully modular SIPROTEC 5 design with flexible I/O configuration
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