Transformer differential protection

SIPROTEC V virtualizes substation protection & control, scaling up to 60 IEDs on one server. Built on SIPROTEC 5 algorithms with IEC 61850 compliance, it simplifies operations while enhancing cybersecurity and sustainability.

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The SIPROTEC 7UT86 is a modular differential relay providing main protection for three-winding transformers. Its flexible hardware also serves as backup protection for connected cables, lines, and reactors.

The modular SIPROTEC 7UT85 is the main differential protection for two-winding transformers. Its flexible, expandable hardware also provides backup protection for subsequent assets like cables, lines, and reactors.

Protect complex multi-winding transformers with the SIPROTEC 7UT87. This modular differential protection relay is designed for transformers with up to 5 sides and numerous measuring points for versatile protection.

The SIPROTEC 7SX85 modular universal relay handles all protection, control, and automation tasks for 3-pole tripping. Its extensive function library ensures you pay only for the functions you apply.

Protect 2- & 3-winding transformers with the Reyrolle 7SR54. It supports all vector groups and includes standard IEC 61850 comms. The withdrawable element allows easy replacement, minimizing product life-cycle cost.

The Reyrolle 7SR242 provides protection, control, and monitoring for two-winding transformers, auto-transformers, and reactors. It supports all vector groups and connections, offering versatile application across multiple schemes.