Siemens SIPROTEC 5 7UT85 Transformer Differential Protection Relay

The 7UT85 Transformer Differential Protection Relay from Siemens is a high-performance solution designed for reliable protection of 2- and 3-winding transformers. Featuring expandable 8xI hardware, this relay supports up to 5 measuring points, ensuring precise monitoring and fast differential protection for high-voltage substations.

Ideal for utilities, electrical contractors, and substation operators in Mumbai, the 7UT85 relay combines robust technical performance with ease of deployment. Its modular design allows seamless expansion as your system grows, while delivering accurate and dependable transformer protection to safeguard critical infrastructure.

Key Features:

• Protection for 2- and 3-winding transformers
• Expandable 8xI hardware for flexible system configuration
• Supports up to 5 measuring pointsFast, accurate, and reliable differential protection
• Modular design for system growth and future upgrades
• Trusted availability from local suppliers in Mumbai
• Ideal for electrical contractors, substation operators, and power system engineers

Main function:

• 1 differential protection function (standard or auto transformer) with additional stabilization; up to 2 restricted ground-fault protection functions
• Interoperability of SIPROTEC 5 and SIPROTEC 4 line protection devices

Useable measuring points:

• 5 x 3-phase current measuring points,
• 3 x 1- phase current measuring points,
• 3 x 3-phase voltage measuring points;
• expandable to 3 sides

Inputs and outputs:

• 2 predefined standard variants with 8 current transformers
• 7 to 19 binary inputs
• 7 to 23 binary outputs

Hardware flexibility:

• Flexibly adjustable and expandable I/O quantity structure within the scope of the SIPROTEC 5 modular system

Width of housing:

• 1/3 × 19 inches to 2/1 × 19 inches

The SIPROTEC 5 7UT85 Transformer Differential Protection Relay delivers technical excellence, reliability, and local accessibility for professional applications in Mumbai.