Siemens Siprotec 5 7SJ85 Overcurrent & Feeder Protection Relay

The SIPROTEC 7SJ85 Advanced Feeder Protection Relay is a high-performance numerical relay designed for precise overcurrent and feeder protection in industrial and substation applications. Equipped with 4xI and 4xV inputs and expandable hardware, this relay offers modularity and flexibility for growing power systems.

Trusted by engineers and power system professionals, the SIPROTEC 7SJ85 ensures reliable fault detection, fast tripping, and secure operation, making it ideal for critical infrastructure. Available from authorized distributors in Mumbai, it combines technical excellence with ease of procurement.

Main function:

• Feeder and overcurrent protection for all voltage levels

Inputs and outputs:

5 predefined standard variants with

• 4 current transformers,
• 4 voltage transformers,
• 11 to 59 binary inputs,
• 9 to 33 binary outputs

Hardware flexibility:

• Flexibly adjustable and expandable I/O quantity structure within the scope of the modular SIPROTEC 5 system; 1/6 expansion modules can be added, available with large or small display, or without display

Housing width:

• 1/3 × 19 inches to 2/1 × 19 inches

Upgrade your electrical protection setup with the SIPROTEC 7SJ85 Advanced Feeder Protection Relay—engineered for reliability, efficiency, and future-ready expandability.