Siemens SIPROTEC 5 7SD87 Line Differential Protection Relay

The SIPROTEC 7SD87 Differential Protection Relay is a cutting-edge solution from the SIPROTEC 5 series, engineered for high-speed, reliable line differential protection in Mumbai’s power networks. Featuring 4xI 4xV inputs and modular, expandable hardware, it supports both 1-pole and 3-pole fast tripping, ensuring rapid fault detection and selective isolation of faulty lines or cables.

Designed for overhead lines, underground cables, and complex multi-ended infeed systems, the SIPROTEC 7SD87 Differential Protection Relay delivers precise protection even in demanding environments. Its modular architecture allows easy customization and integration with other SIPROTEC devices, offering scalability for future upgrades.

Ideal for utilities, EPC contractors, and industrial power operators, this relay enhances system stability, reduces downtime, and ensures operational safety. With advanced features like adaptive differential protection algorithms, ground fault detection, and power quality monitoring, it provides comprehensive line protection and system reliability.

Features

Main function:

• Differential Protection
• Interoperability of SIPROTEC 5 and SIPROTEC 4 line protection devices

Tripping:

• 1-pole and 3-pole, minimum tripping time: 9 ms

Inputs and outputs:

12 predefined standard variants with

• 4/4 or 8/8 current transformers / voltage transformers,
• 5 to 31 binary inputs,
• 8 to 46 binary outputs

Hardware flexibility:

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

Housing width:

• 1/3 × 19 inches to 2/1 × 19 inches

As standard:

• Conformal coating

Available from trusted suppliers and dealers in Mumbai, the SIPROTEC 5 7SD87 Differential Protection Relay is the preferred choice for engineers and power system professionals seeking fast, accurate, and robust line protection solutions.