Siemens SIPROTEC 5 7SD86 Line Differential Protection Relay
The SIPROTEC 7SD86 Line Differential Protection Relay is an advanced protection solution engineered for high-speed, reliable power system safety. With 4 current (4xI) and 4 voltage (4xV) inputs, this relay ensures precise detection of faults across feeders and transmission lines. Its 3-pole fast tripping capability minimizes downtime and protects critical electrical assets from damage.
Designed with expandable hardware, the SIPROTEC 7SD86 allows flexible configuration to meet the evolving needs of substations and industrial power networks. Ideal for utilities, industrial facilities, and high-demand infrastructure in Mumbai, this relay combines technical excellence with operational reliability.
Features include:
- Line Differential Protection for accurate fault detection
- High-speed 3-pole tripping to reduce system disturbances
- Expandable hardware for scalability and future-proofing
- 4xI & 4xV inputs for comprehensive monitoring
- Mumbai-focused availability, with trusted local suppliers for prompt delivery
- Upgrade your power protection system with the SIPROTEC 7SD86 Line Differential Protection Relay—trusted by engineers and utilities across Mumbai for robust, precise, and reliable electrical protection.
Features
Main function:
- Differential Protection
- Interoperability of SIPROTEC 5 and SIPROTEC 4 line protection devices
Tripping:
- 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
Application
- Line protection for all voltage levels with 3-pole tripping
- Phase-selective protection of overhead lines and cables with single-ended and multi-ended infeed of all lengths with up to 6 line ends
- Transformers and compensating coils in the protection zone
- Detection of ground faults in isolated or arc-suppression-coil-ground power systems in star, ring, or meshed arrangement
- Protection data communication over different distances and physical media, such as optical fiber, two-wire connections, and communication networks
- Interoperability of SIPROTEC 4 and SIPROTEC 5 line protection devices support a step-by-step transition from SIPROTEC 4 to SIPROTEC 5
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