Siemens SIPROTEC 5 7SL86 Distance Protection Relay
The Siemens SIPROTEC 7SL86 Distance Protection Relay is part of the advanced SIPROTEC 5 family, offering a comprehensive solution for line differential and distance protection in medium- and high-voltage power networks. Built with Siemens’ proven reliability, this relay ensures fast, selective, and secure fault detection—minimizing downtime and protecting valuable assets.
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With its 4xI and 4xV measurement inputs, expandable hardware modules, and 3-pole fast tripping capability, the SIPROTEC 7SL86 provides flexible configuration options to adapt to a wide range of protection schemes. The relay supports communication protocols for IEC 61850 and modern digital substations, ensuring seamless integration into existing and future grid infrastructures.
Designed for transmission lines, substations, and industrial networks, the SIPROTEC 7SL86 Relay delivers:
- High-speed fault detection & clearance to improve system stability.
- Line differential and distance protection for two-terminal and multi-terminal lines.
- Expandable hardware flexibility for customized applications.
- Advanced monitoring, control, and communication features for digital grids.
Main function:
- Differential and Distance Protection
Tripping:
- 3-pole, minimum tripping time: 9 ms
Inputs and outputs:
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- 12 predefined standard variants with 4/4 or 8/8 current transformers/voltage transformers, 5 to 31 binary in
puts, 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
Application
- Line protection for all voltage levels with 3-pole tripping</li>
- Phase-selective protection of overhead lines and cables with single-ended and multi-ended infeed of all len
- gths with up to 6 line ends
- 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
- Phasor Measurement Unit (PMU)
If you are based in Mumbai or nearby regions, we are a leading supplier and distributor of Siemens SIPROTEC relays. A trusted by utilities, EPC companies, and industrial clients.</span> With our strong local presence, we provide genuine products, expert technical support, and competitive pricing, ensuring you get the right protection relay for your project needs.
The SIPROTEC 7SL86 Distance Protection Relay is the perfect choice for organizations looking for future-ready, high-performance protection solutions that combine Siemens innovation with practical application in India’s growing power sector.
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