Siemens SIPROTEC 5 7SL87 Line Differential Protection Relay
The SIPROTEC 7SL87 Line Differential Protection Relay from Siemens is a cutting-edge solution for line differential and distance protection in transmission and distribution networks. Built on the powerful SIPROTEC 5 platform, this relay is designed to deliver reliable performance, fast tripping, and flexible integration for modern power systems.
Key Features & Benefits:
- Comprehensive Protection: Provides both line differential and distance protection in one device, reducing system complexity.
- High-Speed Fault Clearance: With 1-/3-pole fast tripping, it ensures quick fault isolation and improved system stability.
- Flexible Inputs: Equipped with 4xI/4xV inputs, supporting diverse applications and configurations.
- Expandable Hardware: Designed to scale with your system requirements, ensuring long-term usability and investment protection
- Enhanced Communication: Seamless integration with digital substations and SCADA systems for smarter grid management.
Proven Siemens Technology: Built with Siemens’ trusted engineering for accuracy, durability, and reliability.
Features
Main function:
- Differential and distance 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
Application
- Line protection for all voltage levels with 1-pole and 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
- Also used in switchgear with breaker-and-a-half layout
- 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
- Phasor Measurement Unit (PMU)
Availability in Mumbai:
Looking to buy the SIPROTEC 7SL87 Line Differential Protection Relay in Mumbai? We are trusted suppliers and distributors offering genuine Siemens protection relays at competitive prices. With local stock availability, authorized dealer support, and expert technical guidance, we ensure reliable delivery across Mumbai, Maharashtra, and pan-India.
Whether you are a utility provider, industrial operator, or EPC contractor, the SIPROTEC 5 7SL87 Distance & Line Differential Protection Relay is the right choice to safeguard your grid with maximum efficiency and reliability.
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