Siemens Siprotec 5 7SL86 Line Differential & Distance Protection Relay

The combined line differential and distance protection Siemens 7SL86 Protection Relay is part of the advanced SIPROTEC 5 Protection Relay Series, which offers modular, flexible, and intelligent digital field devices. Moreover, this relay is designed to meet the protection needs of modern electrical networks. Additionally, with its modularity and flexibility, the SIPROTEC 7SL86 easily adapts to various system configurations.

Furthermore, when used with the high-performance DIGSI 5 Engineering Tool, the SIPROTEC 7SL86 fits perfectly for protection, control, monitoring, and measuring applications in electrical energy systems. Therefore, it helps improve operational efficiency and system reliability.

Main Function:

• Differential and distance protection provide accurate fault detection and protection for transmission lines.

Tripping:

• Additionally, the relay supports 3-pole tripping.

• Moreover, it offers a minimum tripping time of 9 ms. As a result, faults can be cleared quickly to maintain system stability.

Inputs and Outputs:

• Furthermore, the relay provides 12 predefined standard variants with 4/4 or 8/8 current and voltage transformers.

• Additionally, it supports 5 to 31 binary inputs.

• Also, it includes 8 to 46 binary outputs for flexible system integration.

Hardware Flexibility:

• In addition, the device features a flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular system.

• Finally, the width of the housing ranges from 1/3 × 19” to 2/1 × 19”, allowing convenient installation in different control panel configurations.

All functions can be configured freely with DIGSI 5. For the application of some of the functions, you require the appropriate number of free function points within the device. The function point calculator in the online configurator provides support in determining the required number of function points for your device.

Functions

• Minimum tripping time of 9 ms ensures rapid fault isolation and system protection.

• Adaptive differential protection provides high sensitivity and stability, even during transformer faults, CT saturation, or capacitive charging currents.

• Supports distance protection functions such as classic distance protection, reactance method (RMD), and impedance protection for transformers.

• Includes directional backup protection with additional protection features.

• Provides adaptive power-swing blocking and out-of-step protection to maintain system stability.

• Detects ground faults in isolated or arc-suppression coil grounded systems using methods such as 3I0>, V0>, harmonic, Cos/Sin Phi, and admittance detection.

• Supports pulse location methods for accurate ground-fault identification.

• Detects current-transformer saturation for fast and precise tripping.

• Includes arc protection to enhance equipment and operational safety.

• Supports reactive power undervoltage protection (QU protection).

• Measures current and voltage signals up to the 50th harmonic for accurate monitoring and protection functions.

• Provides 3-pole automatic reclosing for quick restoration after temporary faults.

• Includes control functions, synchrocheck, and switchgear interlocking protection.

• Features a graphical logic editor for creating advanced automation functions in the device.

• Displays single-line diagrams on small or large integrated screens for easier monitoring.

• Offers integrated Ethernet RJ45 ports for DIGSI 5 engineering and IEC 61850 communication with reporting and GOOSE messaging.

• Supports up to four optional pluggable communication modules for IEC 61850, IEC 60870-5-103/104, Modbus TCP, DNP3, and PROFINET IO protocols.

• Enables secure serial protection communication through optical fiber, two-wire connections, and communication networks such as SDH and MPLS.

• Ensures reliable communication through PRP and HSR redundancy protocols.

• Provides advanced cybersecurity features aligned with NERC CIP and BDWE recommendations.

• Functions as a Phasor Measurement Unit (PMU) using the IEEE C37.118 protocol.

• Supports precise time synchronization through IEEE 1588.

• Includes powerful fault recording up to 80 seconds at 8 kHz or 320 seconds at 2 kHz.

• Offers flexible I/O configuration within the modular SIPROTEC 5 system.

Siemens 7SL86 Protection Relay

SIPROTEC 5 is part of the new generation of incomparable modular, flexible, and intelligent digital field devices. With modularly designed hardware and software and its high-performance DIGSI 5 engineering tool, the SIPROTEC 5 product family of field devices is perfect for protection, control, monitoring, and measuring applications in electrical energy systems. SIPROTEC 5 offers a wide product range with modular elements for every application and requirement.