Siemens Siprotec 5 7SJ86 Overcurrent & Feeder Protection Relay

The feeder and overcurrent protection SIPROTEC 7SJ86 is part of the new SIPROTEC 5 series of modular, flexible, and intelligent digital field devices. Moreover, with its modularity and flexibility and its high-performance DIGSI 5 engineering tool, the SIPROTEC 7SJ86 fits perfectly for protection, control, monitoring, and measuring applications in electrical energy systems and for reserve or emergency protection for the line protection devices.

Main function:

Overcurrent protection

Tripping: 3-pole inputs and outputs:-3 predefined standard variants with 4/4-current/voltage transformers,-11 to 23 binary inputs,-9 to 25 binary outputs. Hardware flexibility: Flexibly adjustable and expandable I/O quantity structure within the scope of the SIPROTEC 5 modular systemHousing width:1/3 x 19” to 2/1 x 19”

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

Other functions:

• Overcurrent protection as backup/emergency line protection for all voltage levels with 3-pole tripping
• Optimized tripping times due to directional comparison and protection data communication
• Detection of ground faults of any type in isolated or arc-suppression-coil-ground systems using the following functions: 3I0>, V0>, fleeting contact, Cos-/SinPhi, harmonic, dir. detection of intermittent ground faults and admittance
• Ground fault detection using the pulse location method
• Arc protection
• Automatic frequency relief for load shedding in case of underfrequency, taking account of changes in infeed conditions due to decentralized power generation
• Overvoltage and undervoltage protection
• Frequency protection and frequency change protection for load shedding applications
• Power protection, configurable as active or reactive power protection
• Protection functions for capacitor banks, such as overcurrent, overload, current unbalance, peak overvoltage, or differential protection
• Reactive power-undervoltage protection (QU protection)
• Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions.
• Control, synchrocheck, and switchgear interlocking protection
• Circuit-breaker reignition monitoring
• A graphical logic editor to create powerful automation functions in the device
• Single line representation in a small or large display
• Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
• 4 optional pluggable communication modules, usable for different and redundant protocols (IEC 61850, IEC 60870-5-103, IEC 60870-5-104, Modbus TCP, DNP3 serial and TCP, PROFINET IO)
• Redundancy protocols PRP and HSR
• Cyber security to NERC CIP and BDWE Whitepaper requirements
• Phasor Measurement Unit (PMU) for synchrophasor measured values and IEEE C37.118 protocol
• Time synchronization using IEEE 1588
• Powerful fault recording (buffer for a max. record time of 80 sec. at 8 kHz or 320 sec. at 2 kHz)
• Auxiliary functions for easy tests and commissioning
• Flexibly adjustable I/O quantity structure within the scope of the SIPROTEC 5 modular system

SIPROTEC 7SJ86

SIPROTEC 5 is part of the new generation of incomparable modular, flexible, and intelligent digital field devices. Additionally, 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.