Siemens Siprotec 5 7SK85 Motor & Generator Protection Relays

The motor protection device,  SIPROTEC 7SK85 Motor & Generator Protection relay is part of the SIPROTEC 5 series of modular field devices. This device is designed for the protection of all motor sizes. With its flexibility and its high-performance DIGSI 5 engineering tool, the SIPROTEC 7SK85 fits perfectly for protection, control, monitoring, and measuring applications in electrical energy systems.Main function:Motor protection for all motor sizesTripping:3-poleInputs and outputs:-3 predefined standard variants with 4 current-transformers, 4 voltage transformers,-11 to 27 binary inputs, 9 to 17 binary outputsHardware flexibility:Flexibly adaptable and expandable I/O quantity structure within the scope of the modular SIPROTEC 5 building block, 1/6 expansion modules can be added. Available with large or small display or without displayWidth of housing:1/3 x 19” to 2/1 x 19”

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.

FURTHER FUNCTIONS

• Motor protection functions: Startup time monitoring, thermal overload protection for stator and rotor, restart inhibit, unbalanced-load protection, load-jam protection
• Stator and bearing temperature monitoring via temperature sensors with external RTD unit
• Differential motor protection as fast short-circuit protection for motors of high power
• Sensitive ground-fault protection (directional, non-directional) to detect stator ground faults
• Directional and non-directional overcurrent protection (short-circuit protection) with additional functions
• Detection of ground faults of any type in isolated or arc-suppression-coil-ground power 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
• Overvoltage and undervoltage protection
• Arc protection
• Power protection, configurable as active or reactive power protection
• Detection of current and voltage signals up to the 50th harmonic with high accuracy for selected protection functions (such as thermal overload protection) and operational measured values
• Control, synchrocheck and switchgear interlocking protection
• Graphical logic editor to create powerful automation functions in the device
• Integrated electrical Ethernet RJ45 for DIGSI 5 and IEC 61850 (reporting and GOOSE)
• Up to 4 pluggable communication modules, usable for different and redundant protocols (IEC 61850, IEC 60870-5-103, IEC 60870-5-104, DNP3 serial and TCP, Modbus TCP, PROFINET IO)
• Redundancy protocols PRP and HSR
• Cyber security to NERC CIP and BDWE Whitepaper requirements
• Secure serial protection data communication, even over great distances and all available physical media (optical fiber cable, 2-wire connections and communication Networks)
• Capturing operational measured variables and protection function measured values to evaluate the plant state, to support commissioning, and to analyze faults
• Phasor Measurement Unit (PMU) for synchrophasor-measured values and IEEE C37.118 protocol
• 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 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 are 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.