SIPROTEC 7SK82 Motor Protection


Catalog excerpts

SIPROTEC 7SK82 Motor Protection - 1

Description The SIPROTEC 7SK82 motor protection has been designed specifically for a cost-optimized and compact utilization of smallsized to medium-sized motors. With its flexibility and the highperformance DIGSI 5 engineering tool, SIPROTEC 7SK82 offers future-oriented solutions for protection, control, automation, monitoring, and Power Quality - Basic. For motors in explosive environments, the SIPROTEC 7SK82 is also available with EN 60079-14 or VDE (Verband der Elektrotechnik, Elektronik und Informationstechnik) 0165, Part 1 (ATEX) certification. Main function Motor protection for small to medium-sized motors (100 kW to 2 MW) Inputs and out- 4 current transformers, 4 voltage transformers puts (optional), 11 or 23 binary inputs, 9 or 16 binary outputs Hardware flexi- Different hardware quantity structures for bility binary inputs and outputs are available in the 1/3 base module. Adding 1/6 expansion modules is not possible; available with large or small display Housing width 1/3 x 19 inches Applications • Protection against thermal overload of the stator from overcurrent, cooling problems or pollution • Protection against thermal overload of the rotor during startup due to frequent startups, excessively long startups or blocked rotor • Monitoring for voltage unbalance or phase outage • Monitoring the thermal state and the bearing temperatures with temperature measurement • Detection of idling drives of pumps and compressors, for example • Detection of ground faults in the motor SIPROTEC 7SK82 Motor Protection • Protection against motor short circuits • Protection against instability due to undervoltage • Detection and recording of power quality data in the medium voltage and subordinate low voltage power system Functions DIGSI 5 permits all functions to be configured and combined as required. • 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 optional temperature inputs or with external RTD unit. • Sensitive ground-fault protection (non-directional, directional) to detect stator ground faults • Directional and non-directional overcurrent protection (shortcircuit protection) with additional functions • Detection of ground faults of any type in compensated or isolated electrical power systems using the following functions: 3I0>, V0>, transient ground fault, cos 0, sin 0 , dir. detection of intermittent ground faults, harmonic detection, and admittance measuremen

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SIPROTEC 7SK82 Motor Protection - 2

Ground-fault detection using the pulse-detection 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 PQ - Basic: Voltage unbalance; voltage changes: overvoltage, dip, interruptions; TDD, THD, and harmonics Control, synchrocheck, and switchgear interlocking protection Graphical logic editor to create high-performance automation...

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