Siemens 7SK80 User Manual

SIPROTEC
Motor Protection
7SK80
V4.7
Manual
E50417-G1140-C344-A5
Preface
Contents
Introduction 1
Functions 2
Mounting and Commissioning 3
Technical Data 4
Appendix A
Literature
Glossary
Index

Siemens 7SK80 Specifications

General

Frequency	50/60 Hz
Rated Voltage	24 to 250 V DC, 100 to 230 V AC
Communication Protocols	IEC 61850, Modbus, DNP3
Protection Functions	Overcurrent, Earth Fault, Over/Under Voltage, Frequency Protection
Housing	19-inch rack

Summary

Functions

General

Overcurrent Protection 50, 51, 50N, 51N

Details definite and inverse time overcurrent protection elements, including pickup and delay settings.

Ground Fault Protection 64, 67N(s), 50N(s), 51N(s)

Covers ground fault detection principles, current elements, and directional characteristics for various systems.

Intermittent Ground Fault Protection

Mounting and Commissioning

Mounting and Connections

General information on device installation, including terminal assignments and transformer connections.

Checking Connections

Commissioning

Procedures for testing and configuring the device after installation, including test modes.

Technical Data

General Device Data

Definite-time Overcurrent Protection

Details setting ranges, increments, and tolerances for definite-time overcurrent protection elements.

Inverse-time Overcurrent Protection

Explains inverse-time characteristics, dropout times, and tolerances for overcurrent protection.

Ground Fault Detection (Sensitive/Insensitive)

Appendix

Ordering Information and Accessories

Terminal Assignments

Connection Examples