7SR18 Solkor Line Differential Relay is a line differential protection device used in power systems to protect lines. It can be used to protect transformers, generators, motors and other power equipment. The device uses advanced digital signal processing technology, has high reliability, high precision, low false alarm and other characteristics.
This document serves as a technical manual for the Siemens 7SR18 SolkorLine Differential Relay. It provides detailed descriptions of the relay's operation, hardware configuration, and installation procedures. The guide includes extensive information on protection functions such as differential protection, overcurrent protection, and earth fault protection, along with control and logic features.
| Auxiliary Supply Voltage | 24 V to 250 V DC |
|---|---|
| Voltage Dips (AC auxiliary supply) | 0 % RV 2.5/3 cycles |
| Voltage Interruptions (AC auxiliary supply) | 0 % RV 250/300 cycles |
| Alternating Component in DC (Ripple) | 15 % max |
The relay operates normally unless the dip falls below the minimum voltage, in which case it restarts.
The relay will not operate if the voltage is between 24 V and 250 V DC.