7SR18 line differential protection relay

Complete type testing according to IEC 60255-1

Contact us:

Marc Achterkamp Marc Achterkamp
Head of Section testing Metering, Protection & Substation Automation equipment
Line differential protection relay

Siemens Protection Devices Ltd, United Kingdom

Is a full subsidiary of Siemens. Siemens is a global powerhouse positioned along the electrification value chain – from power generation, transmission and distribution to smart grid solutions and the efficient application of electrical energy – as well as in the areas of medical imaging and laboratory diagnostics.


A 7SR18 line differential protection relay. The differential protection relay is a numeric three phase differential protection relay used to detect in zone phase and earth faults. This differential protection relay is applied to overhead line and underground cable circuits as well as shorter circuits such as interconnectors.Siemens-7SR18-LDPR-250x188pxl

Complete type testing according to IEC 60255-1. The test programme included both functional performance and hardware/environmental tests.

A special feature for the test programme was that the customer sent samples from two different manufacturing locations.

KEMA Type Test Certificate of Complete Type Tests

KEMA Metering, Protection and Substation Automation (MPSA) Laboratory, Arnhem, the Netherlands