Bibliotek

 Self-powered relays will be animportant component for the protection of the smart grid.While they allow reducingthe cost of the protection system, they are definitely a challenge for relay test sets, that are required to provide the voltage and current signals to simulate the power system fault, but also the generatedsignals need to have necessary electric power to supply the protection relay.SVERKER 900 is designed to manage this task and this Technical Guide describes how two self-powered relays can be tested.This document guides through the testing of two self-powered overcurrent relaysfrom SEG GmbH (formerly Woodward), WIC-1 and WIP-1, with the relay test set SVERKER 900, for commissioning/maintenance purposes.The Technical Guide details on the principles adopted in the testing with reference to relevant IEC standards and to the relay manuals. In addition,basic instructions on the correct usage of the testing possibilities offered by SVERKER 900are described

Guide to Low Voltage Motor Testing

Det är många som utför elunderhåll som är obekanta med att göra diagnostisk isolaltionsresistansmätning vid spänningar över 1 kV. I den här omfattande guiden lär vi bland annat ut:#Hur du ska utföra diagnostiska isolationsresistansmätningar Rekommendationer för utvärdering och tolkning av resultaten#Fördelarna med flerspänningstestning vid större resistanser#I sluteta av guiden finns flera bilagor som innehåller ytterligare information om diagnostiska isolationsresistansmätningar. 

Gain insight into the different types of oil testing methods, including oil dielectric breakdown testing moisture content testing. This guide covers best practices for oil testing, the correct equipment to use, and the different IEEE/IEC standards to adhere to when testing.

This guide covers the role and function of circuit breakers in a power network, as well as the main types of breaker and prevailing CB technologies. Learn more about failure modes, maintenance strategies and testing methods.

Earth testing and resistivity measuring requires sensitive equipment and sophisticated calculations. This guide makes these processes easier to understand for both large and small ground systems, with detailed studies of various relevant testing methods.

This booklet focuses on the clamp-on method of ground testing and is designed to give the reader a better understanding of the test method and where it can and cannot be used.

this pocket guide we have endeavoured to cover the details of the 4th Edition - rather than clarify the changes – in an easy-to-read manner.

This guide covers the processes for low resistance testing, as well the optimal equipment to use, safety concerns and how to interpret results.

A complete guide to electrical insulation testing