Technical library

Test the breaker at first operation after a longer period of static position.Trip the circuit breaker from stationcontrol (Local or remote system). During operation coil currents are recorded by current clamps connected toTM1700 control part or TM1800 analog module. 3 phase timing are  recorded by current clamps in secondarycircuit station of current transformers (in the bay). The “timing” current clamps are connected to the analogchannels.

The CAT (Category) rating of a test instrument defines where in the electrical supply chain the instrument can besafely used. This is usually printed on the instrument across the test connections and appears as CAT II, CAT III orCAT IV. CAT I is generally no longer used, as it has no practical application.

Megger has been manufacturing low resistance ohm meters for many years. In fact the first Low resistanceohmmeter was launched in 1908. The first low resistance ohm meter, launched under the DUCTER trade markwas developed by Evershed and Vignoles (one of the companies that evolved into Megger) and used a cross-coils meter movement. Today, Megger has a comprehensive range of Digital Low Resistance Ohmmeters,under the DLRO trade mark, providing accurate and reliable measurements with test currents ranging from afew μA to 600 A suitable for many applications.

MTR105 Firmware Update File

High power test and diagnostics combination for medium voltage cables.

MJÖLNER Win software for MJÖLNER200/600

Software download files for Download Manager

Electric heat tracing systems are widely used inprocessindustriesand have applications in many other areas,as well. In general, these systems are used to maintain a preferred temperature. Applications include:keepingmaterials flowing at an ideal viscosity; preventing pipes from freezing,to help keep railroad tracks, roofs, gutters, antennas, etc.free from ice and snow; or to meet stricttemperature variance requirements in food, pharmaceutical, and cosmetic processing industries, to name just a few.

This article describes the application of DFR and HV DFR as a preventive method to evaluate the condition and prioritize maintenance activities on HV and EHV bushings and relates some case studies. 

To help protect you from serious injury the IEC has developed a system of safety categories (CAT) related to the design of your tester and the locations in which you work.  We can assist your certification and maintenance testing for predictive, diagnostic or routine purposes. By working closely with electrical contractors, both large and small, standards bodies and scheme providers, we contribute to the dependability and advancement of the electrical installation industry.