Technical library

A 44 page catalogue detailing the Megger products design for contractors working on low voltage systems

A complete guide to electrical insulation testing

Diagnostics on both MV and HV cables is used as part of commissioning tests to check the quality of workmanship of newly installed cables and accessories. This paper goes into detail to all available excitation voltages for offline PD diagnostics.

The continuously increasing installation complexity for medium voltage power cables, results in many weak spots and therewith cable failures due to bad workmanship. This is mainly caused by the large variety of cable accessories as well as the reduction in insulation thickness and therewith in the margin of error throughout the entire cable installation process. The necessity for both commissioning testing of new cables as well as diagnostic measurements as part of a condition based maintenance is just a logical given fact. Nowadays cable testing as well as condition monitoring are well proven measurement methods for MV power cables which are guided by IEEE 400 [1] and IEC 60502-2 [2] standards.

Different partial discharge defects show a different distribution in the frequency spectrum. These typical characteristics could be used in combination with the appropriate phase resolved partial discharge pattern for the analysis of partial discharge defects. The classification of the partial discharges allows an assessment of the defects in terms of its criticality.

The value of insulation resistance (IR) is strongly affected by the temperature of the material. However, in most cases IR measurements are done at the operating temperature of the given device. For this reason temperature correction is required to ensure that meaningful conclusions can be drawn from the measured values of IR

An application note that looks at testing insulating oil.

Download this installation package to load new MPQ software on your Computer.

Here you will find Firmware to be loaded into the MPQ1000 and MPQ2000 Analysers. The current update file MPQFirmwareUpdate20170224.zip contains the update, specific instructions for the MPQ1000 and specific instructions for the MPQ2000. Download the zip file and directly unzip it to a Clean Thumb drive. The update is less than 10 MB.

A catalogue, for quick reference, of the range of Megger test instruments for the maintenance of electrical power systems