Technical library

Since there is no such thing as perfect insulation, if any conductor is raised to a potential above that of earth some current is bound to flow to earth from that conductor. The amount of current that flows is dependent on:Voltage on the conductorThe capacitive reactance between the conductor and earthResistance between conductor and earthCurrents that flow to earth are called leakage currents and are usually very small values, typically < 1 mA. However the amount of current that is required to cause distress or harm to a human being or animal is also small, these currents must be limited by circuit design to safe values.If this is not possible, then a 30 mA RCD (residual current device) or 30 mA RCBO (residual current device with overload protection) should be fitted for personal protection.

Since the invention of the transformer, the design, quality and efficiency of this magnificent machine has been improved thanks to the development of electromagnetic materials, computer design algorithms, insulation materials, cooling systems, structural design, etc. Nowadays, a vast number of transformers operate worldwide aiming to provide reliable and safe operation under the most cumbersome environmental and operational conditions.

Current inrush testing is a common test that can be performed on transformers, motors and other equipment. This document shall describe how to configure the MPQ Analyzer to perform an inrush test. The MPQ Analyzer can record the voltage, current, active power, reactive power, apparent power, power factor and energy for every cycle for every active channel/phase, before and after the inrush. The MPQ Analyzer will also capture the inrush waveform for up to 10 seconds on each active channel.

Insulation resistance measurement is one of the most widely used tests for power assets but, to achieve dependable results, it’s universally accepted that it’s essential to use a test set with a guard terminal. We look at why this is and examine the frequently neglected issue of guard terminal performance.

The new MFT1845 utilises a brand new loop impedance test technique which provides immunity to the increased impedance effects that RCDs and RCBOs can have on the measurement. Read more about it ...

Use where electrical noise affects the repeatability of measured values to the extent where it is difficult or impossible to get a reliable loop impedance value, or where a significant number of repeated measurements are required to provide a reasonable average.

Software download files for EasyProt

SVERKER Win Software For SVERKER 750/780

Download the latest LVI and GET catalogue of 36 pages, which details all Megger products designed for contractors working on low voltage systems.

BVM150The system consist of 16 BVM units. Power & Signal Connector. Power supply.16pcs. Ethernet cables 0,5m. Ethernet cable 2m. USB extension cable 2m. 16 pcs. Dolphin clips(15 pcs. Black, 1 pcs. red). Art no CJ-59092. 16 pcs. extension cable, Art no 04-30050.BVM300The system consist of 31 BVM units. Power & Signal Connector. Power supply. 31pcs. Ethernet cables 0,5m. Ethernet cable 2m. and 3m. USB extension cable 2m. 31 pcs. Dolphin clips (30 pcs. black, 1 pcs. red). Art no CJ-59093. 31 pcs. extension cable, Art no 04-30050.BVM600The system consist of 61 BVM units. 1pcs. Power & Signal Connector. Power supply. 61pcs. Ethernet cables 0,5m. Ethernet cable 2pcs. 2m and 2pcs. 3m. USB extension cable 2m. 61 pcs. Dolphin clips (60 pcs. black, 1 pcs. red). 2pcs. Art no CJ-59096. 61 pcs. extension cable, Art no 04-30050.BVM special 600VThe system consist of 46 BVM units. 2pcs. Power & Signal Connector. 2pcs. ungrounded power supply. 46 pcs. Ethernet cables 0,5m. 2pcs. USB extension cable. 2pcs. Opto coupler. Dolphin clips (44 pcs. black, 2 pcs. red). Art no CJ-59198. 46 pcs. extension cable, Art no 04-30050.