Technical library

Ratio and polarity test is made to confirm the marking on the CT (primary and secondary) and to verify it is matching with the drawing.

Ratio and polarity test is made to confirm the marking on the CT(primary and secondary) and to verify it is matching with the drawing.

To use ODEN and INGVAR in the best possible way is to determine a suitable current cable for the actual application

Primary injection testing of low voltage (LV) circuit breakers (CB) with primary test equipment ODEN and INGVAR

Software download files for PowerDB

MTR105 Firmware Update File

This application note explains Security Factor (FS) and Accuracy Limit Factor (ALF), what compensated FS and ALF mean, and how it is implemented in the TRAX software. To assist in the explanation of compensated FS and ALF, the basic operation principle of a current transformer will be described.

Software download files for SMRT

The fault current is set to 80mA tosimulatethe high current generated at the intermittent earth fault. The zero voltage is set to 20V;theconfiguration ismade in13 states.The fault states and the first two memory states are set to 20ms. The memory states havetimesselected togetthetrip as close to set time 1,2s as possible. In generator configuration,set U4gen to aux voltage DC.Set “Advanced mode” in SVERKER configuration.

Megger has partnered with several rail customers for many decades in developing and supplying test instrumentation to suit Rail applications. We continue to grow our product portfolio to compliment the rail industry and have recently added the Balto product testing range (page 9) to increase our HV breaker testing capabilities. Whether it’s specific test applications such as transformer testing, cable fault finding or more widely used general electrical test instruments, Megger is available to support you with your testing needs.