News & knowledge

In this application note, DV Power explains how to perform motor winding resistance test.

With DV Power CAT Standard Series of circuit breaker analyzers & timers, you can create your test plan and use it later on a test site.

This research article issued by DV Power shows some field experiences with internal resistance tests and capacity testing. In addition, it provides a comparison between these two tests. The conclusion discusses some merits and short comings of each test.

This application note summarizes the explanation of important parameters in turns ratio testing: transformer turns ratio, turns ratio deviation, excitation current and phase angle.

This Note describes one alternative method for a circuit breaker operating condition estimate. By providing and analyzing the actuating coil current wave form during opening or closing operation, one can get an insight in the CB operational status. [1] Standard IEC-62271-100 suggests the actuating coil current waveform should be recorded during a test and attached to the test report.