Dynamic Contact Resistance Measurement (DRM)

During dynamic contact resistance measurements, the contact resistance traces are recorded while the breaker operates. These traces deliver information about wear-related problems with the main and arcing contacts within the interrupter chamber.

When the contact movement is recorded simultaneously, the length of current carrying part of the arcing contacts can be measured. Arcing contacts commonly burn off and become shorter for each interruption of current.

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Benefits of this solution

All important tests on breakers

CIBANO 500 combines a micro-ohmmeter, timing analyzer, and a coil and motor supply. All important CB tests on all types of CBs can be carried out even when a station battery is not available.