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.

Expert recommends


When measuring DRM, CIBANO 500 outputs up to 200 A DC with very high accuracy with a digital μΩ meter.

Benefits of this solution



State-of-the-art circuit breaker testing MV / HV

High-voltage circuit breaker testing with OMICRON's CIBANO 500 and CB MC2

Testing circuit breakers with OMICRON's CIBANO 500

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