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Testing and commissioning

Circuit Breaker Testing

Dynamic resistance measurements is a novel technique developed to determine wear on the primary contacts of circuit breakers. It is probably most valuable for the condition monitoring of SF6 insulated switchgear, where the cost of inspections is great due to gas recovery and management during the inspection. The test set injects a current of up to 200A through the and measures the voltage developed during breaker operation while measures the travel curve through rotary and linear transducers.