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Results
By performing a dynamic resistance measurement (drm) you will
see the contact resistance variations. This gives you indications on the contact
fingers, lubrication and SF6 contamination. The most common use however is to measure the
length of the arcing contact without taking the breaker pole apart. To get the
arcing contact lenght, a travel transducer must also be
attached.
Another common use is to take a reference graph of the resistance
curve either at type testing of the breaker and then compare it at circuit breaker
production routine testing procedures. In field service you compare against the
values taken in the factory or during comissioning of the circuit breaker. The
comparison routines gives any user a swift and easy way of analysing the circuit
breaker main contact.
The Equipment
The
SA10 and
BTS2000 has built in current
generators (200A DC) for static and dynamic resistance measurements.
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