Circuit breaker or relay contacts, bus bars and switchgears constantly carry high currents. If the junctions deteriorate, the current carrying efficiency may be reduced and cause several problems like welding of contacts, localized Ohmic heating and eventual component failure.
One of the best methods of testing the current carrying efficiency of conductor junctions is by measuring the junction resistance.
For measuring very low contact resistance of sensitive devices, the Megger DLRO200-115, a Digital Low Resistance Ohmmeter, offers high quality and accurate test results.
Suitable for applications that demand precise, noise-free and smooth DC test current, the Megger DLRO200-115 Digital Low Resistance Ohmmeter has an extra filtering system that suppresses AC mains line ripple, helping to eliminate accidental tripping of a circuit breaker’s control caused by magnetic transients.
The DLRO200-115 can put out a test current 200 Amperes through a loop resistance of 11 mΩ. The output current is variable from 10 Amperes up to 200 Amperes, and allows for resistance measurements as low as 0.1 μΩ.
The 200-115 offers an internal memory capable of storing 300 test results and notes.
An Ingress Protection 54 and a unit weight of only 15kg makes the Megger DLRO200-115 Digital Low Resistance Ohmmeter suitable for production, field and workshop applications.
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