Cropico ohmmeter enhances unit resistance testing
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Cropico product story
Edited by the Engineeringtalk editorial team
Jun 26, 2009
A supplier of power and distribution transformers is using the latest Cropico ohmmeter to improve the resistance testing of its units during the manufacturing process.
Wilson Power Solutions manufactures industrial transformers up to 60MVA for the UK and international utility market, producing upwards of 60 units per year.
These include amorphous metal core variants, package substations, battery chargers, switchgear and associated electrical equipment.
The company has replaced a single-channel tester with a Cropico D08000 ohmmeter to test for high resistance in the windings of its dual-channel transformers during production at its Leeds factory.
This has halved the time previously taken to test the transformers that it designs and builds each year, providing significant savings in time, cost and resources.
Simon Wilson, director at Wilson Power Solutions, said that the D08000 was chosen to replace the previous tester because it offered improved flexibility.
He said: 'The D08000 enables dual-channel testing, making it not only a cost-effective solution for us but also the most functional.' The versatile D08000 digital ohmmeter can measure and save more than 10,000 high-resolution test results, along with transformer nameplate data.
The D08000 features an expansive memory, a bright LCD screen and concise reports from its built-in printer.
It is capable of storing hundreds of files, each containing a virtually unlimited number of resistance measurements, with tap and winding details, and several fields of information about the transformer, its location and the operator.
The file manager makes this information easy to locate, open, view and print.
The instrument has a 4.5-digit resolution and 0.25 per cent accuracy for the precise measurement of winding resistance.
Input channels have sophisticated sigma-delta D/A converters and notch filters to eliminate the effects of substation noise.
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