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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 (mega volt ampere) 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 it designs and builds each year, providing savings in time, cost and resources.

Simon Wilson, director at Wilson Power Solutions said the D08000 was chosen to replace the previous tester because it offered improved flexibility.

The D08000 digital ohmmeter can measure and save more than 10,000 high-resolution test results, along with transformer nameplate data.

It has an expansive memory, bright LCD screen, and provides 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 past results.

The instrument has a 4.5 digit resolution and 0.25 per cent accuracy for precise measurement of winding resistance.

Input channels have sigma-delta D/A converters and notch filters to eliminate the effects of substation noise.

Cropico manufactures a range of specialist instrumentation designed for a wide variety of precision measurement applications.

Resistance measurement – Cropico’s comprehensive range of digital milliohmmeters is designed for the highly accurate precision measurement of low resistance values in a wide variety of electrical, electronic, industrial and engineering applications. The ohmmeter range includes microhmmeters, milliohmmeters, digital and portable ohmmeters.

Temperature measurement – Cropico also supplies a range of highly accurate digital thermometers and thermocouples with PT25 / PT 100 sensor for use in calibration laboratories as well as in applications associated with the aerospace and pharmaceutical, petrochemical and other process industry sectors.

Decade Boxes and Resistance standards – for precision measurement applications and the calibration of laboratory or workplace equipment.

Cable clamps and testers – Cropico also supplies a range of cable and harness testers.

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