New instrument revolutionizes Power Transformer Diagnostics.

M2 PRESSWIRE-10 November 2000-Programma Electric: New instrument revolutionizes Power Transformer Diagnostics (C)1994-2000 M2 COMMUNICATIONS LTD

RDATE:09112000

For more than 60 years, measurement of capacitance (C) and the dissipation factor at a fixed frequency has been a major part of the diagnostics of power transformer insulation. A new product, IDA 200 Insulation Diagnostic System, performs these same measurements over a wide frequency range. This new approach, using variable frequency, dramatically reduces the size and weight of the equipment. Also, accuracy is improved and interpretation of measurement results made easier. These and other features of IDA200 help extend average service life and reduce maintenance costs for transformers in electrical power systems.

IDA 200 measures insulation by applying a sinusoidal voltage in a selectable frequency range from 1000 Hz down to 0.1 mHz, while simultaneously measuring the current. The capacitance (C) and the dielectric loss (tan-delta / power factor) of the device being diagnosed are calculated and presented both numerically and graphically on the instrument's computer screen. By employing this method, several advantages follow. As an example, relatively low voltages (up to 200 V) are used, eliminating the heavy and bulky instruments often associated with dielectric loss measurements. Also, the problem of corrupted measurements which often is caused by mains frequency interference from adjacent HV lines in the substation is minimized.

The product uses Windows-based internal software, weighs approximately 15 kg (33 lbs) and generates test voltages up to 200 V. In addition to reading test results directly on the unit's display, there will be an optional service available whereby users can connect to an expert website on the Internet. An in-depth analysis of the results is done and, in effect, a "flag" is raised for all measurement results outside the expected.

Apart from Power Transformer Diagnostics, the IDA 200 is suitable for diagnostics on instrument transformers, bushings and paper insulated cables as well.

Facts about Programma Electric:

Programma Electric, founded in 1976, manufactures, develops and markets measuring instruments for high-voltage applications. Programma Electric's manufacturing is certified in compliance with ISO 9001 quality standards and its products are developed and designed to meet IEC and other international norms and safety standards. The company is globally active and represented in more than 70 countries around the world.

CONTACT: Programma Electric Ltd Tel: +44 (0)1865 391 600 Fax: +44 (0)1865 392 100 e-mail: public@programma.co.uk WWW: http://www.programma.co.uk

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