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One very important component of a power transformer is the on-load tap changer (OLTC). The principal of the Dynamic Resistance Measurement (DRM) was developed to analyse the switching process of OLTCs.

The latest software version 3.40 of the CPC 100 Toolset and Primary Test ManagerTM (PTM) includes the new OLTC scan function, which allows DRM to be performed with the CPC 100 + CP SB1 test system.

The new OLTC scan can be performed as a supplementary measurement in order to analyse the OLTC’s switching process. DC current is injected in the same way as in static winding resistance measurement with the addition of recording the dynamic behaviour of the diverter switch. Based on this non-invasive testing method, failures can be detected without opening the OLTC compartment. As a result, the reliability of the OLTC can be improved, maintenance costs can be reduced and most importantly, unexpected and expensive outages can be avoided.

With the integration of the OLTC scan functionality, the multifunctional CPC 100 + CP SB1 test system now allows comprehensive tap changer diagnosis on all phases.

Beside the testing possibilities, the Primary Test Manager (PTM) software makes it possible to analyse and compare the switching process of the individual taps and phases using unique filtering options. As a result additional parameters of the switching process can be extracted for a more comprehensive analysis of the OLTC condition.

Customers can download the latest software version 3.40 of the CPC 100 Toolset and Primary Test Manager free-of-charge from the customer area of the Omicron website.

OMICRON electronics UK

OMICRON is an international company serving the electrical power industry with innovative testing and diagnostic solutions.

OMICRON is an international company serving the electrical power industry with innovative testing and diagnostic solutions.

The application of OMICRON products provides users with the highest level of confidence in the condition assessment of primary and secondary equipment on their systems. Services offered in the area of consulting, commissioning, testing, diagnosis, and training make the product range complete.

Customers in more than 140 countries rely on the company’s ability to supply leading-edge technology of excellent quality. Broad application knowledge and extraordinary customer support provided by offices in North America, Europe, south and east Asia and the Middle East, together with a worldwide network of distributors and representatives, make the company a market leader in its sector.

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