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  • Transformer Oil Life

    Posted Thu at 9:25 AM by David Welson


          A transformer is normally rated to operate continuously at a maximum temperature based on an assumed ambient. No sustained overload is usually permissible for this condition. At lower ambient it Read More...

  • Limitation of transformer overloading

    Posted Jan 18 by Reynaldo Danilo

    1 Comment 1 Like 487 Views

      Transformer Overloading and Limitations In the power systems, transformers could also be occasionally loaded above their name plate ratings during a response to emergency or contingency conditions. The over Read More...

  • Power transformer classes

    Posted December 27, 2019 by Reynaldo Danilo


        In power system applications, the single- or three-phase transformers with ratings up to 500 kVA and 34.5 kV are defined as distribution transformers, whereas those transformers with ratings over 500 kV Read More...

  • Transformers in parallel

    Posted December 26, 2019 by David Welson


    For supplying a load in excess of the rating of an existing transformer, two or more transformers may be connected in parallel with the existing transformer. It is usually economical to install another transformer in p Read More...

  • Tappings and Tapchangers of a Transformer

    Posted December 24, 2019 by Reynaldo Danilo

    1 Like 1,469 Views

    Almost all transformers incorporate some means of adjusting their voltage ratio by means of the addition or removal of tapping turns. This adjustment may be made on-load, as is the case for many large transformers, by Read More...

  • Different connections of windings in transformers

    Posted November 29, 2019 by Zone4 Engineer


    In general, building distribution transformers are star- connected on the low voltage side to eliminate circulating triplen harmonics (3rd, 9th, 15th etc.) in a delta-connected three-phase winding. The high voltage sid Read More...

  • Comparison between AC and DC UPS

    Posted May 5, 2019 by Zone4 Engineer


    What are the main types of UPS? UPSs come in three major varieties, which are also known as topologies: Single-conversion systems In normal operation, these feed incoming utility AC power to IT equipment. If the AC Read More...