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  1. rukmal

    CSP TRANSFORMER BREAKERS

    Can some one helpe to find Low voltage oil immersed curcuit breaker supplier. These breakers are used in completely self protected (CSP) pole mounted transformers. It would be a great help if you can recommand me some reliable manufacturer/Supplier
  2. rukmal

    EARTHING TRANSFORMERS

    I have come across a strange problem with earthing transformers(with zig-zag windings).It's a common practice that an auxiliary secondary winding is wound with an earthing transformer internally for auxiliary power supply for the sub station equipment. Recently we have came across that when...
  3. rukmal

    NO LOAD CURRENT

    To prc, Do you think in house annealing would solve the problem? At the moment we don't do in house annealing.Actually the guarenteed value was based on our design programme output which is based on on B-H curve supplied by our steel supplier.
  4. rukmal

    NO LOAD CURRENT

    We have designed a 100kVA 11kV/415V distribution transformer & in final testing it was identified that the no load current exceeds to specified limits that are laid under IEC 76.I would like to know the possible causes for such a obersvation * Can it be the air gap deviations? * Can it be the...
  5. rukmal

    K factor Transformers

    I need to source some information about K factor transformers & can some one help me in finding the info . regarding * What is the basic principle of K factor transformers * Winding techniques used in k factor transformers * Core arrangements Is there a way to get some research publications...
  6. rukmal

    Instrument Transformer

    Can some one help me in finding a method in calculating the core size of a 50w EI type instrument transformer. The relavent standard is IEC 61558.
  7. rukmal

    Transformer Heating

    Dear BJC, can you pls. send me the diagram. Its difficult to find the book here. My email is rukmalj@yahoo.com
  8. rukmal

    Transformer Heating

    Can some one suggest me a method og heating a 10MVA/ 33/415V transformer winding on site. The transformer was manufactured in 1971 & it needs oil filtering also as it is noe been used for last two years. Is it advisable to filter as winding insulations will remove in flakes(as it is old) when...

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