tap changers
tap changers
(OP)
I am interested to get some idea of the proportion of distribution transformers that have tap changers. How many are on load and how many are off load. Sim=ple percentages will do. Exclude pole tops.
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RE: tap changers
Two of the utilities had no tapchangers whatsoever... all regulation was done by stand-alone single-phase regulators.
Two fo the other utilities had tapchangers on most of their substation transformers (90%).
My understanding was this resulted from different preferences of the design engineers within those utilities.
RE: tap changers
RE: tap changers
RE: tap changers
General answer will be
On load tap changers are not provided in distribution trfs when the system voltage is relatively stable.But OLTC is provided when System voltage fluctuate a lot -that too quite often-due to poor strength of the system.In India,in certain regions I have seen distribution trfs with OLTC for trfs of rating as low as 500 KVA. In some cases OLTC size ,and cost may be as much as main trf!
RE: tap changers