Information about Maintenance Work


The inspection and maintenance of tap-changers are limited to the following components:


  • Diverter switch
  • Motor drive
  • Driving shafts



The selector switch (and change-over selector) which is installed in the transformer tank does not require any maintenance over the whole lifetime of the transformer. Only in few cases where the number of operations is very high (1 - 1.5 million operations) the necessity for overhaul work can exist. In order to ensure a high reliability of operation it is recommended to make inspections of the diverter switches regularly. The number of operations after which an inspection is to be executed depends on the transformer service current and the type of on-load tap changer. The exact number of operations is indicated in the technical instruction which you have received with the supply of the transformer. If you have any question - don't hesitate to contact us!



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