Transformers oil-tight hermetic capacity up to 3150 kVA voltage class up to 35 kV climatic version UHL, category of placement 1, voltage winding HV - 10 (6) kV, winding LV - 0,4 kV, scheme and winding connection group D/Yn-11, Y/Yn-0, Y/Yn/Y-0, Y/Yn/Y-0, Y/Yn/Yn-0, Y/D-11, Y/Yn/D-11, D/D-0, Y/Zn-11 are designed for transmission and distribution of electric power of alternating current with frequency 50 Hz in power grids with voltage up to 10 kV inclusive.The following reliability indicators should be set for the transformers:- set MTBF - not less than 25000 h;- full service life - not less than 30 years.Other properties of functional value are prescribed in TU 3411-001-72210708-2004.
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