The highest allowable values of tgδ insulation of transformer windings in oil

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Annex 3.1. The highest allowable values of tgδ of transformer winding insulation in oil. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Rules for the technical operation of consumer electrical installations (PTE)

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Table 4

Transformers	10	20	30	40	50	60	70
35 kV over 10000 kVA and 110 kV of all capacities	1,8	2,5	3,5	5,0	7,0	10,0	14,0
220 kV all capacities	1,0	1,3	1,6	2,0	2,5	3,2	4,0

Note. The values given in the table refer to all windings of this transformer.

See other articles Section Rules for the technical operation of consumer electrical installations (PTE).

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