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IEC

IEC 60076-11:2018/ISH1:2020

(Main)

Interpretation sheet 1 - Power transformers - Part 11: Dry-type transformers

Interpretation sheet 1 - Power transformers - Part 11: Dry-type transformers

General Information

Status
Published
Publication Date
09-Jul-2020
ICS
29.180 - Transformers. Reactors
Technical Committee
TC 14 - Power transformers
Drafting Committee
MT 60076-11 - TC 14/MT 60076-11
Current Stage
PPUB - Publication issued
Start Date
24-Jul-2020
Completion Date
10-Jul-2020
Ref Project

Relations

Revises
IEC 60076-11:2018 - Power transformers - Part 11: Dry-type transformers
Effective Date
05-Sep-2023

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IEC 60076-11:2018/ISH1:2020 - Interpretation sheet 1 - Power transformers - Part 11: Dry-type transformers Released:7/10/2020IEC 60076-11:2018/ISH1:2020 - Interpretation sheet 1 - Power transformers - Part 11: Dry-type transformers Released:7/10/2020
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IEC 60076-11:2018/ISH1:2020 - Interpretation sheet 1 - Power transformers - Part 11: Dry-type transformers Released:7/10/2020
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Standards Content (Sample)


© IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 60076-11
Edition 2.0  2018-08
POWER TRANSFORMERS –
Part 11: Dry-type transformers

INTERPRETATION SHEET 1
This interpretation sheet has been prepared by IEC technical committee 14: Power
transformers.
The text of this interpretation sheet is based on the following documents:
DISH Report on voting
14/1052/DISH 14/1054/RVDISH
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.

___________
14.3.2 Temperature-rise test
Question
The independent certification body in Poland "Instytut Energetyki" carries out the testing of
transformers or its inspectors witness this testing at the manufacturers' premises. The
description of resistance measurement during the temperature rise test has caused a dispute
between a manufacturer and the inspector on where exactly the resistance should be
measured. The inspector requested that the resistance be measured on "winding lead exits"
inside the enclosure, while the manufacturer argued for the measurement to be made on
"winding terminals" which in its opinion were the bushings on the enclosure cover.
ICS 29.180
IEC 60076-11:2018-08/ISH1:2020-07(en)

– 2 – IEC 60076-11:2018/ISH1:2020
© IEC 2020
Subclause 14.3.2.1 General, states:
The winding temperature rise shall be established by the rise in resistance method or
by superposition method. For the determination of the average winding temperature
rise the measured temperatures of the cooling air or of the water intake of the cooling
equipment shall be used.
For three-phase transformers, the resistance measurements
...

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