BS 171-3:1987
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Power transformers Specification for insulation levels and dielectric tests
Hardcopy , PDF
15-07-2001
English
30-01-1987
Foreword
Committees responsible
Clause
1 Definitions
2 General
3 Highest voltage for equipment and insulation level
4 Rules for some special classes of transformers
5 Insulation requirements and dielectric tests - Basic
rules
6 Tests on a transformer having a tapped winding
7 Insulation requirements and test conditions for
dry-type transformers
8 Repeated dielectric tests
9 Insulation of auxiliary wiring
10 Separate-source voltage withstand test
11 Induced overvoltage withstand test
12 Lightning impulse test
13 Test with lightning impulse chopped on the tail
14 Switching impulse test
Appendix A Application guide for partial discharge
measurements during induced overvoltage
withstand test on transformers according
to Sub-clause 11.4
Appendix B Overvoltage transferred from the high-
voltage winding to a low-voltage winding
Appendix C Information on transformer insulation and
dielectric tests to be supplied with an
enquiry and with an order
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