IEC/IEEE 65700-19-03:2025

IEC/IEEE 65700-19-03
Edition 2.0 2025-07
REDLINE VERSION
INTERNATIONAL
STANDARD
REDLINE VERSION
Bushings for DC application
ICS 29.080.20 ISBN 978-2-8327-0585-8
EC/IEEE 65700-19-03:2025-07 RLV(en)

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© IEC/IEEE 2025
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 11
2 Normative references . 11
3 Terms, definitions, acronyms and symbols variables . 13
3.1 Terms and definitions . 13
3.2 List of acronyms and variables . 16
4 Profiles and use of normative references . 17
5 Ratings . 17
5.1 Rated voltages . 17
5.1.1 Rated continuous DC voltage . 17
5.1.2 Rated peak voltage . 18
5.1.3 Rated harmonic voltages . 18
5.2 Insulation levels . 18
5.3 Rated currents . 18
5.3.1 General . 18
5.3.2 Pure DC voltage applications . 18
5.3.3 Combined voltage applications . 19
5.4 Rated frequency . 19
4.5 Pollution parameters .
5.5 Unified Specific Creepage Distance . 20
6 Operating conditions . 22
6.1 Electrical requirements .
6.2 Mechanical requirements .
6.1 General . 22
6.2 Factors affecting design, testing and application . 23
6.3 Altitude correction . 24
6.4 Interchangeability . 27
6.5 Transformer insulating liquid . 27
7 General requirements . 27
7.1 Nameplate markings . 27
8 Test requirements . 28
8.1 General requirements . 28
8.2 Test conditions . 29
8.2.1 Air temperature . 29
8.2.2 Humidity . 29
8.2.3 Correction factors . 29
8.3 Test classification . 29
8.3.1 Type (or design) tests . 29
8.3.2 Routine tests . 30
8.3.3 Special tests . 30
9 Type (design) tests . 30
9.1 Dry power-frequency voltage withstand test with partial discharge
measurement . 30
9.1.1 Applicability . 30
9.1.2 Test method and requirements . 31

© IEC/IEEE 2025
9.1.3 Acceptance . 31
9.2 Dry lightning impulse voltage withstand test (LI or BIL) . 31
9.2.1 Applicability . 31
9.2.2 Test method and requirements . 31
9.2.3 Acceptance . 31
9.3 Dry or wet switching impulse voltage withstand test (SILSI or BSL) . 31
9.3.1 Applicability . 31
9.3.2 Test method and requirements . 32
9.3.3 Acceptance . 32
9.4 Electromagnetic compatibility tests (EMC) . 32
9.4.1 Emission test . 32
8.4.2 Immunity test .
9.5 Temperature rise test . 33
9.5.1 Applicability . 33
9.5.2 Test method and requirements . 33
9.5.3 Acceptance . 34
9.6 Cantilever load withstand test . 34
9.6.1 Applicability . 34
9.6.2 Test method and requirements . 34
9.6.3 Acceptance . 35
9.7 Tightness test on liquid-filled, compound-filled and liquid-insulated bushings . 36
9.8 Internal pressure test on gas-filled, gas-insulated and gas-impregnated
bushings . 36
9.9 Verification of dimensions . 36
9.10 Draw-lead bushing cap pressure test . 36
9.10.1 Applicability . 36
9.10.2 Test method and requirements . 36
9.10.3 Acceptance . 36
10 Routine tests . 36
10.1 Measurement of dielectric dissipation factor (tan δ) and capacitances . 36
10.1.1 Applicability . 36
10.1.2 Test method and requirements . 36
10.1.3 Acceptance . 36
10.2 Dry lightning impulse voltage withstand test (LI or BIL) . 37
10.2.1 Applicability . 37
10.2.2 Test method and requirements . 37
10.2.3 Acceptance . 37
10.3 Dry power-frequency voltage withstand test with partial discharge
measurement . 37
10.3.1 Applicability . 37
10.3.2 Test method and requirements . 37
10.3.3 Acceptance . 38
10.4 DC applied voltage withstand test with partial discharge measurement . 39
10.4.1 Applicability . 39
10.4.2 Test method and requirements . 39
10.4.3 Acceptance . 40
10.5 Polarity reversal test with partial discharge measurement . 40
10.5.1 Applicability . 40
10.5.2 Test method and requirements . 40

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© IEC/IEEE 2025
10.5.3 Acceptance . 42
10.6 Dry switching impulse voltage withstand test .
...