IEC 60076-15:2008

Power transformers - Part 15: Gas-filled power transformers

Applies to gas-filled power transformers (including auto-transformers) and to all construction technologies. May be applicable as a whole or in parts to other transformers.

Transformateurs de puissance - Partie 15: Transformateurs de puissance à isolation gazeuse

S'applique aux transformateurs de puissance à isolation gazeuse (y compris les autotransformateurs) et à toutes les technologies de construction. Peut être appliquée en totalité ou en partie à d'autres transformateurs.

General Information

• Status: Published
• Publication Date: 26-Feb-2008
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: TC 14 - Power transformers
• Drafting Committee: WG 30 - TC 14/WG 30
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 22-Apr-2015

Relations

• Revised: IEC 60076-15:2015 - Power transformers - Part 15: Gas-filled power transformers
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60076-15
Edition 1.0 2008-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Power transformers –
Part 15: Gas-filled power transformers

Transformateurs de puissance –
Partie 15: Transformateurs de puissance à isolation gazeuse

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IEC 60076-15
Edition 1.0 2008-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Power transformers –
Part 15: Gas-filled power transformers

Transformateurs de puissance –
Partie 15: Transformateurs de puissance à isolation gazeuse

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
T
CODE PRIX
ICS 29.180 ISBN 2-8318-9633-9
– 2 – 60076-15 © IEC:2008
CONTENTS
FOREWORD.4

1 Scope.6
2 Normative references .6
3 Definitions .7
4 Service conditions .8
5 Tappings .8
6 Connections .8
7 Ability to withstand short circuit .8
8 Rating .8
8.1 General .8
8.2 Rated power.8
8.3 Loading cycle .9
8.4 Preferred values of rated power .9
8.5 Operation at higher than rated voltage and/or at disturbed frequency .9
8.6 Loading beyond nameplate rating.9
9 Rating plate.9
9.1 Information to be given in all cases .9
9.2 Additional information to be given when applicable.10
10 Identification according to cooling method .11
11 Temperature-rise limits.11
11.1 Classification and insulation system temperature .11
11.2 Normal temperature-rise limits.12
11.3 Reduced temperature-rises for transformers designed for high cooling air
temperatures or special air cooling conditions .12
11.4 High altitude temperature-rise correction .13
11.5 Reduced temperature-rise for transformers designed for high cooling water
temperatures .13
11.6 Temperature-rise during specified load cycle.13
12 Insulation levels .13
13 Requirements for gases and gas tightness .13
13.1 Requirements for gases .13
13.2 Gas tightness .14
14 General requirements for tests .14
15 Measurement of winding resistance (routine test) .14
16 Measurement of voltage ratio and check of phase displacement (routine test) .15
17 Measurement of short-circuit impedance and load loss (routine test) .15
18 Measurement of no-load loss and current (routine test) .15
19 Tests on on-load tap-changers (routine test) .15
20 Measurement of zero-sequence impedance(s) on three-phase transformers
(special test) .15
21 Measurement of the harmonics of the no-load current (special test) .15
22 Separate-source AC withstand voltage test (routine test).15
23 Short-duration induced AC voltage test (ACSD) (routine or special test) .15

60076-15 © IEC:2008 – 3 –
24 Long-duration induced AC voltage test with partial discharge measurement (ACLD)
(routine or special test).15
25 Lightning impulse test (LI) (routine or type test).16
26 Test with lightning impulse chopped on the tail (LIC) (special test) .16
27 Switching impulse test (SI) (routine test for the transformers having highest voltage
higher than 170 kV) .16
28 Temperature-rise test (type test) .16
28.1 General .16
28.2 Corrections.16
29 Measurement of sound level (special test).16
29.1 General .16
29.2 Prescribed contour .16
30 Short-circuit test (special test) .17
31 Tightness tests (routine test) .17
32 Pressure tests for tanks (routine test) .18
33 Other special tests .18
34 Tolerances .18
35 Earthing terminal .18
36 Information required with enquiry and order.18

Annex A (informative) Information required with enquiry and order .19
Annex B (informative) Transient loading – Mathematical model.22

Bibliography.24

Figure B.1 – Temperature distribution model.22

Table 1 – Classification and insulation system temperature .12
Table 2 – Winding temperature-rise limits .12
Table 3 – Maximum permissible values of the average temperature of each winding.17

– 4 – 60076-15 © IEC:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER TRANSFORMERS –
Part 15: Gas-filled power transformers

FOREWORD
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