AS 1265-1990

1 - AS 1265-1990 BUSHINGS FOR ALTERNATING VOLTAGES ABOVE 1000 V
4 - PREFACE
6 - CONTENTS
8 - SECTION ONE- GENERAL
8 - 1. Scope
8 - SECTION TWO- DEFINITIONS
8 - 2. Definitions
8 - 2.1 Bushing
8 - 2.2 Liquid-filled bushing
8 - 2.3 Liquid-insulated bushing
9 - 2.4 Gas-filled bushing
9 - 2.5 Gas-insulated bushing
9 - 2.6 Oil-impregnated paper bushing
9 - 2.7 Resin-bonded paper bushing
9 - 2.8 Resin-impregnated paper bushing
9 - 2.9 Ceramic, glass or analogous inorganic material bushing
9 - 2.10 Cast resin-insulated bushing
9 - 2.11 Composite bushing
10 - 2.12 Capacitance graded bushing
10 - 2.13 Indoor bushing
10 - 2.14 Outdoor bushing
10 - 2.15 Outdoor-indoor bushing
10 - 2.16 Indoor-immersed bushing
10 - 2.17 Outdoor-immersed bushing
10 - 2.18 Completely immersed bushing
10 - 2.19 Nominal voltage
11 - 2.20 Rated phase-to-earth voltage
11 - 2.21 Rated current
11 - 2.22 Rated thermal short-time current I
11 - 2.23 Rated dynamic current
11 - 2.24 Temperature rise
11 - 2.25 Nominal frequency
11 - 2.26 Rated density of insulating gas
11 - 2.27 Minimum operating density of insulating gas
11 - 2.28 Maximum operating pressure
11 - 2.29 Leakage rate of gas-filled and gas-insulated bushings
11 - 2.30 Insulating envelope
12 - 2.31 Creepage distance
12 - 2.32 Arcing distance
12 - 2.33 Test tap
12 - 2.34 Voltage tap
12 - 2.35 Rated voltage of the voltage tap
12 - SECTION THREE- RATINGS
12 - 3. Standard values of nominal voltage
12 - 4. Standard values of rated current
13 - 5. Standard values of rated thermal short-time current
13 - 6. Standard value of rated dynamic current
13 - 7. Minimum withstand values of cantilever load
14 - 8. Angle of mounting
14 - 9. Minimum nominal specific creepage distance
14 - 10. Temperature limits
15 - 11. Standard insulation levels
15 - 12. Maximum values of capacitance and dielectric dissipation factor of the test tap on transformer bushings
15 - SECTION FOUR- INFORMATION TO BE FURNISHED WHEN ORDERING AND MARKINGS
15 - 13. Enumeration of characteristics
15 - 13.1 Application
16 - 13.2 Classification
16 - 13.3 Ratings
16 - 13.4 Operating conditions
17 - 13.5 Design
17 - 14. Markings
17 - SECTION FIVE- OPERATING CONDITIONS
17 - 15. Temporary overvoltages
18 - 16. Altitude
18 - 17. Temperature of ambient air and immersion media
19 - SECTION SIX - TEST REQUIREMENTS
19 - 18. General
20 - 19. Test classification
20 - 19.1 Type tests
20 - 19.2 Routine tests
21 - 20. Condition of the bushings during the dielectric and thermal tests
22 - SECTION SEVEN - TYPE TESTS
22 - 21. Wet power-frequency voltage withstand test
22 - 22. Dry lightning impulse voltage withstand test
23 - 23. Dry or wet switching impulse voltage withstand test
23 - 24. Thermal stability test
24 - 25. Temperature-rise test
24 - 25.1 General
24 - 25.2 Test procedure
25 - 25.3 Measurement of temperature
26 - 26. Thermal short-time current withstand test
27 - 27. Dynamic current withstand test
27 - 28. Cantilever load withstand test
27 - 29. Tightness test on liquid-filled and liquid-insulated bushings
28 - SECTION EIGHT - ROUTINE TESTS
28 - 30. Measurement of the dielectric dissipation factor and the capacitance at ambient temperature
28 - 30.1 Measurement of the dielectric dissipation factor (tan
28 - 30.2 Maximum values of ....
29 - 30.3 Permissible values for the increase of the tan .. on capacitance graded bushings
29 - 30.4 Measurement of capacitance
29 - 31. Dry power-frequency voltage withstand test
29 - 32. Measurement of the partial discharge quantity
30 - 33. Tests of the tap insulation
31 - 34. Pressure test of gas-filled and gas-insulated bushings
31 - 35. Tightness test on liquid-filled and liquid-insulated bushings
31 - 36. Tightness test on gas-filled, gas-insulated and gas-immersed bushings
32 - 37. Tightness test at the flange or other fixing device
35 - AUSTRALIAN APPENDIX A - VARIATIONS TO IEC 137 REQUIRED FOR AUSTRALIAN CONDITIONS
35 - A1 SCOPE.
35 - A2 LIST.
37 - AUSTRALIAN APPENDIX B - APPLICABILITY OF TESTS FOR BUSHINGS WITH MAJOR INSULATION OF CERAMIC OR OTHER INORGANIC MATERIAL
38 - AUSTRALIAN APPENDIX C - APPLICABILITY OF TESTS FOR BUSHINGS WITH MAJOR INSULATION OF ORGANIC MATERIAL

Specifies bushings supplied separately for use in the construction of indoor and outdoor electrical equipment, transformers and electrical installations that are connected to a.c. systems having a rated voltage above 1000 V. The bushings are capacitance graded or non-capacitance graded. It is technically identical with and has been reproduced from IEC 137. Modifications have been included to suit Australian conditions.

This standard is applicable to bushings, as defined in Section Two, which are supplied separately, intended for use in electrical apparatus, transformers, and installations, for three-phase alternating current systems, having rated voltages above 1 000 V and frequencies between 15 Hz and 60 Hz. This standard is not applicable to bushings for use with rectifiers, rotating machines, testing transformers, or to terminals for power cables (potheads). Such bushings shall be subject to special agreement between supplier and purchaser.Moreover this standard is not applicable to insulating structures similar to bushings, which are used as support insulators inside metal-enclosed switchgear according to IEC Publication 517: High-voltage Metal-enclosed Switchgear for Rated Voltages of 72.5 kV and Above.Notes 1. - The application of this standard to bushings for other than three-phase systems should be subject to special agreement between supplier and purchaser.2. - If a bushing, due to its design or use, cannot be tested separately under the conditions specified in this standard, the test procedure should be subject to special agreement between supplier and purchaser.