AS 2326.1-1991

1 - AS 2326.1-1991 ON-LOAD TAP-CHANGERS - REQUIREMENTS
4 - PREFACE
5 - CONTENTS
6 - SECTION ONE - GENERAL
6 - 1. Scope
6 - 2. Service conditions
7 - 3. Information required with enquiries and orders
7 - SECTION TWO - DEFINITIONS
7 - 4. Definitions relating to on-load tap-changers (excluding motor-drive mechanisms)
11 - 5. Definitions relating to motor-drive mechanisms
13 - SECTION THREE - REQUIREMENTS FOR ON-LOAD TAP-CHANGERS
13 - 6. Rating
14 - 7 Design and construction
15 - 8. Type tests
27 - 9. Routine tests
28 - 10. Nameplate
28 - SECTION FOUR - REQUIREMENTS FOR MOTOR-DRIVE MECHANISMS FOR ON-LOAD TAP-CHANGERS
28 - 11. Design and construction
30 - 12. Type tests
31 - 13. Routine tests
32 - 14. Nameplate
33 - APPENDIX A - SUPPLEMENTARY INFORMATION ON SWITCHING DUTY RELATING TO TAP-CHANGERS WITH RESISTOR TRANSITION ONLY
33 - A1. Additional definitions
34 - A2. Duty on main and transi tion contacts
37 - APPENDIX B - METHOD OF DETERMINING THE EQUIVALENT TEMPERATURE OF THE TRANSITION RESISTOR USING POWER PULSE CURRENTS
38 - APPENDIX C - SIMULATED CIRCUITS FOR SERVICE DUTY AND BREAKING CAPACITY TESTS
41 - AUSTRALIAN APPENDIX AA - VARIATIONS FROM IEC 214 REQUIRED FOR AUSTRALIAN CONDITIONS

Specifies design requirements and tests for on-load tap-changers and their motor-drive mechanisms immersed in transformer oil. It applies also to gas-insulated tap-changers, but excludes tap-changers for transformers for railway rolling stock. This Standard is technically identical with IEC 214:1989, On-load tap-changers.

This standard applies to on-load tap-changers* for power transformers and their motor-drive mechanisms. It relates mainly to tap-changers immersed in transformer oil according to IEC Publication 296, but may also be used for gas-insulated tap-changers in so far as conditions are applicable.Note.- For the purpose of this standard, a synthetic insulating liquid is regarded as an oil. A synthetic insulating liquid can be used for a tap-changer only if it is compatible with the tap-changer design.Tap-changers for transformers for railway rolling stock are excluded from this standard.In selecting a tap-changer for a particular application, reference should be made to IEC Publication 542.

First published as AS C378-1967.
Revised and redesignated AS 2326.1-1980.
Second edition 1991.