AS 2326.2-1991

1 - AS 2326.2-1991 ON-LOAD TAP-CHANGERS - APPLICATION GUIDE
4 - PREFACE
5 - CONTENTS
6 - 1. Scope
6 - 2. Selection of a tap-changer
6 - 2.1 General remarks
6 - 2.2 Insulation level
7 - 2.3 Current and step vol tage
7 - 2.4 Breaking capacity
8 - 2.5 Number of tapping positions
8 - 2.6 Discharges during the operat ion of the change-over selectors
8 - 2.7 Mechanical life
8 - 2.8 Motor-drive mechanism
9 - 2.9 Pressure and vacuum tests
9 - 2.10 Low-temperature conditions
9 - 3. Location of oil-immersed tap-changer components
9 - 3.1 Tap selectors
9 - 3.2 Diverter and selector switches
9 - 3.3 Oil level alarm contacts
9 - 4. Field service
9 - 4.1 Safety of operation
10 - 4.2 Parallel operation
10 - 4.3 Contact erosion and oil contamination
10 - 4.4 Oil replacement
10 - 5. Information required with enquiry or order
10 - 5.1 Rating and general data
11 - 5.2 Insulation level
11 - 5.3 Pressure, vacuum and temperature requirements
11 - 5.4 Special
11 - 5.5 Fittings
12 - 5.6 Motor-drive mechanism
13 - AUSTRALIAN APPENDIX A - VARIATION FROM IEC 542 REQUIRED FOR AUSTRALIAN CONDITIONS
13 - A1 SCOPE
13 - A2 LIST

Provides guidance and recommendations to assist in the selection of on-load tap-changers for use with tapped windings of transformers or reactors. This Standard is technically identical with IEC 542:1976, Application guide for on-load tap-changers (as amended 1988).

This application guide is intended to assist in the selection of suitable on-load tap-changers for use in conjunction with the tapped windings of transformers or reactors which, in the following text, are referred to as transformers.As in the second edition of IEC Publication 214, On-load Tap-changers (revision of Publication 214 (1966)), the designation "on-load tap-changer" is shortened to "tap-changer" in the remainder of this guide and all the tap-changers referred to shall be presumed to comply with the requirements specified in IEC Publication 214.The recommendations of the application guide are not mandatory and only represent advice to the tap-changer manufacturer and purchaser. The responsibility for the correct application of the fully assembled tap-changer in connection with the transformer is with the manufacturer of the transformer.

First published as AS 2326.2-1980.
Second edition 1991.