AS 2558-1982

1 - AS 2558-1982 TRANSFORMERS FOR USE ON SINGLE WIRE EARTH RETURN DISTRIBUTION SYSTEMS
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND GENERAL
5 - 1.1 SCOPE.
5 - 1.2 APPLICATION.
5 - 1.3 REFERENCED DOCUMENTS.
5 - 1.4 SERVICE CONDITIONS.
5 - 1.5 DEFINITIONS.
5 - 1.5.1 Transformers.
5 - 1.5.2 Single-wire terminal (SW)
5 - 1.5.3 Earth-return terminal (ER)
5 - 1.6 TAPPINGS.
5 - 1.6.1 General.
5 - 1.6.2 Tapping Range.
5 - 1.6.3 Tap-changing.
6 - SECTION 2. RATING
6 - 2.1 GENERAL.
6 - 2.2 RATED POWER.
6 - 2.2.1 SWER Isolating Transformers.
6 - 2.2.2 SWER Distribution Transformers.
6 - 2.3 RATED VOLTAGE.
6 - 2.4 RATING PLATES.
10 - SECTION 3. TEMPERATURE RISE
10 - 3.1 IDENTIFICATION ACCORDING TO COOLING METHOD.
10 - 3.2 TEMPERATURE-RISE LIMITS.
11 - SECTION 4. INSULATION LEVELS
11 - 4.1 HV WINDINGS.
11 - 4.2 LV WINDINGS.
12 - SECTION 5. TESTS
12 - 5.1 GENERAL.
12 - 5.2 EQUIVALENT DISTURBING CURRENT TEST.
12 - 5.2.1 General.
12 - 5.2.2 Measurement of Equivalent Disturbing Current.
13 - APPENDIX A - INFORMATION REQUIRED WITH ENQUIRY AND ORDER
13 - A1 NORMAL.
13 - A2 SPECIAL.
14 - APPENDIX B - DETAILS OF TANK FITTINGS
14 - B1 CONSERVATORS.
14 - B2 BREATHER.
14 - B3 OIL LEVEL INDICATOR.
14 - B4 LIFTING ARRANGEMENTS.
14 - B5 THERMOMETER POCKETS.
14 - B6 MOUNTING ARRANGEMENT.
14 - B7 ARRANGEMENT OF BUSHINGS.

Relates to isolating and distribution transformers for use on SWER distribution systems, and is intended to be used in conjunction with AS 2374, which applies to SWER transformers except where its requirements are amplified or modified by this Standard.

This standard specifies requirements for isolating and distribution transformers for use on single wire earth return (SWER) distribution systems.

Reconfirmed 1987