AS 1966.1-1985

1 - AS 1966.1-1985 ELECTRIC ARC WELDING POWER SOURCES - TRANSFORMER TYPE
4 - PREFACE
5 - CONTENTS
7 - SECTION 1. SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 APPLICATION.
7 - 1.3 REFERENCED DOCUMENTS.
7 - 1.4 DEFINITIONS.
7 - 1.4.1 Automatic metal-arc welding
7 - 1.4.2 Constant current (CC) welding powersource
7 - 1.4.3 Constant voltage (CV) welding power source
7 - 1.4.4 Diversity factor
7 - 1.4.5 Duty cycle
7 - 1.4.6 Electric arc welding power source (transformer type)
7 - 1.4.7 Flux cored arc welding (FCAW)
7 - 1.4.8 Gas metal-arc welding (GMAW)
7 - 1.4.9 Gas tungsten arc welding (GTAW)
8 - 1.4.10 Input current
8 - 1.4.11 Limited input power source
8 - 1.4.12 Load voltage
8 - 1.4.13 Manual metal-arc weldin g(MMAW)
8 - 1.4.14 Maximum output current
8 - 1.4.15 Maximum short-circuit input current
8 - 1.4.16 Minimum output current
8 - 1.4.17 Multi-operator welding power source
8 - 1.4.18 100-percent duty cycle output current
8 - 1.4.19 Open-circuit voltage
8 - 1.4.20 Power factor
8 - 1.4.21 Rated input current
8 - 1.4.22 Rated input voltage
8 - 1.4.23 Rated number of operators
8 - 1.4.24 Rated output current
8 - 1.4.25 Rating of electric welding power source
8 - 1.4.26 Rectifier
8 - 1.4.27 Rectifier assembly
8 - 1.4.28 Rectifier stack
8 - 1.4.29 Semi-automatic metal-arc welding
8 - 1.4.30 Single-operator welding power source
8 - 1.4.31 Transformer / rectifier welding power source
8 - 1.4.32 Welder
8 - 1.5 SAFETY REQUIREMENTS.
8 - 1.5.1 General.
8 - 1.5.2 Earthing facilities.
9 - 1.5.3 Double insulation.
9 - 1.6 SERVICE CONDITIONS.
9 - 1.7 RATING AND CLASSIFICATION.
9 - 1.7.1 Rating and classification of single-operator welding power sources.
9 - 1.7.2 Rating of regulators.
9 - 1.7.3 Rated load voltage.
11 - 1.7.4 Rating of transformers.
11 - 1.7.5 Rating of welding power sources with regulation taps
11 - 1.7.6 Rating of multi-operator welding power sources
12 - SECTION 2. PERFORMANCE REQUIREMENTS
12 - 2.1 OPEN-CIRCUIT VOLTAGE.
12 - 2.2 MAXIMUM SHORT-CIRCUIT INPUT CURRENT
12 - 2.3 TOLERANCE ON APPLIED INPUT VOLTAGE
12 - 2.4 POWER FACTOR CORRECTION.
12 - 2.5 OUTPUT CURRENT REGULATOR.
12 - 2.6 VOLTAGE REGULATION OF MULTI-OPERATOR WELDING POWER SOURCES
12 - 2.7 TEMPERATURE LIMITS.
12 - 2.7.1 General.
12 - 2.7.2 Windings.
12 - 2.7.3 Windings of oil-cooled transformers.
14 - SECTION 3. DESIGN AND CONSTRUCTION
14 - 3.1 GENERAL.
14 - 3.2 TRANSFORMERS.
14 - 3.2.1 General.
14 - 3.2.2 Transformers with screen.
14 - 3.2.3 Transformers without screen.
15 - 3.3 RECTIFIERS.
15 - 3.4 OPERATOR CONTROLS.
15 - 3.5 TERMINALS.
15 - 3.6 IDENTIFICATION OF CONNECTIONS.
15 - 3.7 LOADING OF MULTI-OPERATOR WELDING POWER SOURCES
16 - 3.8 INDICATION AND ACCURACY OF LOAD CURRENT FOR MANUAL METAL-ARC WELDING POWER SOURCES
17 - SECTION 4. MARKING
17 - 4.1 GENERAL.
17 - 4.2 INFORMATION TO BE MARKED ON TRANSFORMER TYPE WELDING POWER SOURCES
17 - 4.3 INFORMATION TO BE MARKED ON TRANSFORMERS AND REGULATORS
18 - 4.4 POWER FACTOR CORRECTION MARKINGS.
18 - 4.5 VERIFICATION OF MARKINGS.
19 - SECTION 5. TESTS
19 - 5.1 GENERAL REQUIREMENTS FOR TESTS
19 - 5.2 INSULATION RESISTANCE TEST.
20 - 5.3 HIGH VOLTAGE TEST.
20 - 5.4 TEST OF EARTHING CONNECTION.
20 - 5.4.1 Test Procedure.
20 - 5.4.2 Criteria.
20 - 5.5 TEST FOR OPEN-CIRCUIT VOLTAGE.
20 - 5.6 TEMPERATURE-RISE TEST.
20 - 5.7 TEST FOR MINIMUM OUTPUT CURRENT
20 - 5.8 TEST FOR RATED INPUT CURRENT.
20 - 5.9 TEST FOR TRANSFORMER VOLTAGE REGULATION (MULTI-OPERATOR WELDING POWER SOURCES ONLY)
20 - 5.10 EARTH LEAKAGE TEST.
21 - 5.11 TEST FOR MAXIMUM SHORT-CIRCUIT INPUT CURRENT
21 - 5.12 TEST FOR MAXIMUM OUTPUT CURRENT
21 - 5.13 TEST OF POWER RECTIFIER ASSEMBLY.
22 - APPENDIX A - METHOD FOR THE DETERMINATION OF TEMPERATURE RISE
22 - A1 SCOPE.
22 - A2 PRINCIPLE.
22 - A2.1 Continuous duty power sources.
22 - A2.2 Other than continuous duty power sources.
22 - A3 DEFINITIONS.
22 - A3.1 Temperature rise
22 - A3.2 Ambient temperature
22 - A4 TEST CONDITIONS.
22 - A5 METHOD FOR THE DETERMINATION OF AMBIENT TEMPERATURE.
22 - A6 METHOD OF MEASUREMENT OF TEMPERATURE RISE.
22 - A6.1 General.
22 - A6.2 Resistance method.
23 - A6.3 Thermometer method.
23 - A7 PROCEDURE.
23 - A7.1 Continuous duty welding power source.
23 - A8 REPORT.
24 - APPENDIX B - CALCULATION OF EQUIVALENT LOADINGS FOR MULTI-OPERATOR WELDING POWER SOURCES
24 - B1 KNOWN OPERATION SEQUENCE.
24 - B2 EXAMPLE.
24 - B2.1 Problem.
24 - B2.2 Solution.
24 - B3 UNKNOWN OPERATION SEQUENCE.
25 - APPENDIX C - RATED 100-PERCENT DUTY CYCLE OUTPUT CURRENT
26 - APPENDIX D - DETERMINATION OF POWER FACTOR
26 - D1 SCOPE.
26 - D2 APPLICATION.
26 - D3 PRINCIPLE.
26 - D4 APPARATUS.
26 - D5 PROCEDURE.
26 - D6 REPORT.
27 - APPENDIX E - SCHEDULE OF ROUTINE AND TYPE TESTS
27 - E1 INTRODUCTION.
27 - E2 GENERAL.
27 - E2.1 Type tests.
27 - E2.2 Routine tests.
27 - E3 CLASSIFICATION OF TESTS.

Specifies the requirements for the design, performance and rating of arc welding power sources of the transformer type. It covers transformer type power sources having an alternating current or direct current (rectified) output. Both single-operator and multi-operator machines are covered and calculations of equivalent loadings for multi-operator machines are included. Various routine and type tests are contained in the appendices.

This standard specifies requirements for the design, performance and rating of electric arc welding power sources (hereinafter referred to as 'welding power sources') with either-(a) transformers-for alternating current welding; or (b) transformer-rectifier units-for direct current, or alternating current/direct current, welding. This standard does not include requirements for connected equipment such as welding leads, electrode holders and automatic wire feeders, etc.

Obsolescent 23 January 2004