AS 1966.3-1990

1 - AS 1966.3-1990 ELECTRIC ARC WELDING POWER SOURCES - PLASMA ARC CUTTING AND WELDING TYPES
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 APPLICATION.
6 - 1.3 REFERENCED DOCUMENTS.
6 - 1.4 DEFINITIONS.
6 - 1.4.1 Constant current (CC) plasma arc power source
6 - 1.4.2 Duty cycle
6 - 1.4.3 Input current
6 - 1 4.4 Load voltage
6 - 1.4.5 Power source terminals
6 - 1.4.6 Maximum output current
6 - 1.4.7 Maximum short-circuit input current
6 - 1.4.8 100-percent duty cycle output current
6 - 1.4.9 Open-circuit voltage
6 - 1.4.10 Power factor
6 - 1.4.11 Rated input current
6 - 1.4.12 Rated input voltage
6 - 1.4.13 Rated output current
6 - 1.4.14 Rating of plasma arc power source
7 - 1.4.15 Rectifier
7 - 1.4.16 Rectifier assembly
7 - 1.4.17 Rectifier stack
7 - 1.4.18 Transformer/ rectifier plasma arc power source
7 - 1.4.19 Welder
7 - 1.5 SAFETY REQUIREMENTS.
7 - 1.5.1 General.
7 - 1.5.2 Earthing facilities.
7 - 1.5.3 Double insulation.
7 - 1.6 SERVICE CONDITIONS.
7 - 1.7 RATING.
7 - 1.7.1 General.
7 - 1.7.2 Rated load voltage.
8 - SECTION 2. PERFORMANCE REQUIREMENTS
8 - 2.1 OPEN-CIRCUIT VOLTAGE.
8 - 2.2 MAXIMUM SHORT-CIRCUIT INPUT CURRENT.
8 - 2.3 TOLERANCE ON APPLIED INPUT VOLTAGE.
8 - 2.4 POWER FACTOR CORRECTION.
8 - 2.5 TEMPERATURE LIMITS.
8 - 2.5.1 General.
8 - 2.5.2 Windings.
9 - SECTION 3. DESIGN
9 - 3.1 GENERAL.
9 - 3.2 TRANSFORMERS.
9 - 3.3 RECTIFIERS.
9 - 3.4 OPERATOR CONTROLS.
9 - 3.5 INPUT AND OUTPUT TERMINALS.
9 - 3.6 IDENTIFICATION OF CONNECTIONS.
9 - 3.7 INDICATION AND ACCURACY OF LOAD CURRENT
10 - SECTION 4. MARKING
10 - 4.1 GENERAL.
10 - 4.2 INFORMATION TO BE MARKED ON PLASMA ARC POWER SOURCES
10 - 4.3 POWER FACTOR CORRECTION MARKINGS.
10 - 4.4 VERIFICATION OF MARKINGS.
11 - SECTION 5. TESTS
11 - 5.1 REQUIREMENTS FOR TESTS.
11 - 5.1.1 General.
11 - 5.1.2 Type tests.
11 - 5.1.3 Routine tests.
11 - 5.2 INSULATION RESISTANCE TEST.
11 - 5.3 HIGH VOLTAGE TEST.
11 - 5.4 TEST OF EARTHING CONNECTION.
11 - 5.4.1 Test procedure.
11 - 5.4.2 Criteria.
12 - 5.5 TEST FOR OPEN-CIRCUIT VOLTAGE.
12 - 5.6 TEMPERATURE-RISE TEST.
12 - 5.7 TEST FOR RATED INPUT CURRENT.
12 - 5.8 POWER FACTOR TEST.
12 - 5.9 EARTH LEAKAGE TEST.
12 - 5.10 TEST FOR MAXIMUM SHORT-CIRCUIT INPUT CURRENT
13 - 5.11 TEST FOR RATED OUTPUT CURRENT.
13 - 5.12 TEST OF POWER RECTIFIER ASSEMBLY
14 - APPENDIX A - METHOD FOR THE DETERMINATION OF TEMPERATURE RISE
14 - A1 SCOPE.
14 - A2 PRINCIPLE.
14 - A3 DEFINITIONS.
14 - A3.1 Temperature rise
14 - A3.2 Ambient temperature
14 - A4 TEST CONDITIONS.
14 - A5 DETERMINATION OF AMBIENT TEMPERATURE.
14 - A6 MEASUREMENT OF TEMPERATURE RISE.
14 - A6.1 General.
14 - A6.2 Resistance method.
15 - A6.3 Thermometer or thermocouple method.
15 - A7 PROCEDURE.
15 - A8 REPORT.
16 - APPENDIX B - RATED 100-PERCENT DUTY CYCLE OUTPUT CURRENT
16 - APPENDIX C - DETERMINATION OF POWER FACTOR
16 - C1 SCOPE.
16 - C2 APPLICATION.
16 - C3 PRINCIPLE.
16 - C4 APPARATUS.
16 - C5 PROCEDURE.
16 - C6 REPORT.

Part 3 specifies the requirements for the design, performance and rating of arc welding power sources of the plasma type. It covers power sources for plasma arc cutting and welding and the electrical supply to associated torches. It applies to plasma arc power sources having an output of the drooping characteristic type (substantially constant current) and specifies limits for open-circuit voltages.

This Standard specifies requirements for the design, performance and rating of power sources for plasma arc cutting and plasma arc welding (herein after referred to as 'plasma arc power sources'). This Standard also includes requirements for the electrical supply to associated torches.