AS 2644-1990

1 - AS 2644-1990 CAPACITORS FOR USE IN DISCHARGE LAMP CIRCUITS
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND GENERAL
6 - 1.1 SCOPE.
6 - 1.2 REFERENCED DOCUMENTS.
6 - 1.3 DEFINITIONS.
6 - 1.3.1 Rated voltage
6 - 1.3.2 Rated maximum temperature
6 - 1.3.3 Rated minimum temperature
6 - 1.3.4 Discharge resistor
7 - SECTION 2. GENERAL REQUIREMENTS
7 - 2.1 GENERAL.
7 - 2.2 TERMINATIONS.
7 - 2.3 CREEPAGE DISTANCES AND CLEARANCES
7 - 2.4 VOLTAGE RATING.
7 - 2.5 FUSES.
8 - 2.6 DISCHARGE RESISTORS.
8 - 2.7 MARKING.
8 - 2.8 SAFETY REQUIREMENTS.
8 - 2.8.1 General.
8 - 2.8.2 General requirements of AS 3100.
9 - SECTION 3. TESTS
9 - 3.1 GENERAL TEST REQUIREMENTS.
9 - 3.2 TESTING SEQUENCE.
9 - 3.2.1 Test lot.
9 - 3.2.2 Initial tests.
9 - 3.2.3 Group tests.
9 - 3.3 SEALING AND HEATING TEST.
9 - 3.3.1 Application of heat.
9 - 3.3.2 Criterion of compliance.
9 - 3.4 HIGH VOLTAGE TEST BETWEEN TERMINALS.
9 - 3.4.1 Non-self-healing capacitors.
9 - 3.4.2 Self-healing capacitors.
9 - 3.4.3 Application of test voltage.
9 - 3.4.4 Criterion of compliance.
10 - 3.5 HIGH VOLTAGE TEST BETWEEN TERMINALS AND CONTAINER.
10 - 3.5.1 Application of voltage.
10 - 3.5.2 Criterion of compliance.
10 - 3.6 CAPACITANCE MEASUREMENT.
10 - 3.7 DISCHARGE RESISTOR TEST.
10 - 3.8 SELF-HEALING TEST.
10 - 3.9 DAMP HEAT (INSULATION RESISTANCE AND HIGH VOLTAGE) TEST.
10 - 3.9.1 General.
10 - 3.9.2 Humidity test chamber.
10 - 3.9.3 Conditioning.
10 - 3.9.4 Recovery.
10 - 3.9.5 Final measurements.
10 - 3.10 ENDURANCE TEST.
10 - 3.10.1 General.
11 - 3.10.2 Initial measurements.
11 - 3.10.3 Thermal cycling.
11 - 3.10.4 Application of voltage at elevated temperature.
11 - 3.10.5 Cyclic endurance test for non-self-healing capacitors only (alternative to Clauses 3.10.3 and 3.10.4).
11 - 3.10.6 Final measurements.
11 - 3.10.7 Conditions of compliance.
11 - 3.10.8 Service life objective.
11 - 3.11 DESTRUCTION TEST.
11 - 3.11.1 General.
12 - 3.11.2 Self-healing capacitors- Procedure 1.
13 - 3.11.3 Self-healing capacitors- Procedure 2.
14 - 3.11.4 Non-self-healing capacitors.
16 - APPENDIX A - DISCHARGE RESISTORS
17 - APPENDIX B - TEST VOLTAGE
18 - APPENDIX C - ENDURANCE TEST
18 - C1 CAPACITOR ARRANGEMENT.
18 - C2 VERIFICATION OF OVEN TEMPERATURE DISTRIBUTION.
18 - C3 TEST PROCEDURE.
19 - APPENDIX D - CONFORMITY OF PRODUCTION
20 - APPENDIX E - ADDITIONAL LONG-TERM ENDURANCE TEST (SERVICE LIFE OBJECTIVE)
20 - E1 GENERAL.
20 - E2 INITIAL MEASUREMENTS.
20 - E3 THERMAL CYCLING.
20 - E4 APPLICATION OF VOLTAGE AT ELEVATED TEMPERATURE.
20 - E4.1 General.
20 - E4.2 Test chamber.
20 - E5 FINAL MEASUREMENTS.
20 - E6 CONDITIONS OF COMPLIANCE.
20 - E7 ESTABLISHMENT OF AN INDIVIDUAL ACCELERATION FACTOR FOR A GIVEN TECHNOLOGY.

Specifies requirements for self-healing and non-self-healing capacitors rated greater than 0.1 µF, and intended for use in tubular fluorescent, high-pressure mercury and low-pressure sodium vapour discharge lamp circuits. Based on IEC 566.

This Standard specifies requirements for self-healing and non-self-healing continuously rated a.c. capacitors, of up to and including 2.5 kvar and not less than 0.1 mF and having a rated voltage not exceeding 1000 V, which are intended for use in discharge lamp circuits operating at 50 Hz a.c. at altitudes up to 3000 m.This Standard applies to capacitors intended for connection in shunt or in series with the lamp circuit or an effective combination of these. It covers only impregnated or unimpregnated capacitors having a dielectric of paper, plastics film, or a combination of both, either metallized or with metal foil electrodes.This Standard applies, in particular, to capacitors for use in those discharge lamp circuits or ballasts to which the relevant Australian Standard or Approval and Test Specification refers to reference hereto.This Standard does not apply to radio-interference suppressor capacitors, the requirements for which are given in AS 3145.NOTES:1. Requirements for capacitors having a capacitance not greater than 0.1 mF, for use with fluorescent lamp ballasts, are given in AS 3168.2. Discharge lamp circuits within the scope of this Standard are as follows:(a) Tubular fluorescent.(b) High-pressure mercury vapour.(c) Low-pressure sodium vapour.(d) High-pressure sodium vapour.(e) Metal halide.