1 - AS 2431-1981 ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - ENCAPSULATED APPARATUS - TYPE OF PROTECTION m
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1. SCOPE AND GENERAL
7 - 1.1 SCOPE.
7 - 1.2 DEFINITIONS
7 - 1.2.1 Encapsulation
7 - 1.2.2 Encapsulated apparatus
7 - 1.2.3 Encapsulating material
7 - 1.2.4 Encased apparatus
7 - 1.2.5 Ignition temperature
7 - 1.2.6 Maximum surface temperature
7 - 1.2.7 Mould
7 - 1.2.8 Moulding
7 - 1.3 GROUPING.
7 - 1.4 TEMPERATURE CLASSIFICATION.
8 - SECTION 2. DESIGN AND CONSTRUCTION
8 - 2.1 ENCAPSULATED APPARATUS.
8 - 2.2 EARTHING.
8 - 2.3 ENCAPSULATING MATERIAL.
8 - 2.4 CASING.
8 - 2.5 THREADED JOINTS.
8 - 2.6 MEANS FOR CONNECTION OF EXTERNAL CIRCUIT CONDUCTORS.
8 - 2.7 WINDINGS.
8 - 2.8 MARKING.
9 - SECTION 3. TESTS
9 - 3.1 GENERAL.
9 - 3.2 DIMENSIONAL TESTS.
9 - 3.3 ENCAPSULATING MATERIAL TESTS.
9 - 3.3.1 General.
9 - 3.3.2 Electric Strength.
9 - 3.3.3 Withstand Value.
9 - 3.3.4 Water Absorption.
9 - 3.3.5 Igni tability and Combustion Propagation.
9 - 3.4 IMPACT TESTS.
9 - 3.5 FAULT LEVEL TEST.
9 - 3.6 COMPLIANCE WITH AS C100.
9 - 3.7 TEMPERATURE RISE TEST.
10 - APPENDIX A - INFORMATION TO BE CONTAINED IN DRAWINGS OF ENCAPSULATED ELECTRICAL APPARATUS
10 - A1 CONSTRUCTION.
10 - A2 HOLES.
10 - A3 CONDUCTORS.
10 - A4 MATERIALS.
11 - APPENDIX B - METHOD FOR THE DETERMINATION OF ELECTRIC STRENGTH
11 - B1 SCOPE.
11 - B2 FORM OF TEST SPECIMEN.
11 - B3 NUMBER OF TEST SPECIMENS.
11 - B4 ELECTRODES.
11 - B5 TEST VOLTAGE.
11 - B6 TRANSFORMER.
11 - B7 PROCEDURE.
12 - B8 REPORT.
12 - B9 NOTE ON PROOF TESTING (MINUTE VALUE).
13 - APPENDIX C - METHOD FOR THE DETERMINATION OF WATER ABSORPTION
13 - C1 SCOPE.
13 - C2 FORM OF TEST SPECIMEN.
13 - C3 NUMBER OF TEST SPECIMENS.
13 - C4 PROCEDURE.
13 - C5 CALCULATION.
13 - C6 REPORT.