AS 2380.6-1988

1 - AS 2380.6-1988 ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - EXPLOSION-PROTECTION TECHNIQUES - INCREASED SAFETY
4 - PREFACE
5 - CONTENTS
6 - SECTION 1. SCOPE AND DEFINITIONS
6 - 1.1 SCOPE.
6 - 1.2 REFERENCED DOCUMENTS.
6 - 1.3 DEFINITIONS.
6 - 1.3.1 Increased safety
6 - 1.3.2 Limiting temperature
6 - 1.3.3 Initial starting current IA
6 - 1.3.4 Starting current ratio I A /I N
6 - 1.3.5 Time tE
6 - 1.3.6 Thermal current limit I th
7 - 1.3.7 Dynamic current limit I dyn
7 - 1.3.8 Creepage distance
7 - 1.3.9 Clearance
7 - 1.3.10 Working voltage
8 - SECTION 2. REQUIREMENTS FOR THE CONSTRUCTION OF ALL ELECTRICAL EQUIPMENT
8 - 2.1. SCOPE OF SECTIONS.
8 - 2.2 TERMINALS FOR EXTERNAL CONNECTIONS.
8 - 2.3 INTERNAL CONNECTIONS.
8 - 2.4 CLEARANCES.
8 - 2.5 CREEPAGE DISTANCES.
8 - 2.5.1 General.
9 - 2.6 SURFACE PROFILES.
9 - 2.7 SOLID ELECTRICAL INSULATING MATERIALS.
9 - 2.7.1 General.
9 - 2.7.2 Thermal stability.
9 - 2.7.3 Insulating varnish.
9 - 2.8 WINDINGS.
9 - 2.8.1 General.
9 - 2.8.2 Coverings.
9 - 2.8.3 Compliance.
9 - 2.8.4 Impregnation.
9 - 2.8.5 Minimum size of wires.
11 - 2.9 LIMITING TEMPERATURE.
11 - 2.9.1 General.
11 - 2.9.2 Bare conductors.
11 - 2.9.3 Temperature of conductors.
11 - 2.9.4 Temperature of insulating windings.
11 - 2.9.5 Temperature of luminaires.
11 - 2.9.6 Measuring instruments and measurement transformers
11 - 2.9.7 Terminals.
11 - 2.9.8 Machines with cage rotors.
11 - 2.10 OVER-TEMPERATURE PROTECTION.
11 - 2.10.1 Windings.
11 - 2.10.2 Requirements for thermal protection.
11 - 2.10.3 Machines with cage rotors.
11 - 2.11 INTERNAL WIRING.
12 - 2.12 DEGREES OF PROTECTION FOR ENCLOSURES.
13 - SECTION 3. SUPPLEMENTARY REQUIREMENTS FOR CERTAIN ELECTRICAL EQUIPMENT
13 - 3.1 ROTATING ELECTRICAL MACHINES.
13 - 3.1.1 Degree of protection.
13 - 3.1.2 Internal fans.
13 - 3.1.3 Minimum radial air gap.
13 - 3.1.4 Machines with cage rotors.
13 - 3.2 LUMINAIRES DESIGNED FOR MAINS SUPPLY.
13 - 3.2.1 Permissible types.
13 - 3.2.2 Limiting distances.
14 - 3.2.3 Lampholders.
14 - 3.3 MEASURING INSTRUMENTS AND MEASURING TRANSFORMERS.
14 - 3.3.1 Rating.
14 - 3.3.2 Thermal and dynamic stress requirements.
14 - 3.3.4 Exception to requirements.
14 - 3.3.5 Moving coil instruments.
14 - 3.3.6 Current transformers.
14 - 3.4 TRANSFORMERS OTHER THAN MEASURING TRANSFORMERS
14 - 3.5 GENERAL PURPOSE CONNECTION AND JUNCTION BOXES.
14 - 3.5.1. Maximum dissipating power.
14 - 3.5.2 Selection of cables.
14 - 3.6 CABLE GLANDS.
14 - 3.7 CAPACITORS.
16 - SECTION 4. VERIFICATION AND TESTS
16 - 4.1 TYPE VERIFICATION AND TESTS.
16 - 4.2 ELECTRIC STRENGTH.
16 - 4.3 ROTATING ELECTRICAL MACHINES.
16 - 4.3.1 Locked rotor tests.
16 - 4.3.2 Machine orientation.
16 - 4.4 LUMINAIRES DESIGNED FOR MAINS SUPPLY.
16 - 4.4.1 Thermal test for luminaires with tubular fluorescent lamps
16 - 4.5 MEASURING INSTRUMENTS AND MEASURING TRANSFORMERS.
16 - 4.5.1 Temperature rise test.
16 - 4.5.2 Dynamic and thermal strength.
16 - 4.6 TRANSFORMERS OTHER THAN MEASURING TRANSFORMERS
16 - 4.7 ROUTINE VERIFICATION AND TESTS.
17 - SECTION 5. MARKING
17 - 5.1 GENERAL.
18 - APPENDIX A - TYPICAL ‘Ex e’ TERMINALS
19 - APPENDIX B - GUIDANCE FOR THE THERMAL PROTECTION OF CAGE MOTORS IN SERVICE
19 - B1 SCOPE.
19 - B2 PROTECTION DEVICES.
20 - APPENDIX C - LAMPHOLDERS AND LAMP CAPS FOR LUMINAIRES DESIGNED FOR MAINS SUPPLY
20 - C1 COMPLIANCE WITH AS 2480.
20 - C2 SCREW LAMPHOLDERS.
20 - C3 LAMPHOLDERS FOR TUBULAR FLUORESCENT LAMPS.
20 - C4 OTHER LAMPHOLDER TYPES.
21 - APPENDIX D - CAGE MOTORS - METHODS OF TEST AND OF CALCULATION
21 - D1 GENERAL.
21 - D2 EXPERIMENTAL DETERMINATION OF TEMPERATURE RISE.
21 - D3 CALCULATION OF TEMPERATURE RISE.
22 - D4 DETERMINATION OF TIME t
22 - D5 MOTORS DESIGNED FOR ARDUOUS STARTING CONDITIONS OR PROVIDED WITH SPECIAL PROTECTIVE DEVICES.
22 - D6 CONVERTORS.
23 - APPENDIX E - METHOD FOR DETERMINING PERMISSIBLE MAXIMUM DISSIPATING POWER

Specifies design, construction and testing requirements for increased safety electrical equipment for use in explosive atmospheres. Technically similar to IEC 79-7.

This Standard specifies requirements for the design, construction and testing of increased safety electrical equipment, type of protection 'e', intended for use in hazardous areas.This Standard supplements AS 2380.1.This Standard applies to electrical equipment and parts of electrical equipment which do not produce sparks or arcs or dangerous temperatures in normal service and which have rated voltages not exceeding 11 kV (phase-to-phase).NOTE: Electrical equipment which does not produce electric sparks or arcs in normal service attains the degree of safety required for electrical equipment of type of protection 'e' increased safety only by the application of the specific measures prescribed in this Standard.

Superseded 20 February 2005