AS 2081.4-1988

1 - AS 2081.4-1988 ELECTRICAL EQUIPMENT FOR COAL AND SHALE MINES - ELECTRICAL PROTECTION DEVICES - LOCKOUT EARTH-FAULT PROTECTION
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND GENERAL
5 - 1.1 SCOPE.
5 - 1.2 REFERENCED DOCUMENTS.
5 - 1.3 DEFINITIONS.
6 - SECTION 2. DESIGN AND CONSTRUCTION
6 - 2.1 GENERAL.
6 - 2.2 OPERATING VALUE.
6 - 2.3 TEST FACILITY.
6 - 2.4 INDICATION.
6 - 2.5 SUPPLY TRANSFORMERS.
6 - 2.6 INTRINSIC SAFETY.
6 - 2.7 MARKING.
7 - SECTION 3. TESTS
7 - 3.1 CATEGORIES OF TESTS.
7 - 3.2 ROUTINE TESTS.
7 - 3.2.1 General.
7 - 3.2.2 Compliance.
7 - 3.2.3 Verification of operating value.
7 - 3.3 TYPE TESTS.
7 - 3.3.1 General.
7 - 3.3.2 List and order of tests.
7 - 3.3.3 Operating value test.
7 - 3.3.4 Supply voltage variation test.
7 - 3.3.5 Ambi ent temperature variation test.
7 - 3.3.6 Endurance test.

Specifies requirements for lockout earth-fault protection devices intended primarily for use in conjunction with trailing cables supplying mobile and portable equipment.

This Standard specifies requirements for lockout earth-fault protection devices intended primarily for use in conjunction with trailing cables supplying mobile and portable equipment. In operation, the device monitors the condition of the cable prior to the application of power and prevents power being applied in the event of a fault between one or more active conductors and earth having resistance below a predetermined value.

Under Revision see DR 99412