AS 2081.1-1988

1 - AS 2081.1-1988 ELECTRICAL EQUIPMENT FOR COAL AND SHALE MINES - ELECTRICAL PROTECTION DEVICES - GENERAL REQUIREMENTS
4 - PREFACE
4 - CONTENTS
5 - SECTION 1. SCOPE AND GENERAL
5 - 1.1 SCOPE.
5 - 1.2 REFERENCE DDOCUMENTS.
5 - 1.3 DEFINITIONS.
5 - 1.3.1 Back-up protection
5 - 1.3.2 Circuit interrupting device
5 - 1.3.3 Core-balance earth-leakage protection
5 - 1.3.4 Current-transformer-operated (residual current) earth-fault protection
5 - 1.3.5 Earth-continuity monitoring system
5 - 1.3.6 Earth-fault current
5 - 1.3.7 Earth-fault current limitation
5 - 1.3.8 Earth-fault protection
5 - 1.3.9 Earth-leakage current
5 - 1.3.10 Earth-leakage protection
5 - 1.3.11 Lockout earth-fault protection
5 - 1.3.12 Main protection
5 - 1.3.13 Neutral-connected (zero-sequence) impedance
6 - 1.3.14 Operating time of a protective device
6 - 1.3.15 Operating value
6 - 1.3.16 Prospective earth-fault current of a system
6 - 1.3.17 Protection device
6 - 1.3.18 Rated loading time
6 - 1.3.19 Rated operating value
6 - 1.3.20 Rated supply voltage
6 - 1.3.21 Series-connected (zero-sequence) impedance
6 - 1.3.22 Series-neutral earth-leakage protection
6 - 1.3.23 System voltage
6 - 1.3.24 Time delay
6 - 1.3.25 Tripping ratio
6 - 1.4 SERVICE CONDITIONS.
7 - SECTION 2. DESIGN AND CONSTRUCTION
7 - 2.1 MOUNTING POSITION.
7 - 2.2 CONNECTIONS.
7 - 2.3 RATINGS.
7 - 2.4 PROTECTION AGAINST COMPONENT FAILURE
7 - 2.5 RELAYS.
7 - 2.6 RELAY CONTACTS.
7 - 2.7 CORROSION PROTECTION.
7 - 2.8 FACILITY FOR ADJUSTMENT.
7 - 2.9 PERFORMANCE.
7 - 2.10 MARKING.
7 - 2.10.1 Labelling of main unit.
7 - 2.10.2 Labelling of auxiliary components.
8 - APPENDIX A - INFORMATION ON THE PRINCIPLES OF EARTH-LEAKAGE PROTECTION, LOCKOUT EARTH-FAULT PROTECTION, EARTH-CONTINUITY

Specifies general requirements for the design, construction and marking of electrical protection devices for coal and shale mines. It includes requirements for elements that detect the faulty condition, equipment for initiating tripping or locking-out of circuit-breaking devices, and equipment for limitation of earth-fault currents.

This Standard applies to equipment for current-operated earth-leakage protection, lockout earth-fault protection, earth-continuity protection and earth-fault current limiting for use in coal and shale mines. It is limited to electrical systems supplying equipment above and below ground. It includes requirements for elements that detect the faulty condition, equipment for initiating tripping or locking-out of circuit interrupting devices, and equipment for limitation of earth-fault currents.It does not include requirements for circuit interrupting devices or sensitive earth-fault protection devices of the type used for portable hand-held tools as these requirements are set out in other Australian Standards. Information on the general principles of earth-leakage protection,lockout earth-fault protection, earth-continuity protection, and earth-fault current limitation is given in Appendix A.

Under Revision see DR 99409