AS/NZS 2081:2011

Abstract

Specifies the performance requirements for protection devices intended for use with electrical supply networks utilizing earth fault current limitation techniques (IT networks).

Scope

This Standard sets out the design, performance, manufacturing, and testing requirements for electrical protection devices for use in surface and underground mines and quarries, where IT supply networks are utilized, and provides information on the general principles of -
earth fault current limitation;
earth continuity protection;
earth fault protection;
earth fault lockout protection;
NER integrity protection; and
frozen contact protection.

Whereas this Standard is based upon 50 Hz supply systems, it is envisaged that the equipment described may also be installed in systems with higher, lower or variable frequencies, or in d.c. supplied systems.
The effect of current upon the human body in 50 Hz supplied installations needs to be considered as detailed in AS/NZS 3000.
AS/NZS 60479, Parts 1 and 2 should be referenced for consideration of the effects of current at other supply frequencies upon the human body.
Refer to Appendix A for general information on the principles of electrical protection relevant to this Standard.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
Pages
ISBN
Committee	EL-023
Supersedes	AS/NZS 2081.2:2002 AS/NZS 2081.5:2002 AS/NZS 2081.3:2002 AS/NZS 2081.1:2002 AS/NZS 2081.4:2002 DR AS/NZS 2081