Table of Contents
Abstract
Specifies essential safety requirements for approval and test purposes of miniature overcurrent circuit-breakers. It is intended to be read in conjunction with AS 3100.
Scope
This Specification applies to miniature overcurrent air-break circuit-breakers, referred to hereinafter as 'circuit- breaker(s)', having the following characteristics:
(a) Intended for the prevention of continued overloading of electrical circuit wiring.
(b) Have current ratings up to and including 125 A.
(c) Have current breaking capacities up to but not including 10 kA.
(d) Intended for use at low voltage.
A circuit-breaker intended only for the protection of electrical equipment as distinct from circuit wiring, and which is appropriately marked as such, is not within the scope of this Specification.
NOTES:
1 Voltages and currents referred to in this Specification relate to alternating currents except where otherwise specified and values quoted are r.m.s. values.
2 Attention is drawn to AS 2184 and AS 3858 which cover circuit-breakers having breaking capacities above 3 kA.
3 In the application of AS 3111, AS 2184 and AS 3858 to overcurrent circuit-breakers, the Electrical Regulatory Authorities have modified, or intend to modify the above Scope and will apply additional conditions for approvals purposes. An example of this is given in Appendix A.
Application
General requirements of AS 3100
This Specification shall be read in conjunction with AS 3100, and the appropriate provisions of AS 3100 shall apply to the construction of the circuit-breaker and the insulation or safeguarding of parts, or both, which normally carry current.
Specific requirements of this Specification
A circuit-breaker shall be deemed to comply with this Specification only if it complies with all the requirements of this Specification and passes the tests specified herein.
Requirements of other specifications
Equipment and components, the function of which is likely to give rise to a hazard, incorporated in a circuit-breaker, shall comply with the appropriate requirements of any relevant approval and test Specification.
Circuit-breakers with earth-leakage features
A circuit-breaker, within the scope of this Specification, which also provides earth-leakage protection, shall comply with all the requirements of this Specification and the relevant requirements of other applicable approval and test specifications, e.g. AS 3190, in respect of a current-operated earth-leakage circuit-breaker.
History
First published as AS C111-1938.
Second edition 1951.
Third edition 1956.
Fourth edition 1968.
Revised and redesignated AS 3111-1974.
Second edition 1980.
Third edition 1983.
Fourth edition 1994.