This Standard provides minimum requirements for the design and erection of high voltage installations in systems with nominal voltages above 1 kV a.c. and nominal frequency up to and including 60 Hz, so as to provide safety and proper functioning for the use intended.

For the purposes of this Standard, a high voltage installation is considered to be:

(a) An electricity network substation, under the control of an electricity network operator or entity authorized by a licence or other legal instrument to convey electricity.

(b) The high voltage parts of an electrical installation of a power station including all auxiliary systems and interconnecting lines and cables between power stations if on the same site.

(c) The high voltage parts of an electrical installation that are not covered in (a) and (b) above. This may include but not be limited to consumer and customer electrical installations serving premises such as factories, commercial facilities, industrial plants, institutional facilities and mine sites.

A high voltage installation includes, but is not limited to, the following equipment:

(i) High voltage electrical installations on masts, poles and towers.

(ii) Switchgear and/or transformers and/or electrical equipment located outside a closed electrical operating area.

(iii) Rotating electrical machines.

(iv) Switchgear, controlgear and assemblies.

(v) Transformers and reactors.

(vi) Converters.

(vii) Cables.

(viii) Lines.

(ix) Wiring systems.

(x) Batteries, battery chargers and associated d.c. supply systems.

(xi) Capacitors.

(xii) Earthing systems.

(xiii) Buildings and fences that are part of a closed electrical operating area.

(xiv) Associated protection, control, auxiliary and ancillary systems.

(xv) Structures, foundations, earthworks and drainage.

NOTE: In general, a Standard for an item of equipment takes precedence over this Standard.

This Standard does not apply to the design and erection of any of the following:

(A) Overhead lines and underground cables between separate installations.

(B) Ship and offshore installations.

(C) Mine site electrical installations, or parts of such installations, for which mining industry specific legislation sets other or additional requirements.

(D) Switchgear and/or transformers and/or electrical equipment located within a closed electrical operating area supplied at low voltage and where contact cannot be made with high voltage conductors.

(E) Test sites.

This Standard does not apply to the design of factory built, type-tested equipment for which separate Australian Standards exist (or IEC standards where Australian standards do not exist) to the extent of requirements covered by the standards. However, all other requirements of this Standard not covered by the type tests for the type-tested equipment must comply with this Standard. In particular, ground safety clearances and section safety clearances must comply with this Standard.

Section 11 of this Standard provides additional requirements for the high voltage parts of an electrical installation referred to under (c) above which is not under the control of an electricity network operator or entity authorized by a licence or other legal instrument to convey electricity.

NOTES:

1 Users of this Standard should be aware of existing local, state or national regulations.

2 Further requirements for specific locations may also be referenced or applied through legislation.

3 High voltage a.c. installations associated with electric traction systems are included.