The provisions of the General Rules, IEC Publication 947-1, are applicable to this standard, where specifically called for. General Rules clauses and sub-clauses thus applicable, as well as tables, figures and appendices are identified by references to Part 1, for example: "Sub­ clause 1.2.3, Table IV or Appendix A or Part 1".
This standard applies to Automatic Transfer Switching Equipment (ATSE) to be used in emergency power systems with interruption of the supply to the load during transfer, the rated voltage of which does not exceed 1 000 V a.c. or 1 500 V d.c. lt covers ATSE provided with or without an enclosure.
Devices necessary for the control (e. g. control switches, ... ) and the protection (e. g. circuit-breakers, ... ) of an ATSE shall comply with the requirements of the relevant IEC standards.
ATSE used only for emergency lighting may be subject to specific rules and/or legal requirements and are not, therefore, covered by this standard.
The object of this standard is to state:
1) the cha racteristics of the equipment.
2) the conditions with which the equipment must comply with reference to:
a) operation for which the equipment is intended;
b) operation and behaviour in case of specified abnormal conditions, for example, short circuit;
c) dielectric properties.
3) The tests intended to confirm that these conditions have been met and the methods for performing these tests.
4) The data to be marked on the equipment and provided by the manufacturer.