This part of IEC 62271 is applicable to three-pole alternating current switches for rated
voltages 52 kV and above, having making and breaking current ratings, for indoor and outdoor
installations, and for rated frequencies up to and including 60 Hz.
This standard is also applicable to the operating devices of these switches and to their
auxiliary equipment.
NOTE 1 Switches for gas insulated switchgear are covered by this standard.
NOTE 2 Switches having a disconnecting function and called switch-disconnectors are also covered by
IEC 62271-102.
NOTE 3 Earthing switches are not covered by this standard. Earthing switches forming an integral part of a switch
are covered by IEC 62271-102.
The main object of this standard is to establish requirements for switches used in
transmission and distribution systems. General-purpose switches for this application are
designed to comply with the following service applications:
– carrying rated normal current continuously;
– carrying short-circuit currents for a specified time;
– switching of mainly active loads;
– switching of no-load transformers;
– switching of the charging current of unloaded cables, overhead lines or busbars;
– switching of closed-loop circuits;
– making short-circuit currents.
A further object of this standard is to establish requirements for limited-purpose and specialpurpose
switches used in transmission and distribution systems.
Limited-purpose switches shall comply with one or more of the service applications indicated
above.
Special-purpose switches may comply with one or more of the service applications indicated
above and, in addition, shall be suitable for one or more of the following applications:
– switching single capacitor banks;
– switching back-to-back capacitor banks;
– switching shunt reactors including secondary or tertiary reactors switched from the primary
side of the transformer;
– applications requiring an increased number of operating cycles;
– switching under earth fault conditions in non-effectively earthed neutral systems.
BS EN 62271-104:2009 history
2015BS EN 62271-104:2015 High-voltage switchgear and controlgear. Alternating current switches for rated voltages higher than 52 kV
2009BS EN 62271-104:2009 High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages of 52 kv and above
0000 BS EN 60265-2:1994
1991BS EN 60265-2:1991 Specification for high-voltage switches - Specification for high-voltage switches - High-voltage switches for rated voltages of 52 kV and above