IEC 62271-104-2015 pdf free download – High-voltage switchgear and controlgear – Part 104: Alternating current switches for rated voltages higher than 52 kV.
1General1.1Scope
Subclause 1.1 of lEC 62271-1:2007 is not applicable,and is replaced as follows:
This part of lEC 62271 is applicable to three-pole alternating current switches for ratedvoltages higher than 52 kV, having making and breaking current ratings，for indoor andoutdoor 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 theirauxiliary 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 swichare covered by lEc 62271-102.
The main object of this standard is to establish requirements for switches used intransmission and distribution systems. General-purpose switches for this application aredesigned to comply with the following service applications:
arrying 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.
Afurther object of this standard is to establish requirements for limited-purpose and special-purpose switches used in transmission and distribution systems.
Limited-purpose switches comply with one or more of the service applications indicatedabove.
Special-purpose switches may comply with one or more of the service applications indicatedabove and, in addition, are 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 primaryside of the transformer;
applications requiring an increased number of operating cycles;
switching under earth fault conditions in non-effectively earthed neutral systems.
1.2Normative references
The following documents, in whole or in part, are normatively referenced in this document andare indispensable for its application.For dated references, only the edition cited applies. Forundated references，the latest edition of the referenced document (including anyamendments) applies.
IEC 60050-441:1984，International Electrotechnical Vocabulary – Chapter 441: Switchgear,controlgear and fuses
IEC 60071(all parts),Insulation co-ordination
lEC 60071-1,Insulation co-ordination – Part 1 : Definitions, principles and rulesIEC 60270，High-voltage test techniques – Partial discharge measurements
IEC 62271-1:2007,High-voltage switchgear and controlgear – Part 1: Common specificationsIEC 62271-1:2007IAMD1:2011
IEC 62271-100:2008,High-voltage switchgear and controlgear – Part 100:Alternating-currentcircuit-breakers
lEC 62271-100:2008/AMD1:2012
IEC 62271-102:2001，High-voltage switchgear and controlgear – Part 102:Alternating currentdisconnectors and earthing switches
IEC 62271-102:2001/AMD1:2011IEC 62271-102:2001/AMD2:2013
IEC 62271-110:2012，High-voltage switchgear and controlgear – Part 110: Inductive loadswitching
Normal and special service conditions
Clause 2 of lEC 62271-1:2007/AMD 1:2011 is applicable.
3 Terms and definitions
Clause 3 of lEC 62271-1:2007 is applicable with the the following additions.
For the purposes of this document, definitions of general terms are based on lEC 60050-441and lEc 6oo71-1.
Additional terms and definitions are based solely on lEC 60050-441.
3.1General terms
Subclause
3.1 of lEC 62271-1:2007 is applicable.
3.2 Assemblies
Subclause 3.2 of IEC 62271 -1 :2007 is applicable.
3.3 Parts of assemblies
Subclause 3.2 of IEC 62271 -1 :2007 is applicable.
3.4 Switching devices
Subclause 3.4 of IEC 62271 -1 :2007 is applicable, with the following additions.
3.4.1 01
switch
switching device capable of making, carrying and breaking currents under normal circuit conditions, which may include specified operating overload conditions and also carrying for a specified time currents under specified abnormal circuit conditions, such as those of shortcircuit.IEC 62271-104 pdf download.