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About This Item
Full Description
- 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 special- purpose 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.
This standard cancels and replaces IEC 60265-2:1988. The major changes with respect to IEC 60265-2 are as follows:
- alignment with IEC 62271-1 and IEC 62271-100;
- requirements for capacitive current switching aligned with those in IEC 62271-100: classes C1 and C2 are introduced.
This publication is to be read in conjunction with IEC 62271-1:2007, IEC 62271-100:2008, IEC 62271-102:2001 and IEC 62271-110:2005.
Document History
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IEC 62271-104 Ed. 3.0 b:2020
High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages higher than 52 kV- Most Recent
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IEC 62271-104 Ed. 2.0 b:2015
High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages higher than 52 kV- Historical Version
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IEC 62271-104 Ed. 1.0 b:2009
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High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages of 52 kV and above- Historical Version