Description of BS EN 62271-104:2015 2015

1.1 Scope

Subclause 1.1 of IEC 62271‑1:2007 is not applicable, and is replaced as follows:

This part of IEC 62271 is applicable to three-pole alternating current switches for rated voltages higher than 52 kV, 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.

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:

• 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.

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 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, 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 primary side of the transformer;

• applications requiring an increased number of operating cycles;

• switching under earth fault conditions in non-effectively earthed neutral systems.

1.2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

• IEC 60050‑441:1984, International Electrotechnical Vocabulary — Chapter 441: Switchgear, controlgear and fuses
• IEC 60071 (all parts), Insulation co-ordination
• IEC 60071‑1, Insulation co-ordination — Part 1: Definitions, principles and rules
• IEC 60270, High-voltage test techniques — Partial discharge measurements
• IEC 62271‑1:2007, High-voltage switchgear and controlgear — Part 1: Common specifications
  IEC 62271-1:2007/AMD1:2011
• IEC 62271‑100:2008, High-voltage switchgear and controlgear — Part 100: Alternating-current circuit-breakers
  IEC 62271-100:2008/AMD1:2012
• IEC 62271‑102:2001, High-voltage switchgear and controlgear — Part 102: Alternating current disconnectors and earthing switches
  IEC 62271-102:2001/AMD1:2011
  IEC 62271-102:2001/AMD2:2013
• IEC 62271‑110:2012, High-voltage switchgear and controlgear — Part 110: Inductive load switching

The following editions for this book are also available...

Format	Year	Publisher	Type	Title				Annual Price
	2020	BSI	Standards	BS EN 62271-104:2015 - TC Tracked Changes. High-voltage switchgear and controlgear - Alternating current switches for rated voltages higher than 52 kV				$648.41	Buy

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