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Standard [CURRENT]

DIN EN 61558-2-8:2011-03

VDE 0570-2-8:2011-03

Safety of transformers, reactors, power supply units and combinations thereof - Part 2-8: Particular requirements and tests for transformers and power supply units for bells and chimes (IEC 61558-2-8:2010); German version EN 61558-2-8:2010

German title
Sicherheit von Transformatoren, Drosseln, Netzgeräten und entsprechender Kombinationen - Teil 2-8: Besondere Anforderungen und Prüfungen an Transformatoren und Netzgeräten für Klingeln und Läutewerke (IEC 61558-2-8:2010); Deutsche Fassung EN 61558-2-8:2010
Publication date
2011-03
Original language
German
Pages
19

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Publication date
2011-03
Original language
German
Pages
19

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Overview

This part of IEC 61558 deals with the safety of bell and chime transformers and power supply units incorporating bell and chime transformers. Transformers incorporating electronic circuits are also covered by this standard. Safety includes electrical, thermal and mechanical aspects. Unless otherwise specified, from here onward, the term transformer covers bell and chime transformers and power supply units incorporating bell and chime transformers. This part is applicable to stationary, single-phase, air-cooled (natural or forced) independent or associated dry-type transformers. The windings may be encapsulated or non-encapsulated. This standard is applicable to transformers and power supply (linear). This standard shall be used in combination with part 2-16 for switch mode power supply (SMPS) units and is also applicable to power supplies with internal operating frequencies higher than 500 Hz. Where the two requirements are in conflict, the most severe takes precedence. The rated supply voltage shall not exceed 250 V a.c., and the rated supply frequency shall not exceed 500 Hz. This standard is applicable to transformers and linear power supply units with internal operating frequency not exceeding 500 Hz. The rated output shall not exceed 100 VA. The no-load output voltage shall not exceed 33 V a.c. or 46 V ripple-free d.c., and the rated output voltage shall not exceed 24 V a.c. or 33 V ripple-free d.c. Bell and chime transformers are generally intended to supply domestic sound signalling equipment and other similar devices where the load is applied for short periods of time. The responsible Committee is K 323 "Transformatoren, Drosseln, Netzgeräte und entsprechende Kombinationen" ("Transformers, reactors, power supply units and corresponding combinations thereof") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.

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