BS EN 61558 PDF

Product Details IEC deals with safety aspects of isolating transformers for the supply of medical locations. This second edition cancels and replaces the first edition published in It constitutes a technical revision. The main changes consist of updating this part in accordance with IEC

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There are two basic types of socket-outlet intended to supply an electric shaver: The type with a transformer, and The type without. With certain exceptions only the type with a transformer may be installed in a location containing a bath or shower.

Information on both types is given in this article. Considerations applying to both types Whether with a transformer or without, shaver socket-outlets complying with the relevant British Standards accept only 2-pin reversible plugs of the kind normally fitted to an electric shaver, and are shuttered.

Both types of shaver socket-outlet may be either Class I construction having metal parts required to be earthed or Class II construction having no exposed metal parts required to be earthed. However, in all cases, a circuit protective conductor has to be run to and terminated at the shaver socket-outlet, just as is required for any other point or accessory Regulation The type with a transformer A shaver socket-outlet with a transformer is called a shaver supply unit.

A shaver supply unit complying with BS EN may be installed in zone 2 of a location containing a bath or shower Regulation Neither the rated supply voltage nor rated output voltage of a shaver supply may exceed V a. The output voltamperes must be not less than 20 VA and not more than 50 VA. Alternatively, a changeover switch may be provided to switch between the voltages. The selected output voltage setting has to be clearly discernible. The transformer is of the short-circuit proof type either inherently or noninherently.

A thermal cut-out is provided in a shaver supply unit to limit the temperature of the transformer under conditions of short-circuit or overload. The cut-out may be of either the self-resetting type or the manually resetting type.

The front of a shaver supply unit is marked with the rated voltage s and with the symbol shown left. A degree of protection of at least IPX1 is provided by a shaver supply unit. The type without a transformer A shaver socket-outlet without a transformer should conform to BS Regulation A shaver socket-outlet conforming to BS has a restricted continuous current rating of mA for use on voltages of V to V a.

The shaver socket-outlet incorporates a current limiting device, other than a fuse, which may be of either the manually-resetting or the self-resetting type.

The current limiting device operates within one hour at a current of mA, and within one minute at a current of mA. The socket-outlet may also incorporate a fuse complying with BS and having a current rating not exceeding 1 A, to protect the current-limiting device against fault current.

This is reinforced by Regulation A socket-outlet without a transformer is prohibited within 3 m horizontally from the boundary of zone 1 of a location containing a bath or shower Regulation For more information please visit www.

AR 350-38 PDF

BS EN 61558-2-15:2012

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BS EN 61558-1


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