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The safe operation of electronic converters is dependent on the maximum permissible temperature not being exceeded at the measuring point. Vossloh-Schwabe has determined a casing temperature measuring point – tc max. – on all converter casings. To avoid shortening the service life or diminishing operating safety, the stipulated maximum temperature must not be exceeded at this tc point. This point is determined by testing the converter during normal, IEC-standardised operation at the specified ambient temperature (ta), which is also indicated on the type plate. As both the design-related ambient temperature and the converter´s inherent heat generation, as determined by the installed load, are subject to great variation, the casing temperature should be tested at the converter´s tc point under real installation conditions.
Temperature-protected converters feature a further protection symbol, namely a triangle containing the maximum temperature. This symbol certifies that the stipulated surface temperature of the device casing will not be exceed during any operating state or in the event of a defect.
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Vossloh-Schwabe electronic converters are tested in accordance with EN 61347. Function tests are carried out in accordance with EN 61047. VS converters can be operated without causing any inadmissible system reactions as all devices comply with EN 61000–3–2 on the limitation of mains harmonics. They also meet the EMC requirements of EN 61547. These devices are thus also protected against mains surges (as defined in the standard) that can be caused by, for instance, inductive ballasts during combined operation of fluorescent and low-voltage halogen lamps.
In addition, all devices comply with the RFI requirements of EN 55015. As the highly effective integrated filter can only limit the unit´s own interference, the secondary conductor should be kept to under 2 metres in length so as to avoid RFI interference in the lighting system.
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