July, 2011
www.us-tech.com
Page 75 Premo: EMC Filters for Elevator Motors
Barcelona, Spain — A new family of EMC filters from Premo is specifically designed to deal with EMI generated by elevator motors. Filters are avail- able from 7 to 250A and can operate in applications with nominal voltages of 520VAC 50/60Hz, and a 720VAC version is also available. Connections are made with safety terminal blocks, sized according to the current. Filters are easy to install, and come in a very compact size. Today’s elevators use AC
motors that operate in switching mode to provide the variable speed, acceleration and braking required for passenger comfort. The switching mode operation of the motors gener-
Mornsun: Short-Ckt Protected DC/DC Converters
Hudson, MA — Mornsun has intro- duced the A_S-1WR & B_LS-1WR Series of SIP DC/DC low-cost con- verters that provide continuous short circuit protection. Until now, most design engineers have had to accept low-cost unregulated DC/DC converters that can fail quickly with a short circuit condition. The A_S-1WR and B_LS-1WR
products offer 1W of power in a high density package of 0.77 x 0.37 x 0.24- in. (19.56 x 9.4 x 6.1mm) package. These converters have the additional feature of being able to resist a con- tinuous short circuit. This can guar- antee the survival of the converter with a continuous output short cir- cuit, without needing to resort to the costly method of using feedback loops to cope with overload shorts.
ates EM havoc, producing disruptive EMI across the spectrum. Guarding against this EMI is the all-important
EMC filter that keeps a lid on this interference, restricting it to legal levels. Premo EMC includes in its broad range of products EMC filters that are especially designed for ele- vators, escalators, and other machines that use variable speed motors. Today’s regulations for Euro -
pean elevators includes the EMC tests according to European Norm EN12015:2005. The new FVDB fam- ily of filters is specially designed to satisfy the 2004/108/EC directive, according to EN12015:2005 stan- dard, for EMC conductive emission tests.
EMI filter for elevator motors. The company has developed a
manual of best practices to minimize the conductive emissions of the installation where these devices are installed. This manual includes rec- ommended techniques to help meet the limits established by the EN12015:2005 standard. Premo EMC filters have been
designed and built according to EN60939 and UL1283 standards. These are the compulsorily stan- dards for Europe and USA. Contact: Grupo Premo C/,
Conchita Supervia, 13, 08028 Barcelona, Spain % +34 934 098 980 fax: +34 934 906 682 E-mail:
info@grupopremo.com Web:
www.grupopremo.com
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DC/DC converters. The new converters accept 3.3,
5, 12, 15 or 24VDC input voltages and provide either single or dual out- puts of 3.3, 5, 9, 12, 15 or 24VDC. they provide a wide operating tem- perature range from -40 to +85°C ensuring reliable use in a variety of environmental conditions. The units have output short cir-
cuit protection, 1000VDC isolation, and a high MBTF of >1,000k hours. The converters use high quality, 100 percent RoHS compliant materials and are manufactured to the compa- ny’s rigorous, ISO-9001 quality con- trol program to ensure high product reliability. Contact: Mornsun America
LLC, 43 Broad Street, Suite B206, Hudson, MA 01749 % 978-567-9610 fax: 978-567-9601 E-mail:
sales@mornsunamerica.com Web:
www.mornsunamerica.com
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