Standards aside, one other practical point to consider (all countries), the +/- 10% (or whatever) that may be quoted by (or required of) the utility company applies only to the point at which they deliver to their customer. There will then be an additional volt-drop within the customer's installation, from the utility supply point to the equipment connection. In a large industrial facility (factory), this may be significant.
The volt-drop might tend to be higher in 100V than 230V systems. Also, in many cases, the utility will be providing supply to a building or an entire factory site, at MV voltages, and the customer will be responsible for transforming to 100V (or 110/115/120/230/240V, etc.), and they will usually be free to decide whether they want to bother keeping to the +/- 10% range or not. best regards, glyn ---------------------------------------------- TUV Rheinland of North America, Inc. Product Safety & Quality Industrial Machinery Division (Chicago Office) Glyn R. Garside Senior Engineer 1945 Techny Rd, Unit 4 NORTHBROOK, IL 60062-5357, USA Tel (847)562-9888 ext 25 mailto:ggars...@us.tuv.com http://www.us.tuv.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
