I'll second the experience with 85 Volts design target, which can be very common. The normal business practice for Japan (at least 8+ years ago) was to turn off power to an office complex Friday night, turn it back on Monday morning - this was shown as a huge dip on the distribution network, not to mention the braking effect on the generators (hence the tolerance to 47 Hz).
Keep in mind that Japan copied the same intent that the USA had when the electrical supply was introduced: 100 Volts at the customer site. The USA later on compensated for long distribution lines by raising the supply (can reach 127!), which led to 'normal' outlet of 115. Regards, Naftali Shani, Nortel Networks, Dept. 0S45, MS 117/C1/N04 21 Richardson Side Road, Kanata, Ontario, Canada K2K 2C1 Voice +1.613.765.2505 (ESN 395) Fax +1.613.763.3365 (ESN 393) E-mail: [email protected] <mailto:[email protected]> -----Original Message----- From: Grant, Tania (Tania) [SMTP:[email protected]] Sent: Wednesday, November 03, 1999 4:57 PM To: [email protected]; '[email protected]' Subject: RE: 90V & 47Hz - Is this a realistic combo Ages ago when I worked at another company that shipped products to Japan, their unwritten rule was to design in power supplies that operated without problems at 85 Vac, and that had better be designed/tested down to 80 Vac, because of the continued brown-out conditions in Japan. It seems nothing much has changed. I don't remember what was stated about the frequency tolerance. Tania Grant, [email protected] <[email protected]> Lucent Technologies, Communications Applications Group ---------- From: [email protected] [SMTP:[email protected]] Sent: Wednesday, November 03, 1999 10:34 AM To: [email protected] Subject: 90V & 47Hz - Is this a realistic combo See the website below for global mains voltage/frequencies: http://www.panelcomponents.com/guide.htm The most notable example listed would be Japan, 100V @ 50Hz, or 90V @ 47Hz under usual tolerances of -10% and -3Hz respectively. George Alspaugh Lexmark International Inc. ---------------------- Forwarded by George Alspaugh/Lex/Lexmark on 11/03/99 01:31 PM --------------------------- grassc%[email protected] on 11/03/99 12:59:30 PM Please respond to grassc%[email protected] To: emc-pstc%[email protected] cc: (bcc: George Alspaugh/Lex/Lexmark) Subject: 90V & 47Hz - Is this a realistic combo Hello standards sages.. We have a product that "stumbles" when the input voltage/freq is 90V/47Hz. My question is.. Is this a reasonable test combo? Does anyone know of a country that falls in this range? --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
