I would estimate the power factor for most capacitor input power supplies to be about 0.7, so a VDU operating at 330VA would have a power consumption of about 230W. Of course the power consumption will be higher if power factor correction has been added to meet the harmonics emissions standard,.
Richard Woods ---------- From: Fee John [SMTP:[email protected]] Sent: Tuesday, January 09, 2001 11:58 AM To: Newsgroup (E-mail) Subject: FW: power factor John Fee NETC, Enterprise Ireland Glasnevin, Dublin 9 Ireland Phone +353 1 8082214 Fax +353 1 8370705 E-mail [email protected] -----Original Message----- From: Fee John Sent: 09 January 2001 14:49 To: '[email protected]' Subject: power factor Hi everyone. Would anyone be able to help with the following question I received from a friend? I have a question : Can you tell me the typical power consumption of a desktop VDU. For example a Sun workstation VDU rating plate indicates 220-230 V 1.5A. Rather than assume or guess a power factor value, what would the power reading (Watts) be approximately at 220V for nornal operation ? What power factor value would you attribute to a modern desktop VDU ? Regards, Jonathan. John Fee NETC, Enterprise Ireland Glasnevin, Dublin 9 Ireland Phone +353 1 8082214 Fax +353 1 8370705 E-mail [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
