RE: looking for used power supply
Recent products introduced by Elgar, Pacific Power, and others have an output range from DC to kHz, perform a multitude of EMC/safety measurements and test conditions, are no larger than 4U (some are smaller), and full featured for less than $8k(US). There are less expensive AC sources available (some $3k), but they may not be instrument-grade. Tell your boss to open his wallet let the moths free... For simple production-line testing, that required some degree of automation, I've use motor-driven variacs. For even more simple (simplistic ?) requirements, I've used zero-sense crossing SSRs that switch taps in transformer windings. And, given a clear requirements specification, I am certain that the clever people of this listserv will think of solutions that are much more elegant. I speak only for myself. Brian -Original Message- From: Fred Townsend [mailto:f...@poasana.com] Sent: Friday, May 11, 2001 10:59 AM To: Brian O'Connell Cc: 'emc-p...@majordomo.ieee.org' Subject: Re: looking for used power supply Please visit the web pages of Elgar, Pacific Power, Agilent, etc. The requirement should be obvious. I am very familiar with this type equipment. If you are familiar with this type equipment you should also know that an Elgar covering this power range, variable from say 40 to 400 Hz costs upwards of $25K, takes 5 rack bays to house, and 6 weeks to order in. On the other hand if Mike is simply looking for something to make 50 Hz from 60 Hz then a simple motor gen set costing a few $K will do the job. Finally if Mike is really trying to hook up a single phase load to a 3 phase main, then all he needs is the right transformer. $1K The operative word here is variable and in what context. It seemed obvious to me that Mike was not familiar with this subject and could have mis-specificed his requirements, i.e. did he say variable when he meant compatible? Fred Townsend --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net 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://www.rcic.com/ click on Virtual Conference Hall,
Re: looking for used power supply
How about the good old HP Harmonic Flicker Test Sysytem that Agilent was thinking about discontinuing support on? (remember that thread a while ago?) I don't know about the current (it seems like I remember 9-10A max), but I know you could dial in any voltage and frequency (DC-500Hz??) and it would produce it! If Agilent did discontinue support, you could probably get a great deal! Dave Mike Stone wrote: Good Day, I am looking into purchasing a used power supply. Minimum requirements are: 3 phase input, single phase output variable frequency, 50/60 Hz variable voltage, 120VAC, 230 VAC 3 KVA 16 Amps I have tried a number of resellers, with not much luck. Thank you in advance for your help. Best Regards, Michael Stone L. S. Compliance W66 N220 Commerce Court Cedarburg, WI 53012 V 262-375-4400 F 262-375-4248 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net 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://www.rcic.com/ click on Virtual Conference Hall,
RE: looking for used power supply
Sir, Please do not take as flame. I've yet to work at a company, that make products for connection to AC mains, intended for use in multiple countries, and being both serious professional about testing for compliance and performance, that did not have at least one of these instruments in the lab. Please visit the web pages of Elgar, Pacific Power, Agilent, etc. The requirement should be obvious. -Original Message- From: Fred Townsend [mailto:f...@poasana.com] Sent: Thursday, May 10, 2001 1:42 PM To: Mike Stone Cc: emc-p...@majordomo.ieee.org Subject: Re: looking for used power supply I can see why you might have difficulty finding such a device. Your specifications are ambiguous. Do you really mean variable frequency or the ability to operate from either 50 or 60 Hz mains. Ditto for variable voltage. 3000VA makes no sense in the context of 120VAC or 230VAC at 16 amps. It is not clear what commercial benefit such a device would have (except to separate a fool and his money) so I am skeptical you would ever find such a device used. --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net 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://www.rcic.com/ click on Virtual Conference Hall,
RE: looking for used power supply
Another option might be to use a variac (adjustable auto transformer) to adjust the input. -Original Message- From: Kenneth McCormick [mailto:kmccormick...@hotmail.com] Sent: Thursday, May 10, 2001 4:26 PM To: emc-p...@majordomo.ieee.org Subject: Re: looking for used power supply It sounds like Mike is looking for a power supply to provide power to test electrical devices (not a power supply to be installed in a product). I Interpret Mikes E-mail to be: The power supply should be able to supply 50-60Hz (when connected to a 60Hz supply, 3 phase supply (likely 120/208)) Single phase output variable over the range of 120-240V (Mike, I would suggest looking for something that can provide 90-260V) 16A Max (which would give you approximately 3KVA @ 240V (3840VA to be exact) Mike, Have you tried Elgar, Pacific Power, TestMart, or TestEquity? I have a 1.5KVA Elgar unit that I purchased used several years ago. They are VERY Hard to come by used (And rather expensive if purchased new) Are you set on using something that is powered from the AC Mains, or would you be willing to consider a Diesel Generator? Ken --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net 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://www.rcic.com/ click on Virtual Conference Hall,
Re: looking for used power supply
It sounds like Mike is looking for a power supply to provide power to test electrical devices (not a power supply to be installed in a product). I Interpret Mikes E-mail to be: The power supply should be able to supply 50-60Hz (when connected to a 60Hz supply, 3 phase supply (likely 120/208)) Single phase output variable over the range of 120-240V (Mike, I would suggest looking for something that can provide 90-260V) 16A Max (which would give you approximately 3KVA @ 240V (3840VA to be exact) Mike, Have you tried Elgar, Pacific Power, TestMart, or TestEquity? I have a 1.5KVA Elgar unit that I purchased used several years ago. They are VERY Hard to come by used (And rather expensive if purchased new) Are you set on using something that is powered from the AC Mains, or would you be willing to consider a Diesel Generator? Ken From: Fred Townsend f...@poasana.com Reply-To: Fred Townsend f...@poasana.com To: Mike Stone mst...@lsr.com CC: emc-p...@majordomo.ieee.org Subject: Re: looking for used power supply Date: Thu, 10 May 2001 13:42:25 -0700 I can see why you might have difficulty finding such a device. Your specifications are ambiguous. Do you really mean variable frequency or the ability to operate from either 50 or 60 Hz mains. Ditto for variable voltage. 3000VA makes no sense in the context of 120VAC or 230VAC at 16 amps. It is not clear what commercial benefit such a device would have (except to separate a fool and his money) so I am skeptical you would ever find such a device used. Fred Townsend Silicon Valley Mike Stone wrote: Good Day,I am looking into purchasing a used power supply.Minimum requirements are: 3 phase input, single phase outputvariable frequency, 50/60 Hzvariable voltage, 120VAC, 230 VAC3 KVA16 Amps I have tried a number of resellers, with not much luck.Thank you in advance for your help. Best Regards, Michael Stone L. S. Compliance W66 N220 Commerce Court Cedarburg, WI 53012 V 262-375-4400 F 262-375-4248 _ Get your FREE download of MSN Explorer at http://explorer.msn.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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net 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://www.rcic.com/ click on Virtual Conference Hall,
RE: looking for used power supply
Hi Michael, Can you be more specific about what you need for inputs and outputs? Or, perhaps, you could describe the problem you are trying to solve? Max Kelson Evans Sutherland -Original Message- From: Mike Stone [mailto:mst...@lsr.com] Sent: Thursday, May 10, 2001 1:10 PM To: emc-p...@majordomo.ieee.org Subject: looking for used power supply Good Day, I am looking into purchasing a used power supply. Minimum requirements are: 3 phase input, single phase output variable frequency, 50/60 Hz variable voltage, 120VAC, 230 VAC 3 KVA 16 Amps I have tried a number of resellers, with not much luck. Thank you in advance for your help. Best Regards, Michael Stone L. S. Compliance W66 N220 Commerce Court Cedarburg, WI 53012 V 262-375-4400 F 262-375-4248 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net 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://www.rcic.com/ click on Virtual Conference Hall,
Re: looking for used power supply
I can see why you might have difficulty finding such a device. Your specifications are ambiguous. Do you really mean variable frequency or the ability to operate from either 50 or 60 Hz mains. Ditto for variable voltage. 3000VA makes no sense in the context of 120VAC or 230VAC at 16 amps. It is not clear what commercial benefit such a device would have (except to separate a fool and his money) so I am skeptical you would ever find such a device used. Fred Townsend Silicon Valley Mike Stone wrote: Good Day,I am looking into purchasing a used power supply.Minimum requirements are: 3 phase input, single phase outputvariable frequency, 50/60 Hzvariable voltage, 120VAC, 230 VAC3 KVA16 Amps I have tried a number of resellers, with not much luck.Thank you in advance for your help. Best Regards, Michael Stone L. S. Compliance W66 N220 Commerce Court Cedarburg, WI 53012 V 262-375-4400 F 262-375-4248
looking for used power supply
Good Day, I am looking into purchasing a used power supply. Minimum requirements are: 3 phase input, single phase output variable frequency, 50/60 Hz variable voltage, 120VAC, 230 VAC 3 KVA 16 Amps I have tried a number of resellers, with not much luck. Thank you in advance for your help. Best Regards, Michael Stone L. S. Compliance W66 N220 Commerce Court Cedarburg, WI 53012 V 262-375-4400 F 262-375-4248
