Derek: You want to locate one of those lights next to a transmitter that is used intermittently - the light sequences through LO-Medium-high then turns off only to come back on again when the transmitter is keyed.
The AC switching device lacks immunity to RF but it may be easily cured with the addition of a single resistor. Ralph Cameron EMC Consultant and Suppression of Consumer Electronic Equipment. (After sale) ----- Original Message ----- From: "Derek Walton" <l...@rols1.net> To: <carlos.perk...@eu.effem.com> Cc: "Jim Hulbert" <hulbe...@pb.com>; <emc-p...@ieee.org> Sent: Thursday, January 13, 2000 8:57 AM Subject: Re: Surge Test Performance Criterion > > Sorry Carlos, > > I can't go along with this one. If I'm using my PC here in the USA midwest and a > storm comes along I don't want my PC shutting itself off every few minutes.... Only > been hit directly with two lightning strikes this last 2 years, but during a storm > you can continuously heat squeaking as the modem is hit, I know the power is seeing > voltage surges too. I'll have to put a Dranitz on the power just to see what kinds > of voltage surges arrive.... The same applies to surges generated by motors etc. If > every time a motor switches on and my equipment does something, well that would have > to go back to the store. > > By the way, I don't expect to find in the small print all sorts of get out clauses > once I buy something.... > > A controlled shut down is there to prevent loss of life, destruction of the device, > or something as equally bad..... > > By the way, I was back home ( Manchester, England ) last October and bought my Mum a > light that turns on when you touch any metal part of it, it was CE marked. I have a > similar light here in the USA, mine's not CE marked. BOTH turn on/off when there are > voltage transients on the power line. Now you can wrangle all you want, but being > woken up in the middle of the night because the light turned on when the dishwasher > began it's Saver Seven ( low cost overnight electricity ) cycle, is not acceptable > performance! If then manufacturer calls this acceptable performance, then perhaps I > should call him/her in the middle of the night each time to confirm that > opinion...;-) > > What products do you make again;-))) > > Derek. > > > During surge > > carlos.perk...@eu.effem.com wrote: > > > Jim, > > > > I agree with you, on the basis that in this case, a complete shut-down is a > > designed-in function of the product, and the standard says "No degradation of > > performance or loss of function is allowed below a performance level specified > > by the manfucturer". You, as the manufacturer, are specifying this 'loss of > > function'. > > > > In my mind, all you have to do is make the end user aware that a shut-down will > > occur when a surge is detected, and you should be OK. > > > > Cheers, > > > > Carlos. > > > > Please respond to "Jim Hulbert" <hulbe...@pb.com> > > > > To: emc-p...@ieee.org > > cc: (bcc: Carlos A. Perkins/WIN/Effem) > > From: "Jim Hulbert" <hulbe...@pb.com> on 12/01/2000 20:08 > > > > Subject: Surge Test Performance Criterion > > > > A product has a switched mode power supply with a current sensing circuit that > > causes the supply to shut down when a surge pulse is applied to the AC mains in > > accordance with EN61000-4-5/IEC1000-4-5. After about 10 minutes, the supply can > > be turned back on and normal operation of the product can be resumed by the > > operator. Does this product conform to criterion B of the EN 50082-1 or EN > > 55024 standards? I believe it does because the sensing circuit is specifically > > designed to protect the product against this kind of voltage/current surge and > > the product operation is fully recoverable by the operator afterward. However, > > I would like to hear how others who do this testing would interpret this. > > > > Jim Hulbert > > Senior Engineer - EMC > > Pitney Bowes > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to majord...@ieee.org > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to ed.pr...@cubic.com, > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > roger.volgst...@compaq.com (the list administrators). > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to majord...@ieee.org > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to ed.pr...@cubic.com, > > jim_bac...@monarch.com, ri...@sdd.hp.com, or > > roger.volgst...@compaq.com (the list administrators). > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > jim_bac...@monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
