UL also specifies a ringwave disturbance in several of their specifications. They require the wave form to have an "initial peak voltage of 6000 volts with a rise time of less than 0.5 micro seconds and successive peaks of the transient are to decay to a value of no more than 60 percent of the value of the preceding peak. My generator (Keytek) produces two variations of this wave, one with a peak short circuit current of 500A the other with a PSSC of 200A
Kevin Harris Manager, Compliance Engineering Digital Security Controls Canada +1 416 665-8460 Ext 378 e-mail [email protected] ---------- > From: John Tyler <[email protected]> > To: [email protected] > Subject: Re: Ringwave Pulse (?) specification > Date: Thursday, April 24, 1997 8:32 PM > > The ring wave is also known as the 100kHz ring wave and simulates power > line transients. The specification is found in IEEE/ANSI C62.41-1991, > originally derived from IEEE-Std-587. > > At 05:01 PM 4/24/97 PDT, you wrote: > >Hello there : > > > >Ring wave testing was performed in Acceptance Tests of Power Supplies. > > > >Review earlier issues of IEC 801 -1 ( Fast Transients.) > > > >You might find beside the Fast Transient - Decaying Wave the Ring Wave. > > > >If necessary give me a call at 408 735 5889. > > > >Frank. > > > > > >At 04:43 PM 4/24/97 -0400, you wrote: > >>An associate of mine in Germany is trying to track down information on a > >>"Ringwave pulse", possibly a (USA?) EMC susceptibility requirement. > >> > >>A) Can anyone direct me to the specification for this requirement? > >> > >>B) Are power supplies built in the US protected against this pulse? > >> > >> > >>ThanX and regards, Art Michael, Editor - IPSN
