Hello Mr jensen
Just add a MOV between the phases. A 20 mm disc type will survive both type testing and real life surges. The smaller ones risc failure in testing if that is done according to the proposed test schedules (due to the limited number of pulses they can absorb). 50% reduction of 1 or 2 kV : is that enough ?? The MOV wil limit the pulse to approx 1.7 times it's specified voltage. If you need better performance, use the transient suppressors. They usually limit the voltage to approx 20 % over the indicated value. The lower voltages ones 5-50 Volt up to 50%. If it is for mains applications, select transil value according to peak value of main sinus. Regards, Gert Gremmen, ing. -----Oorspronkelijk bericht----- Van: [email protected] <[email protected]> Aan: [email protected] <[email protected]> Datum: donderdag 23 april 1998 12:51 Onderwerp: Surge filter >Dear groupe, > >Does anyone have some good idears about designing a simple filter for >surges (the kind of surges that comes from testing according to IEC >61000-4-5) > >I was thinking about using an inductor, a capacitor and a MOV. But, what >is the requirements for the inductor ? and will it give enough reduction >of the puls at all. > >My experience is that a reduction of 50% is normally enough for our >equipment. > >Best regards, > >Mr. Kim Boll Jensen > >ScanView A/S >Denmark > >
