help for snubber design

Discussion in 'General Electronics Chat' started by dileepchacko, Aug 30, 2008.

  1. dileepchacko

    Thread Starter Active Member

    May 13, 2008
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    Hi All

    I need help for designing a RC snubber for non potential contact of a simple switch with at least ( 4KV AC/DC isolation. The contact rating of the switch is 250V/5A. consider an inductance load is connecting through the switch and 220V DC is applying for the load. Consider the switch is closed for 50ms, suddenly it is opening. The problem is , a high voltage is around 600kV is developing across the switch for an instant of time. I need to suppress that transient voltage to at least 280V. The inductance details are L = 1.09H and Resistance of the inductor coil is R = 350 ohm. I have simulated a rough RC snubber in PSPICE. From the simulation it is clear that, 1.487KV is developing across the switch. I have attached the details of the simulation.
     
  2. bertus

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    Apr 5, 2008
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  3. SgtWookie

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