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Circuitry for indicating the presence of an overload or short circuit in solid state relay circuits

  • US 4,931,778 A
  • Filed: 02/27/1989
  • Issued: 06/05/1990
  • Est. Priority Date: 02/27/1989
  • Status: Expired due to Term
First Claim
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1. In a solid state relay circuit using a power semiconductor as the output circuit switching device and having protection against current overload and short circuits, an indicator circuit for signaling that overload currents have occurred in the switching device comprising means for sensing that current overload protection has occurred, and switching means responsive to the sensing that current overload protection has occurred for operating a current overload indicator.

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