×

Ground fault detection with location identification

  • US 5,644,293 A
  • Filed: 05/16/1995
  • Issued: 07/01/1997
  • Est. Priority Date: 05/16/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. An alarm system for detecting and warning of the presence of various alarm conditions at transponder units located in a plurality of respective zones, comprising:

  • a loop controller having a control panel and plurality of supply lines extending to said transponder units;

    a module, within each of said transponders, connected to said plurality of supply lines, said module being capable of initiating communication of the conditions in its respective zone to said loop controller;

    a plurality of circuits coupled to said module, said circuits including devices connected by field wiring; and

    ,first means for detecting a ground fault, including means for identifying at the control panel a particular location of a field wiring ground fault within a given transponder so as to expedite the repair of a ground fault condition.

View all claims
  • 8 Assignments
Timeline View
Assignment View
    ×
    ×