Ground fault detection with location identification
First Claim
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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.
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Abstract
A ground fault detection scheme uniquely incorporated within a distributed intelligence, fire alarm and detection system, such that detection is achieved with location identification. The modules (and transponders) of the system collaborate with the loop controller in performing ground fault operations to determine precise existing ground conditions at the module locations.
24 Citations
6 Claims
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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:
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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 Dependent Claims (2, 3, 4, 5, 6)
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Specification