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Erratic short-circuit detection

專利號
US11176806B1
公開日期
2021-11-16
申請人
JOHNSON CONTROLS FIRE PROTECTION LP(US FL Boca Raton)
發(fā)明人
Alexandre Gouin; Nalin Ahangama Ralalage
IPC分類
G08B29/04; G08B29/06; H02H3/24; G08B25/04
技術領域
isolator,controller,voltage,short,current,ptest,may,isolation,line,alert
地域: FL FL Boca Raton

摘要

A fire detection system may include isolation circuit having an isolation switch coupled with a system line of the fire detection system and configured to isolate a first side of the system line from a second side of the system line. The isolation circuit may also include a controller coupled with the isolation switch. The controller may be configured to detect repetitive, intermittent short circuit activity on the system line and control the isolation switch based on this activity.

說明書

Therefore, as discussed above, embodiments of the present invention have at least the goals of: 1) preventing continuous alternating between isolation on and off; and 2) tracking false positives (shorts that are so quick, the controller does not have time to isolate them) and shortening the time to detect, so that they can be isolated.

The terms “short”, “short circuit” and “anomaly” have all been used to represent the same event. “short” and “short circuit” have been used often because the focus of the description has been the detection of short circuits; however use of these terms throughout this specification is not meant in any way to limit events to short circuits, except where the terms “short” and “short circuit” are used in the claims.

“Controller” as used herein may be implemented by, but is not limited to, a microprocessor, microcontroller, analog or digital circuit, an ASIC or fuzzy logic controller.

權利要求

1
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