Transcription of Fire Detection Systems Guide - Engineering Services
{{id}} {{{paragraph}}}
Example: air traffic controller
Fire Detection Systems Guide - Engineering Services
Conventionalsystemoperationdetection line operationConventional Detection systemsnormally operate on a 24 VDC the standby condition, thedetectors will draw a low current,typically less than 100 A. When thedetector senses a fire , it will switchinto the alarm condition with it'sLED illuminated, and will collapsethe line voltage by drawing a largercurrent - dependant on thedetectors and control panel, buttypically 50-80mA. The controlpanel can sense this, and activatethe appropriate alarms. Thedetector will remain latched in thealarm state with its LEDsilluminated, even if the smokeorheat is removed until it has beenresetfrom the panel by momentarilyremoving powerfrom the allows the fire to be locatedeven if the signal is intermittent,orto locate possible sourcesofnuisance some control panel - detectorcombinations, when a standardbase is used, there is anincompatibility between the currentspecifications of the detector andpanel, leading to incorrect reportingby the cont
The simplest end of line device is a resistor, which will draw a current distinct from the quiescent and alarm currents drawn by the detectors. Installation of detectors
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: