KONTROLLSYSTEM FOR OVERVAKNING AV TENDFUNKTIONEN HOS SNABBA SLECKNINGSSYSTEM

摘要

In a fire sprinkler system a plurality of physically distributed actuators are connected in a normally balanced bridge circuit. The bridge circuit is impressed with a pulsed measuring voltage thereacross to conserve power. LEDs are connected to the bridge for indicating either normal or unbalanced conditions of the bridge as well as indicating which actuator branch of the bridge is causing unbalance.