Figure 13-35.—Snap switch panel assembly.flashing system indicators when a warning oremergency condition occurs. Motor-driven dual-camand three-cam activated switches open and close controlor status signal circuits to provide the flashing effect onindicator lamps.Snap Switch Panel AssemblyThe snap switch panel assembly (figure 13-35)provides manual control of switchboard power buses.An individual panel mat contains either one or two snapswitches.The snap switch (figure 13-36) is a device thatopens or closes a circuit with a quick motion. Rotarysnap switches are used extensively in the distributionFigure 13-36.—Snap switch.Figure 13-37.—Manually operated JR switch panel assembly.sections of switchboards to connect the shipboardpower supplies to the various switchboard power buses.Manually Operated JR Switch Panel AssemblyThe manually operated JR switch panel assembly(figure 13-37) provides manual switching and actioncutout (ACO) functions.The manually operated JRswitch panel assembly uses either a 2JR or 4JR switch.Both switch types are similar in construction and differonly in the electrical application because of switchingaction. A JR switch as shown in figure 13-38 is madeup of a variable number of waferlike sections. As theswitch is manually positioned, one or more moveablecontacts are positioned to each switch position on thewafer. The contacts may connect (bridge) two or morecontacts on each wafer effectively opening or closingcircuit paths as required to configure the system fornormal or alternate operation.Remotely Operated JR Switch Panel AssemblyThe remotely operated JR switch, panel (figure13-39) provides remote and manual control of signalrouting and ACO switching. The automatic junctionrotary (AJR) switches used in these assemblies aredriven by a motor and gear train servo system. Theautomatic switches allow control of switching functionsfrom remote stations. Analog switchboards used withcombat direction systems use control signals providedby the multiplexing data converter to activate theswitches and provide status signals back to theconverter to indicate switch position to the system.13-38
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