Manually Operated JR Switch Panel Assembly

Figure 5-22.-Snap switch panel assembly. flashing system indicators when a warning or emergency condition occurs. Motor-driven dual-cam and three-cam activated switches open and close control or status signal circuits to provide the flashing effect on indicator lamps. Snap Switch Panel Assembly The snap switch panel assembly (fig. 5-22) provides manual control of switchboard power buses. An individual panel mat contains either one or two snap switches. The snap switch (fig. 5-23) is a device that opens or closes a circuit with a quick motion. Rotary snap Figure 5-23.-Snap switch. switches are used extensively in the distribution sections of switchboards to connect the shipboard power supplies to the various switchboard power buses. Manually Operated JR Switch Panel Assembly The manually operated JR switch panel assembly (fig. 5-24) provides manual switching and action cutout (ACO) functions. The manually operated JR switch panel assembly uses either a 2JR or 4JR switch. Both switch types are similar in construction and differ only in the electrical application because of switching action. A JR switch as shown in figure 5-25 is made up of a variable number of wafer-like sections, As the switch is manually positioned, one or more moveable contacts are positioned to each switch position on the wafer. The contacts may connect (bridge) two or more contacts on each wafer effectively opening or closing circuit paths as required to configure the system for normal or alternate operation. Remotely Operated JR Switch Panel Assembly The remotely operated JR switch panel (fig. 5-26) provides remote and manual control of signal routing and ACO switching. The automatic junction rotary (AJR) switches used in these assemblies are driven by a motor and gear train servo system. The automatic switches allow control of switching functions from remote stations. Analog switchboards used with combat Figure 5-24.-Manually operated JR switch panel assembly. 5-14