2-7
Figure 2-5 shows a glass-tube fuse. In figure 2-5, view A, notice the fuse link and the metal ferrules.
Figure 2-5, view B, shows a glass-tube fuse that is open. The open fuse link could appear either of the
ways shown in figure 2-5, view B.
Figure 2-5.—Cartridge-tube fuse.
Cartridge fuses are available in a variety of physical sizes and are used in many different circuit
applications. They can be rated at voltages up to 10,000 volts and have current ratings of from 1/500
(.002) ampere to 800 amperes. Cartridge fuses may also be used to protect against excessive heat and
open at temperatures of from 165 F to 410F (74C to 210C).
Q9. Label the fuses shown in figure 2-6 according to type.
Q10. Identify the open fuses shown in figure 2-6.
Figure 2-6.—Fuse recognition.
