Figure 2-3. Checking Single Phase Circuit Fuses.

TM 55-1905-223-24-17

In a single phase circuit, turn the power ON and check between A, and G (ground) with a

voltmeter (FIGURE 2-3). If no voltage is read, the A to A1 fuse is defective. Make the same

check between B1, and G. If no voltage is read, the B to B1 fuse is defective.

Figure 2-3. Checking Single Phase Circuit Fuses.

In a three phase circuit turn the power ON and check between A-C1, C-B1, and C-A1 with a

voltmeter (FIGURE 2-4). If no voltage:

A-C1 = blown C fuse.

C-B1 = blown B fuse.

C-A1 = blown A fuse.

Figure 2-4. Checking Three Phase Circuit Fuses.

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