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9-5 FUSE HOLDER and CIRCUIT BREAKER
9-5-l CIRCUIT BREAKER
Push the power switch on and check continuity. If current
flows, it is normal.
Devices such as that shown in Fig. 92 are necessary for
checking the circuit breaker if it properly operates. The
rated current is shown on the side of the circuit breaker.
Adjust the load switch until the ammeter reads about twice
the rated current marked on the circuit breaker. The circuit
breaker is normal if it turns off an)-where between 0.5 and
30 seconds.
Fig. 9-6
Commercial power supply
a large-capacity generator
or
--
AMMETER
Fig. 9-7
9-5-2 FUSE HOLDER
FUSE HOLDER
Check that a fuse is in the fuse holder and check its conti-
nuity with a tester. (-See Fig. 9-g.) If it carries current. it is
normal.
If there is no current, take the fuse out and check it for
continuity. If the fuse carries current. the fuse holder is
faulty. If the fuse carries no current, replace it with a fuse
of the correct capacity, and check the fuse holder again for
continuity.
Fuse capacity 1s 10.4.
Fig. 9-8
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