TM 9-6115-668-13
4.63 CIRCUIT BREAKER MAINTENANCE.
This task covers:
a. Removal
b. Installation
Tools
Standard Mechanic’s Metric Tool Set
(item 2, appendix B)
Standard Electrician’s Metric Tool Set
(item 3, appendix B)
Materials/Parts
Equipment Conditions
Reference
Generator Set 150 kW shut
down,
paragraph 2.5.2
Cable ties
(item 10, appendix E)
1.
Open flap (2, figure 4-54) on unit hood assembly (1).
2.
Open front panel (4) on control cabinet assembly (3) and secure with prop (5).
3.
Open cable conduit (47) and cable conduit (60).
4. Circuit breaker F1 (32):
Removal procedure for circuit breaker F2 (33) is the same as forcircuit
breaker F1 (32), described below.
a. Record labeling and position of cable and disconnect cable (46) from terminal (45) of circuit
breaker F1 (32).
b. Loosen screw (41) at terminal of circuit breaker F1 (32) and screw at terminal of circuit breaker
F2 (33), and remove busbar (31) downward from terminals.
c. Use a screwdriver to push unlocking element (42) on circuit breaker F1 (32) in direction of arrow,
tilt circuit breaker F1 (32) upward and remove from mounting bar (14).
5. Circuit breaker F3 (8):
Removal procedure for circuit breaker F4 (34), F5 (35), F6 (36), F7 (37), F8
(38), F9 (39) is the same as for circuit breaker F3 (a), described below.
a. Record labeling and position of cable and disconnect cable (6) from terminal (7) of circuit
breaker F3 (8).
b. Loosen screw (10) at terminal of circuit breakers F3 (8) and F4 (34) to F9 (39), and remove bus-
bar (30) downward from terminals.
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