KRB-5404
94
6) Pull out the OCR as shown in Fig. 90, remove the hand connector(s) above the OCR and place it on the floor. The hand
connector(s) below the OCR does not require to be removed. The type and quantity of the hand connectors vary depending on
the specification of the ACB.
Fig. 90 Removing hand connectors
7) Unscrew the contact block mounting screws as shown in Fig. 70 and flip the contact clock up as shown in Fig. 71.
8) Unscrew relay base mounting screws A and B, raise the relay base to unlatch from other parts, remove the base and place it on
the top of the breaker body. To remove relay base mounting screw B, use a ball end type 4-mm Allen wrench. See Fig. 91.
When relay base mounting screw A, the relay base ground terminal will also be removed.
Fig. 91 Relay base and related parts
Latch
Relay base mounting screw A,
Pan head M5 × 12
with spring and flat washers
Tightening torque: 2.7 - 3.5 N·m
Relay base ground terminal
Relay base
Relay base mounting screw B,
Hex. socket head M5 x 15
with spring and flat washers
Tightening torque: 2.7 - 3.5 N·m
Relay base mounting screw A
OCR
Hand connector