Instruction manual

KRB-5377
37
4-2-4. Contact status of auxiliary and position switches
Tables 18 and 19 show the contact status of auxiliary switches and position switches respectively.
Table 18-1 Contact status of auxiliary switches
ACB state
Breaker
body position
ON OFF
Status of
a-contact
Status of
b-contact
ON OFF
CONN.
OFF ON
ON OFF
TEST
OFF ON
ON OFF
ISOLATED
OFF ON
ON OFF
Removed
OFF ON
Table 18-2 Contact status of auxiliary switches (When pursuant to ship classification society rules)
ACB state
Breaker
body position
ON OFF
Status of
a-contact
Status of
b-contact
ON OFF
CONN.
OFF ON
ON OFF
TEST
OFF ON
ON OFF
ISOLATED
OFF ON
ON OFF
Removed
OFF ON
Table 19 Contact statues of position switches
Position indication
Switch
ISOLATED TEST CONN.
Status of
a-contact
Status of
b-contact
ON OFF
CONN. position indication
OFF ON
ON OFF
TEST position indication
OFF ON
ON OFF
ISOLATED position indication
OFF ON
ON OFF
Inserted position indication *
OFF ON
* "Inserted" means that the breaker body is in the CONN., TEST, or ISOLATED position.
4-3. ON-OFF Button Cover Locking Procedure
Lock the button cover using a padlock with ø6 shackle (up to 3 padlocks can be used) as shown in Fig. 32. The ON-OFF button
cover is locked and the ON and OFF buttons cannot be operated.
Fig. 32 Locking the ON-OFF button cover
ON-OFF button cover
OFF button
Padlock
ON-OFF button cover
ON button
ON-OFF button cover locking
hole