Breaker Racked In - Lever And Armature
Linkage Pin Not Engaged
Breaker Being Racked Out -
Lever Activates Armature Linkage
FIG. 1 7 - CLOSING SPRING INTERLOCK
6.4 DISCONNECT POSITION INTER LOCK
The function of the Disconnect Position Interlock is to
block the RACKING SCREW cover open when the racking
mechanism is in the DISCONNECTED position. When the
cover is held open, the T R I P button is depressed. The
mechanism is held trip-free and there is no contact arm
movement when the closing spring is discharged by the
Closing Spring i nterlock.
The operation of this interlock is shown in Fig.
1 8 .
A
crank, which is attached to the racking mechanism shaft, is
connected to the blocking plate through a link. As the shaft
turns, the blocking plate rotates ; holding the cover open in
the D I SCONN ECTED position, but allowing it to close in
the TEST and CONN ECTED positions.
FIG. 1 8
DISCONNECT POSITION INTERLOCK
6.5 PADLOCKS
Provisions are made on all breakers to use padlocks to
prevent the breaker form being closed. For all breakers
except Type B or D the padlock shackle goes through the
TRI P button hole and out the slot in the side of the
escutcheon. For Type B or D breakers the padlock
shackle goes through the TRI P button hole and out the
RACKING SCREW cover hole in the deep escutcheon. I n
either case, the shackle holds the TRI P button in keeping
the mechanism trip-free.
1 7
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