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 INTERLOCK
The function of the D isconnect Position Interlock is to
block the RACKING SCREW cover open when the racking
mechanism is in the DISCONN ECTED 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 interlock.
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 DISCONN 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 8 or D the padlock shackle goes through the
TRI P button hole and out the slot in the side of the
escutcheon . For Type 8 or D breakers the padlock
shackle g oes through the TRI P button hole and out the
RACKING SCREW cover hole in the deep escutcheon. In
either case, the shackle holds the TRI P button in keeping
the mechanism trip-free.
1 7
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