Racking Mechanism Interlock - GE AKR-30 Series Maintenance Manual

'
SECTION 6-lnterlocks
breakers are equipped
AKA
that are required by Industry Standards and Certifying Au­
thorities. Interlock devices for special applications are also
available as options. The standard interlock devices de­
scribed below are used only on drawout breakers. Station­
ary breakers have no required interlocks.
6.1 RACKING MECHANISM I NTERLOCK
The function of the racking mechanism interlock is
the breaker from moving from its
prevent
position before it is in the OPEN position.
The racking mechanism drive
cover
RACKING SCREW
must be slid to the right to gain access to the drive shaft.
When the breaker is in the CLOSED position,
gages the RACKING SCREW cover preventing it from
being opened. This link
OPEN/CLOSED indicator as shown in Fig.
The TRIP button also engages with the RACKING
SCREW cover in both the OPEN and CLOSED positions.
Therefore, the TRIP button must be pushed in before the
cover can be opened. This will open the breaker if it was
closed and also remove the OPEN/CLOSED linkage dis­
cussed above.
When the RACKING SCREW
TRIP button in. This keeps the breaker t
mechanism closing cycle will not cause contact movement
especially when the breaker is being racked in or out.
with safety interlock devices
CONNECTED
shaft is located behind the
14.
This cover
shown in Fig.
a
link en­
is driven by the motion
15.
c ve is open
o r it holds the
i
-
r p e
fr e
to
FIG. 1 4-A - RACKING SCREW
of the
so a
FIG.
14-B
15