GE AKR-30 Series Maintenance Manual page 196

SECTION 6-lnterlocks (Cont.)
KEY INTERLOCK-STATIONARY
6.6
B REAKER
The function of the Key I nterlock is to prevent an open
breaker from being closed when the lock bolt is extended
and its key is removed.
The o peration of this interlock is shown in Fig. 1 9. When
the breaker is in the OPEN position, the end plate assem­
bly item #2 on the main shaft pivots the lever item #6
counter-clockwise. This removes the pin item #3 on the
lever from blocking the lock bolt. Extending the lock bolt
rotates the linkage which moves the trip shaft, preventing
the m echanism from closing the breaker.
1 .
Lock
2.
End Plate
3. P i n
4 . Lock Bolt
5.
P i n
6 .
Leve r
SECTION 7- Breaker Maintenance
SAFETY PRECAUTION
WAR NING : B EFORE INSPEC TING OR BEGIN­
NING A N Y M A I N TENA N C E
BREA KER, IT MUST B E DISCONNECTED FROM
ALL VOL TA G E SOUR CES, B O TH P O WER A ND
CONTR OL, A ND THE BREAKER MUST BE IN THE
"OPEN" POSITION.
1 8
/ \
..
��
•
·. \ I �
:
I
./
I
' � /
FIG. 1 9 - KEY INTERLOCK-STATIONARY B R EAKERS
WORK ON
When the breaker is in the CLOSED position, the fly­
wheel assembly item #2 is away from the lever item #6.
The lever is spring loaded and rotates clockwise causing
its pin to block the l oc k bolt extension.
OPTIONAL INTERLOCKS
6.7
The optional interlocks are key i nterlocks and door inter­
locks. On drawout breakers, these devices are mounted in
the equipment and are part of the breaker enclosure.
2
\
\
\
6
7.1 LUBRICATION
I n general, the c i rcuit breaker req u i res moderate
l u bri cation. The m ajority of the factory l u bricated bear­
i ng poi nts and s l id i ng surfaces are accessible for i nspec­
THE
tion and if necessary, c lean ing and rel u bricating. The on­
ly l ubricant u sed on the breaker for both electrical and
mechanical areas is General
D50H D38 (D6A1 5AI Mobilgrease 28 or 32).
4
5
Electric spec ification