GE AKR-30 Series Maintenance Manual page 189

SECTION 5-Breaker Operation
A breaker may be eq u i pped to operate either manually
or electrical ly. Both types of operation resu lt i n the same
fast-closing movement as far as the contact action is
concerned. The variation is in the way energy is stored i n
t h e closing spring, and how it is released.
5.1 MAN UAL CLOSI NG
Man ually operated AKR breakers are constructed with
front-mounted hand les.
mechanism and fully charges the closing spring. A com­
p lete charge is accom p l ished by cranking the handle
through one cycle (1 35-degree swing). The C LOSE but­
ton mounted on the escutcheon, is used to manual ly close
the breaker contacts and the TRIP button is used to open
them.
If equipped with a closing solenoid, a manual breaker
may be closed remotely by a control switch or relay.
Before this can be done, however, the closi ng spring has
to be charged by hand. The closing solenoid is an op­
tional accessory and is not suppl ied un less spec ified i n
the breaker order.
CONTROL
SOURCE
� r
'I x
G l
FIG. 9 - ELEMENTARY DIAGRAM FOR ELECTRICALLY OPERATED DRAWOUT B R EAKER.
CONTACT POSITIONS ARE SHOWN WITH BREAKER OPEN AND CLOSING SPRINGS DISCHARGED.
Handle operation resets the
TYP #1 83L71 2 "R" SERIES
5.2 ELECTRICAL CLOSING
On electrically operated brea kers the closing springs are
charged by a gear motor. With the springs discharged,
voltage appl ied to the control circuit will energize the motor
through the " G " switch contacts - see Fig. 9 . The motor,
through the gear reduction output crank, compresses the
closing springs until they are fully charged. As this fully
charged position is reached , mechanically operated
switches " F" and "G" reverse their shown position, the " G "
switch deenerg izing the motor and the
"
l ishing a circuit to the
mechanical prop is positioned to prevent the discharge of
the fully charged closing spring.
With the closing spring propped ful ly-charged, the
breaker is ready for closing. This may be accomplished
electrically by depressing the closing switch " PB" on the
breaker (if so eq u i p ped) or by a remote closing switch.
Operation of the closing switch energ izes the "X" relay,
which in turn energizes the closing solenoid "CC". This
removes the prop, releasing the closing springs to close
the breaker.
As the closing solenoi d is energ ized , it energ izes anti­
" " .
pump relay W If the closing switch is maintained
closed , the anti-pump relay will remain picked-up to
prevent a second closing operation on the breaker in the
event it is tripped open automatically. The closing im­
p ulse must be released and reappl ied before a second
closing operation can occur.
The closing springs on electrical ly operated breakers
can be manually charged . The breakers can also be man­
ually closed . Refer to Section 5.4 for this procedure.
L E G E N D
CC - C LOS I N G SOLENOID
F - CUTOFF SWITC H , CLOSED
WHEN CLOS I N G SPRING IS
FULLY CHARGED.
G -
C UTOFF SWITC H . OPEN WHE N
CLOSING SPRING IS
F U L LY CHARG ED
AUXI LIARY SWITCH
L -
M - C H A R G I N G MOTOR
P B - C LOSE PUSHBUTION ON
B R EAKER ESCUTHEON,
OPTIONAL.
TC - S H U NT TR I P DEVICE
W - ANTI - P U M P R E LAY
TC
X -
CONTROL R E LAY
" "
F switch estab­
"
X relay. At the same time , a
1 1