5.2.1 ALTERNATE CONTROL CIRCUIT USED
A second type of electrical control is shown i n Fig. 9A
for all control voltages except 250 volts D .C . which uses
the circuit shown in Fig . 9. This alternate control circuit
elim inates the X-relay and CC switch shown in Fig. 9.
The m otor is energized through the "G" cutoff switch
and the K-relay contact. The motor is deenergized when
the "G" cutoff switch changes state wh ich occurs when
the closing spring is fully charged.
With the closing spring propped fully-charged, the
breaker is ready for closing. This m ay be accom p l ished
electrically by closing the "PB" switch on the breaker (if so
CONTROL
SOURCE
REMOTE
CLOSE
-{ �-,
t� PB
TC
equipped) or by a remote closing switch. Operation of the
, closing switch energizes the K-relay, which i n turn ener
gizes the closing solenoid "CC". This removes the p ro p ,
releasing the closing springs to close t h e breaker. The "F"
cutoff switch is only i nstalled on breakers using D.C.
control voltage.
The anti-pum p function is obtained through the nor
mally closed K-relay contact i n the m otor c i rcuit. If a
c lose signal is maintained after the breaker has tripped
open automatical ly, the K-relay is energized preventing
the m otor from charging the closing spri ng. The closing
signal m ust be removed for approxi m ately 1 .3 to 2.0
seconds to al low the closing spring to charge.
LEGEN D
CC -
CLOSING SOLENOID
F -
CUTOFF SWITCH, CLOSED
WHEN CLOSING SPRI NG IS
FU LLY CHARGED (D.C. O N LY)
G
-
CUTOFF SWITCH , OPEN
WHEN CLOSING SPRI NG IS
FULLY CHARGED.
L -
AUXI LIARY SWITCH
M -
CHARG ING MOTOR
PB -
CLOSE PUSH BUITON ON
BREAKER ESCUTCH EON.
OPTIONAL
TC -
S H U NT TRIP DEVICE
K -
ANTI-PU M P RELAY
FIG. 9A. ALTERNATE ELEMENTARY DIAGRAM. CONTACT POSITIONS ARE
SHOWN BREAKER OPEN AND CLOSING SPRINGS DISCHARGED.
TYP #1 83L7 1 2 "B" SERIES
1 2
www
. ElectricalPartManuals
. com
