5.2.1
ALTERNATE CONTROL CIRCUIT USED
A second type of electrical control is shown in Fig . 9A
for all control voltages except 250 volts D.C. which uses
the circuit shown in Fig . 9. This alternate control circuit
eliminates the X-relay and CC switch shown in Fig. 9.
The motor is energized through the "G" cutoff switch
and the K-relay contact. The motor is deenerg ized when
the "G" cutoff switch changes state wh ich occurs when
the closing spring is fully charged.
With the closi ng spring propped fully-ch arged, the
breaker is ready for closing. This may be accomplished
electrically by closing the "PB" switch on fhe breaker (if so
CONTROL
SOURCE
REMOTE
CLOSE
- 1 �-,
TC
equipped) or by a remote closing switch. Operation of the
closing switch energizes the K-relay, which in turn ener
g izes the closing solenoid "CC". This removes the p rop,
releasing the closing springs to close the breaker. The "F"
cutoff switch is only installed 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 motor circuit. If a
close signal is maintained after the breaker has tripped
open automatically, the K-relay is energ ized preventing
the motor from charging the closing spring. The closing
signal must be removed for approximately 1 .3 to 2.0
seconds to allow the closing spri ng to charge.
LEGEND
C C
-
CLOSING SOLENOID
F
-
CUTOF F SWITCH, CLOSED
W H EN CLOSING SPRI NG IS
FULLY CHARGED (D.C. O N LY)
G
-
CUTOFF SWITCH, OPEN
W H EN CLOSING SPRING IS
FULLY CHARGED.
L
-
AUXILIARY SWITCH
M
-
CHARG I N G MOTOR
PB -
CLOSE PUSHBUTION ON
BREAKER ESCUTCH EON.
O PTIONAL
TC
-
SHUNT TRIP DEVICE
K
-
ANTI-PU M P RELAY
FIG. 9A. ALTERNATE ELEMENTARY DIAG RAM . CONTACT POSITIONS ARE
SHOWN BREAKER OPEN AND CLOSING SPRINGS DISCHARG ED.
TYP
#183 L7 1 2 "B"
SERIES
1 2
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