Electrical Operation - Toshiba HV6AS Instruction Manual

Page 20
MANUAL CLOSING (Manual Spring-Operated
U and L Types):
1. Check to make sure that the On-Off
indicator shows OFF (green).
2. Turn the closing handle clockwise. The
breaker will close (On-Off indicator changes
to ON) after
approximately 75°.
NOTE If the handle is turned in small
increments, the closing spring will
store the energy from the handle
action and the circuit breaker will
close before 75° of rotation.
3. Release the handle, and it will return to its
initial position.
MANUAL OPENING (All Types):
1. Push the trip lever in the direction of the
arrow (Fig. 25).
2. The On-Off indicator changes to OFF
(green).

ELECTRICAL OPERATION

The flow chart shown in Fig. 27 illustrates the
sequence of electrical operation of the MU and
ML type circuit breakers.
Refer to Fig. 26 and the circuit breaker
schematics shown in Fig. 28 through Fig. 31 for
determining external control circuit connections
to the circuit breaker.
the handle is turned
Fig. 25 Manually Opening Breaker
SYMBOL
M Motor
TC Voltage Trip Coil
UV Undervoltage Trip Coil
a1 to a6 Auxiliary Contacts (N.O.)
b1 to b6 Auxiliary Contacts (N.C.)
X Control Relay
X-a Control Relay Contact (N.O.)
X-b Control Relay Contact (N.C.)
Y Auxiliary Relay
Y-a Auxiliary Relay Contact (N.O.)
Y-b Auxiliary Relay Contact (N.C.)
LS1 to LS3 Limit Switches
R1 to R4 Resistors
REC Rectifier
D Diode
C Capacitor
SP Surge Protector
RL Red Lamp
GL Green Lamp
Fig. 26 Legend for Schematics
OPERATION
DESCRIPTION