Toshiba HV6AS instruction manual Electrical Operation, Symbol Description

Page 20 OPERATION

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 the handle is turned 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.

Fig. 25 Manually Opening Breaker

SYMBOL DESCRIPTION

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