23
The schematic shown in Figure 14 is
intended to aid in understanding the
mechanism operation discussed in this
instruction manual. It shows a drawout
circuit breaker as an example. Refer to the
schematic diagram furnished with your
circuit breaker for specific information.
Close coil (52SRC)
The close coil (3AY1510) is a standard
component of the circuit breaker that is
used to unlatch the stored energy of the
closing spring and thus close the circuit
breaker electrically. It is available for either
ac or dc operation. After completion of a
closing operation, the close coil is
de-energized internally. If operated with ac
voltage, a rectifier is installed in the circuit
breaker.
Trip coil (52T)
The trip coil (3AY1510) is a standard
component of the circuit breaker. The
electrically supplied tripping signal is passed
on to the trip-latching mechanism by means
of a direct action solenoid armature and the
circuit breaker is thus opened. It is available
for either ac or dc operation. After
completion of an opening operation, the
trip coil is de-energized internally. If
operated with ac voltage, a rectifier is
installed in the circuit breaker.
Figure 12: Use of manual spring-operation crank
Figure 13: Use of manual spring-charging crank
Item Description
50.0 Hand crank
50.5 Manual spring-charging port
53.0 Manual CLOSE pushbutton
54.0 Manual OPEN (TRIP)) pushbutton
55.0 CHARGED/DISCHARGED indicator
50.0
50.5 53.0
54.0
55.0
Item Description
50.0 Hand crank
50.5 Manual spring-charging port
50.6 Over-running coupling
50.0
50.5
50.6
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