Page 233 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

CUT- OUT

The cut-out is an automatic device located between the dynamo and the battery. When the battery is discharged,
the cut-out connects the dynamo to the battery, but when the battery is fully charged, the cut-out isolates the
dynamo from the battery. In a cut-out, the primary (series) winding on a soft iron core is thick and has fewer turns,
while the secondary winding (shunt) is thin and has more turns.
One end of the primary winding is connected to the dynamo and the other end is connected to one end of
the secondary winding through a hinge. Secondary winding means the other end. The hinge has an armature
attached at the top, which is adjusted by a spring. CB with this armature. (contact breaker) points are installed.
C.B. One part of the point is connected to the armature and the other to the ammeter. The cut-out functions
similarly to an automatic magnetic switch. When the dynamo does not run, the C.B. The points are open, due to
which the connection between the battery and the dynamo is broken. When the dynamo runs, the current of the
dynamo goes to the primary and secondary windings and creates a magnetic field.

Now the current from the dynamo starts going to the battery through the ammeter, but this is possible only when
the dynamo is creating current according to the voltage of the battery.

Indicating device
The indicating device is fitted on the panel board of the vehicle. This device can be lamp type (warning lamp) or
gauge type, which is called ammeter. Ammeter displays the flow of current in two directions.
Alternator
Mechanical energy is converted into AC. Alternator or AC is a machine that converts electrical energy. Is called
alternator or AC generator. At present, alternator has started being used in place of dynamo in some engines,

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CITS : Automotive - Mechanic Diesel - Lesson 67 - 70