Page 275 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

TASK 7:

1 Dismantle the ceiling fan.
2 Identify the parts.
3 Draw the circuit diagram.
4 Draw the neat sketch of the fan.

5 Check the windings of the fan with multimeter.
6 Measure the resistance of the windings.
7 Identify the starting and running winding.
The starting winding is having comparatively higher resistance.
8 Trace the internal connections of the ceiling fan.

9 Rectify the fault of the fan, if any. Refer pedestal fan trouble shooting points.
10 Re assemble the fan.
11 Check the working of the fan.

TASK 8:
1 Draw the circuit diagram.
2 Draw a neat sketch of mixer.
3 Specify the mixer.
4 Test the mixer with series test lamp.

5 Dismantle the mixer if not working.
6 Check the armature by using growler.
7 Check the field winding with test lamp.
8 Check the insulation resistance between windings and body.

9 Improve the insulation value by heating or varnishing, if the insulation value is less than one megohm after
cleaning thoroughly the stator and armature and bush bearings.
10 Rectify the faults and repair it if necessary.

11 Check the brushes for its condition.
12 Replace if required.
13 Check the brushes for sufficient pressure.
14 Check the bush for any play.
15 Reassemble the mixer properly.

258

CITS : Power - Electrician & Wireman - Exercise 101