Page 221 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

Table 1

Data Sheet
Make ............... Type....................

KW....................... Volt ................... Amp............... No. of poles...................

R.p.m................. Frame............. Model.......................

Wt.
Size of No. of Coil Coils/ Wt. of No. of No. of
Rotor of the Remarks
wire Turns Pitch Slot one coil slots commutator
winding

Centre of slots.
to
Centre of bars
Centre of mica

Commutator
Pitch
Lap Wave

6 Remove the top cover screw which is fitted in the inner side of the body of the mixer.
7 Remove the top cover of the mixer.
8 Remove the coupling pulley

9 Disconnect the main supply lead and inner leads from the speed selector swich terminals.
10 Remove the motor from the plastic cover assembly
11 Remove the carbon brushes.
12 Mark the position of the bottom cover and the body for the mixer with the help of a centre punch.
13 Loose the through machine screw and remove the bottom cover.

14 Remove the fan blade from the armature shaft.
15 Remove the armature out of the stator

TASK 2: Collect and record the armature datas
1 Check visually the armature for fault symptoms and then by an external growler.
2 Note down your findings in Tables 1 under symptoms of defects

3 Place the armature in the winding stand. Count the number of slots, number of segments and record in
Table 1.
4 Draw the developed diagram with the help of the data obtained.

204

CITS : Power - Electrician & Wireman - Exercise 88