Page 229 - CITS - Electrician - Trade Practical
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ELECTRICIAN - CITS
14 Apply thinner to the armature slots and winding to thin down the varnish.
15 Remove the fibre/Hylam wedges from the armature slots.
TASK 2:
1 Count the coil pitch and record it.
2 record data of stator, viz wire gauge, no of turns, coil pitch, coils/slot, no of slots, no of total coils, coil connection
and pole connection. Sample of single phase motor with 24 slots, 20 coils is given here.
Main winding Starting winding
Coil pitch 5,3,1 5,3
Coil throw 1-6,2-5,3-4 1-6,2-5
No of coils 12 8
No of slots 24
Coil connection – End to End (whole coil)
Reference winding diagram
3 Strip the old winding from stator slot, use heating by blow lamp If necessary
4 Measure size of wire, dimensions of coil.
5 Clean the slots, (for damges sand blasting may be required).
6 Measure the weight of the discarded winding.
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CITS : Power - Electrician & Wireman - Exercise 90
