Page 212 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

8 Start the winding and complete atleast one layer to check whether the coil length is well within the bobbin as
in the original. If not, readjust the transverse feed.

Adjacent turns of the winding wire should not overlap or have a gap in between them. if incorrect,
readjust the feed

9 Start and ontinue the winding layer by layer providing the necessary in-between insulation and specified
number of turms in each layer as per data taken in Table 4.
10 After the designated number of turns are wound, solder the end lead and take it out through the bobbin flange
outlet.

If a coil has a number of taps of winding, never cut the wire. Instead fold the length into a long
loop and carry the wire to continue the winding. The looped wire can then be bared and connected
outside the coil.

11 After inspecting the primary winding, wrap the winding as shown in Fig. 9 with sufficient insulation according
to the data taken in Table 4.

12 Select a suiTable secondary winding wire as shown in the data taken in Table 4 and proceed as in steps 4
to 7.

The transformer may be provided with one or more secondary windings or tapped windings. In
such a case follow the data recorded and also refer to the connection diagram shown in step 12,
Task 1.

13 At the end of the winding, wrap and bind the insulation on the winding tightly.
Bindings must cover the winding fully and must be free of crease and must not project beyond the
coil disc (flange).

14 Inspect the coil for proper termination of lead and check the size by using a template and data taken in
Table 3.

15 Test the windings for continuity and short circuit.

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CITS : Power - Electrician & Wireman - Exercise 86 CITS : Power - Electrician & Wireman - Exercise 86