Page 210 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

TASK 3 : Rewinding of transformer
1 Prepare/select a suiTable mandrel for the prepared bobbin as shown in Fig 3 or prepare a wooden block as
shown in Fig 4 depending upon the design of the winding machines.

2 Clamp the mandrel/wooden block in the winding machine.

See to it that while clamping the mandrel/ wooden block, under no circumstances the work becomes
loose during winding.

3 Fit the bobbin tightly to the mandrel of the winding machine with the help of fasteners as the bobbin must turn
along with the mandrel without play. (Fig 5).
4 Adjust the feed of the winding machine to suit the selected winding wire size by friction drive or by changing
the gear as shown in number 1 of Fig 6 and7.

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