Page 213 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

TASK 4 : Stacking of transformer cores (E & I)

1 Insert an ‘E’ lamination into the bobbin from both sides as shown in Fig 10a.
2 Place the right hand side (R.H.S.) laminations below the one inserted from the left hand side (L.H.S.).
3 Place an ‘I’ lamination to the free end of the L.H.S. ‘E’ piece as in Fig 10b.

4 Ensure that the slot in the ‘I’ is above the corresponding slot in the R.H.S. ‘E’ lamination.
The laminated assembly should be flush and lying flat.

5 Insert the second ‘E’ shaped laminations from the opposite side.

Ensure that it fits snugly against the bobbin.

6 Place an ‘I’ shaped lamination in position.

Ensure that it lies flat on the first “E” lamination.

7 Likewise insert the laminations alternately without any gap as shown in Fig 11.

Ensure that when all of the specified quantity of laminations are inserted, the assembly has the
right dimension, from loose laminations and correct interpolated laminations.

8 Fit both the top and bottom clamp plates on the assembly as in the original. (Figs 12a and 12b)

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CITS : Power - Electrician & Wireman - Exercise 86