Page 209 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

Table 5

Bobbin details

1 Type of bobbin.................Injection moulded/Built up
2 Bobbin material ..............Thickness.......mm.
3 Length of the bobbin L......mm, L1......mm, L2........mm.
4 Width of the bobbin W.......mm, W1.......mm, W2.........mm, W3......mm.
5 Height of the bobbin H .......mm, H1.......mm, H2.........mm

The same bobbin can be used if it is not damaged.

TASK 2 : Preparation of bobbin

1 Referring to the data taken in Table 5 and as per Fig 1, prepare the bobbin parts from a hylam/fibre sheet of
the same thinckness.

Bobbin parts of standard sizes are also avail- able in the market which can be assembled to form
the bobbin.

2 Assemble the parts of the bobbin as shown in Fig 2 which is given for your guidance.
3 Check the size of the assembled bobbin and verify it with the data taken and recorded in Table 5.

In the case of an injuction moulded bobbin it can be purchased from the market assuming it is of
standard size.

192

CITS : Power - Electrician & Wireman - Exercise 86