Page 220 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 88 : Demonstrate Winding procedure

Objectives

At the end of this exercise you shall be able to:
• demonstrate collecting the armature winding data
• draw the winding diagram of small armature
• demonstrate small armature rewinding.

Requirements

Tools/Instruments Materials
• Electrician tool kit - 1 Set • 7 Mill millinex paper - as reqd.
• Insulated cutting pliers 200mm - 1 No. • 30 SWG super-enamelled copper wire - 300 g
• Scissors 150 mm - 1 No. • Empire sleeve 1mm, 2mm - 1 m each
• Mallet hardwood 0.5kg - 1 No. • Cotton tape 20mm - 1 m
• Soldering iron 25W, 125W, 240 V - 1 No. • Binding/hemp thread - 1 roll
• Tray 200 mm x 200 mm x 50 mm - 1 No. • Hylam/fibre wedge 2mm thick - as reqd.
• Scale with weights 1 to 450 g - 1 No. • 10 milli triplex paper - as reqd.
• Outside micrometer 0-25mm - 1 No. • V-32 insulation varnish - 1/2 litre
• Tweezer 100mm - 1 No. • Thinner - 1/2 litre
• Stand winder for armature - 1 No. • Resin core solder 60/40 - 20 g
• Power hack saw blade used - 1 No. • Resin flux (power type) - 10 g
• Centre punch 150mm - 1 No. • Air dry varnish - 1/2 litre
Equipment/Machines • Used hack saw blade - 1 No.
• Burnt out armature - 1 No. • Soldering paste - 10 g

Assumption: To facilitate easy approach, the procedural steps are for a mixer similar to Sumeet
make. However NIMI does not take any resopnsibility for the correctness of the specification given
in this information as the specifications are bound to change by the manufacturer from time to time.
Procedure

TASK 1 : Dismantle of armature from the body

1 Note the name-plate details of the given mixer in Table 1.
2 By turning the mixer upside down, make the position of the closing cover.
3 Dismatle the rubber bush and unscrew the fixing screw from the closing cover.
4 Trace the main supply lead and its connection to the internal parts.
5 Trace the internal connection from the field, armature, speed selector switch and draw the connection diagram.

Fig 1 is given for your guidance.

203

CITS : Power - Electrician & Wireman - Exercise 87