Page 170 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

TASK 2: Record the name plate details

1 Note down the name plate details of the 3Ф Squirrel Cage Induction Motor and slip ring induction motor.

TASK 3: Measurement of starting current & running current
1 Connect the motor as per diagram for starter 1
2 Trace the connections of power and control circuits.
3 Set the over load relay current.

4 Switch on the ICTP.
5 Start the motor by pressing the start button.
6 Measure the starting current and running current.
7 Switch OFF the motor by pressing the stop button.
8 Switch off the supply and disconnect.

9 Repeat steps 1 to 2 for starers 2 to 6 as in Table 1
10 Tabulate currents in Table 1
Table 1

Sl.No Starter Starting current (A) Nol load running current (A)
1 DOL

2 Semi-automatic star delta
3 Automatic star delta
4 Manual star delta

5 Rotor resistance starter
6 Auto transformer starter

153

CITS : Power - Electrician & Wireman - Exercise 70