Reference Learning Outcome :- Plan, Execute commissioning and evaluate performance of AC motors. (Mapped NOS: PSS/N1709) Execute testing, and maintenance of AC motors and starters. (Mapped NOS: PSS/N1709)
Duration :- Professional Skill 80 Hrs; Professional Knowledge 26 Hrs (for above learning out come)
Different types of starters for three phase induction motors, its necessity, basic contactor circuit, parts and their functions.
TRADE PRACTICAL (Professional Skills With Indicative Hours) :- Job no. & Name of the Practical
123. Identify parts and terminals of three phase AC motors. (5 Hrs.)
124. Make an internal connection of automatic star-delta starter with three contactors. (10 Hrs.)
125. Connect, start and run three phase induction motors by using DOL, star-delta and auto-transformer starters. (17 Hrs.)
126. Connect, start, run and reverse direction of rotation of slip-ring motor through rotor resistance starter and determine performance characteristic. (13 Hrs.)
WEEK. NO. 11 & 12
Reference Learning Outcome :- Plan, Execute commissioning and evaluate performance of AC motors. (Mapped NOS: PSS/N1709) Execute testing, and maintenance of AC motors and starters. (Mapped NOS: PSS/N1709)
Duration :- Professional Skill 80 Hrs; Professional Knowledge 26 Hrs (for above learning out come)
TRADE THEORY (Professional Knowledge ) :-
Single phasing prevention.
No load test and blocked rotor test of induction motor.
Losses & efficiency.
Various methods of speed control.
Braking system of motor.
Maintenance and repair.
TRADE PRACTICAL (Professional Skills With Indicative Hours) :- Job no. & Name of the Practical
127. Determine the efficiency of squirrel cage induction motor by brake test. (05 Hrs.)
128. Determine the efficiency of three phase squirrel cage induction motor by no load test and blocked rotor test. (05 Hrs.)
129. Measure slip and power factor to draw speed-torque (slip/torque) characteristics. (10 Hrs.)
130. Test for continuity and insulation resistance of three phase induction motors. (5 Hrs.)
131. Perform speed control of three phase induction motors by various methods like rheostatic control, autotransformer etc. (10 Hrs.)