Direct Load Test on 3ph Squirrel Cage Induction Motor | With Graph | AC Machines Lab | Expt. No. 2

In this video I have shown, the Direct Load Test of 3ph Squirrel Cage Induction Motor along with the following characteristics:
1. Efficiency vs. Output
2. Power Factor vs. Output
3. Power Factor vs. Load Current
4. Speed vs. Torque
5. Slip vs. Torque

Chapters :
__________
00:26 - Introduction
01:28 - About measuring instruments
02:56 - Circuit diagram with virtual connection
04:40 - Making the connection
08:05 - Tachometer setting
08:45 - Starting the motor at no load
09:54 - Applyling 2 kg load
10:42 - Applyling 6 kg load
11:44 - Applyling 8 kg load
12:28 - Applyling 10 kg load
13:05 - Applyling 12 kg load
14:06 - Applyling 14 kg load
14:50 - Cooling the drum with water
15:03 - Releasing the brake drum & free running
15:44 - Stopping the motor
15:57 - Observation Table & Calculation
16:53 - What if wattmeter shows -ve reading
18:50 - Fully filled Observation Table
18:59 - Efficiency vs. Output Power Graph
19:04 - Power Factor vs. Outpur Power Graph
19:09 - Power Factor vs. Load Current Graph
19:14 - Speed vs. Torque Graph
19:19 - Slip vs. Torque Graph


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📎Important Links :
__________________
Theory Part : https://electricalnotebook.com/direct...
What to write in lab copy : https://electricalnotebook.com/direct...
Website : https://electricalnotebook.com/

🛠️ Instrument Used :
_____________________
1. Squirrel Cage Induction Motor : 2 HP, 415 V, 3 A, 1440 rpm
2. 1-ph Wattmeter : 0-750-1500-3000 W, 0-300-600 V, 0-5-10 A
3. 3-ph Power Factor Meter : 0.5 Lead - 1 - 0.5 Lag
4. Digital Multimeter (DMM) as Voltmeter : 0-750 V AC
5. Clamp Meter as Ammeter : 0-200 A
6. Non Contact Type Laser Tachometer : 0-50000 rpm
7. Water for cooling brake drum
8. Spring Balance : 0-50 kg



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Any kind of misuse and wrong connections make you hurt even lifeloss. So please think twice before operation.

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