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This document presents 10 electrical and electronics laboratory circuits explored and researched by Mohammed Imran, Assistant Professor of Electrical and Electronics Engineering, along with contributions from 4 mechanical engineering students. The circuits include brake tests on different types of DC motors, speed control of a DC shunt motor, load testing of a 3-phase induction motor, open and short circuit tests on a transformer, power measurement using the two-wattmeter method, and experiments exploring Thevenin's and Norton's theorems. Diagrams and brief descriptions are provided for each circuit.
Corrected1
- 1. E.C.M LAB CIRCUITS (ANIMATED) RESEARCHED AND PRESENTED BY- Mohammed Imran ( ASSISTANT PROFESSOR) DEPARTMENT OF ELECTRICAL AND ELECRONICS ENGINEERING CONTRIBUTIONS BY- -Abrar Rafat (MECHANICAL 2nd year) -Syed Ateeq (MECHANICAL 2nd year) -Zia Ul Haq (MECHANICAL 2nd year) -Mohammed Maqsood (MECHANICAL 2nd year)
- 2. 1.BRAKE TEST ON DC COMPOUND MOTOR 220 V, D.C. SUPPLY BRAKE DRUM S1 S2 DPST DPST FUSE FUSE V A Z ZZ YY Y M AA A 4 POINT STARTER L Z 0-300V,M.C. 0-20A,M.C. L - A NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD
- 3. 2.SPEED CONTROL OF DC SHUNT MOTOR 220 V, D.C. SUPPLY DPST DPST FUSE FUSE A M 3 POINT STARTER L Z A 515 Ω min V A AA Z 100 Ω Max. 0-300V,M.C. 0-5A,M.C. ZZ NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD
- 4. 3.BRAKE TEST ON DC SERIES MOTOR 220 V, D.C. SUPPLY BRAKE DRUM S1 S2 FUSE FUSE V A YY Y M AA A 2 POINT STARTER L A 0-300V,M.C. 0-20A,M.C. + - DPST DPST NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD
- 5. 4.BRAKE TEST ON DC SHUNT MOTOR 220 V, D.C. SUPPLY DPST DPST FUSE FUSE A M 3 POINT STARTER L Z A ZZ V 0-300V,M.C. S1 S2 BRAKE DRUM 0-15A,M.C. A Z AA NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD 100ohms min
- 6. 5.LOAD CHARCTERISTIC OF DC SHUNT GENERATOR 220 V, D.C. SUPPLY FUSE FUSE M 3 POINT STARTER L Z A ZZ A AA G A AA A ZZ A V Z Z L O A D 0-2A,M.C. 0-20A,M.C. 0-300V M.C. DPST DPST NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD 100Ω MAX
- 7. 6.LOAD TEST ON 3-PHASE INDUCTION MOTOR 3 phase 415 v supply R Y B N STAR/DELTA STARTER R Y B A V 0-10,M.I 5/10 A,300/600 upf fuse fuse fuse TPST TPST TPST Brake drum S1 S2 NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD 0-600v,M.I
- 8. 7.OPEN AND SHORT CIRCUIT TEST ON A TRANSFORMER A V OPEN CIRCUIT M L C V 1- phase A.C supply A V SHORTCIRCUIT M L C V 1- phase A.C supply fuse fuse fuse fuse 0-300v, MI 0-1A, MI 0-15A,MI 0-75V, MI AUTO TRANSFORMER HIGH VOLTAGE RATED AUTO TRANSFORMER HIGH CURRENT RATED PH DPST DPST DPST DPST N PH N L1 L2 H1 H2 L1 L2 H1 H2 2.5/5A,150/300V lpf 15/30A,75/150V upf Red Common mistakes
- 9. 8.MEASUREMENT OF POWER BY TWO WATTMETER METHOD 3 phase 415 v supply R Y B STAR/DELTA STARTER R Y B A V 0-10,M.I 5/10 A,300/600 upf fuse fuse fuse TPST TPST TPST Brake drum S1 S2 NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD 0-600v,M.I M C V L L 5/10 A,300/600 upf V M C 600 600
- 10. 9.MAGNETISATION CHARACTERISTICS Of DC SPEARATELY EXCITED GENERATOR V 220v Dc supply FUSE FUSE FUSE FUSE DPST DPSTDPST DPST 3 POINT STARTER L Z A M G A SPST 220v Dc supply 0-1 A,M.C 0-300V,M.C ZZ Z ZZ Z A AA A AA 1000 Ω /A Max. NOTE:- 1. RED common mistakes 2. FUSE RATING WILL BE 125% OF FULL LOAD 100 Ω min
- 11. 10.THEVENINS THEOREM 230 V,1Phase,A.C Supply DPST DPST R P S 0-30V R 1 R 2 R 3 Vth R L Circuit to find Vth A B
- 12. R1 R2 R3 RL Circuit to find Rth Rth
- 13. 230 V,1`-Phase,A.C Supply DPST DPST R P S 0-30V R 1 R 2 R 3 A B A I load Rl
- 14. NORTONS THEOREM 230 V,1Phase,A.C Supply DPST DPST R P S 0-30V R 1 R 2 R 3 ISC R L Circuit to find Isc A B A
- 15. NORTONS THEOREM R1 R2 R3 RL Circuit to find RN Rn
- 16. NORTONS THEOREM 230 V,1-Phase,A.C Supply DPST DPST R P S 0-30V R 1 R 2 R 3 R L Circuit to find IL A B A D.R.B I load
Editor's Notes
- #9: Fuse