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 DC compound, shunt, and series motors; speed control of a DC shunt motor; load characteristics of a DC shunt generator; load testing of a 3-phase induction motor; open and short circuit tests on a transformer; measurement of power using the two-wattmeter method; magnetization characteristics of a DC separately excited generator; and applications of Thevenin's and Norton's theorems. Diagrams and notes are provided for each circuit.
E.C.M Lab Circuits Animated Research Electrical Electronics Engineering
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