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EE 1304 ELECTRICAL MACHINES LABORATORY - IIAIM:
To expose the students to the operation of synchronous machines and induction motors and give them experimental skill.
1. Regulation of three phase alternator by emf and mmf methods.
2. Regulation of three phase alternator by ZPF and ASA methods.
3. Regulation of three phase salient pole alternator by slip test.
4. Measurements of negative sequence and zero sequence impedance of alternators.
5. V and Inverted V curves of Three Phase Synchronous Motor.
6. Load test on three-phase induction motor.
7. No load and blocked rotor test on three-phase induction motor.
8. Separation of No-load losses of three-phase induction motor.
9. Load test on single-phase induction motor. 10. No load and blocked rotor test on single-phase induction motor.
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
In The Order We are Doing .....
1. Load test on single-phase induction motor .2. Load test on three-phase Squirrel Cage induction motor .3. No load and blocked rotor test on single-phase induction motor .4. No load and blocked rotor test on three-phase induction motor. 5. Regulation of three phase alternator by emf and mmf methods.
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
DPST
SWITCH
230V, 1 AC Supply
Fuse
FuseP
N
10A
10A
Aut
o T
rans
form
er(0
-260
) V
M1
M2
(0-10)A MI
(0-300)V MI
300V, 10A, UPF
Brake Drum
S1 S2
Kg Kg
Rotor
S1 S2
FUSE RATING:
125% of rated current
125 x 7.6---------------- = 9.5 A 100
NAME PLATE DETAILS:
Rated Voltage : 220V
Rated Current : 7.6A
Rated Power : 740WRated Speed : 1425 RPM
CIRCUIT DIAGRAM: Ex.No.1 LOAD TEST ON A SINGLE PHASE INDUCTION MOTOR
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
AM L
C V
V
TABULAR COLUMN:
S.No.Voltage
V (Volts)
CurrentI
(Amps)
Wattmeter Readings
W1 x(Watts)
Spring Balance Reading (S1 S2)
Kg
SpeedN
(rpm)
TorqueT
(Nm)
Output Power
Pm (Watts)
InputPower
Pi (Watts)
Efficiency%
S1(Kg) S2(Kg)
Circumference of the Brake drum = cm.
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
B
440V, 3, 50Hz,AC Supply
Fuse
FuseR
B
10A
10A
(0-10)A MI
600V, 10A, UPF
FuseY
10A
L1 A
L2 B L3 C
(0-600)V MI
600V,10A, UPF
Brake Drum
S1 S2
Kg Kg
Stator Rotor
TPST
SWITCH
Y
R
FUSE RATING:
125% of rated current
125 x 7.5---------------- = 9.37A 100
NAME PLATE DETAILS:
Rated Voltage : 415V Rated Current : 7.5A Rated Power : 3.7 KWRated Speed : 1430 RPM
CIRCUIT DIAGRAM: Ex.No.2 LOAD TEST ON A THREE PHASE SQUIRREL CAGE INDUCTION MOTOR
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
C V
M L
AM L
C V
V
Sta
r D
elta
Sta
rter
Sta
rt –
YR
un -
TABULAR COLUMN:
S.No.Voltage
V (Volts)
CurrentI
(Amps)
Wattmeter Readings
Spring Balance Reading (S1 S2)
Kg
SpeedN
(rpm)
Slip%
TorqueT
(Nm)
Output Power
Pm (Watts)
InputPower
Pi (Watts)
Efficiency% W1 x
(Watts)W2x
(Watts)S1(Kg) S2(Kg)
Circumference of the Brake drum = cm.
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
S1 S2
FUSE RATING:
125% of rated current
125 x 7.6---------------- = 9.5 A 100
NAME PLATE DETAILS:
Rated Voltage : 220V
Rated Current : 7.6A
Rated Power : 740WRated Speed : 1425 RPM
CIRCUIT DIAGRAMS: Ex.No.3 NO LOAD AND BLOCKED ROTOR TEST ON SINGLE PHASE NDUCTION MOTOR
NO LOAD TEST:
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
300V, 10A, LPF
A
(0-10)A MI
(0-300)V MI
V
Fuse
10A
M L
C VDPST
SWITCH
230V, 1 AC Supply
Fuse
P
N
10A
Aut
o T
rans
form
er(0
-260
) V
M1
M2
Rotor
DPST
SWITCH
230V, 1 AC Supply
Fuse
FuseP
N
10A
10A
Aut
o T
rans
form
er(0
-260
) V
M1
M2
(0-10)A MI
(0-150)V MI
Brake Drum
S1 S2
Kg Kg
Rotor
S1 S2
FUSE RATING:
125% of rated current
125 x 7.6---------------- = 9.5 A 100
NAME PLATE DETAILS:
Rated Voltage : 220V
Rated Current : 7.6A
Rated Power : 740WRated Speed : 1425 RPM
150V,10AUPF
BLOCKED ROTOR TEST:
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
AM L
C V
V
440V, 3, 50Hz,AC Supply
Fuse
FuseR
B
10A
10A
FuseY
10A
TPST
SWITCH
B
(0-10)A MI
600V, 10A, UPF
(0-600)V MI
600V,10A, UPF
Stator Rotor
Y
R
B
FUSE RATING:
125% of rated current
125 x 7.5---------------- = 9.37A 100
NAME PLATE DETAILS:
Rated Voltage : 415V Rated Current : 7.5A Rated Power : 3.7 KWRated Speed : 1430 RPM
CIRCUIT DIAGRAMS: Ex.No.4 NO LOAD AND BLOCKED ROTOR TEST ON THREE PHASE INDUCTION MOTOR
NO LOAD TEST:
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
C V
M L
AM L
C V
V
Y
R
440V, 3, 50Hz,AC Supply
Fuse
FuseR
B
10A
10A
FuseY
10A
TPST
SWITCH
B
(0-10)A MI
600V, 10A, UPF
(0-600)V MI
600V,10A, UPF
Stator Rotor
Y
R
B
Brake Drum
FUSE RATING:
125% of rated current
125 x 7.5---------------- = 9.37A 100
NAME PLATE DETAILS:
Rated Voltage : 415V Rated Current : 7.5A Rated Power : 3.7 KWRated Speed : 1430 RPM
BLOCKED ROTOR TEST:
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
C V
M L
AM L
C V
V
Y
R
THREE POINT STARTER
A2
(0 – 600)VMI
X 2
+
(0-10) AMI
_
V
F2
+
TPST
SWI
NAME PLATE DETAILS: Motor Alternator Rated Voltage : 220V 415V Rated Current : 27.5A 7A Rated Power : 5.2KW 5KVA Rated Speed : 1500 RPM 1500 RPM
CH
A
A
X 1
NAME PLATE DETAILS:
Motor Alternator
Rated Voltage : 220V 415V Rated Current : 27.5A 7A Rated Power : 5.2KW 5KVARated Speed : 1500 RPM 1500 RPM R
CIRCUIT DIAGRAM: Ex.No.5 REGULATION OF THREE PHASE ALTERNATOR BY EMF AND MMF METHODS
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
300
Ω /
0.8
A
FUSE35A
_
220 V D.C.SUPPLY
1200Ω1.2 A
(0-2) A MC
R
YB
F1 A1
L F A
FUSE35A
FUSE
FUSE
FUSE
M
220 V D.C.SUPPLY
TABULAR COLUMNS:
EMF METHOD:
S.No. LoadI
(Amps)
Resistive Load Inductive Load Capacitive Load
Eo (Volts) % R Eo (Volts) % R Eo (Volts) % R
MMF METHOD:
S.No. LoadI
(Amps)
Resistive Load Inductive Load Capacitive Load
If
(Amps)Eo (Volts) % R
If
(Amps)Eo
(Volts)% R
If
(Amps)Eo
(Volts)% R
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING, SMKFIT
