Electrical load on power system varies and it never be constant. To economically meet the requirement of variable load and to assure continuous supply the number of generator unit connected to the system bus bar are varied suitably.

The synchronization requires fulfillment of various conditions like
(1) Same phase sequence
(2) Equality of frequency and voltage between incoming machine and bus.

At present the synchronization is done manually by using conventional analog instruments. The ....etc

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AIM
To conduct the load test on single phase alternator.
APPARATUS REQUIRED
PRECAUTION
1. The motor field rheostat should be kept in the minimum resistance position.
2. The alternator field potential divider should be in the minimum voltage position.
3. Initially all switches are in open position.
PROCEDURE
1. Note down the name plate details of motor and alternator
2. Connections are given as per circuit diagram.
3. The DPST is closed on supply side.
4. Using three point starter, the moto ....etc

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Show me december 2012 pay slip
jmjadjgtmeldajælgmatpmjmdajgptdwjgjad ....etc

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FUSE RATING:
(a)For Motor- 125% of rated current
= 125% of 17A=21.25A=25A
(b)For Alternator- 125% of rated current
=125% of 4A= 5A
THEORY:
In a salient pole alternator, the reactance of magnetic circuit along is along its quad stator axis. The alternator is driven by auxiliary prime mover at a speed slightly less than the synchronous speed under these conditions. The armature current is when the armature current mmf is in line with the field poles. The reactance by the magnetic field current is minim ....etc

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AIM :
To conduct a direct load test on a 3-phase slip ring induction motor and to draw the performance characteristics.
FUSE RATING-
FOR- STATOR- 125% 0f 7.5A = 10A
FOR ROTOR – 125% of 11A = 15A
THEORY:
Slip ring induction motor is also called as phase wound motor. The motor is wound for as many poles as the no. of stator poles and always wound 3-Ф even while the stator is wound two-phase. The other three windings are brought out and connected to three insulated slip-rings mounted on t ....etc

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Theory for brake test on a 3 phase induction motor
Pls try to provide this ..... ....etc

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AIM
To conduct load test on three-phase Slip Ring induction motor.
APPARATUS REQUIRED
PRECAUTION
The motor should be started without any load.
PROCEDURE
1. Connections are given as per the circuit diagram.
2. The TPST’S is closed and the motor is started using online starter to run at rated speed.
3. At no load the speed, current, voltage and power are noted down.
4. By applying the load gradually with the help of spring balance and brake drum arrangements.
5. The speed, current, voltage, po ....etc

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AIM
To conduct the slip test on three phase alternator and predetermination the regulation through vector diagrams
APPARATUS REQUIRED
PRECAUTION
1. The Motor field Rheostat should be kept in minimum resistance position.
2. The Alternator field should be kept open throughout the experiment.
3. The direction of rotation due to prime mover and due to the Alternator run as the motor should be same.
4. Initially all the switches are kept open
PROCEDURE
1. The name plate details of the motor an ....etc

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hi am vijina k, doing m-tech .i would like to get details on load test on 3 phase slip ring induction motor pdf including circuit diagram and sample graphs...... thanks in advance. ....etc

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Prepared by:GEO JOSE




Nomenclature
ks = value of plasticity corresponding to yield strength
kf = value of plasticity corresponding to fracture strength
σy= yield strength of work material
ε = shear strain
σ0, n = parameters of hardening
a = undeformed chip thickness
a1 = chip thickness
ξ = a1/a = chip thickness coefficient
α = tool rake angle
Φ = imaginary shear angle
N = normal force on tool rake face
F = fr ....etc

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