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Class 800 Mechanical Draft
Concrete ....etc

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Thank 4 showing me to study synchronize an alternator with infinite bus bar ....etc

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As the size and capacity of the transformer increased, the associated cooling arrangement become more powerful and sophisticated. So, by definition, the transformer cooling system is such arrangement for power transformers, which limits the generated heat into a safe value by means of proper dissipation of generated heat. Different cooling system is used for different types of transformers, and they are discussed as follows.

Generally, two types of transformers are there according to the use of insulating oil, namely Dry Type Transformers an ....etc

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THEORY:
The regulation of a 3-phase alternator may be predetermined by conducting the Open Circuit (OC) and the Sort Circuit (SC) tests. The methods employed for determination of regulation are EMF or synchronous impedance method, MMF or Ampere Turns method and the ZPF or Potier triangle method. In this experiment, the EMF and MMF methods are used. The OC and SC graphs are plotted from the two tests. The synchronous impedance is found from the OC test. The regulation is then determined at different power factors by ....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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http://seminarsprojects.net/Thread-microprocessor-based-alternator-synchronisation?pid=138

http://seminarsprojects.net/Thread-microprocessor-based-alternator-synchronisation?page=2

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http://seminarsprojects.net/Thread-microprocessor-based-alternator-synchronisation?pid=4382

http://seminarsprojects.net/Thread-m ....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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AIM:
To predetermine the regulation of three phase alternator by Potier and ASA methods and also to draw the vector diagrams.
FORMULAE USED:
Percentage regulation = Eo Vrated x 100 (For both POTIER & ASA methods)
Vrated
PRECAUTION:
(i) The motor field rheostat should be kept in the minimum resistance position.
(ii) The Alternator field potential divider should be in the position of minimum potential.
(ii) Initially all switches are in open position.
PROCEDURE FOR BOTH POTIER AND ASA MET ....etc

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Alternator excitation system
An excitation system for a brushless synchronous alternator contains an exciter having a stator which has first and second sets of field coils ,respectively coupled to a source of DC power and in series with polyphase AC output current generated by the main generator. Here, The base level of exciter field current is provided by the DC current supplied to the first set of field coils. a second variable amount of field current is provided by the AC output current supplied to the second set of field coils. a ....etc

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