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Page Name: Synchronous Machines


Posted by: fine project uploader
Created at: Wednesday 14th of March 2012 12:12:19 AM
Last Edited Or Replied at :Wednesday 14th of March 2012 12:12:19 AM
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ent is flowing in the rotor winding which produces a rotating magnetic field within the machine
The rotating magnetic field induces a three-phase voltage in the stator winding of the generator
Equivalent Circuit_1
The internal voltage Ef produced in a machine is not usually the voltage that appears at the terminals of the generator.
The only time Ef is same as the output voltage of a phase is when there is no armature current flowing in the machine.
There are a number of factors that cause the difference between Ef and Vt:
The distortion of the air-gap magnetic field by the..................==> [ Click Here to Read More ]



Page Name: OPEN CIRCUIT AND SHORT CIRCUIT TEST ON SINGLE PHASE TRANSFORMER


Posted by: project helper
Created at: Saturday 22nd of December 2012 03:53:56 AM
Last Edited Or Replied at :Saturday 22nd of December 2012 03:53:56 AM
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OPEN CIRCUIT AND SHORT CIRCUIT TEST ON SINGLE PHASE TRANSFORMER





PROCEDURE

The connections are given as per the circuit diagram.
The DPST switch is closed.
The terminal (secondary) voltage of the transformer is adjusted to the rated value by varying the auto transformer.
The readings of all the meters are noted.



Short circuit test
PROCEDURE


The connections are given as per the circuit diagram.
The DPST switch is closed.
The terminal (secondary) current of the transformer is adjusted..................==> [ Click Here to Read More ]



Page Name: OPEN CIRCUIT SHORT CIRCUIT TEST ON A SINGLE PHASE TRANSFORMER


Posted by: project helper
Created at: Tuesday 30th of October 2012 07:21:02 AM
Last Edited Or Replied at :Tuesday 30th of October 2012 07:21:02 AM
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OPEN CIRCUIT & SHORT CIRCUIT TEST ON A SINGLE PHASE TRANSFORMER



PRECAUTIONS:
1. Auto Transformer should be in minimum voltage position at the time of closing & opening DPST Switch.




PROCEDURE:
OPEN CIRCUIT TEST:

1. Connections are made as per the circuit diagram.
2. After checking the minimum position of Autotransformer, DPST switch is closed.
3. Auto transformer variac is adjusted get the rated primary voltage.
4. Voltmeter, Ammeter and Wattmeter readings on primary side are noted.
5. Auto tran..................==> [ Click Here to Read More ]



Page Name: OPEN CIRCUIT TEST AND SHORT CIRCUIT TEST ON SINGLE PHASE TRANSFORMER


Posted by: project ideas
Created at: Tuesday 08th of May 2012 06:04:34 AM
Last Edited Or Replied at :Tuesday 08th of May 2012 06:04:34 AM
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c – Open Circuit current in Amps.
Short Circuit Test
4. Equivalent impedance referred to HV side ( Z02 ) = in Ohms
Where, Vsc – Short circuit Voltage in Volts
Isc – Short circuit current in Amps
5. Equivalent resistance referred to HV side (R02 ) = in Ohms
Where, Wsc – Short circuit Power in Watts
6. Equivalent reactance referred to HV side (X02) = Z02
2 - R02
2 in Ohms
7. Transformation ratio (K) =
Where, V1 – Primary voltage in Volts
V2 – Secondary Voltage in Volts
8. Equivalent resistance referred to LV side (R01) = in Ohms
9. Equivalent reactance referred to LV s..................==> [ Click Here to Read More ]



Page Name: OPEN CIRCUIT TEST AND LOAD TEST ON SEPARATELY EXCITED DC GENERATOR


Posted by: project ideas
Created at: Tuesday 08th of May 2012 06:00:39 AM
Last Edited Or Replied at :Tuesday 08th of May 2012 06:00:39 AM
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tor is switched off by using the DPIC switch after bringing all the rheostats to initial
position.
Load test
• Connections are given as per the circuit diagram.
• The Prime Mover is started with the help of the three point starter and it is made to run at rated
speed when the Generator is disconnected from the load by DPST switch..
• By varying the Generator field rheostat gradually, the Rated Voltage (Eg) is obtained.
• The Ammeter and Voltmeter readings are observed at no load condition.
• The Ammeter and Voltmeter readings are observed for different loads up to the rated c..................==> [ Click Here to Read More ]



Page Name: Synchronous Machines


Posted by: fine project uploader
Created at: Wednesday 14th of March 2012 12:12:19 AM
Last Edited Or Replied at :Wednesday 14th of March 2012 12:12:19 AM
open circuit characteristic on synchronous generator , 3 phase rotating magnetic field in synchronous machine ppt, generator field short circuit test , short circuit ratio of synchronous machine ppt, parallel operation of synchronous machines , short circuit test of synchronous generators, equivalent circuit of cylindrical synchrous generator , synchronous machine ppt, latest project topics m cs , synchronous machine project topics, isc result 2012 , synchronous machines ppt, calculation of equivalent circuit parameters of alternator , synchronous generator short circuit ratio,
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Synchronous Machines
Synchronous generators or alternators are used to convert mechanical power derived from steam, gas, or hydraulic-turbine to ac electric power
Synchronous generators are the primary source of electrical energy we consume today
Large ac power networks rely almost exclusively on synchronous generators
Synchronous motors are built in large units compare to induction motors (Induction motors are cheaper for smaller ratings) and used for constant speed industrial drives
Operation Principle
The rotor of the generator is driven by a prime-mover
A dc curr..................==> [ Click Here to Read More ]



Page Name: SION Vacuum Circuit-Breaker


Posted by: project expert
Created at: Saturday 21st of January 2012 03:05:07 AM
Last Edited Or Replied at :Saturday 21st of January 2012 03:05:07 AM
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SION Vacuum Circuit-Breaker For Standard Applications


SION Vacuum Circuit-Breaker - OEM Package 3. Product Features


Product Features


The slide-in module contains all necessary components for the circuit-breaker compartment of a panel.
Signals for the service and disconnected positions are transmitted to the module connector at the low-voltage interface of the vacuum circuit-breaker via the position switches of the drawout element.

Your Benefit


Easy integration in the panel.
The slide..................==> [ Click Here to Read More ]



Page Name: LOAD TEST ON 3-PHASE SQUIRREL CAGE INDUCTION MOTOR


Posted by: project report expert
Created at: Friday 29th of July 2011 04:55:10 AM
Last Edited Or Replied at :Monday 22nd of October 2012 12:12:17 AM
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AIM:
To draw the performance characteristics of 3-phase squirrel cage induction motor by conducting load test.
THEORY:
A 3-phase induction motor consists of stator and rotor with the other associated parts. In the stator, a 3-phase winding is provided. The windings of the three phase are displaced in space by 120º.A 3-phase current is fed to the 3-phase winding. These windings produce a resultant magnetic flux and it rotates in space like a solid magnetic poles being rotated magnetically.

..................==> [ Click Here to Read More ]



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