...
Monday, 21 October 2013
00:09
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Normal
0
false
false
false
MicrosoftInternetExplorer4
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font-family:"Times...
Sunday, 20 October 2013
23:20
No comments
Normal
0
false
false
false
MicrosoftInternetExplorer4
/* Style Definitions */
table.MsoNormalTable
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Saturday, 19 October 2013
01:10
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Because of fault there is a unbalance condition in the three phase stator currents and because of these unbalance currents dual frequency currents starts flowing in rotor core. these dual frequency currents heats up rotor and harms rotor. due to same unbalance currents damage of stator also takes place.
Negative arrangement channel furnished with the over current relay is utilized for the insurance against unbalance loading....
00:29
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Normal
0
false
false
false
MicrosoftInternetExplorer4
/* Style Definitions */
table.MsoNormalTable
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mso-pagination:widow-orphan;
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font-family:"Times...
Friday, 18 October 2013
23:48
No comments
Normal
0
false
false
false
MicrosoftInternetExplorer4
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mso-pagination:widow-orphan;
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Tuesday, 8 October 2013
08:02
No comments
There are some sentences which are very common in use with common mistakes.
RIGHT WRONG
1.) READ OUT ...
Thursday, 3 October 2013
01:16
No comments
Ransach: Hello.
Kat : Hello. Is mike there?
Ransach: I'm sorry. He's not here right now.
Kat: What time will he be back?
Ransach : Around Two thirty.
Kat: This afternoon?
Ransach : Yes. May I ask who's calling?
Kat: This is his friend, pappu.
Ransach: Okay. I'll tell him you called.
Kat : Thank...
Monday, 30 September 2013
07:39
No comments
Harmonics: Enemy of true sinusoidal wave
In a perfect power system, the voltage supplied to user, and the supplied load current are exactly sine waves. In practice, notwithstanding, conditions are never perfect, so these waveform are sometimes distorted. This deviation from ideal sinusoidal waveform is expressed as harmonic distortion of voltage and current waveform.
Harmonic signals are integer multiple of fundamental frequency...
Sunday, 29 September 2013
07:07
No comments
Power Factor is a measure of how productively electrical energy is utilized. The perfect Power Factor is
solidarity, or one. Anything less than one, (or 100% productivity), implies that additional force is instructed to attain the true errand nearby. This additional power is regarded as Reactive Power, which tragically is important to give a magnetizing impact needed by machines and other inductive loads to...
Tuesday, 13 August 2013
21:19
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Principle of DOL starter:
A Direct-On-Line (DOL) starter is an electronic 3-phase control framework which offers delicate begins in DELTA conneection. DOL starters are presently replacing the utilization of manual or semi automatic "star-delta" starters. In the beginning of a 3-Phase Induction motor, full line voltages are connected to the motor through contactors. The DOL is these days the most widely recognized sort of 3-Phase starter...
03:01
1 comment
Starters for Three Phase Induction Motors:
There are many types of starters used for starting three phase induction motors depending upon size of motor and the work for which motor is used. Starter selection also depend upon construction of the motor. due to advancement in electronic control, electronic starters are also very famous now a days. process type and working conditions are also considered in starter selection.
There are basically...
Sunday, 11 August 2013
00:12
1 comment
PROTECTION OF THE GENERATOR DUE TO UNBALANCE LOADING:
Because of fault there is an imbalance in the three phase stator currents and because of these irregularity flows, twofold frequency currents are impelled in the rotor center. This reasons the over warming of the rotor and therefore the rotor harm. Uneven stator currents likewise harm the stator. Negative sequence relay furnished with the over current relay is utilized for the assurance...
Saturday, 10 August 2013
23:47
No comments
Over voltage Protection:
Over voltage happens in light of the increment in the speed of the prime mover because of sudden loss in the burden on the generator. Generator over voltage does not happen in the turbo generator in light of the fact that the control governors of the turbo generators are extremely touchy to the speed variety. Anyway the over voltage insurance is needed for the hydro generator or gas turbine generators. The...
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