If single phase voltage level is 230V than why three phase
voltage level is not 660V ?, but it is only 440V.
Answers were Sorted based on User's Feedback
Answer / mukesh
it is not a three phase voltage is three times the single phase voltages. we only take a voltage between two points not between three points. so when we measure voltage between two points in single phase system there is one of its point at higher potential and other is at zero potential(reference point). but in the three phase system if we take a reference point and measure voltage between them (between reference and higher potentials) and adds up algebraically we got a voltage 400 v. if we also measure voltage between two higher potential we got 400v due to the wave forms of phases reaches at potentials according to time. but this not happens that both the voltage reaches at higher vale in the same instant. so its never been 660 v....
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / percy
3 phase doesnot means 230+230+230
in three phase three lines carry same voltage but displaced
in time by 120* that is we obtain V (L-L)=400kv
Is This Answer Correct ? | 25 Yes | 37 No |
Answer / dragon heart
because of the power generated from the 3 phase transformer
connected in Y
Is This Answer Correct ? | 5 Yes | 22 No |
Answer / hemantpandey
because
single phase =phase voltage /square root of three
and the other reason is that the two terminals
Is This Answer Correct ? | 8 Yes | 26 No |
Answer / kumar
our measering meater is have only two terminal that y 400v
Is This Answer Correct ? | 14 Yes | 44 No |
explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.
0 Answers MPPGCL Madhya Pradesh Power Generating Company Ltd,
As we know that during saturation test of CT from secondary side, the current in secondary shoots up after core saturation. How core saturation effects the secondary current?
open circuit test when performed on double the voltage & double the freq, then what will happen with p.f and current magnitude?
does a DG set has low fault level as compared to that of a transformer.If yes then why.
we have a rewind motor of 2Hp,2800Rpm, 220Volt AC. how can we choose the running capacitor for this motor, any formula for that?
Which type of transformer used in lighting load?
What is the difference between electrical earthing and electrical grounding?
Brief function of stepper motor
As we know induction squirrel cage motor torque Directly praprortinal to applied voltage in star connection & delta also. If I connect 55KW Motor to DOL starter in load condition does motor withstand the load & what will be the current withdrawn ? motor will not fail ?
how to check a transformer insulation?
3 Answers Kirloskar, Kirloskar Chillers,
what is meant by 2 within a star in a voltmeter dial?
IN dc capacitive reactance is??