If single phase voltage level is 230V than why three phase
voltage level is not 660V ?, but it is only 440V.

Answer Posted / jawad 923218471617

that is where frequency does matter, because with frequency one of the three phase become neutral after a timeperiod. so for that reason at a moment two phases are showing 440v in pakistan).

Is This Answer Correct ?    4 Yes 4 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how we findout a ignater is faulty or not?

1590


When semiconductor fuse does save thyristor in each cycle of conduction? Why under voltage setting keep less in SPRS and more in DC drive?

1631


What is Percentage impedence of a transformer? why it is expressed at a percentage? what is the importance of percentage impedence in case of a transformer?

1430


What is ferro-resonance in electrical system? Why it occurs and what are measures to prevent it?

1762


bsnl tta exam question

1458






What is current & voltage ? Voltage perform at any load without current or not?

1371


what are the main faults that occur in stabilizers? How they corrected and resolved ? Types of stabilizers ?

1580


Load break swicth maintenance procedure.

1316


When can we take Neutral as common neutral link?

1212


how to select the isolation tranformer for siemens 802dsl cnotroller

1596


what is the effect of change in supply frequency on load angle of synchronous motor,all other parameters remaining same?

1897


when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

1263


how you taken aotitude test

2026


thyristor controlled APFC panel design parameter?

1353


What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

1581