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kana
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Kuala Lumpur
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Joined: 28-September 08
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Last Seen: 7th October 2008 - 01:02 AM
Local Time: Nov 22 2008, 07:10 AM
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28 Sep 2008
Hi,
How can we do power factor correction for an unbalanced load in a low voltage distribution system? Say, Line Voltage: 415V Phase A, I: 60A Phase B, I: 80A Phase C, I: 50A Pf: 0.75 lagging OR, is it a must to do load balancing before PFC can be applied? Kana
28 Sep 2008
Hi,
Is there any relation between the induction motor starting current and the reactive power drawn by the motor? I’m a bit confused here. I’m aware that by installing a reduced voltage starter the starting current of the induction motor can be reduced but there is a current spike while the changeover occurs in some electromechanical starters (ie star-delta or auto-transformer). Can this spike be eliminated by adding a capacitor in parallel? In some modern soft starter the term “energy saving” is used. What does this term refers to? Kana |
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