draw the full wave and half wave circuit of 3 phase system and inverter circuit used in ups 

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What is tan delta & PPM in transformer? and whats its IS value?

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In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

0 Answers   PPIL,

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i need to connect fact device(any one from following upsc,sssc,svc,statcom and tcsc)in 14 bus system....by using MATLAB psat software....if i connect these fact devices,i will get some error as "virtual error"...i cnt rectify this error.if anybody know that how to work in psat,pls help me to rectify this error.... or send mail me to, viki0607@yahoo.co.in

1 Answers  

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How to select AC3 duty contactor for DOL & Star-Delta starters

1 Answers  

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how the voltage between all the three phase is zero can any body explain me

5 Answers  

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What is the main feature of v/f control?

1 Answers  

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why transformer rating is in KVA?

4 Answers   ABB,

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Suppose am having the PF value .8, so how can we say that is it lagging or leading?

11 Answers   Bhel,

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what is single phase motor?

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What are the uses of lead compensator?

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Why Phase to Neutral get spark

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