If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

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can we apply kirchhoff's laws to circuits containing non linear elements?

3 Answers   Metro,

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where the lexical paramater will use in fron end?

0 Answers  

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how do u calculate CT rating for 10 mva transformer

2 Answers   Enercon,

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Why iron core transformers not used in high frequency applications ?

3 Answers  

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How to calculate loses in transformer of 160 KVA ?

0 Answers   IDV,

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what is difference between RCB,RCCB &RCBO?

3 Answers   ABB,

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Can Induction motor run at over rated speed? ( 15oo rpm is rated speed for 50HZ. is it possible to ride 3000 RPM with same motor with the help of VVVFD for continues ride of 100HZ)

3 Answers   Equate,

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why overload relay is not tripped at time of starting of motor allthough staring current is too high?

5 Answers   TATA,

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in thermal overload relay class 10A indicate what

6 Answers   Reliance,

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control & auxilary circuits used for circuir breakers

0 Answers  

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Can earth resistance be measured without connecting the earth electrode? and should earthing connections be disconnected What is the effect of connecting two cables of different sizes in parallel with supply? Thanks in Advance. I am intrested to get in touch with some tecnocrats/engineers,my mail i.d is : hiremathvijay@rediffmail.com

1 Answers  

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