If we want to change a contactor of faulty one what are the conditions want to fullfil

0 Answers   Qatar Shell,

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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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typically in power distribution substation. 1- Any idea how would be the graph of capacitor bank consumption verses time through the day . 2- How is the switching ( on and off ) of the capacitor bank, per need?

0 Answers   Siemens,

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1 KW = how many kva

4 Answers  

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is emf is indued if dc is passed through coil

5 Answers  

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why r we using vaccuum circuit breakers in the place of m.o.c.b.

1 Answers  

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what is the acceptable value of TAN DELTA and dissipation factor for 11kV, 1.75HP Motor?.

0 Answers  

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what is load cell

3 Answers   TATA, Wipro,

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what is the resultant phase shift in a 3 phase power system including neutral if on or more phases gets grounded or short circuited. kindly explain in detail for the reasons...

1 Answers   Enercon,

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Pleasd Tell Me..... In Generating Stations Why The Generation Of ELECTRICITY Is In 3 Phase Form?? OR In Generating Station Why We Generates The ELECTRICITY In The 3 Phase?? Why Not In The 4 Phase, 5 Phase Or 6 Phase Form??

3 Answers  

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Dear Respected sir how to test ABB REX521 protection relay by relay tester.

0 Answers  

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why HV test for cables?.why 0.7times?

1 Answers   Bosch, Prince Food Products,

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