What is the need for a controller?

0 Answers  

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why we measure ouput of transformers in kva.

1 Answers  

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What happens with squirrel induction machines if the ends of rotor conductors are kept open? Explain

5 Answers  

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following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?

0 Answers  

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define reluctance motor & its operation ?whether its operating single phase or three phase ?

1 Answers  

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why different series of vfds (like allenbradley)are used in industry ?

0 Answers  

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How we calculate the average power factor if the one phase is lag and another one is in lead?

1 Answers   DigiTech, MCR,

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What is the principle of residual protection?

0 Answers  

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what are the uses and applications of rectifiers?

3 Answers  

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In motors how many types of cooling systems were used?

0 Answers   NTPC,

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what is the Pickup/drop off ratio in BCPU relays

0 Answers   DNJ Energy LLC,

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how LT meggar works

1 Answers   Essar,

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