Answer / bhagya

WE CAN DEVELOP 3PH POWER WITH 86% EFFICIENCY BY THE USE OF 2
INDIVIDUAL 1PH T/F.BY THE CONCEPT OF OPEN DELTA

Answer / guest

by phase shifter

last week we did the REF relay test by closing single pole (R phase) of CB and apply 380V at the primary of delta transformer. we get 33A at the primary of the R phase star end. but we get 380A at both R an B in delta side. how and why?

1 Answers   Siemens,

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what is the difference b/w winding insulation class and winding temperature class?

6 Answers   Bhel, NDPL, NTPC,

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how to select rating of HT Panel

0 Answers  

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how could we calculate the no of outgoings from a 800 watt distribution board

0 Answers   United Engineering,

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What is the formula to calculate a three phase alternator

0 Answers  

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electrical engineering giving priority for insulators rather than conductors, why ?

5 Answers  

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if 11 lead acid batteries each 200 amph are connected in series so that combinly they can produce 110 volts dc. question is how much backup it can provide ? 2) how can we calculate that how much amprere and voltage is required to charge them . thanks in advance !

1 Answers  

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Difference between earthing & grounding.?

3 Answers   ABB,

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how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO (current operating)?

0 Answers   SISL,

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need to make a report. Need to choose a 3phase induction motor. Load conditions motor will operate in : Maximum Load: 30 Kw Speed: 2950 rpm Ambient temp: 20 cent Supply voltage: 440V Frequency: 50Hz need to look for the safety factor when choosing the motor, went through catalouge found a few, but dont know how to choose the safety factor allowing an extra load something above 30 KW to avoid any harm.

0 Answers  

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What is Single Phasing fault???(not single-phase fault)

6 Answers   ABB,

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if we convert Ampers into kva,which one formula use by us,pls tell me?

10 Answers   ABB,

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