difference between high and low impedance BUS BAR relay??
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why the transformer connected like STAR- STAR, DELTA- DELTA, STAR- DELTA, DELTA-STAR ...? why these connections ,,, explain the advantages these connections?
what reason of line current and phase current in star connection and line current and phase current not equal in delta connection?
what is full form of google
Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???
what is the basic differnce between ground and earth
how can i design a APFCR panel? please explain with example..
What is d main advantage of using double circuit 3 phase transmission ?
why capacitor is placed in fan
what is the potential difference between line and earth?
My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I - is the value of AC fault current. t - is the operating time of disconnecting device in seconds. K – is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.
Does the total power means fundamental plus Harmonics?
How we can test the Smoke Detectors????