Why all voltage level are multiples of 11, like 220V, 440V, 1100V instead of 200V, 400V, 1000V?

9 Answers   Indian School of Mines,

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why we cannot protect 100% winding of an alternator by using differential protection?

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In HVDC LINE RECTIFIER CONTROL ON CONSTANT CURRENT AND INVERTER CONTROL CONSTANT EXITATION ANGLE CONTROL BUT HOW INVERTER CONTROL CONSTANT CURRENT?

0 Answers  

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HOW DOES THE FAN REGULATOR CONTROLS ITS SPEED

6 Answers  

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how Local Breaker Backup relay working?

1 Answers  

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How to find Cable size? Caterpillar generator produce (Two generators) 127*2=254 amp at 11 kv . What would be the cable size (XLPE) to supply 256 amp at 11 kv? Air or surrounding Temperature is 32 degree C. Cable will go under ground at 2.5 feet depth. Group Rating Factors is 3 cables. Clearance between cables is 7 cm. Soil Temperature (Ambient) 28o C Soil Thermal Resistivity is 1.2 K.m/W I would like to use 3 separate single core instead of using 3 core cable. Some says I should use three separate single core 120RM cables. Some says 70RM .some says 95. I m totally confused. Is there ant specific rule to determine cable size? What would be the LT cable size to flow 500 Amp current? Ifte My e mail address is ifte13@yahoo.com Anyone please send me the answer to my e mail address, i will be very glad.

1 Answers  

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resistance of transformer oil=?

1 Answers   HCL,

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plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

0 Answers  

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It is used or not HT cable single core 630 sqmm in LT 3 phase capacitor bank which is used in PCC(power control center).

1 Answers  

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WITCH CARDS IN USE IN FIRE CONTROL PANEL.

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can any tell me why slope 40% and 80% is calculated in differential protection?

0 Answers  

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How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

0 Answers  

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