Answer / k.prakashchandra

Unity pf means pf is one. As the current is in phase with
the voltage in resistive load ,the pf is one as the angle
between them is zero.

Answer / momenkasiu

Unity power factor means that Pf=1 or cos(phi)=1 so (phi)=0 where (phi) is the angle between the apparent power & active power in the power triangle so it means that the apparent power equals the active power and the reactive power in this case equals zero. No reactive power transmitted between the source and load which it exists only in the case of resistive loads.

What is main cause of cable's terminal point burned in Lug on high temperature although lug and cable selection is ok as per stantard and also tightness is ok as per situation. so please take in deep and tell correct answer thanku.

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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Why does The speed of motor used in elevator remain constant irrespective of load??

1 Answers  

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why not phase to phase fault occure in raining day in hv sub-station?

1 Answers   Getco,

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If DC supply is given to a transformer it may a) Work b)Not Work c)Give lower voltage than the rated voltage on secondary side. d)burn the winding

12 Answers   wbsedcl,

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what condition there autotransformer will fail?

2 Answers  

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lenz law application and define

0 Answers  

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why we do not switched on capicitor panel with DG Supply

3 Answers   DLF,

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For two systems transmitting the same amount of real power, the system with the lower power factor will have higher circulating currents due to energy that returns to the source from energy storage in the load.???

0 Answers   Bhel,

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what is the operating time for LBB and how does the LBB relay realise whether cb is opened or not?

0 Answers  

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what is the formula or method to calculate RESIDENTIAL,COMMERCIAL & INDUSTRIAL load power?????

3 Answers   RRB,

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can we done C.T.sc at output? if yes y,if no y?

3 Answers  

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