Answer Posted / jagu

Transformer is independent of pf.Hence the transformer rating is always expressed in KVA.
In Motor the pf is dependent on percentage loading & hence expressed in KW.

upto how much low RPM we will run the commercial motor which is run through VFD without any problem occurs in motor.Motor rating Duty is S1 & RPM is 1400.

2211

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In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?

1755

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In vapour absorption refrigeration machine fluids used are

1303

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how to avoid Saturation in C.T?

2170

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As we use capacitior bank in 3ph ckt for improvement of PF, why not we use capacitor in single phase domestric use, at our house their are many inductive equipments,like fan,mixer,tube choke,air conditioner they also draw PF... by using capacitor can they improve PF. if yes--what are advantage and how to connect a capactor in single ph,and which type of capacitor if no- what are disadvantages.

1931

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what will happens if one phase is missing for 33/11kv power transfomer and why?

2713

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Define the term Capacitance and Inductance?

1170

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What the difference between three phase contactor (coil 110vac) & three phase SSR (control voltage 110Vac)? May I use contactor in place of SSR?

2206

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In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above

2115

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which type of cabel

2457

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HOW TO CALCULATE S/C,O/C,E/F OF ACB.

2634

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how we will deside the high voltage value

2035

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Explain the fundamental difference between emf (electro motive force) and pd (potential difference) ?

1203

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Can u tell me design of switch yard

2236

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What is inductance?

1278

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