How many types of Transformer testing..

1 Answers  

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in ct secondary one terminal is connected to earth why?

1 Answers  

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why generation voltages are 6.6kv or 11kv and why not some one give that stander that generation voltages are 5kv or 12kv?

1 Answers   AES,

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what is the purpose of the armored for the power Or control cable? How to select the type of the armored?

1 Answers   Siemens,

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why do we not use equivalent voltage source in negative sequence equivalent ckt.

0 Answers   TATA,

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Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?

0 Answers  

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in CNC reference how to take? what kind of input give to the servo amplifier?

1 Answers  

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if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.

0 Answers  

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how to design the heater in temperature control unit to heat 50KL of water?

0 Answers   SunMax,

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how the phase convertor changes the no. of phases

0 Answers  

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what do you mean by 1 ton in AC`s

36 Answers   Bhel, Bosch, ITC Infotech,

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1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

0 Answers  

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