Answer / pradhyumn

These are the battery chargers are mainly used for charging
the battery bank which is responsible for control supply of
control systems such as breaker closing coil, trip coil,
protection relays etc.
**In float charging battery is charged with the same rate
as it is discharged.It is used when battery rarely gets
discharged.It requires charging the battery at reduced
voltage to avoid the battery from overcharging.

**Boost charging involves a high current for a short period
of time to charge the battery. It is used when battery is
discharged heavily, it enables quick charging of batteries.

defination of transistor controlled series capacitor

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why incomer bay is required before transformer bay if there are more than 1 nos. of transformer bay.

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why transformer ratings are taken in 11kv 22kv 33kv but not in 10,20,30kv

5 Answers   ushacomm,

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Where the excitation is given either stator or rotor in actually in power plants?

13 Answers  

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A 1F capacitor is charged to 100V initially. A 1H inductor is connected accros the capacitor througha a switch. The current in the circiut when the switch is closed is____

0 Answers   Ecil, L&T,

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fundamentals of transformers.

5 Answers   Adani,

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why do the core of transformer saturates???

1 Answers  

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I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

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why we don't use earthing as neutral?

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in 33kv/11kv stepdown t/f why should we use Star point

2 Answers  

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What is the different between earthing & Neutal

3 Answers  

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Why is the frequency not changed during transformation of electrical energy in a transformer?

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