Answer / brandon

To compensate in the case a line has too much capacitive current, or the line has usually low charge. In the latter case, if the capacitive component is too great, the line experiences overvoltages which are harmful.

Answer / ankit

To avoid Ferranti Effect in case of lightly loaded line

Answer / umesh

Remove the Harmonics in the system.

Answer / sauvik biswas

With the fast expanding power system, the fault level (i.e. the power available to flow into a fault) is
also rising. The circuit breakers connected in the power system must be capable of dealing with
maximum possible short-circuit currents that can occur at their points of connection. Generally, the
reactance of the system under fault conditions is low and fault currents may rise to a dangerously high
value. If no steps are taken to limit the value of these short-circuit currents, not only will the duty
required of circuit breakers be excessively heavy, but also damage to lines and other equipment will
almost certainly occur.
In order to limit the short-circuit currents to a value which the circuit breakers can handle, additional
reactances known as reactors are connected in series with the system at suitable points. A
reactor is a coil of number of turns designed to have a large inductance as compared to its ohmic
resistance. The forces on the turns of these reactors under short-circuit conditions are considerable
and, therefore, the windings must be solidly braced. It may be added that due to very small resistance
of reactors, there is very little change in the efficiency of the system.
Advantages
(i) Reactors limit the flow of short-circuit current and thus protect the equipment from overheating
as well as from failure due to destructive mechanical forces.
(ii) Troubles are localised or isolated at the point where they originate without communicating
their disturbing effects to other parts of the power system. This increases the chances of
continuity of supply.
(iii) They permit the installation of circuit breakers of lower rating.

Answer / irfankh

to limit short ckt current, for that we use reactors
formula:
Ish=v/xL

what is FACTS & where i can material regarding to facts.

2 Answers  

how to get electrical supervisor competency certificate in gujarat. i did 3 year diploma in electrical

0 Answers  

what is a relation of energy in electromagetic field

1 Answers  

Alternators are invariably star connected why?

4 Answers  

what is hormonics. how it is generated & what are the problem faced by that.

5 Answers   APC,

WAT IS MEANT BY COLD AND HOT START OF A MOTOR?? HOW DOES IT AFFECT A MOTOR'S PERFORMANCE??

4 Answers  

what is the VA(Voltampire)? define with calculation?

4 Answers  

what is the function of buchhos rely in transformer

5 Answers  

Why do we require transformer with less specific weight if supply frequency is increased?

0 Answers  

Isi standard of lux level required / to be maitained in different working place general & in textaile industry.

1 Answers  

What are objectives of energy managements ?

1 Answers   Kirloskar, RR,

Could u pls tell me the NPCIL electrical engineering interview questions for Executive trainee, and also guide me how to face the interview.

0 Answers