Answer / excellenceokoli

There are many causes
of low voltages. Some of
them are:
1). Overloading of a
particular phase.
2). Cable size.
3). Phase failure
4). Rust and worn out
cables.
5). Loose connections.
6). Neutral failure.

Answer / murali

* We using many indutive loads(FANS,ANY MOTORS)
so powerfactor is below 0.4 (leading current in voltage)
so produce voltage drops
* Using capacitors in parallel to the loads
improve the powerfactor
* loads are properly divided reduce the voltage drops

Answer / anand

Thhe probable reasons of low volage in houses are:
a)One of the phase on HT syde of transformer disconnected
because of breaking of jumper/HT fuse
b) excessive load on that particulr phase to which house is
conected
c)lower size of LT cable/ OH conductor selection resulting
in high voltage drop

Answer / renyrjn

i think inductive load might be the right answer

Answer / sakira

electricity is nothing but the energy generated at station.
when it is transfer to home it goes from stage to stage.
the potential difference is decreasing at every stage to
maintain the current going in back to ground.
1) Possible reason is poor grounding OR NEUTRAL.
2) In the area use of high power devices(floor mile, lath
machine)
3)low current capacity cable wiring in the house.

now a days electricity is stable at various places in the
villages it is still high or low voltage.
use the stabilizer (servo stabilizer) use some branded one
as even local one is cheaper they not use the protection or
the radition protection.

Ultimatly good design and manufacturing the with good
components are different.

Answer / ravi kumar

Excessive load of a conductor beyond its rated capacity
causes voltage drop at other end

Answer / sanjeet swarnakar

due to inductive load
power factor decrease

so voltage regulation is required to make up the loss of
voltage

please tell me ur email ID
my email ID is sanjeet.swarnakar@gmail.com

Answer / rk sharma

Inadeqately distribution of load in LT side.

Answer / arif pathan

There are many reason for using Low voltage(415V,3ph)in
Houses:
1) Due to use of 415v at LV side of tranformer the Fualt
level & short cicuit current will be less compare to HV
side , hence you will require small size of cables upto
your main distribution panel.
2) If your short circuit(kA)& fault Level(kVA/MVA)is less
you reqire small rating of CB or SFU for protection.
3) Due to 415V (L-L) your operating devices, equipment can
run on 230V (P-L) For which they are designed.

Answer / dk

1--h.t. side fuse of transfarmar
is disconnected
2--high inductive reactance equipment

( Re: WHAT SHOULD BE THE RATING OF MCCB FOR 415V,3Ph,50KVAR CAPACITOR BANK Answer # 1 The capacitor current would be kvar x 1000 / (415 x sqrt3). This would be 70a approx. The MCCB selected should have *atleast 1.4 times this current i.e. 1.4 x 70= 98. So you should choose at least 100 A mccb.) regarding to this answer,i would like to know why the current have to times 1.4 to get the right amphere for the mccb.hows the formula to get the 1.4??tq

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