| Other Electrical Engineering Interview Questions |
|| Asked @
|why are we adopting 132kv,220kv for transmission rather than using 440kv at all transmission lines as it gives lower losses?
|BRIEF ME CHECKING PRCEDURE OF BATTERY 12V 26AH
|why transformer rating in kva and motor rating in kw
|Difference Between B Curve & C Curve in MCB.
On the property I am renting, the supply voltage is 2 x 110
volts. These 2 x phases enter a energy meter which then
exit the meter to over head lines to my house.
Question 1. The meter is single phase 240 volts but is being
used as 2 x phase(2 x 110volt), is this acceptable? if not,
please give me the reasons.
The meter details are as follows:
60Hz 15amp Imax 100 amp Kd 3,6 Wh/R 1 fase 3 hilos
Model FX 231.
I think it was manufactured in Brasil
From this meter, the cables run along over head aluminum
conductors,I estimate the cross sectional area to be 25mm
diameter, but the neutral is only about 10mm square
diameter, which cover a distance of 170 meters and then
terminate with an underground cable of 65 meter length,
total length = 235 meters.
There must be a huge voltage drop over this length. This
line is protected with 2 x 200 amp aluminum fuses after the
meter, there is no main switch in the distribution board.
These 2 phases connect directly onto 2 busbars. Surely the
neutral should be the same size as the conductors if not more?
Question2. What are your thoughts about this installation,
should there be better protection, is the neutral too small?
During the night, the lights dim then brighten all the time,
this cannot be good for my electrical appliances.
In my home, I only have a small electric geyser and fridge,
my stove works off gas. But when i use other appliances
like the washing machine or microwave oven, the light dim.
The internal wiring of this house is done with solid hard
drawn copper wires and of course, they have to be under rated.
I am a retired electrician by trade, but not on the metering
and over head mains side, my experience is on the factory
maintenance side of things.
Your expertise on these matters will be greatly appreciated.
Please inform me how to rectify or make any improvements
Kind regards, my power bill is very expensive, so I need to
know how to bring it lower.
|What is the difference b/w RMU & substation
|AVR is used for the Voltage regulation of the Generator
using the feedback signal by exciting the field winding of
the generator.But how the field winding will be excited &
|What is the operational principle of direct current current
transformer and direct current potential transformer?if
possible plz reply with ckt. diagram.
|in india ac frequency is 50hz, but in foreign countries it
is 60hz,whwt is the reason
|what happens to the speed of a DC series motor when series
field winding is removed?
|Why Humming noise originated in Starter motor and how it
was generated ?
|what diferent amoung three phase supply?
|For more Electrical Engineering Interview Questions Click Here |