pichumani


{ City } new delhi
< Country > india
* Profession * associate vice president (proj
User No # 46686
Total Questions Posted # 0
Total Answers Posted # 9

Total Answers Posted for My Questions # 0
Total Views for My Questions # 0

Users Marked my Answers as Correct # 35
Users Marked my Answers as Wrong # 25
Questions / { pichumani }
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Answers / { pichumani }

Question { TATA, 30337 }

what is CRGO Transformers?


Answer

There is nothing like CRGO transformer. The transformers
are provided with cores made of CRGO steel for higher
efficiency. CRGO is already explained in the other answers

Is This Answer Correct ?    3 Yes 7 No

Question { 6696 }

what is appearent power?


Answer

In simple terms, Apparent Power is kVA, Active Power is kW
and reactive power is kVAr.

Is This Answer Correct ?    2 Yes 0 No


Question { Dalkia, 7760 }

how to determine capacitor bank capacity of one plant..


Answer

As a thumb rule, 1/3 (30% appx.) of your KVA demand shall
be the KVAR requirement of your plant.

Is This Answer Correct ?    2 Yes 1 No

Question { PowerTech, 9160 }

for a 132/33kv transformer secondary is star and is
connected to NER. and from secondary a cable is running to
33kv swbd. since the cable is single core do i have to run
neutral cable also to 33kv swbd.???


Answer

It is not necessary to run a neutral cable as the same is
not requried for a 33 kV 3 wire AC system. But you need to
be cautious about the circulating/eddy current (since in
is a single core cable) which flows through the screen of
the 33kV cable. The voltage genrated by the circulating
current should be more than 130 V as per IEC standards. In
case of heavy circulating current the cable would get
heated up. You may do earthing of the cable only at one end
and leave it open at the other end. In case of a very long
cable with joints in between, mid point bonding is
suggested.

Is This Answer Correct ?    1 Yes 2 No

Question { 10868 }

in our transmisison sub station why we step down firstly
132kv\33kv then 33kv to 11kv. can we direct step down 132kv
to 11kv.


Answer

It is only for easy transmission and distribution. 11 kV
is normally used for town distribution. 33kV is used for
transmission to farther areas where the voltage is stepped
down by 33/11 kV sub stations. Normally in 132 incoming sub
stations you will have both 33 kv and 11 kV outgoings
depending upon the location of the 132/33/11 kV sub station.

Is This Answer Correct ?    13 Yes 7 No

Question { 6680 }

WHAT IS MINIMUM AMOUNT OF CURRENT THE HUMAN BEING CANT
RECOVER FROM THE SHOCK,WHAT IS THE RESISTANCE OF THE HUMAN
BODY


Answer

The threshhold value of current than can make a person numb
is 27 milli amps. In my opinion the resistance would vary
from person to person

Is This Answer Correct ?    2 Yes 3 No

Question { 4422 }

Which standard i will refer for size of earthing conductor
for equipment? (Eg:415V Switchgear, MCC, DB shall be 50x6mm
GI flat)


Answer

IS3043 / 1987 for earthing

Is This Answer Correct ?    0 Yes 0 No

Question { 24770 }

What is the advantangeous over SFU (switch fuse Unit) & FsU
(Fuse Switch unit) which one is better & application of
Both?


Answer

FSU is better than SFU. The fuse is totally isolated from
supply in off position. Can be mounted in any
configuration as incoming and outgoing can be connected on
either side. In SFU the incoming can be connected only to
the switch side and not on the fuse side.

Is This Answer Correct ?    8 Yes 3 No

Question { ABB, 16835 }

11/.433KV, 100KVA TRANSFORMER is supplied with .433KV AT
ITS PRIMARY. HOW MUCH KVA IT CAN SUPPLY


Answer

The full load secondary current of 11/0.433 kV, 100 kVA
trafo is 140 Amps. This much current only can flow on the
secondary. The secondary voltage when 433 V is fed to the
primary is 17 Volts (433x433/1000). Hence it would give
about 4 kVA. (1.732x17x140/1000)

Is This Answer Correct ?    4 Yes 2 No