consider a 3phase induction motor,it is a selfstarting
device.Eventhough it is a selfstarting one we are connecting
this device to starter because if we can not connect this
motor to stator because of sudden flow of currents in the
rotor windings some damage may takes place to the machine.so
we can start up the motor with starter means we can limit
the currents to certain value upto which the rotor gets
accelerated.When ever rotor attained its rated speed then
there is no problem of current flow.
Please Help Members By Posting Answers For Below Questions
How can we measure earthing resistance test (Earth meggar) of
Transformer neutral pit while in live condition?.
This is reqd for a 1MW Solar power plant..We have 2DC
outputs from the solar panels Connected to 2INVERTOR
panels.. Output from invertor is 3ph,280v,500kva,50hz.These
are connected to individual ACB.This has to be stepped up
to 11KV ,1250KVA SYSTEM.Now can I use (1) one more ACBTO
GIVE A COMBINED OUTPUT OF 1000KVA,280V & STEP UP THE OUTPUT
BY USING a single two winding 3 ph transformer 11kv/1250kva.
or (2)use the two outputs and connect to one three winding
transformer of above rating..Pls suggestwith details.
how we calculate the dick for a pole?
What is the maximum percentage voltage drop (vd%)for a
motor control center
how can service sitting be setted for MCCB?Example for
sittings IR (CURRENT RATING),IS(CURRENT STARTING)IO
Is MEN and RCD related to each other ?? IF yes then how??
Draw a circuit diagram in which if button is open we can
use socket and bulb as a series test circit
if button is close than simple we can use socket as any
apti mainly on logical reasoning, verbal and non-verbal
ability (70 percent) and remaining technical. I was in ee
but technical had mech ques like on turbines and welding.
How one may guess the
direction from which the
distribution line is
incoming if there is no
pole plate on poles?
Can anybody just suggest about the scope of Electrical
design with ETAP software?Just guide me?
what is calculation mathod/formaulla for deciding Size of
busbar (Copper/ aluminum)for L.T. panel on Various Fault
level like 50kA,25kA,10kA
how much excitation voltage required to generate 1mw power?
please suggest some good universities with low cost iam in totally full confusion so please help me my profile gre 283 and ielts 5.5
what is parellel power factor correction?
Electromagnetic torque developed by the motor is
compared to shaft torque.
A less B same
C depends on motor design D more