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
what is the difference between old fan regulator and new fan
How short circuit MVA(Fault MVA) in a power system
calculated for calculating number of earth plates ?
Phase control and integral control are used for?
how much UPS neutral erath leakage current.
For 300MW and over a distance 250 km, what voltage be
selected? and no. of circuit?
how to measure dc earth leakage current?
What is the restart inhabit setting in ABB spam150c relay
(Motor protection relay)
What kind of preventive maintenance are there for AC induction motor?
is IS says that neutral should be brought to switch box.
and this one is a recomended practice
how to work droop ct in generating station
In cable sizing calculation (determining the max route length
of cable) why we choose the shortest length between cable
length of full load current Iflc & starting current Istart?
FOR 16/20 MVA 132/33 KV ONAN/ONAF TYPE TRANSFORMER IT IS
DESIGNED FOR 16 MVA WITH ONAN CONDITION.IT BECOMES 20 MVA
UNDER ONAF CONDITION.LOAD LOSS IS GUARANTEED FOR 65KW AT 20
MVA AND % IMPEDANCE 13.75.
PLEASE TELL US AT WHAT LOAD LOSS AND % IMPEDANCE IT SHOULD
BE DESIGNED FOR 16 MVA AND WHAT WILL BE ITS EFFICIENCY AT
how oltc works in rectiformers of higher rating (27 mva,200v
dc,120kamps) please provide me full information with diaggram.
WHAT IS THE USE OF PIG TAIL IN WINDOW CT ?
HELLO EVERYONE, I RECENTLY HAVE FOUND ONE PROBLEM, I WAS
TAKING NO LOAD TRIAL OF AN HT MOTOR 920 MOTOR , 1440 RPM ,
6.6 KV, WITH AUTO TRANSFORMER. AT 450 V, LOAD WAS 40 AMP
AND SPEED WAS 250 RPM. BUT AS WE INCREASE VOLTAGE FROM 450
TO 480V, LOAD BECOME 41 AND SPEED REDUCED TO SOME RPM . SO
WHICH PHENOMENON ACTED HERE FOR REDUCING SPEED.?? AND IS IT
HAPPENING ALWAYS OR IT IS RARE? I ALSO HAVE FACED SUCH
PROBLEM WITH FEW LT MOTOR ALSO.