Answer / loboreliance2003

Actually the question should be why is the capacitor bank
connection to be removed from the motor before taking the
no load test. This has nothing to do with capacitor of
motor. 3Ph induction motors dont have capacitors to
start.These are only used for single phase motors.

The answer is that capacitor bank is provided on any
Inductive load due to power factor dipping to below0.8 and
sometimes even to 0.5. To improve the power factor we have
to connect the capacitor banks depending on the size of
motor.

But if motor is not run on load then it is not necessary to
connect the capacitor. Hence no load tests can be done
without having to connect the capacitor bank to the motor.

the other reason is that there is danger of over voltage
due to capcitor being connected then PF will be greater
than 1 which could damage the motor windings. I have faced
these motor burning problems due to this reason.

Answer / mukesh.k.sharma

plz send me ans on my mail id
mukesh.k.sharma@adityabirla.com

Answer / baskaran

no need to capacitor in 3phase induction motor.
if capacitor used means improve the powerfactor only..

Answer / abhinav

i am not seen 3 phase induction motor require capasitor.

Answer / mas tachnocrat

hmm 3 phase inductin motor needs a capacitor; to improve
power factor or if u want to start 3 phase induction motor
from 2 phase
or noload test main capacitor kya kare gaa

Answer / raju

3 ph induction motor doesn't require any capacitor.in 1 ph induction motor require capacitor to divide a phase into two (as per double revolving field theory)so there is no need of capacitor

Answer / ramesh

i also face this ques pls send the ans

1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?

0 Answers  

how to arrange the generator protection ansi 48 (loss of phase?)

3 Answers  

what is wave trap? And how it works?

3 Answers  

what is diffrenance between ACB and Isolator

3 Answers  

HOW DO YOU PROVE THE HIGH VOLTAGE CABLES OR BUSBAR IS DEAD EVEN AFTER IT IS DE ENERGISED

6 Answers  

what will hapen if secodery circuit is open of current transformer

8 Answers   KPTCL,

Why different values of B’s (magnetic flux density) are chosen for DC machines and Induction Motors?

1 Answers  

how we identify AC or DC machine at the time of seeing, with out use of name plate?

4 Answers  

what is under coal gassification?

0 Answers  

What is d role of reactive power in power system??How it produce & consume?

5 Answers   ABB,

Why AC & DC capacitor are use in UPS ??????????????????

0 Answers   Sanghi,

how could we findout the lightning arrester failed or not in live circuit? Is there any instrument to measure the high voltage at the time of sky lighting?

1 Answers