generally the resistance of armature is very small i.e in
term of .05ohm or like this.this is due to reduce the
losses.if the motor is connected direct supply high current
will flow and it may burn the armature winding.thats why
starter is connected between supply and motor which reduces
the starting current and provided smooth operation
Please Help Members By Posting Answers For Below Questions
How to design harmonic filter at the project stage without
nowing the harmonics levels
1. What is differential relay? How it operates?
2.How to calculate the Short Circuit Impedance in
3.What is the alternate solution for testing of polarity by
tester while its milli ammeter does not works?
4. While testing the 33KV Busbar by using Hipot kit, what
should be the test
voltage we have to apply?
5. What is the procedure/activities to be taken to inject
the current more than
2000A by using 2000A Loading Transformer?
6. Explain how you can give the overload setting to any
Relay for a HT motors with formula and example?
7. Why restricted earth fault protection is needed? Why
Protection is sufficient?
8. What should be the minimum and maximum ohmic value for
9. Why DC Currents are not used in transformer?
10. What is the Frequency while we step up the voltage from
11KV? Is it possible? Explain it?
why on axial hitting up of air blast on hydrogen produced in
oil circuit breaker,temperature rises of the core of the arc?
What are the types of windings present in the ceiling fan?
What winding will be effective first when we started the
fan?What are the resistance and inductance ratios
comparatively at the initial speed and full speed of the fan?
How seriving & testing of the HT & LT breakers are done. What
are the standard Ir values on which we can come to know the
test is passed or failed?
dear all i am kumara now current working in electrical
designing of control and relay panel i want learn some
substaion design then any book are available. pls mention
name and authour
A jet of fluid strikes a plate What was the force required
to counter it?
how to calculate the formula of cable size if motor kw is
why did youi choose this career?
what is the control circuit for operating the clean room air
IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF
THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO
POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF
CURRENT I SHOULD USE WHICH TYPE OF CABLE?
ITI r/tv trade APPLY (J.T.O VACANCEY) ALSO INCLUD AITT
ELECTRONIC,WRITEEN XAM DONE 23.03.10 BUT NO RESPONCE WHY
ANATHER ID email@example.com
why we use condenser in the thermal power plant, althrough
the same vapour will be again heated
What is different between MCB & MCC & isolator switch
What are the advantages of using distance protection
schemes as opposed to normal overcurrent/ earth fault
protection on high voltage feeders.