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Question
What is Residual Voltage & Residual Current?
 Question Submitted By :: Udayak25
I also faced this Question!!     Rank Answer Posted By  
 
  Re: What is Residual Voltage & Residual Current?
Answer
# 1
This case arises only in series dc generator
current should be sent around the poles to magnetize.
this current can the source(generator).
current is passed through poles if it is loaded.
but if it is not loaded current is zero through the field.
load voltage should be zero actually.but this dont
happen.we us egenerator frequently.due to this poles are
partially magnetized this causes some voltage appear called
residual voltage.



i haven't heard about residual current
 
Is This Answer Correct ?    7 Yes 22 No
Rajesh
 
  Re: What is Residual Voltage & Residual Current?
Answer
# 2
Meaning of Residue:

A small amount of something that remains after the main
part has gone or been taken or used.

Now coming to technical understanding:

Residual voltage is the voltage that is remaining in form
of induced emf i.e., magnetic field in the windings of
generator or motor which will help in producing voltage in
generators and back emf in motors.

Residual current is the current which the sum of currents
in all the phases flowing towards and away from the node
must be zero, if it is not so the value which remains is
called residue so residual current.
I1+I2+I3+IN=0

To detect the residual current in power system RCCB & ELCB
are used.

RCCB= RESIDUAL CURRENT CIRCUIT BREAKER
ELCB= EARTH LEAKAGE CIRCUIT BREAKER.

My friend I think this information may help you.
If any correction is to be made please send the corrections
to my mail id: knownfellow7@yahoo.co.in
 
Is This Answer Correct ?    47 Yes 4 No
Vijay
 
 
 
  Re: What is Residual Voltage & Residual Current?
Answer
# 3
Dear Friends,
I think, Residual voltage means the voltage that lefts in
the source of supply after removing the main cause of
production.
 
Is This Answer Correct ?    7 Yes 2 No
Amarendra Barad
 

 
 
 
Other Electrical Engineering Interview Questions
 
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is emf is indued if dc is passed through coil   5
how many voltage or current enough to kill a person?   12
what is H.T?specify the range?   6
why we are 0.8 power factor only?   1
How to calcluate the current by means wires/cables in square mm   2
what will happen if we double the input frequency of a transformer keeping the voltage constant?   4
in an open circuit. test there is no load curent.. but secondary. ia open then no urrent have to flow but there a smaller current flows why? Rubber-Park 4
how work the lighting arrestor?   2
what is the difference between earth and neutral. DLF 8
I have 500A load (WHICH IS SEPARATE MDP PANEL),an MCC panel with 4000A Breaker.Already I have 2500A load.Can I connect this load directly to the Busbar since I have PROTECTION IN MY MDP Panel ?   3
what will happen when ac is applied resistor,inductor,capcitor?   1
I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase), before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???   1
 
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