Answer / vijay

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

Answer / mano

the induced EMF when the field current is zero is known as residual voltage

Answer / amarendra barad

Dear Friends,
I think, Residual voltage means the voltage that lefts in
the source of supply after removing the main cause of
production.

Answer / rajesh

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

when voltage increases then current also increases then what is the need of over voltage relay and over current relay? can we measure over voltage and over current by measuring current only?

1 Answers  

---

n1 =1000 n2 =?;v1 =200:v2 =400

1 Answers   APGenco,

---

low frequency protection why recomend?

0 Answers  

---

how give earthing to shif and aeroplane which is away from earth?

1 Answers   ABC,

---

what is the concept of directional power?

0 Answers  

---

electrical machines

3 Answers  

---

What is the megger value for ht

16 Answers   Electrical,

---

what is load shedding

4 Answers   KSEB,

---

what happen ,if generator will generate leading power factor?

6 Answers   CD, NTPC,

---

State thevenintheorem?

0 Answers  

---

According to general circuit diagram of 1-Phase t/f , why the primary is not get short circuited ,even though the supply terminals both are directly connected through primary winding?

4 Answers  

---

what main difference betwenn invetter & ups & major difference

2 Answers   ABB,

---