Electrical Engineering - Three-Phase Systems in Power Applications - Discussion
Discussion Forum : Three-Phase Systems in Power Applications - General Questions (Q.No. 2)
2.
In a three-phase system, when the loads are perfectly balanced, the neutral current is
Discussion:
29 comments Page 2 of 3.
S.hari said:
1 decade ago
Because of neutral current = I1+I2+I3 becomes zero.
Sandip said:
1 decade ago
The sum of current = to load current. So it is zero.
Rajiv gandhi said:
1 decade ago
As per KCL law the sum of the incoming current is equal to sum of the outgoing current in a balancing circuit three phase system.
Prabhu said:
1 decade ago
Memorized KCL.
INCOMING CURRENT = OUTGOING CURRENT.
i1+i2+i3 = i.
INCOMING CURRENT = OUTGOING CURRENT.
i1+i2+i3 = i.
Srinivas said:
1 decade ago
Here i = i1+i2+i3.
Hence i is neutral.
Hence i is neutral.
Biman Roy said:
1 decade ago
At balance condition Ia+Ib+Ic=0. So neutral current becomes zero.
Nagaraju said:
1 decade ago
In 3 phase system balanced currents is equal to ZERO.
Bhimesh said:
10 years ago
As a considered KCL law incoming currents are equal to outgoing currents so the system balanced condition (IR=IY=IB=0). In this condition considered the neutral current is ZERO.
Shankar said:
9 years ago
Yes, you are correct @Bhimesh.
Sanjeev said:
9 years ago
Since we have shown that the neutral current is zero we can see that removing the neutral core will have no effect on the circuit, provided the system is balanced. Such connections are generally used only when the load on the three phases is part of the same piece of equipment (for example a three-phase motor), as otherwise switching loads and slight imbalances would cause large voltage fluctuations.
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