# measuring current through neutral wire

Discussion in 'General Electronics Chat' started by lukus08, Mar 16, 2009.

1. ### lukus08 Thread Starter Active Member

Mar 14, 2009
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in the attached file how do i measure R if it is open circuted. phase sequence is RYB, impedance 3+7j.
also how can do i hand calculate it?

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Last edited: Mar 17, 2009
2. ### kubeek AAC Fanatic!

Sep 20, 2005
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There is no R, there is just Z1 Z2 and Z3. Do you realize that the far ends of Z1 and Z3 are connected together as node 5, and only Z2 is connected to ground? Maybe this is an error in your simulation, and you wanted all three grounded...

Btw, why don´t you stick with the old thread?

3. ### lukus08 Thread Starter Active Member

Mar 14, 2009
34
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yes i do, there all meant to be grounded. R is the top wire with z1 connected to it

4. ### thatoneguy AAC Fanatic!

Feb 19, 2009
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For all to be grounded, the nets 5 and 0 need to be connected to each other, which would give them all the net number of 0.

--ETA: Which "R" is to be measured? What is open circuited? I see no "R", only Z (impedances). Is the question "How to find the real part of impedance"? i.e. "A"?

5. ### lukus08 Thread Starter Active Member

Mar 14, 2009
34
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ok, if you look at the new attached file, im looking to measure current of neutral wire if phase R is open circuited.

6. ### t_n_k AAC Fanatic!

Mar 6, 2009
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I have Ineutral = -13.27 +j5.69 ampere ...?

7. ### kubeek AAC Fanatic!

Sep 20, 2005
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lukus08: Impedance of WHAT is 3+7j??
Could you please take the time and write a normal reply to all our questions? Otherwise this thread is completely useless.

8. ### lukus08 Thread Starter Active Member

Mar 14, 2009
34
0
impedance load per phase (so each z1, z2 and z3) on the diagram is 3+7j.