- #1
Neil Hayes
- 15
- 2
Homework Statement
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An 11kv motor is fed by cables from a transformer via switchgrear, having a phase impedence of 0.3 + j0.3 ohm. The Earth return path to the transformer neutral has a resistance of 0.42 ohm. Determine a suitable value of neutral resistance if the voltage rise at the motor in the event of an Earth fault at the motor is not to exceed 430 v
Hi there folks!
I would be very grateful for some suggestions in relation to the question above. I have asked my tutor for information on what exactly is being asked. The course material is vague and this was my best attempt at solving the problem. When I sent the attached pdf to my tutor they just replied :
Neutral resistor = Resistance path - 0.72
To me this seems too easy and also doesn't tie in with the information given in the associated lessons etc.
Maybe I'm on the right path but I'm just a bit unsure.
I would really appreciate any ideas :)
Neil
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