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Generator voltages

Generator voltages

Generator voltages

(OP)
hi

a friend asked me a question:
In the generator test, the voltage between phase and zero was measured
400,400,230
What could be the problem?

thanks

RE: Generator voltages

It seems Blue phase terminal and star point (neutral terminal) got interchanged it looks.
It could be in the generator terminal box.

Rompicherla Raghunath

RE: Generator voltages

Operator error.
A-B = 400 Volts
A-C = 400 Volts
A-N = 230 Volts.
The tester inadvertently interchanged one phase and the wye point when testing.
Instead of testing from neutral to A, B, and C he tested from A to B, C, and neutral.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Generator voltages

Tiredly, 230 V, 230 V and 230 V.
Se my previous post.
To see 400 Volts you are measuring phase to phase. A-B, and A-C. To see 400 Volts from two 230 Volt windings the phase angles are correct.
Your friend had one phase interchanged with the neutral when he took his measurement.

Bill
--------------------
"Why not the best?"
Jimmy Carter

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