Author Topic: What does this mean. (Read 1401 times)

thedoc298 · « **on:** October 04, 2019, 11:29:01 pm »

This is on the tag of a distribution transformer. Does anyone know what the number 12470Y mean. Thanks

helius · « **Reply #1 on:** October 04, 2019, 11:43:32 pm »

12470 is the voltage across phases, and Y means it is a wye-connected primary. The primary voltage betwen each phase and the neutral (star) point is 7200. See http://en.wikipedia.org/wiki/Three-phase and http://en.wikipedia.org/wiki/Delta-wye_transformer for more details.

ataradov · « **Reply #2 on:** October 04, 2019, 11:44:01 pm »

12470V is phase to phase voltage. 7200V is the phase to neutral voltage.

thedoc298 · « **Reply #3 on:** October 04, 2019, 11:46:38 pm »

Thank you both, knew it was 7200 but did not know the other stuff. Still learning.

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