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Assume three-phase balanced loads in Δ or Y configuration connected to three-phase AC voltage sources in a Y configuration.

Does each load in three-phase loads consume equal average power? Assume symmetry of voltage sources and loads and voltage sources being in a positive phase sequence. Does each load have the same impedance?

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  • \$\begingroup\$ But the load in a 3 phase system is made of 3 single phase loads... \$\endgroup\$
    – Miss Mulan
    Commented Sep 21, 2022 at 16:04
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    \$\begingroup\$ You're answering your own question; at the end you say "Does each load have the same impedance" but you further constrain the question by saying "balanced load"/"assume symmetry of...loads" \$\endgroup\$
    – Brendan Simpson
    Commented Sep 21, 2022 at 16:06
  • \$\begingroup\$ Yes. I saw a problem in a book which says three phase balanced loads which I interpreted as three equal impedances implying they consume same power . Then I saw another problem in which in three phase balanced loads, the loads consume unequal power. This seemed like a contradiction. Which is the correct way to think about three phase balanced loads? \$\endgroup\$
    – Amit M
    Commented Sep 21, 2022 at 16:16

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Assume symmetry of voltage sources and loads and voltage sources being in a positive phase sequence. Does each load have the same impedance?

A balanced, 3-phase load has equal impedance for each of the three individual limbs.

Does each load in three-phase loads consume equal average power?

If the supply is balanced and the load is balanced then yes

But, you can't rule out imbalances in both that conspire in such a way to produce equal power in all three limbs.

Does each load in a three phase balanced load consume same average power which they get from three phase voltage sources?

Only when the supply is balanced.

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