No matter star connection or triangle connection, for dry-type transformer, if ABC three-phase line is arbitrarily exchanged, that is, the connection of ABC three-phase line is inconsistent in design, then the inconsistent rule will be copied to the output end, that is, the output terminal ABC three-phase terminal and ABC three-wire will also produce deviation.
For example, for the three terminals of dry-type transformer ABC, if I connect the line in A-C B-B C-A mode, then the output end winder will also be a-c B-B C-A rule. In other words, if the ABC three-phase is reversed at the input side, the output side is also reversed.
But if the reverse connection is exactly the opposite, the general small transformer (household power supply) will not have any problem, for the micro transformer (several thousand watts) no matter how the reverse connection is OK.
However, the efficiency has decreased. However, the reverse connection is absolutely not allowed for large dry-type transformers. Under high load conditions, some serious unforeseen consequences of plate bending machine are usually produced, which is not only the efficiency decline, However, due to the change of phase sequence, the winding machine has some conflicts with the magnetic structure designed by the transformer itself, and the dry-type transformer needs to consume the energy generated by the conflict and generate intense heat, which is dangerous at this time.
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