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If the fuse is blown in a transformer primary, it is appropriate to assume the transformer is no longer hot.

In general, two or more transformers wired in parallel are more efficient than a single transformer.

A transformer of one vector group cannot be connected in parallel with a transformer of another group because of the difference in angular displacement.

A(n) ___ with 6-phase input is more efficient than the 3-phase equivalent.

Two-phase systems are still extremely common in all industrial areas.

When testing parallel connections, it is best to have the transformers ___.

A T-connection with the teaser transformer operates at a reduced flux and therefore operates with a reduced iron loss and at a higher efficiency than open delta transformers.

A T-connection maintains a balanced phase relation better than a(n) ___.

For two transformers wired in parallel, if the transformer impedances are unequal, the load divides between them in inverse proportion to their ___.

Variable transformers can have extremely low power losses with efficiencies as high as 98%.