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For two transformers wired in parallel, if the two voltages are out of phase with each other, the induced voltages are such that they cause ___ to circulate between the transformers.

A transformer should be sized so that it is equal to or larger than the ___ calculation.

A standard transformer operated at 25 Hz has lower ___ than one operated at 60 Hz and can easily overheat.

A simple test with a(n) ___ on the primary leads can be done to test for proper load balancing.

Transformers with unequal impedances can be wired to accomplish an equal division of the load.

A(n) ___ system is a control system with a grounded secondary in the control transformer.

___ voltage reduces the available starting torque on 3-phase and single phase motors, such as water pumps and water coolers.

It is a common industry practice to ___ a transformer to avoid having an outage.

A current transformer should always have its secondary ___ when not connected to an external load.

A 2-phase system is a power supply consisting of two phases that are ___° out of phase.