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The most common control transformers have ___ primary coils and one secondary coil.

A(n) ___ device must be provided to cause the main switch or common overcurrent protection device to open if the load reaches 125% of its rating.

A ___ current transformer is a special type of window current transformer with a solid bar placed permanently through the window.

Common applications in the use of autotransformers are ___.

The phase difference between the primary and secondary in a control transformer is ___°.

Autotransformer reduced-voltage starting provides the highest possible starting ___ per ampere of line current.

Variable-speed drives use current transformers to monitor the outgoing current.

A ___ transformer is a continuously adjustable autotransformer consisting of a single layer of wire wound on a toroidal core, and a carbon brush that traverses this winding.

A ___ transformer is a transformer that is used to step down the voltage to the controls and control devices of a circuit or machine.

The line voltage can be calculated by ___ the measured voltage and the turns ratio of the transformer.