Autotransformer reduced-voltage motor starting reduces the applied motor voltage to 50%, 65%, or 80% of the ___ voltage when starting.
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Sychronous motors have a ___-part motor.
Sychronous motors have a ___-part motor.
The accuracy of a transformer is only affected by its design…
The accuracy of a transformer is only affected by its design.
Current transformers typically consist of ___ winding(s).
Current transformers typically consist of ___ winding(s).
The reason for fusing both sides of a control transformer is…
The reason for fusing both sides of a control transformer is to protect the primary if there is a short in the secondary.
A(n) ___ transformer is a transformer used to supply low-vol…
A(n) ___ transformer is a transformer used to supply low-voltage, low-power circuits, such as for doorbells, annunciators, and similar systems.
The most common control transformers have ___ primary coils…
The most common control transformers have ___ primary coils and one secondary coil.
A(n) ___ device must be provided to cause the main switch or…
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 curren…
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 ___.
Common applications in the use of autotransformers are ___.