Exam 1: Transformers and Power Supplies

Voltage ____________________ in transformers is the difference between the no-load voltage and the full-load voltage.

What is the standard frequency that is utilized in Europe, Asia, and many countries throughout the world?

The primary purpose of a(n) ____________________ is to convert the incoming AC voltage to a DC voltage for use by the control circuit.

Most control circuits in industry today utilize AC to provide electrical energy for devices that control equipment.

Temperature ____ in a transformer is the amount by which the temperature of the windings and insulation exceeds the existing ambient or surrounding temperature.

The transformer that converts the 480 VAC to 120 VAC for use in the control circuit is called the ____________________.

On a circuit diagram, the rule for assigning wire numbers states that the wire number will change every time the wire goes through a device.

Utility supply problems can be overcome by connecting a(n) ____ between the utility supply and sensitive load equipment.

The main power that is supplied to industries in the United States is three phase (3F), ____ volts alternating current (VAC), at a frequency of 60 Hertz (Hz).

The transformer must be sized to handle the full load current for all of the devices that may be in operation at any given time.