Motor nameplate data

power meter

An ___ is required to measure the amount of power a motor is using

loaded

The nameplate current rating of a motor is only reached when the motor is fully_____.

1.34

To convert a kW rated motor to HP, the kW rating is multiplied by ___.

6%

For every 1% voltage unbalanced, there can be up to a ___ % current unbalance.

code letter

The amount of current a motor draws when starting is indicated by a _____ on the motor nameplate.

lower

The closer the nameplate listed code letter is to "A" , the ____ the motor's starting current

locked rotor current

LRC is an abbreviation for ___.

over load rating

A motor's service factor rating is equal to its margin of ___ rating.

1.35

Standard motor service factor ratings are 1, 1.15, 1.25 and ____

synchronous

The two speed ratings of a motor are ___ and operation.

20%

It is recommended not to operate a motor at ____ % or higher than its nameplate rated speed.

CONT

Motors designed to operate for unlimited time periods are marked "______".

10 degrees Fahrenheit

For every ____ degrees Fahrenheit above the rated temperature limit of a motor, the motor's life will be cut in half.

40 degrees Celsius

A motor without a temperature rating on its nameplate is typically rated for ____ degrees Celsius.

H

the four motor insulation classes are A, B, F, and ____.

torque

The design letter rating represents the ___ characteristics of the motor

ENCL

The type of enclosure a motor has listed on its nameplate is the ___ rating.

open drip proof

ODP is an abbreviation for a ___ enclosure.

totally enclosed fan cooled

TEFC is an abbreviation for a ___ enclosure

sleeve

A ___type bearing is used where a low noise level is important.

True

a motor's nameplate power rating is determined by the manufacturer and cannot be changed.

false

A motor that is connected to a load will produce less than the rated nameplate power

false

For dual-voltage rated motors, a lower voltage rating corresponds to a lower current rating

true

Traditionally, motors manufactured in the United States have only a 60 Hz rating and motors manufactured in Europe have only a 50 Hz rating.

true

a motor with a listed code letter of "G" will have a lower starting current than a motor with a listed code letter of "H".

true

A general-purpose motor would be used with an industrial conveyor system

false

A nameplate service rating of 1 indicates the motor is designed to safely handle an overload condition above the motor's rated power

false

Typical intermittent-duty motor time rating are listed as 5, 10, 15, 30, 45, or 60 minutes.

true

The ENGERY POLICY ACT OF 2005 (epact 05) was created and took effect in 2005

FALSE

Sleeve bearing are used where higher load capacity is required or periodic lubrication is not practical.

Frequency

Electrical ratings on most motor nameplates include a power rating, voltage rating, current rating, and ___rating.

746

For conversion purposes, _____W equals 1 HP.

5

The actual voltage applied to a motor should be + ______ % of the motor's nameplate rated voltage.

decreases

As the load on a motor decreases, the current draw of the motor ___

7.67

The V/Hz for a 460 V, 3 phase motor at 60 Hz is _____ V/Hz.

wastewater treatment pump, HVAC

A ____ motor is an example of a specific-purpose motor.