Nameplate-defined parameters for the motor such as power factor, efficiency, torque, and current are at rated voltage and frequency. Application at other than nameplate voltage will likely produce different performance. It is common for manufacturers to nameplate a wide variety of voltages on one motor nameplate.
What is found on a motor nameplate?
The nameplate-defined parameters for the motor – such as power factor, efficiency, torque and current – are at rated voltage and frequency. When the motor is used at other voltages than the voltage indicated on the nameplate, its performance will be affected.
Which of the following information is available on the nameplate of motor?
The NEC states that the motor nameplate must show the following information: Rated voltage or voltages. Rated full-load amps for each voltage level. Frequency.
What purpose does the information on a motor nameplate serve?
This data tells you at which voltage the motor is made to operate. Nameplate-defined parameters for the motor such as power factor, efficiency, torque and current are at rated voltage and frequency. When the motor is used at other voltages than the voltage indicated on the nameplate, its performance will be affected.
Which of the following information is available on the name plate of a motor Mcq?
Explanation: Name plate of the motor shows rated values i.e. rated speed, rated current, rated voltage. It also shows output power available at shaft when all other quantities are set to rated values.
What is SFA on motor nameplate?
Service Factor Amps, or S.F.A., represents the amount of current the motor will draw when running at the full Service Factor. In the example nameplate, the S.F.A. is eight amps at 230 volts. Continually exceeding the S.F.A. shown on the nameplate can shorten motor life.
What are the applications of Universal Motors Mcq?
Universal Motors MCQ Question 6 Detailed Solution
|Split phase motor||Small drill presses, Shop grinders, Small belt-driven conveyors, Washing machine,|
|Permanent capacitor motor||Compressors, Conveyors, Refrigerators, Air conditioners, Ceiling fans|
What is frame in motor?
The two-digit frame number relates to the shaft height in sixteenths of an inch. You can figure that a 48-frame motor will have a shaft height of 48 divided by 16, or 3 in. Similarly, a 56-frame motor has a shaft height of 3.5 in.
What is a motor code?
The nameplates of alternating current (AC) motors built to National Electrical Manufacturers Association (NEMA) standards reference a system of alphabetical letters that designate the principal characteristics of each motor—code, design and insulation class. …
What do the numbers on an electric motor mean?
Generally, the first two numbers indicate the diameter of the entire can of the motor OR the diameter of the stator (the inner part of the motor) only. … Similarly, the second pair of numbers can indicate either the height of the entire motor, or only the height of the stator.
What is Fr on a motor?
Frame Designation (FR) – this is typically a two or three digit number followed by one or more letters that identifies important mounting dimensions. Manufacturers Type (TYPE). Manufacturers may use the TYPE block to designate a product family or some other qualifier that identifies the motor’s fit or function.
How do I find my motor details without nameplate?
Use a strobe tachometer to determine motor RPM and then set up a generic motor in the database for that RPM. If loading cannot be provided by the operator use the acquired data and RPM to approximate loading. You can view the power factor for a value around 88 to 92 to approximate full load.