Which is the standard for motor nameplate marking?
In North America, the National Electric Manufacturers Association (NEMA) sets motor standards, including what should go on the nameplate (NEMA Standard MG 1-10.40 “Nameplate Marking for Medium Single-Phase and Polyphase Induction Motors”). In most of the rest of the world, the International Electrotechnical Commission (IEC) sets the standards.
What are the different types of motor standards?
The motor standards can be grouped into two major categories: NEMA and IEC (and its derivatives). In North America, the National Electric Manufacturers Association (NEMA) sets motor standards, including what should go on the nameplate (NEMA Standard MG 1-10.40 “Nameplate Marking for Medium Single-Phase and Polyphase Induction Motors”).
What does rounding up mean on a motor nameplate?
Rounding up allows for manufacturing variations that can occur and some normal voltage variations that might increase the full-load amps of the motor. The nameplate FLA is used to select the correct wire size, motor starter, and overload protection devices necessary to serve and protect the motor.
How do you check the range of an electric motor?
Check that the windings are not open or blown. Many simple “across the line” single-phase and 3-phase motors (used in household appliances and industry respectively) can be checked simply by changing the range of the ohm meter to the lowest offered (R X 1), zeroing the meter again, and measuring the resistance between the leads of the motor.
When do you need to read a motor nameplate?
You will need information from the motor nameplate throughout the life of the motor. If you ever need to size a VFD, repair a motor, replace a motor, connect a motor, correct power factor, purchase parts, or do just about anything with a motor you will need the information on the motor nameplate. Horsepower is the mechanical output of a motor.
What is the power factor on a motor nameplate?
# 15: POWER FACTOR (PF) Power factor on the nameplate is sometimes abbreviated as PF or P.F. Power factor is the ratio of active power (W) to apparent power (VA), expressed as %age. The power factor is also equal to the cosine (“cos”) of the angle formed by the lag between the current with respect to the voltage.
The motor standards can be grouped into two major categories: NEMA and IEC (and its derivatives). In North America, the National Electric Manufacturers Association (NEMA) sets motor standards, including what should go on the nameplate (NEMA Standard MG 1-10.40 “Nameplate Marking for Medium Single-Phase and Polyphase Induction Motors”).
What does Fla stand for on a motor nameplate?
The nameplate FLA is used to select the correct wire size, motor starter, and overload protection devices necessary to serve and protect the motor. Rated full load current is often abbreviated as ‘FLA” on the nameplate. Unbalanced phases, under- voltage conditions, or both, cause current to deviate from nameplate amps. #4: RATED FREQUENCY