What is the nameplate rating of motor?
When an electric motor is designed to operate at its nameplate horsepower rating, it has a service factor of 1.0, meaning it can operate at 100% of its rated horsepower. Depending on your application, you may need a motor to exceed its rated horsepower.
What are motor ratings?
Three Phase Motors
| MOTOR RATING | HP | APPROX. F.L.C. AT LINE VOLTAGE |
|---|---|---|
| 0.75 kW | 1 | 3.5 |
| 1.1 kW | 1.5 | 5 |
| 1.5 kW | 2 | 6.4 |
| 2.2 kW | 3 | 9.5 |
How do you read a motor rating plate?
The RPM listed on the nameplate is the shaft speed for the motor. The speed of the motor is directly related to the frequency of the line voltage and the number of poles in the motor. At 60 Hz, a 4 pole motor will rotate at approximately 1800 RPM (7200/4 poles).
How do I find motor rating?
Multiply the motor voltage by the full-load current. The result is in watts. Divide watts by 1,000 to give kilowatts. For example, 230 volts x 20 amps = 4,600 watts; 4,600 watts divided by 1000 = 4.6 kilowatts.
How are ratings calculated?
The process of calculating an average numeric rating is to get the total of all section ratings. Then, this total is divided by the number of sections in the performance document. So, if there were four sections in the document, the calculator would divide the total number of numeric ratings by four.
What do the ratings mean on a motor nameplate?
If these ratings are on your motor nameplate it typically means your motor is rated for inverter use. Consult your manual for more information. Duty is the length of time a motor can run without a cooling period. Most industrial motors are rated for continuous duty.
What does vt stand for on a motor nameplate?
CT stands for Constant Torque and VT stands for Variable Torque. If these ratings are on your motor nameplate it typically means your motor is rated for inverter use. Consult your manual for more information. Duty is the length of time a motor can run without a cooling period.
What is the third number on a motor nameplate?
The third number is the bolt mounting hole dimensions, some motors may have multiple holes for different mounting options. The letter is the type of frame, each type is provided below: The enclosure type displays information about how well the motor is protected from the environment.
What should be included on a NEMA motor nameplate?
The nameplate defines a motor’s basic mechanical design, electrical performance and dimensional parameters. NEMA requires specific data to be included on the nameplate, but manufacturers may choose to include other information to assist in the installation, operation and maintenance of custom motors or those manufactured for specific purposes.