How do you read motor nameplate data?

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).

What does a motor nameplate tell you?

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.

How do you read motor ratings?

Usually labeled as HP or kW, this is the measure of the motors ability to deliver the torque required for the load at a rated speed. hp = 0.746 x kW; conversely, kW =1.34 x hp. Time Rating or duty (DUTY). This designation specifies the length of time that the motor can safely carry its nameplate rating.

What is the nameplate reading on the machine?

Rated voltage — Motors are designed to yield optimal performance when operating at a specific voltage level, or a combination of voltage levels in the case of dual-voltage or tri-voltage motors. This value is known as the nameplate voltage.

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What is IM in motor nameplate?

The international standard IEC 34-7 gives the mounting type of the motor in the form of two letters, IM (International Mounting) and four digits. Figure 6 shows some of the most common designs. The motor slip can be calculated, since the nameplate gives the rated speed and frequency.

What is nameplate rating?

Nameplate rating means the maximum sustained power-generating capacity of the Generation Facility, including the continuous power output rating of any Energy Storage System.

What does SF mean on a motor?

Motor Service Factor (SF) is the percentage of overloading the motor can handle for short periods when operating normally within the correct voltage tolerances.

What is SF on electric motor?

The service factor – SF – is a measure of periodically overload capacity at which a motor can operate without damage. … A motor operating continuously at a service factor greater than 1 will have a reduced life expectancy compared to operating at at its rated nameplate horsepower.

Which power is mentioned on a nameplate of a motor?

8. Which power is mentioned on a name plate of a motor? 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 does code mean on an electric motor?

Codes are defined in MG 1-10.37. 2 by a series of letters from A to V. Generally, the farther the code letter from A, the higher the inrush current per hp. A replacement motor with a “higher” code may require different upstream electrical equipment, such as motor starters.

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