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 happens if you miss the model number on a motor?
Carefully select the correct diagram. Incorrectly connecting wiring will damage your motor. The serial number and model number are used to identify the equipment with the manufacturer. Complete the form at the bottom of the page, or call us at 1-800-800-2261 to get your technical questions answered.
How did James Watt come up with the term horsepower?
Horsepower was a term coined by James Watt. He used this term to help market his steam engine. Remember to be conservative. Using an under powered motor or drive could damage equipment and lead to unnecessary downtime and expense. Motors are designed to run at the voltage listed on their nameplate.
What does CT and VT mean 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. Most industrial motors are rated for continuous duty.
Do you know how to read pump motor labels?
As we scour the fading label that contains a jumble of numbers and abbreviations, our brows will furrow in confusion. If this is you, it is ok because you are in the majority rather than the minority. Most with general knowledge can understand horsepower (HP), amps and volts but the rest will look completely foreign.
What do the numbers mean on a pump motor?
CAT numbers have varying formats, for example: UST1102, ST1152, B2854, or B854. The first format is one that follows the line of UST1102 and ST1152. The UST stands for an uprated motor, “ST-” translates to full rated. The same applies to square flange motors that begin with USQ and SQ.
What is the wiring diagram for a motor?
Motor Wiring Diagram U.S. ELECTRICAL MOTORS 12 Lead, Dual Voltage, Wye Start/Delta Run, Both Voltages or 6 Lead, Single Voltage, Wye Start/Delta Run Motors designed by US Motors for Wye Start, Delta Run may also be used for across the line starting using only the Delta connection.
What is the catalog number on a pump?
The key to finding the motor match is using any of follow identification numbers on the motor label. The most common identification number on the motor label is the Catalog number; because of its commonness it is the easiest to track a match. CAT numbers have varying formats, for example: UST1102, ST1152, B2854, or B854.
