It is an indication of how much of the input electrical energy is converted to output mechanical energy. The nominal efficiency of the motor in Fig. 1 is 93.6%. … A 30-hp motor with a 93.6% efficiency would consume less energy than a 30-hp motor with an efficiency rating of 83.0%.
How do you read motor specs?
- 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). …
- Horsepower Output (kW). …
- Time Rating or duty (DUTY). …
- Max Ambient Temp. …
- Insulation System Designation. …
- Speed At Rated Load (RPM). …
- Frequency (HZ).
What do motor codes mean?
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.
What does motor frame size mean?
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.
How can you tell if a motor is VFD?
Three major factors should be considered when determining if a motor is compatible with a VFD: the motor winding insulation, motor bearings and pump operating speed range.
How do you know if a motor is inverter duty?
Motor insulation systems that are rated for inverter use will be specified on the motor nameplate (or a sticker). These systems should have wire rated for a minimum of 1600 volt spikes, F or H class insulation, and will be processed with 100% sold resin in a vacuum pressure impregnation (VPI) system.
What does Cos mean on a motor?
Cos φ is the calculated power factor where φ is the phase angle between the voltage and current. It is indicated on the rating plate of the motor. The power factor cos φ is the ratio of the load’s real power to its apparent power, and is given by the equation. cos phi= P/S.
What does tE mean on a motor?
The motor time tE for increased safety motor is prime safety parameter. The higher value of time tE means insulating system of Ex e motor is able to withstand the locked condition for long time so motor will be more safe for long duration during in specified abnormal condition in hazardous area.
What does CYC mean on a motor?
CYC stands for “Motor Cycle” How to abbreviate “Motor Cycle”? “Motor Cycle” can be abbreviated as CYC.
Which power is mentioned on a name plate of a motor?
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.
How do I know if my motor is single phase?
With a multimeter, measure the resistance between motor frame (body) and earth. A good motor should read less than 0.5 ohms. Any value greater 0.5 ohms indicate trouble with the motor. For single phase motors, the expected voltage is about 230V or 208V depending whether you are using the UK or America voltage system.
What size is a 48 frame motor?
NEMA electrical motor frame dimensions
|NEMA Frame Designation||Frame Dimensions (inches)|
|42||2 5/8||1 3/4|
|42C||2 5/8||1 3/4|
What is a JM motor frame?
JM (Short) Shaft Extension
With a JM shaft extension, the distance from the inboard motor bearing to the seal face is shorter than with a JP shaft.
What is a 56C frame motor?
1/3rd to 3 HP 1800 and 3600 C flange with removable feet, our 56C Frame motors are suitable for a variety of commercial/industrial applications. These motors are electrically reversible and are protected with class F insulation for inverter duty applications. …