China NEMA Series Single Asynchronous Motors - Reliable Suppliers and Quality Factory Products
Characteristic Description
NEMA series motors are fully enclosed self-fan-cooled motors. Its power rating, installation size and electrical and mechanical properties meet the requirements of the American Electrical Manufacturers Association (NEMA) standards.
This motor is novel, well-made, safe and reliable, and has the characteristics of low temperature rise, small noise and vibration, and large starting torque. It is suitable for occasions without special requirements, the highest ambient temperature does not exceed 40 ° C, the altitude does not exceed 1000m, and can be used as a power support for various mechanical equipment. NEMA standard motor frame and end cover made of high strength cast iron, corrosion resistance, long life, frame surface with heat dissipation hole, convenient heat dissipation.
Product Structure
NEMA standard MG1-1.25 to 1.27 defines 20 types of motor housings, including open motors, fully enclosed motors, and motors with encapsulated or sealed windings.
The 7 most common motor housing types are:
1. Open Drip Control (ODP)
Allows air to circulate in the winding for cooling, but prevents the liquid from descending vertically to a 15-degree Angle. Usually used for indoor applications in relatively clean, dry places.
2. Totally Enclosed Fan Cooling (TEFC)
Prevents the free exchange of air between the inside and outside of the frame, but does not make the frame completely airtight. The fan is mounted on the shaft and pushes air above the frame during operation to aid in the cooling process. Versatile for pumps, fans, and compressors.
3. Totally Enclosed Non-Ventilation (TENV)
Similar to TEFC, but without cooling fans and relying on conventional cooling. Tightly sealed to prevent free air exchange. Suitable for areas exposed to dust or general moisture.
4. Totally Enclosed Ventilation (TEAO)
Dustproof fan and blower load motor, designed for shaft mounted fans or belt driven fans. The motor must be installed in the airflow of the fan.
5. Totally Enclosed Flush (TEWD)
Designed to withstand high pressure flushing or other high humidity environments. Ideal for harsh environments.
6. Explosion-proof housing (EXPL)
Designed to withstand internal explosions of specific gas/vapor and prevent external sparks. Used in hazardous environments where operating temperatures must stay below ignition points.
7. Hazardous Places (HAZ)
Classified by the type of hazardous environment, material characteristics, exposure likelihood, and safe temperature thresholds.
Product Video
Product Parameter
For more product parameters, you can click to download！
Frequently Asked Questions
What standards do NEMA series motors follow?
NEMA series motors strictly comply with the American Electrical Manufacturers Association (NEMA) standards for power rating, installation size, and mechanical properties.
What are the main advantages of these motors?
They offer low temperature rise, minimal noise and vibration, high starting torque, and are constructed with high-strength cast iron for corrosion resistance and long life.
What is the difference between TEFC and TENV housings?
TEFC (Totally Enclosed Fan Cooling) uses an external fan on the shaft to aid cooling, while TENV (Totally Enclosed Non-Ventilation) relies on conventional cooling without a fan.
Can these motors be used in hazardous environments?
Yes, specific models like the EXPL (Explosion-proof) and HAZ (Hazardous Places) housings are designed specifically for environments containing hazardous gases or dust.
What are the recommended operating conditions?
The motors are ideal for ambient temperatures not exceeding 40°C and altitudes below 1000 meters.
What is an ODP housing type?
ODP stands for Open Drip Control. It allows air circulation for cooling while preventing liquids from entering the motor at angles up to 15 degrees, suitable for clean indoor use.