YDT Series Three-Phase Consequent-Poles Asynchronous Motor for Fan and Pump

YDT Series Three-Phase Consequent-Poles Asynchronous Motor Operating Conditions

1 、Ambient temperature: to be altered with the change of seasons but do not exceed40℃

2、Altitude: to be used lower than 1,000 meters above sea level.

3、Rated frenquency:50HZ

4、Rated voltage:380V

5、Duty:continuous(s1)

6、Metod of starting: can be started directly on full voltage for all sizes of motors.

YDT Series Three-Phase Consequent-Poles Asynchronous Motor Technical Data

Technical data

Three-Phase Motor Overload Protection

When a motor is overloaded for an extended period, and the temperature rise of the motor winding exceeds its allowable limit, the insulating material can become brittle, reducing its service life and potentially causing severe damage. The larger the overload current, the faster the motor reaches its maximum allowable temperature rise. Commonly used overload protection components, such as thermal relays, are designed to address this issue. A thermal relay operates as follows: when the motor runs at its rated current and the winding temperature increases to the rated value, the relay remains inactive; however, if the motor experiences an overload, the relay will act based on the magnitude of the current—slower for smaller overloads and quicker for larger ones.

Considerations for Thermal Relay and Short-Circuit Protection

Due to thermal inertia, a thermal relay does not respond instantaneously to short-duration overloads or short-circuit currents. As such, it’s essential to supplement the thermal relay with short-circuit protection. For this, a fuse should be selected with a melting rating that does not exceed four times the rated current of the thermal relay’s heating element.

Environmental temperature differences between the motor and the thermal relay can affect the reliability of the protection system. Some thermal relays use thermistors embedded within the motor winding to provide more accurate temperature measurements of the winding. Overcurrent protection is commonly used for DC motors or wound-rotor asynchronous motors. However, for three-phase squirrel-cage motors, short-circuit protection is typically unnecessary, as short-term overcurrent does not lead to significant damage.

About FMP

FMP is a national high-tech enterprise specializing in the design, development, and production of advanced motors and electromechanical solutions. We focus on producing YE2, YE3, and YE4 series motors, along with a range of derivative products. Our product offerings also include three-phase and single-phase motors for hydraulic pumps, aluminum-housing motors, non-standard motors for hydraulic pumps, electromechanical integration turbine gear reducers, and other specialized motors.

FMP’s products are extensively used in industrial automation, serving key sectors such as CNC lathes, shoemaking machinery, woodworking machinery, metalworking machinery, plastic machinery, and construction machinery. With a strong commitment to innovation and quality, FMP ensures that all products meet the highest performance standards.

In addition to our comprehensive product range, we are proud to offer custom solutions tailored to the specific needs of our clients. Whether you need specialized motors, non-standard products, or integrated systems, FMP works closely with clients to deliver high-quality, bespoke solutions. Our focus on precision engineering and client satisfaction drives our continued success in global markets.

At FMP, we are dedicated to building long-term, mutually beneficial partnerships, supporting the success of our clients with each project.

Author: CX