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.

À propos de FMP

FMP est une entreprise nationale de haute technologie spécialisée dans la conception, le développement et la production de moteurs et de solutions électromécaniques de pointe. Nous produisons principalement les moteurs des séries YE2, YE3 et YE4, ainsi qu'une gamme de produits dérivés. Notre gamme comprend également des moteurs triphasés et monophasés pour pompes hydrauliques, des moteurs à carter en aluminium, des moteurs non standard pour pompes hydrauliques, des réducteurs de turbine à intégration électromécanique et d'autres moteurs spécialisés.

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.

Outre notre gamme complète de produits, nous sommes fiers de proposer des solutions sur mesure adaptées aux besoins spécifiques de nos clients. Que vous ayez besoin de moteurs spécialisés, de produits non standard ou de systèmes intégrés, FMP travaille en étroite collaboration avec ses clients pour leur fournir des solutions sur mesure de haute qualité. Notre priorité accordée à l'ingénierie de précision et à la satisfaction client est le moteur de notre succès continu sur les marchés mondiaux.

Chez FMP, nous nous engageons à établir des partenariats à long terme et mutuellement bénéfiques, soutenant le succès de nos clients à chaque projet.

Auteur : CX