Smart Curtain Motor Manufacturers introduces common sense of motor protection:

1. Motors are easier to burn out than in the past: Due to the continuous development of insulation technology, the design of motors requires both increased output and reduced size, so that the heat capacity of the new motor is getting smaller and the overload capacity is getting weaker; Due to the increase in the degree of production automation, the motors are required to run frequently in various ways such as frequent starting, braking, forward and reverse rotation, and variable load, which puts forward higher requirements for motor protection devices. In addition, the motor has a wider range of applications, often working in extremely harsh environments, such as humidity, high temperature, dust, corrosion and other occasions. All of these make the motor more prone to damage, especially the highest frequency of faults such as overload, short circuit, phase loss, and bore scanning.
2. The protection effect of the traditional protection device is not ideal: the traditional motor protection device is mainly thermal relay, but the thermal relay has low sensitivity, large error, poor stability and unreliable protection. The fact is also true. Although many devices are equipped with thermal relays, the phenomenon of damage to the motor that affects normal production is still widespread.