Do you know what the motor protector does? Dalan Motor tells you that the role of the motor protector is to provide full protection for the motor. A device that alarms or protects the motor in the event of overload, phase loss, stall, short circuit, overvoltage, undervoltage, leakage, three-phase unbalance, overheating, bearing wear, and eccentricity of the stator. The basic common sense of motor protection is as follows: 1. The motor is easier to burn than in the past. 1 Due to the continuous development of insulation technology, the design of the motor requires both increased output and reduced volume, so that the heat capacity of the new motor is getting smaller and smaller. The load capacity is getting weaker and weaker; 2 Due to the improvement of the degree of production automation, the motor is often required to run frequently in various ways such as starting, braking, forward and reverse, and variable load, which puts higher requirements on the motor protection device. 3 motor application is more extensive, often working in extremely harsh environments, such as humidity, high temperature, dust, corrosion, etc., resulting in motor damage, especially overload, short circuit, phase loss, broom and other faults The frequency of occurrence is the highest. 2. The protection effect of the traditional protection device is not ideal. 1 The traditional motor protection device is mainly thermal relay, but the thermal relay has low sensitivity, large error, poor stability and unreliable protection. 2 Although many devices have thermal relays installed, the phenomenon that the motor is damaged and affects normal production is still widespread. 3, the development status of motor protection 1 motor protector has evolved from the past mechanical type to electronic and intelligent, can directly display the motor's current, voltage, temperature and other parameters, high sensitivity, high reliability, multi-function, easy to debug The type of fault after protection action is clear at a glance, which not only reduces the damage of the motor, but also greatly facilitates the judgment of the fault, which is beneficial to the fault handling at the production site and shortening the recovery production time. 2 Using the air gap magnetic field of the motor to detect the eccentricity of the motor, it is possible to monitor the wear state of the motor online. The curve shows the trend of the eccentricity of the motor. It can be found early that the bearing wears and the inner circle and the outer circle are faulty. Found that early treatment to avoid broom accidents. 4, the principle of protector selection 1 reasonable selection of motor protection device, to achieve full play of the motor's overload capacity, but also to avoid damage, thereby improving the reliability of the electric drive system and production continuity. 2 The specific function selection should consider the value of the motor itself, the type of load, the environment of use, the importance of the main equipment of the motor, whether the motor exits the operation has serious impact on the production system, etc., and strive to be economic and reasonable. 5, the ideal motor protector 1 The ideal motor protector is not the most functional, nor the so-called most advanced, but should meet the actual needs of the site, to achieve a unified economic and reliability, with a higher performance price ratio. 2 According to the actual situation of the site, the type and function of the protector are reasonably selected. At the same time, it is simple and convenient to install, adjust and use the protector. More importantly, it is necessary to select a high-quality protector. ----- Responsible Editor: Dalan Oil Pump Motor 02- Purchasing Consultant Copyright http:/(Dalan Motor) Reprint, please indicate the source http://news.chinawj.com.cn 1M Mini Measuring Tape,Small Retractable Tape Measure,Precision Tape Measure,Tape Measure Scale SHANGQIU CHAOYUE MEASURING TOOLS CO., LTD , https://www.equipmentool.com
Dalan Motor tells you what the role of the motor protector is.