Motor over temperature is a calculated trip in the drive Common causes include overcurrent, overvoltage, undervoltage, overtemperature, communication errors, and mechanical issues with the motor or load There are quite a few factors that the drive takes into consideration when it is calculating this trip.
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This article discusses typical nema motor insulation ratings, winding temperature protection, preventing nuisance rtd trips and common causes behind motor over temperature.
If the drive goes into current limit either there is something wrong with the motor or the drive is reading the wrong current.
Motor overtemperature comes when the temperature of the motor has exceeded a safe operating limit Overheating can occur due to various reasons and can lead to damage to the motor and associated equipment if not addressed promptly. What does error motor temperature and red module led indicate This could be due to one of the motors of the transport assembly has drawn excessive current, causing the motor to become too hot
The processor has switched off the motor. The triggering threshold is provided by the electronic nameplate of the connected motor The motor temperature is measured either by a temperature sensor or by a thermal model. When thinking about motor overheating, the first cause that comes to mind is overloading
Mechanical overloading makes the motor draw higher current, leading to excessive heat
The motor can also overheat if the rotor is locked by an external force, drawing too much current. Overheating can occur at lower speeds due to reduced cooling, and direct temperature sensing is recommended for motors with external cooling systems Individual protection is required for multiple motors, and guidelines for automatic restarting and orderly shutdown must be adhered to. During normal operation, 1.6v dc is present between terminal 78 and drive common
When an open circuit exists between terminals 78 and 79, 24v dc will be present at terminal 78 to drive common If the 24v is missing, the pulse transformer board may need replacement.
