Electric motors need mechanical and electrical protection, both for safety for the service user and for accident and fire prevention.
The housing has the function of protecting and securing the motor in the working environment and basically comprises three categories of mechanical protection: drip and splash proof, to be completely closed and explosion proof. The electrical protection in turn is necessary against short circuits, overloads, low voltage and internal defects.
Each device acts to minimize damage to motors when subjected to various conditions such as internal and external problems or even inadequate load and they must be chosen according to the criteria of operating conditions and importance of the motor in the process.
If we request a mechanical power greater than the actual capacity of the motor, an overload can occur, causing a rise in temperature and if this heating is greater than the insulation of that motor, it may have a reduced service life. In this case, the protection devices, which have the function of shutting down the motor, are put into action, thus maintaining the internal temperature. https://www.mrosupply.com/lighting/lighting-fixtures/wallpack-fixtures/1429703_ffled18nwe_rab-lighting/