Mechanical and electrical protection is one of the main functions of basic control of an electric motor. In electrical protection, as every motor is subject to variations from the electrical point of view, there is therefore the convenience in protecting it. In general, the main protections required are against short circuit, overload, low voltage, open phase, phase reversal, https://www.mrosupply.com/popular_products/about-roller-chain-tensioners/ internal defects. The protective devices operate the shut-off mechanisms, in case of a predetermined condition.
In mechanical protection motors must be protected both for the protection of service personnel and against external influences damaging to the motor itself and must comply with the requirements of safety, accident and fire prevention. The motor housing is used to secure it to the workplace and to protect it according to the environment in which it is installed. It is designed in such a way as to encompass the various mechanical protection modalities to meet the requirements of the standards, regarding the installations and machines for which the engines will be destined. However, the mechanical protections fall into three categories: drip and splash proof, fully enclosed and explosion proof.