The protection of LV motors

All electric motors must be designed to meet the requirements of specified operating conditions, and cannot operate outside these without the risk of immediate or long-term damage to the motor itself and/or to its environment. In order to eliminate this risk, or at least reduce it considerably, machine designers and installers provide protection devices selected from manufacturers’ catalogs. But which of all these existing devices should be provided, given that they must “interact” (operate) with isolation and control equipment? How do we choose? And, above all, how can we be sure that the chosen equipment will be fully compatible? This “Cahier Technique” is designed to answer these questions, by describing all the factors to be taken into account and then detailing the various solutions offered by manufacturers, including complete units known as “motor starters”.