Considering the basic principles of protection of the operator responsible for the operation, there is a sequence of the essential elements related to the starting and the maneuvering of the engines. Thus, in the maneuvers the following elements must be highlighted: the sectioning, which can be operated only without load. It is used during the circuit maintenance and verification process. https://www.mrosupply.com/motors/dc-motors/general-purpose-motors/672131_cem3610t_baldor/ Therefore, short circuit protection is intended to protect the terminal circuit conductors and overcurrent protection acts to protect the coils from the motor winding.
The switching elements are normally used to activate and deactivate the motor in a safe manner, ie without any contact of the operator in the power circuit in which the larger current flows. It should be emphasized that in the analysis of electrical controls it is extremely necessary to make sure that they have the proper sequence, which will serve as the basic orientation for the design of any circuit. One of the points considered fundamental to the understanding of electrical commands is the understanding that the main functions of the elements when it comes to an electrical panel are to protect and preserve the operator and to provide a command logic.