Load circuit
The main circuit , also known as the load circuit , is subjected to the load current of the consumer and represents part of an electrical circuit . It is formed from the main devices and the main lines. The main devices are flowed through by the main stream in a specific order:
- Electrical fuse
- Main switch
- Main contactor
- Motor protection switch
- consumer
The electrical lines and contacts in load circuits must be dimensioned so that the high currents that occur can be safely controlled. Power contactors with appropriate power contacts are often used for this. These are after to transfer power selected. A cross-section suitable for the current strength is required for the cables.
The control circuits are to be distinguished from the main circuits . Control circuits contain the necessary logic for controlling or locking the main circuits. Control circuits are often part of the circuits surrounding a programmable logic controller . Emergency stop circuits are also mostly part of the control circuits.
literature
- Hans-Günter Boy, Klaus Bruckert, Bernard Wessels: The master's examination in electrical control and drive technology. 10th edition, Vogel Buchverlag, Würzburg, 1995, ISBN 3-8023-1556-1 .
- Joachim Weinert: Circuit drawing in electrical power engineering. 4th edition, Carl Hanser Verlag, Munich and Vienna, 1981, ISBN 3-446-13436-0 .