Circuits, Formulas and Tables Electrical Engineering - Basic Vocational Knowledge: 5. Contactor Circuits: 5.1. Types of Excitation of the Control

Circuits, Formulas and Tables Electrical Engineering - Basic Vocational Knowledge

5. Contactor Circuits

		5.1. Types of Excitation of the Control
		5.2. Possibilities of Representing Contactor Circuits
		5.3. Reversing Contactor Circuits
		5.4. Arc Extinguishing Circuits
		5.5. Three-contactor Star-delta Connection
		5.6. Squirrel-cage Induction Motor
		5.7. Sliping Rotor
		5.8. Interference Suppression
		5.9. Light-current Controlled Power Plant with Impulse Relay

Self-excitation

Advantage: no-voltage characteristic

Figure

Separate excitation

Figure

The contactor circuits are provided with permanent contact making

Control current locking

Advantage: By means of the control current locking contactor, no-voltage characteristic is attained in separately excited contactor circuits.