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close this bookElectrical Machines - Basic vocational knowledge (Institut für Berufliche Entwicklung, 144 p.)
close this folder5. Asynchronous motors
close this folder5.4. Circuit engineering
View the document5.4.1. Starting connections
View the document5.4.2. Dahlander pole-changing circuit (speed control)
View the document5.4.3. Rotational reversing circuit
View the document5.4.4. Braking circuits

5.4.3. Rotational reversing circuit

Mode of operation

Cp. section 5.3.4.

Circuitry


Figure 73 - Rotational direction turnover voltage (main circuit)


Figure 74 - Rotational direction turnover voltage (control circuit)

Circuitry description

Rotational direction selection without cut-off compulsion. The K1 is switched clockwise by actuating S3. K2 is locked in current path three by the openers of K1 and S3. K2 drive is switched counterclockwise by dead and simultaneous actuation of S2 and K1.