Electrical Power Systems Technology

(Elle) #1

Unit Objectives 403


Start-Stop Control with Safe-Run Feature
Start-Stop Control with Run-Jog Feature
Start-Stop-Jog Control
Forward -Reverse-Stop Control
Full-Voltage Starting
Primary Resistance Starting
Primary Reactor Starting
Autotransformer Starting
Wye-Delta Starting
Part-Winding Starting
Forward-Reverse Starting


  1. Describe dynamic braking for direct current (DC) and alternating
    current (AC) motors.

  2. Describe universal motor speed control circuit operation.

  3. Describe frequency conversion systems.

  4. Describe silicon controlled rectifiers (SCRs), triacs and diacs.

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