Training Manual

How can the motor be returned to forward rotation?

• By stopping the motor by pressing the N.C. pushbutton.
• By stopping the motor with the N.O. pushbutton 1 (NOPB1) and pressing the N.O. pushbutton 2 (NOPB2).
• By pressing the N.O. pushbutton 2 (NOPB2).
• By pressing the N.O. pushbutton 1 (NOPB1).

What is the purpose of Experiment 1?

• To run a three phase motor in forward operation using a magnetic contactor.
• To implement a control and power circuit for the given motor operation.
• To test and troubleshoot common faults according to standard test procedures systematically.
• To run a three phase motor in reverse operation using a magnetic contactor.

What is the purpose of Experiment 2?

• To implement a control and power circuit for the given motor operation.
• To run a three phase motor in forward or reverse rotation using magnetic contactors.
• To run a three phase motor in forward operation using a magnetic contactor.
• To test and troubleshoot common faults according to standard test procedures systematically.

What is the purpose of Experiment 3?

• To implement a control and power circuit of a 3-phase motor with automatic reversion.
• To implement a control and power circuit for forward and reverse operation of a three phase motor.
• To run a three phase motor in forward or reverse rotation using magnetic contactors.
• To test and troubleshoot common faults according to standard test procedures systematically.

What happens when the coil of the contactor is energized?

• The motor will run in reverse rotation.
• The motor will run in both forward and reverse rotation.
• The motor will stop.
• The motor will run in forward rotation.

What happens when the start pushbutton is pressed?

• The motor stops.
• The motor runs in forward rotation with wye configuration and after a preset time, the controller changes the configuration of the motor winding to delta.
• The motor runs in both forward and reverse rotation with wye configuration.
• The motor runs in reverse rotation with delta configuration.

What can interrupt the circuit in Experiment 4?

• Pressing the stop pushbutton or when there is an overload in any of the two (2) motors.
• Pressing the N.O. pushbutton 2 (NOPB2).
• Pressing the N.C. pushbutton.
• Pressing the N.O. pushbutton 1 (NOPB1).

What is the purpose of Experiment 14?

• To test and troubleshoot common faults according to standard test procedures systematically.
• To run a three phase motor in forward or reverse rotation using magnetic contactors.
• To implement a control and power circuit of a motor starter with WYE / STAR starting configuration and DELTA / MESH running configuration.
• To implement a control and power circuit for forward and reverse operation of a three phase motor.

What must be properly interlocked in the control circuit?

• The delta contactor can be activated when the star contactor is activated.
• The star contactor can be activated when the delta contactor is activated.
• The star and delta contactors can't be activated at the same time.
• The star and delta contactors can be activated at the same time.

What must be incorporated in the control circuit?

• A short circuit protection.
• Indicating lamps for the motor operation and for overload.
• A separate circuit breaker.
• A magnetic contactor.