What happens when phase sequence change?

When the phase sequence of a three-phase system is incorrect, the connected three-phase motors and other rotating equipment runs in the opposite direction. In many cases, this can cause a hazardous condition that may destroy product, damage machinery, and injure personnel.

What happens when the phase sequence of the voltage applied to the stator of a three-phase induction motor is changed?

If the phase sequence is changed to R-B-Y, the induction motor will rotate in opposite to its initial direction of rotation i.e. rotate in anticlockwise direction.

How is the direction of rotation of a 3-phase induction motor changed?

We all know that the direction of rotation of a 3-phase motor can be changed by reversing two of its stator leads. This interchanging, if you will, reverses the direction of the rotating magnetic field within the motor. And, after making the lead interchange, if required, the motor then can be coupled to its load.

What is the significance of phase sequence in three-phase system?

The phase sequence (or phase rotation) of a three-phase system governs the direction of rotation of three-phase motors and the division of the current among the three lines feeding an unbalanced load.

What is the forward sequence of 3 phase induction motor?

Forward & Reverse of three phase Induction motor: This is implemented by changing the supply phase sequence of the motor. Example: You have a motor (motor terminal U, V, W) which is connected with the phase sequence (Supply phase R, Y, B) of R-U, Y-V, B-W in a forward direction.

What happens if 3 phase motor is wired wrong?

If a 3-phase motor rotates in the wrong direction, you can swap any two leads to change to the desired direction. One way to test motor direction is to take your best guess on how to connect the leads, then run the motor and note the direction it spins. If you’re wrong, you undo two leads and swap the wires.

What do you understand by phase sequence?

REVIEW: Phase rotation, or phase sequence, is the order in which the voltage waveforms of a polyphase AC source reach their respective peaks. For a three-phase system, there are only two possible phase sequences: 1-2-3 and 3-2-1, corresponding to the two possible directions of alternator rotation.

What happens if you wire a 3-phase motor wrong?