What will Happen if one Phase Supply Breaks while Motor is Running
Three-phase motors must be connected to a nominal voltage to function properly. If for any reason any of the phases that supply the motor are disconnected, the motor continues to operate with the remaining 2 phases. This is called phase failure or single phasing.
If a three-phase motor is operating and loses one of the phases, the motor will continue to operate at a reduced speed and experience vibrations. The current will also increase considerably in the remaining phases, causing an internal heating of the motor components. If the motor is not disconnected quickly, it will break down as a result of this increase in temperature.
This failure can be harmful even if it occurs when the engine is not in operation because, depending on the load, sometimes the engine is able to start even when only two phases are connected.
In short, a phase failure is never a desirable condition for the operation of an induction motor and appropriate measures should always be taken to protect it.
What will Happen if one Phase Supply Breaks while Motor is Running
Three-phase motors must be connected to a nominal voltage to function properly. If for any reason any of the phases that supply the motor are disconnected, the motor continues to operate with the remaining 2 phases. This is called phase failure or single phasing.
If a three-phase motor is operating and loses one of the phases, the motor will continue to operate at a reduced speed and experience vibrations. The current will also increase considerably in the remaining phases, causing an internal heating of the motor components. If the motor is not disconnected quickly, it will break down as a result of this increase in temperature.
This failure can be harmful even if it occurs when the engine is not in operation because, depending on the load, sometimes the engine is able to start even when only two phases are connected.
In short, a phase failure is never a desirable condition for the operation of an induction motor and appropriate measures should always be taken to protect it.
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