No-load test of three-phase induction motor

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No-load test of three-phase asynchronous motor

Released Date: May 11,2021 Article Source: Shengzhou Senli Motor

The purpose of no-load test is to check the assembly quality and operation of three-phase asynchronous motor, and to measure the no-load current and no-load loss power of motor. The motor gradually increases the voltage to the rated value (380V), at which time the motor should operate stably without abnormal noise and vibration. The value measured by the ammeter is the no-load current, and the input power value displayed by the power meter is the no-load loss power of the motor. The no-load current should be balanced in three phases, and the average deviation between any phase no-load current and three-phase current should not be greater than 10%. The percentage of no-load current and rated current should conform to the values listed in the following table

Three-phase asynchronous motorThe insulation can be measured with a megohm meter, so the service life method can be used when no-load test, and today the Senli motor editor will take you to understand it.

The purpose of the no-load test is to checkThree-phase asynchronous motorThe assembly quality and operation condition of the motor are measured, and the no-load current and no-load loss power are measured. The motor gradually increases the voltage to the rated value(380V)At this time, the motor should run stably, without abnormal noise and vibration. The value measured by the ammeter is the no-load current, and the input power value displayed by the power meter is the no-load loss power of the motor. The no-load current should be balanced in three phases, and the average deviation between any phase no-load current and three-phase current should not be greater than10%The percentage of no-load current to rated current should conform to the values listed in the following table. Three-phase asynchronous motor no-load current as a percentage of rated current

Under normal circumstances, a more simple no-load test method will be used, that is, the motor is directly energized by the control switch, no-load start, the no-load current is measured with a clamp ammeter, the no-load speed is measured with a fixed centrifugal tachometer, and the no-load operation of the motor is observed to determine the quality of the motor.

The above content is composed ofThree-phase asynchronous motor manufacturersMori machineProvided, interested in this or want to know about our products can consult online message or call directly0575-8378-1127.

Keywords: Three-phase asynchronous motor manufacturers three-phase asynchronous motor Senli motor

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