Detection device for motor

Abstract

The invention discloses a detection device for a motor. The detection device comprises a phase sequence detection module and a first indicator light. A first wiring point of the phase sequence detection module is connected with a first phase of a power supply, a second wiring point of the phase sequence detection module is connected with a second phase of the power supply, a third wiring point of the phase sequence detection module is connected with a third phase of the power supply, and the phase sequence detection module is used for detecting phase sequence connection of the power supply; the output end of the phase sequence detection module is electrically connected with a first switch and controls on and off states of the first switch according to detected phase sequence detection of the power supply; one end of the first switch is electrically connected with a null line, and the other end of the first switch is electrically connected with the motor; the first end of the first indicator light is electrically connected with the first phase of the power supply, and the second end of the first indicator light is electrically connected with the motor. The phase sequence of the power supply is detected through the phase sequence detection module, connection correctness of the phase sequence of the power supply is guaranteed, and the problem that the phase sequence of the power supply is reversely connected, the motor rotates reversely and consequently the service life of the motor is influenced is solved.

Description

technical field [0001] The invention relates to the field of electrical equipment detection, in particular to a motor detection device. Background technique [0002] At present, when the motor is tested, the lead wire of the three-phase power supply is usually electrically connected to the AC contactor, and the lead wire of the AC contactor is connected to the motor to realize the power supply test of the motor. However, both three-phase power supplies and motors have phase sequences. During the power-on process, it is easy to reverse the phase sequence of the motor and the phase sequence of the three-phase power supply, causing the motor to reverse, thus affecting the service life of the motor. Contents of the invention [0003] Based on this, it is necessary to provide a motor detection device for the problem that when the motor is detected, the phase sequence of the motor and the phase sequence of the three-phase power supply are reversed, causing the motor to reverse ...

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a motor detection device for the problem that when the motor is detected, the reverse connection of the phase sequence of the motor and the phase sequence of the three-phase power supply will cause the motor to reverse and affect the service life of the motor.

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