Meat Mixer Motor factory,There are three main reasons for motor failure:
First, power supply problems, such as fuse burning, circuit breaker damage, control line failure so that the contactor is not closed or contactor damage;
Two, the motor itself, such as coil phase short circuit, grounding, bearing stuck, rotor fracture, etc
Three, the load is too large, resulting in motor overload or even unable to start. 1. Power supply detection: first, press the motor stop button to ensure that the power supply contactor is not closed. At this time, use a multimeter to measure whether there is power supply at the output end of the circuit breaker. The voltage between each two phases of the three phases is 380V, and the voltage between any phase and the zero line is 220V.
2. Fuse detection: disconnect the power supply, take out the circuit breaker and measure whether its resistance is close to 0 ohms with a multimeter. If there is no resistance, it indicates that it has been damaged. You can also use a multimeter to directly measure whether there is 220V voltage between the output terminal of the fuse and the ground cable. If there is no indication that the input terminal or the fuse is damaged.
3, control line detection: if the power supply is normal, it is necessary to disconnect the main circuit breaker or disassemble the motor into the line. At this time, press the start button, and then use a multimeter to measure whether there is voltage at the wiring terminal output to the motor (if there is a time relay, wait for its action to measure). If there is voltage, the fault lies in the motor, if there is no voltage, the fault still lies in the control line.
4. Time relay detection: if there is a time relay in the control line, check whether there is a power indication after it is connected. If there is an indication, check whether the contact moves after it reaches the set time.
5, motor inspection: in its Angle connection method, use a multimeter to measure the resistance of each pair of windings (that is, between two terminals) is symmetric, if not, the motor has been damaged. If it is symmetrical, use a shaker to continue measuring the direct resistance of each relative shell not less than 0.5 megohm, otherwise it indicates damage.
Check and then choose whether to replace the motor.
