Problems with motor current
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:|:Q The motor was tested on a single unit one month in advance, with no abnormalities observed. Today, while testing the motor’s start/stop interlock, the motor tripped when started without a load; checking the current levels showed that they were very high, several times higher than normal. Newbie asking: What causes this? The motor isn’t waterproof – is it damp?
The reasons for abnormally high current during motor startup that leads to tripping may include the following: 1. **Circuit issues**: Check whether the motor is properly wired and whether the phase sequence is correct. Incorrect wiring or improper phase sequence can both lead to abnormal starting current. 2. **Motor is damp**: If the motor is started for the first time after being unused for a long time, it may be damp. The insulation performance of a moist motor deteriorates, leading to leakage or short circuits and causing a sudden increase in current. The insulation condition of the motor can be checked using a drying motor or an insulation resistance tester. 3. **Mechanical jamming**: Check whether the motor and the devices it drives are jammed or experiencing excessive friction. Excessive mechanical resistance can also lead to an increase in the motor’s starting current. 4. **Power supply voltage issue**: Verify whether the power supply voltage is normal. Too low a voltage can also cause the motor to draw more current; try measuring whether the supply voltage is within the specified range. 5. **Motor failure**: There may be internal damage to the motor, such as winding short circuits, and it is necessary for a professional to inspect the motor’s internal structure. It is recommended to identify the specific issue through a step-by-step elimination process and take corresponding corrective actions. If you can’t solve it on your own, it’s best to hire a professional motor maintenance technician to conduct an inspection and repairs. .
Check whether there is any jamming when manually rotating the motor (rotor). Whether the loaded equipment meets the startup conditions as required by the process; for example, the outlet valve must be fully closed before starting the water pump. For reference.
I’m not under load, bro:o
The reason has been found: the remote start circuit was loosely connected. At that time, I removed the wire and connected it again, and then everything worked properly:D