Motor tripping issue
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The unit has a motor that has stopped working several times for no apparent reason; it’s not due to overload or low current protection. What other reasons could cause this issue with the motor?
Special attention should be paid to the motor’s distribution cabinet, which contains various components such as relays; any fault in these components can prevent the motor from starting, resulting in the motor not reaching any speed and stopping after just a few rotations. Note: It’s also possible that the overload protection setting is too low; for example, if the overload protection is set at 5A, the motor’s current will exceed 5A during startup, causing the circuit to trip. Additionally, check whether the thermal relay is set to automatic reset – it’s better to change it to manual mode. This post was last edited by XJTZWKDPJ on 2007-12-11 21:09.]
Well, thank you for your answer. It’s like this: at first, there was no such problem when it was running. For example, after running for a few days, it suddenly stopped, but it could be started up again right away. Maybe after running for a few more weeks, the same thing would happen again. I don’t understand what the hell is going on with it
It could be a thermal protection trip, or it might be caused by a brief spark or a short circuit that leads to a trip; first check whether there is a problem with the relay.
Thank you. I’ll have someone check it tomorrow to see if there are any other possible causes; everything will be checked at that time
The poster can provide more details about the question: motor power, type of load, protection method, protection setting values, and so on. To answer generally, the reasons for motor tripping are related to both electrical and mechanical aspects. 1. Electrical issues: too low protection setting values, overcurrent, overvoltage, voltage loss, operation with an incomplete phase, malfunctioning protections; other issues include leakage current, undercurrent, and three-phase imbalance (where such protection mechanisms are available). 2. Machinery: Causes of overload. Check whether the load connected to the motor’s output shaft is functioning properly, whether it can start under no-load conditions (with the load disconnected), whether the motor bearings are in good condition, and whether there are any abnormal noises.