Does the motor have something like an overload protector?
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Recently, the water ring pump on the unit has been overloading and shutting down automatically. After it stops, the power supply at the site cannot be turned on; it is necessary to call an electrician to the distribution room before the power switch can start the motor. Is there something like an overload protector in the power distribution room? I don’t understand anything about electricity.
There should be some form of protection; the overload caused it to trip. I’m not sure though what kind of protection you use – a circuit breaker?
There are mainly two situations in this case: 1. The thermal protection device trips (thermal relay, other protection devices); such protection devices have certain reset times and requirements (in some cases, manual reset is necessary)； 2. In cases where the motor switch trips, it is recommended that the person in charge consult an electrical specialist; replacing the circuit breaker with one that provides only thermal protection and no short-circuit protection should resolve the issue ；
1: Thermal relay trips; manual reset is required. But when this problem occurs frequently, it is necessary to identify the cause; generally, it is due to pump overload that leads to excessive current, and the outlet valve of the pump can be adjusted to a lower position. It could also be a problem with the pump motor; a three-phase resistance bridge test can be performed to check this. II: Motor comprehensive protector. Check the reason for the trip; it is usually overload, overcurrent, missing items, etc. (depending on the specific protection settings). Restart after excluding the cause. III: The motor protection temperature switch trips, caused by excessively high operating temperature of the motor. Reasons: superflow, sweeping across the chamber, excessive lubricating oil, etc. Check each item and rule out issues before use
It is possible that the overload current setting of the integrated protector in the power distribution room is too low, or it is possible that the motor is too small and thus subjected to excessive load, leading to overloading. You had better contact an electrician or the relevant person to find out what the cause is/
Don’t be careless about tripping – failing to check and reset it regularly can potentially burn out the motor. . . . If similar problems occur frequently, the circuit motor and AC contact points should be checked
It must be equipped with a protection device; it cannot start if the overload setting is not reset.
In simple terms, motor circuits are equipped with short-circuit protection and overload protection to safeguard the motor in abnormal situations. Overload protection is usually provided by thermal relays or motor protectors, which cut off the power supply to the motor for a certain period of time, depending on the degree of overload of the load driven by the motor, thereby preventing the motor from being damaged due to overheating. If stopping frequently occurs, one reason is that the load on the motor often exceeds the allowable limits. Another possibility is that the overload protection devices of the motor are set incorrectly or are damaged, resulting in false triggers even under normal load conditions. In such cases, a thorough inspection of the electrical components is necessary; if there are problems with the motor’s components, they need to be repaired or replaced.
The switchgear trolley is equipped with a comprehensive protector, and current overload protection may be provided
When the water pump is running, what are the actual values of the motor current, outlet pressure, etc.? Take measures based on the actual situation.