3. When the motor is connected to △, if the internal phase of the motor is disconnected, the motor becomes V-shaped, the phase current and the line current are proportional to the motor load, and the two-phase current is increased by 1.5 times, and the current of one phase is increased to 1.5 times, the current of the other two-phase line is increased by about 0.9 times.
It accounts for a certain proportion of the proportion of the motor that produces phase loss, which is represented by: circuit breaker and fuse.
1. Circuit breaker: Many times the operator of the equipment likes to use the circuit breaker as a switch to stop the operation.
Circuit breakers are non-regular electrical equipment. If the load is pulled, and the type of protection motor is wrong, it is easy to produce phase loss.
2. Fuse: Faulty fuse, due to frequent positive and negative reversal of the motor, causing single phase grounding of the main circuit of the motor.
Non-faulty fuse, fuse fuse capacity selection is too small, the installation is not reasonable.
3. Contactors: the selection is unreasonable and the installation is unreasonable.
4. Thermal relay: the matching is not matched, the installation is not up to standard, and the debugging is not in place.
5. Quality reasons for the motor itself
The main performance is the poor connection of copper and aluminum, and the welding of the outer leads of the winding is poor.
HuataoElectric Motors included Ordinary Motors , Explosion-proof Motors, Variable Frequency Motors, High Voltage Motors, Wind Power Motors, Marine Motors.
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