Submersible pump can not start the reason
1. Submersible pump power supply voltage is too low
Because the power supply voltage is too low to start the submersible sewage pump can not start, the submersible sewage pump is usually required 380V power supply voltage, the power supply voltage should be adjusted to 342V. Submersible sewage pump must be used in the emergency disaster relief drainage, and supply voltage is lower than 342V can take temporary measures: appropriate submersible sewage pump protection switch setting current and make the submersible sewage pump in use, protection switch not due to overload and frequent trip. But when in use should control submersible sewage pump stator winding current is not more than 11 times of the rated current, and control the use of time, make the submersible sewage pump is not due to the use of time is too long, overloading is too long, resulting in the stator winding temperature rise too high and overheating damage.
2. Submersible sewage pump power outages or power outages
In the use of submersible sewage pump, such as the cable core wire fracture, fuse, control protection switch bad contact, protection device action, caused by electric submersible pump stops running, should carefully check the fuses in the power supply circuit, control and protection switch and protection device is whether there is a fault to check whether it is power off phase, or power, or is due to fuse, control protection device and the switch action or exposure to adverse caused by phase failure or loss of power. Repair for the fuse, control protection switch and the protection device caused by power outages or outages; such as the interruption caused by power supply, should be restored to power supply.
3. Submersible pump impeller stuck
Due to the sewage pump impeller is water, debris and other stuck caused by submersible electric pump stopped, should check the pump, clear water, debris, etc., so that the submersible pump can operate normally.
4. Submersible pump cable is too small, too long and too big voltage drop
Caused the sewage pump power supply voltage is too low, the motor can not start. Processing method is when the submersible sewage pump use distance power far and long cable, voltage drop is too large, should be appropriate to be bold cable section: if the cable length is doubled, cable section should also be a corresponding rise in times.
5. Bad contact connector, submersible pump plug, switch etc.
Submersible sewage pump plug and switch connector contact caused by poor submersible electric pump can not be started when, should repair or replacement of poor contact of the connector.
6. Submersible pump heat protector action
In the use of submersible sewage pump due to thermal protection action caused by the stop, should be the first to check the reasons for the action of thermal protection. Such as diving sewage pump failure, should immediately find out and eliminate faults; if it is caused by the overload of the motor, should find and eliminate the cause of overload: such as whether it is caused by low voltage motor current is too large, or because of the impeller is debris around, turning poor. Whether the bearing damage, resulting in the stator and the rotor of the motor phase and rubbing the ambient temperature is too high. Because the heat protector action indicates that the submersible electric pump temperature has exceeded the rated temperature, should wait for the stator winding temperature is reduced, the thermal protector automatically reset, the submersible electric pump can be re run.
7. Submersible sewage pump thermal protection device damage
The treatment method is the first to check the cause of the damage of the thermal protector. If the thermal protector damage is caused by failure of submersible sewage pump, should immediately find and eliminate submersible sewage pump fault; if the thermal protector damage reason is due to the quality of the thermal protector caused or due to thermal protector use time is too long cause, change the number of the same type, the same specifications thermal protection device.
8. Submersible pump stator winding damage
Stator winding of submersible sewage pump damage, resulting in a stopped rotation, should first check the submersible motor stator winding damage causes, troubleshooting, and prevent further damage to the submersible motor stator winding; then the submersible motor stator winding disassembled, repaired, in accordance with the requirements to replace the damage to the stator winding.
9. Single phase submersible motor centrifugal switch contact is bad or damaged
Processing method is to first check centrifugal switch damage and failure of submersible sewage pump related, if diving sewage pump in the presence of faults should be immediately find and remove sewage pump failure, and repair or replacement of the centrifugal switch.
