These pumps alternate each time and they are running on automatic level control. I would say each pump will run once every two to three hours, 30 minutes each time.
The breaker is 100 amp with a trip setting of 600 amp.
I understand that power outage could be the cause. However one pump tripped again yesterday afternoon and I don't believe there was a power outage then since the weather was pretty good and there was no rain.
We only run one pump at a time and we have seen both pumps tripped. It is interesting...
Thanks for the comments.
The check valve closing speed can be adjusted. We are trying not to close it too quickly to cause water hammer. We will add a 10-second delay to the pump so that it will not restart immediately after a power loss.
We will see how it works. However, I am still not...
raghun and dpc,
Thanks for your replies. What we found is that the pumps tripped the motor circuit breaker. When the operator reset it, they simply turned the power off and turned it back on. The pumps are closed-coupled end suction centrigugal type with constant speed drives. We did check the...
We have two 40-HP water pumps that pump water from a pressurized pipe to an elevated storage tank. The pumps have been tripping arbitrarily. Each time after they tripped, the operator just reset the power and then they worked again. It happens a few times a week. We could not figure out the...
