Open the switch pump after two or three laps to stop, according to the manual electromagnetic relay can play, but the three-phase electric motor protector showed no electricity, I measure, there are electricity, do not know what the reason is, please help me analyze several reasons for this situation, the most likely is whatThank you
I suggest you focus on your protector. If there is a correct power supply in the three-phase, then the protector can be shielded and tested. In addition, I do not know your pump brand and model, you can refer to your drawings, look at the protective circuit, this piece has no series of other protection functions. Waiting for your test results.
Most of them are electromagnetic relays. Try another one
You'd better stop the machine and stop using it before the trouble is solved, otherwise it will burn the motor! As you say, the phenomenon should be that the magnetic starter is missing. It is recommended to replace the magnetic starter. The current value must not be lower than the original configuration!
