SOLVED - Borehole Pump: Soft Starter

[deonholt]

Good morning.

Soft Starter, 400V (3 Ph) for 1.5kW motor

This is what happens.

I start the pump and everything works as it should for ±20minutes and then the pump stops. All good pressure and nothing wrong with the performance. It is not because of air in the pipe as there are no audible air bubbles in the sprinklers. When switching on the pump again, I first have to press the "Stop" button and then the start. It wil not start without pressing "Stop" first. To me it means that there is something wrong with the soft starter. It is as if the starter does not "know" that the pump is off. Maybe it is a faulty contactor/relay that doesn't have enough power to hold it in?

I can send you a picture but the soft starter is in a box with only a red and green button. Is it serviceable so I can take it off and take somewhere to check it out?

Thanks.

 

Edited August 22 by deonholt

[Vaal]

You say it is sorted. What was the cause of the problem?

What about dry run protection kicking in?

Tia