Is a motor start relay switch needed for a 3ph 2.8kw pump motor?
It's been a while for me working on 3ph motors! I forgot most of what I learnt!
I have a 3ph 2.8 kW water pump with a start/stop relay that's on it's way out. The relay welded itself closed well before I got to this farm (4 years) which proved to be an advantage for me. I don't have to walk down to the pump to start it. I just flick the breaker at the board.
From memory and it's been a while, 3 phase motors under 5hp don't actually need a start/stop relay unless it's for (machinery) safety in a big plant. Is that correct or am I off by a mile?
This is just a small water pump on the river.
I was planning on just bypassing the start relay straight to the 3 phase switch.
I thought I should consult the brains trust first! You fellas always seem to talk some sense into me before I do something silly!
The relays are cheap but I like the convenience of starting/stopping the pump up at the workshop instead of trudging down the the river to get it going. I can't be bothered setting up a remote control but will if it's needed.
Any thoughts?