Hi guys

I want to turn a 3 phase pump on and off automatically with a float switch level sensor the motor is just a small 1kw motor controlled through a standard telemc contactor. I have attached links to the level switch i will be using along with the relay and relay base that i will be using too. i just need to know the connections or if possible and ideally a schematic of how to wire this in so the pump turns on at low level and stops at high level automatically.



Thanks guys





http://ie.rs-online.com/web/p/level-sensors-switches/0339730/













http://ie.rs-online.com/web/p/non-l...573743D333533393136267374613D3033353339313626







http://ie.rs-online.com/web/p/relay...573743D333533393636267374613D3033353339363626

 

http://www.exman.com/fsms.html

 

Switching direct with a low voltage coil on the contactor as per the preceding link would be the simplest.
BTW using the O/L's in the ground side of the coil as shown is considered an unsafe no-no now.
Max.