I have a question regarding a relay based water pump setup which is triggered by a float sensor in the water tank.
As you can see in the figure, I have two relays which are single phase AC. Both relays are RM22LG11MR Schneider.
Data sheet are hereSchneider electric
Numbers 11, 12, 14, A1 and A2 are based on European EN50005 relay terminology as indicated here. Though there is not much info
The actual setup is like this that as soon as water level in the water tank (not shown in the figure) falls down, the float sensor activates relay 1 via the "Min" connection. Note that relay 1 is in "Fill" mode
The "12" pin from Relay 1 charges the relay 2. But Relay 2 only activates the waterpump when the water level in the pump is above E2.
The connection 14 of Relay 2 is directly connected to the power cable of the waterpump.
Later if the water in the pump falls below E1, the pump stops pumping water in the tank.
As relays are AC, A1 and A2 can be swapped, and hence A1 is connected to main power supply.
But i am not sure what is the difference between 11, 12 and 14 in this case, and if the connections in the figure fit the purpose. Any help would be appreciated. Thanks