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Hi,

 

I'm building a pump controller with my raspberry.

 

The idea has been taken from http://www.techjava.de/topics/2014/01/basement-drainage-pump-control-and-iot/

 

I have an automatic pump like http://www.valco.eu/sitemanager/file/r_4_installation-dernajo-liqua_1.jpg

I control the current and if it is out from specific range for a specific time I switch off the pump and send an alarm.

To control the current i use amp clamp but to switch off I need a more powerful relay  ThinkerForge  has a Dual Relay Bricklet but support not enough Amp (when pump self start ) drained by pump.

 

There is a Solid State Relay AC 380V/25A but I'm worry about Temp.

 

Is the possibility to use a relay like a SONGLE SLA 05 S L C.  Or something to substitute to the solded relay or the PCB has to be rebuild.

 

 

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I think the best option for you would be to buy a "proper" DIN-Rail mounted relay and to control this relay with a Industrial Quad Relay Bricklet.

 

With this setup you can buy a big relay that can handle your pump easily and the Tinkerforge stuff is galvanically isolated from the switching itself!

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