Im looking for a circuit braker for arduino to shut off powerconnection between battery/charger and battery/ arduino. Basically shutting itself off. This is the best I have so far. Does it exist any better solution? Maybe a circuit braker with integrated programmable input?
why not use a contactor driven by a relay driven by the microcontroller
what current are you attempting to switch? DC or AC?
These are readily available for DC.......take you pick on current.
https://www.ebay.com.au/itm/225072584580
I think im looking for a contactor, but does it exist one that can be controlled with the arduino with integrated relay, Or do they all take 12v with relay? battery is 16v and mby 20A
This one says 240v AC and up to 30 amp. But I need one with dc too. I found this one. It says 250v ac and 50 DC. Does this mean that it can take up to 50v DC and 30 amp?
look at automotive relays, e.g. relay-automotive-spst-no-12vdc
the Arduino operates a 3.3V or 5v ralay which applies 12V to the automotive relay to operate it
which arduino are you using?
That is what the add says, it will do 30 amps at the listed voltages. You need to check if you are running a motor or something inductive.
Ok, listed voltage is maximum voltage. For lower voltage the amp can be higher, I guess? Is a contactor always possible to controll with a relay, I just take the wires from the pushbutton and plug it into the relay and controll the relay with arduino. I cant find a contactor with integrated relay, most of them seem to have pushbutton, not rly intended for arduino.
one has a arduino operating a relay (3.3V or 5V) which operates a second relay (selected to match the load volts/current) to switch the load
large relays are often called contactors, e.g. to switch a Jabsco_28520_pump I use a Schneider LC1D12P7 12amp Contactor
Ok, but what im looking for is a circuit breaker controlled by the arduino, maybe with a relay or integrated relay. The circuit breaker is for 12v DC 20/30 amp. and 16v dc 30 amp and 240v ac, normal, probably not more than 10 amp.
It would seem dangerous from a safety/lockout perspective--I doubt you are going to find a commercial product.
Why that, specifically?
arduino with smokedetector sensor activates circuit breaker automatically when detecting smoke. If a charger is connected to the battery it would stop charging when detecting smoke because circuit breaker cuts the connectiong between battery. I dont know what you mean... If a huamn flip the switch or the arduino flip the switch on itself.
weather or not cutting the power to the charger stops the fire or not I dont know. But i can use the arduino to shut the airvents and fans to stop oxygensupply first. then shut off the circuit to prevent battery from overcharging. I think both the charger and the BMS have overvoltage protection, but it seems like a simple feature to add, a circuit breaker with both physical switch and automatic switch for charging and battery output.
It's the automated reset of the circuit breaker that looks potentially to be a commercial lockout safety hazard. If a human turns the breaker off to work on the wire of the circuit, it could be remotely re-activated while someone was working on it. Or if a short in the wire tripped the breaker and the automated circuit kept on resetting the circuit. I'm not sure you'd find a commercial "circuit braker with integrated programmable input" to reset to on.
If you want a commonly available automatic turnoff circuit breaker, one possibility would be a GFCI -- a small current to ground will trip it to off.
are you thinking of a relay PCB with onboard Arduino, e.g. ESP0101S-RELAY-MODULE-TUTORIAL which has an onboard ESP-01
this is a very vauge specification - getting a relay/contactor which could meet such diverse requirement could be difficult
I agree with @DaveX if you detect a fault condition reseting the system should require human action not reseting automatically by the arduino
I dont have to be able to turn it back on automatically, just off. I can turn int back on manually, mby. If it is possible to get a circuit breaker that is both manual and automatic/programable and only program it to turn itself off, bot back on.
Hi,
Have you Googled;
arduino control circuit breaker
Tom.. 
A GFCI breaker (or outlet) + GFCI tester + relay would get you that functionality.
Yes, as you can see, my first post, this video. A steppermoter flipping the switch back and forth.
No response to the GFCI suggestion?
