hi any1 have clue on how can i make an ATS (automatic transfer switch) even if slow transfer using arduino ?
i have 2 power sources to power up some machines i now have big 3 position manual button ...
i want to have this controlled by some logic that does the ats when on side of the power source fails, what device can i use ???
(i'm searching google)
regards
Now i'm using something like this
hi, i want to be controlled by arduino because late i want to be able to remote switch between sources....
And also because i want to use one power source or the other based on the time of day...
lets say from 08.00 to 16:00 i want power1 and from that on power 2...
How can i do this with relays needing to switch over 3 cables
positive, negative, earth 220v 10amp, max.
thanks
hi,
earth i agree no need to switch, but neutral and hot i would need..
complete diferrent power sources.
i will make some investigation and draws to explain better..
imust be sure that power sources never short cicuit between them...
regards
You do NOT want to switch earth/ground
Yes and no. Ground, of course, must be continuous throughout the system. The Neutral however must be bonded to ground in exactly one place. This may, depending on the rest of the circuit, require a relay to switch the Neutral/Earth bonding.
I'm curious what are the two sources of power? If one is an inverter, likely your best bet is to use an inverter with an integrated transfer switch. If one is municipal/public grid, then you will instantly run afoul of certification requirements for your circuit.
And finally, to give the usual drum a bang or two: if you have to ask here about any of this stuff, then you are not qualified to do it. Don't.
powerso
urce1: inverter from batts (solar panels and wind gen).
powersource2: grid public grid...
i have this now in manual mode with switch in my first post..
just wannt to add some intelegence and logging..
thannks
yes, instaled by me,
if i use 2 pole relay i can switch neutral and positive, right?
like inverter on nc and mains on no...
does this kind of relay isolate well i mean one side never get in contacty with the other ?
thanks
Is it important that there be a 'glitchless' transfer between the power sources? I suspect not as you are presently using a manual break before make switch? In many industrial UPS installations the ATS circuitry must be integrated or coordinated with the UPS system such that the UPS AC power output is always forced to be in sync with the alternate AC power source. This allows for a 'bumpless' transfer of power without any effect of the load side being powered. This allows for a running UPS system to be taken out of service without interruption of the load, it's a make before break transfer system that requires a lot of extra details and costs to operate correctly.
I've seen high reliablity (and high cost) ATS switches that utilized both high power SCRs and contactor switch contacts. The SCRs are used for the actual zero crossing power transfer and then the machanical contactor is used to eleminate the voltage drop of the SCRs for more effiecent operation by shorting across the SCRs. AC power switching can be quite complex and expensive depending on the actual requirements and industrial/utilities compliance issues.
Lefty
hi & thanks to all your answers.
Now i use a manual switch that have 3 poles and 3 positions .
Source 1 - OFF - Source 2.
After the switch i have an APC UPS that manages the peaks and momentary lost of power
P1----
--- Switch------ UPS-----Load
/| |
P2----/ | arduino now
|
Arduino Future
My main reason to get rid of the manual switch is so i can automate the hours where it run from solar/wind and when it runs from the grid.
Later it will switch triggered by the amount of energy being produced by the solar/wind system.
i already have a arduino board controlling the battery levels and give me information about it.
i made a small computer program to combine with arduino code that talks to arduino and let me interact and also feed time to arduino.
So now i'm more less doing this but at the ups level behind the ups, but i manually have to chose what power is going to ups i want to control both points, entry point to ups and ups inernall bats/ or external power ... that's why was my question..
i will buy a 2 pole ssr relay and add it to the system and give feedback.
Do you recommend any relay working with arduino 5v ?
thanks
ssr relay
I don't think this is a suitable application for a solid state relay. You want a good old-fashioned metal contacts one. A relay that can safely switch 15A of 230VAC will be sizable and you will not be able to actuate it directly from the Arduino. You will need a darlington or MOSFET to drive it, and the coil will be 12V likely. There will be 100s to choose from.
Maybe a KUP-14D15-12 (Mouser 655-KUP-14D15-12)
And, as a reminder, if you have to ask any of this here, you are not qualified to do it. Don't.
understood, Thanks