Single phase to three phase current ratings for Circuit

Thread Starter


Joined Mar 22, 2022
Question - I have 3 single phase (220v) solar inverters, each of 5KW output, each feed into a three phase supply (to my house)
Each inverter is on a 32a 220v trip switch.
Question- what size trip switch should I use for the three phase trip that supplies these inverters? I am confused by this a bit.
i think the 4 pole breaker in my schema electric should be 16a?
Answer and explaination appreciated:)42BCBF50-5CCD-4951-A709-74128D6B3A35.jpeg


Joined May 3, 2013
3 single phase invertors do not make a 3 Phase invertor. The Synchronisation and Phase difference is to be maintained. Is it being done?

You question is not clear. How does "3 Phase" trip "supplying" the invertors come about? Is'nt the supply DC?


Joined Jul 18, 2013
What is the conductor gauge you are using, the wiring size current rating should not be of a lessor value than the means of protection!


Joined Jul 18, 2013
You show you have three 1ph circuits, Each with a 32a load, therefore, any disconnect prior to the this should be at least of equal sizing. 32A.