230V Automatic Alternating Switch for Two Fans in Transformer Ventilation System

I used a 120V installation in my house because I had brought all my household and workshop equipment from the USA as part of my resettlement property. I used 230-120 transformer inverters for 3 phases (3 separate transformers placed in a cupboard).
Due to the fact that the equipment heats up, I have used forced ventilation in the form of 2 fans. I therefore need some kind of automatic 230V switch to switch one fan on alternately while the other one rests and cools down, because after continuous operation for several hours the fan fails if it is not switched off. I cannot use a large fan due to lack of space.
So far, I have switched the fans manually - but this is not a good solution, especially when you are away.

I tried to use a timer control, but the problem is that there is not one (I have not found one anywhere) that switches the control between the two fans alternately.
If you use two separate controls, then after a certain time, despite the same settings, the on and off cycles overlap. After a few days of operation, for example, after setting 30-minute on and off cycles, there are shifts and therefore both fans work at the same time and then both are switched off.
In addition, there is not much room for installing two separate control units.
Ideally, there should be only one device that switches the power supply between the two 230V outputs at a regulated time.
Maybe someone knows what kind of device this could be, but it must be adjustable in time, not necessarily infinitely variable, and small in size.

Added after 18 [minutes]:

andrzej lukaszewicz wrote:

Passing the point a bit, who took away such an installation from you? And aren't you afraid that you might burn down your house, because by attaching more devices you might unknowingly exceed the capacity of these transformers. The apparent savings of cheaply purchased equipment will be spent in a few years on losses in these transformers. An idea with no future, because when you start replacing worn out/damaged equipment, will you also have to import it from the USA? I sympathise.

Thank you for the nice post.Too bad it is off topic.
I will not argue with its content , because the knowledge of 120V installation as you can see is alien to you. The purpose of a solution such as mine is not the subject of this question and I do not expect an answer to it.
On the subject of the equipment I use, I will not comment on the forum, which is supposed to be used for something else: suffice it to say that I have been using my washing machine for 9 years without breakdown - and my neighbour has already replaced three appliances during this time, not to mention repairs.
Therefore, do not feel sorry for me - or rather for yourself?

See here: http://www.fif.com.pl/produkt/36/1197

I will take a look at the offer at this link - thank you for that.

I am not interested in them, as I wrote above, nor are they the subject of at least this forum.

Chill out forumer and pull your knickers up. It will be safer for you that way.
Safety is safety so don't puff yourself up or you might burst from its excess.
I've thanked you for your good contacts and that's enough of this Versailles. You are not responsible for my safety - so get lost in the thread where there are patsies like you who once can't say enough about what's going on. No one expects you to show off your forum pseudo-intelligence.
So much for that.

Moderated By kozi966:

We will not tolerate such a tone here. 30 days rest from the forum.
3.1.6. Dissemination of content contrary to the rules of social conduct and good morals.
3.1.7. Dissemination of content of an offensive nature or in breach of current ethical standards.
3.1.9. Disseminate content that is ironic, ridiculous or malicious, and which is disrespectful to other Users or third parties.
3.1.17. Publish posts which lower the general level of discussion..

vodiczka wrote:

.... - safety is paramount and the contributions of all electrode participants, both questions and answers, are assessed with regard to safety.

Apparently, who judges "safety of speech". Rather, I should ask who has sufficient knowledge in the area being discussed to judge what is and what is not safe ? Who takes responsibility for this ?

vodiczka wrote:

Erbit wrote:

As if who judges "security of expression".... Who takes responsibility for it ?

It is not about safety of speech but about safe solutions...

I also asked about this.

So once again: who has the knowledge to judge what is and what is not "with art" in every (different) topic and to make an opinion based on such a judgement ?

I can also ask in another way: what guarantee do I have that what I read on the forum is safe after such a verification ?

I can also answer you: none, because it is a mere "whim" of the assessors and not any "expertise".

vodiczka wrote:

... do you consider criticism of three transformers in a cabinet cooled alternately by two fans (because one overheats and fails after a few hours) to be a "vision" ....

Yes, I believe that in this case you have no knowledge other than a "specter".

vodiczka wrote:

... You don't need to be an expert electrician, just basic engineering knowledge to know that such a solution is for d....

I believe the same. However, I will never dare to write that "forum solutions are safe because they are moderated by you and other forumers". Following this line of thought, you have no authority to "verify what is and what is not safe" especially since it is just your "opinion".

[edit]
EOT

I used the PCM-04 relay and this is exactly what I had in mind. It works perfectly and meets my requirements, additionally protecting the transformers which, although they can, according to the instructions, operate without cooling and have their own factory overload protection, in the metal cabinet in which they are located, they now also have air exchanged by two alternating fans. The switching time is now set at 30 minutes. It's just a pity that the relay had to be brought from the other end of the country and could not be bought from the first better wholesaler.


To Erbit: Thank you for your common sense, which is difficult to find these days.

I consider the topic closed.