Automatic Switch for generator and shore power ( one more time)

[DoubleEagle]

I think you right Sean or just leave the manual switch in place and forget about it,the manual switch works good it's just a pain to open the bay door and flip the handle every time

Yes, use the KISS principle, less chance for malfunction, and cheaper.

[Seangie]

I think you right Sean or just leave the manual switch in place and forget about it,the manual switch works good it's just a pain to open the bay door and flip the handle every time

Cliff - when I was still designing my bus layout I was excited about an auto transfer switch and looked into how I was going to set it up and how it was going to work.

I put it off because of cost but now 3 years later I think I just saved a bunch of money.

Ive gotta pull out all the cable and hoses and set it it up when I park anyways how much more effort is it throwing a manual switch when you are standing right there.

Some of the guys say its nice because if its raining and you lose power you can just start the generator but in my 3 years thats never happened.  If it happened once in the next 3 that would be once in 6 years Id have to get wet walking outside in the rain to switch it over.

Eh.  Manual works fine for me.

-Sean

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[bevans6]

The breaker should be sized for 125% of the measured maximum load, so I would be looking at sticking with the 80 amps per leg and getting a bigger transfer switch.  Or lose a couple of AC's or whatever other load shedding you are comfortable with.  You have you a lot of load, there...

Brian

[blue_goose]

You will need no less than 150 amp relays.  You can use the time delay that you have now and just buy the two relays.  Be sure to get the extra contact on the side so both relays can't pull in together.
Jack

[Timkar]

Clifford...Was just reading up on your inverter and I think best way is to keep manual switching...Your inverter doesn't like auto switching of the AC source unless it does it itself, or there is a minimum 30 sec time delay.  HTH...Tim

[bevans6]

I blew an inverter when the ATS switched to it with the AC on.  Blew all the output mosfets. 

Brian

[bandsaw]

Hello, I built a transfer switch with an Allen Bradley motor reverser. This reverser is made with two 90 amp contactors tied together a with mechanical interlock.  All of the RV transfer switches I looked at have Chinese contactors.  One brand of 50 amp transfer switch has 40 amp contactors in the box.   I  was able to find the Allen Bradley reverser at a motor surplus place in Portland. Even the surplus price was hard to swallow.   I have a 20KW generator with an 80 amp main breaker.

Thanks, Bandsaw

[Dave5Cs]

Clifford are you going to run a separate switch panel and breakers and auto Kill switch for the sewing machines individually or as a whole. Got to agree with Sean on that one.

D & D