Some comments:
OP said:
These generators go down ALL the time.
That is not normal for generators.
It strongly suggests some variation in gas quality.
If you are at one of the newer mines burning flare gas, even more so.
OP said:
I had two not start yesterday at 5 degrees Until I did a temporary hookup as I stated.
It may be preferable for your standby set to use an alternate fuel.
If a slug of unsuitable gas takes out your generators, then starting the standby set on the same fuel supply may be problematic.
A plan to ponder:
Use an N+1 system.
Always have one more generator online than your operation needs.
One set going down will not shut down any servers.
Compare the fuel consumption with the same load spread across two sets versus spread across three sets.
The difference may be less than you expect.
Than express the extra fuel cost for a year in minutes of down time avoided.
Come off your bus to feed an auto-transformer stepping up to 480 Volts.
The 480 Volts will go to an Automatic Transfer Switch (ATS).
From the ATS go to a splitter and then to your packages.
Note, use N+1 for your main loads. The cold weather packages may be extra and need not counted in the N+1 scheme.
If the package load does slightly overload the prime rated sets, the package loads are small enough to be allowed under the occasional overload rating of the prime sets for the length of time it takes to get another set back online.
I hope that these are prime rated sets. If not, re-rate them as prime sets.
Add a standby diesel generator feeding to the ATS.
Operation:
Normally, the packages will be powered by your main generators.
In the event of the total failure of the main bus, the diesel generator will start and come on-line typically in less than 10 seconds.
Why diesel?
There are many more persons familiar with diesel engines than with propane powered sets.
The sets are available completely self contained, including fuel tanks.
There is always diesel fuel available even if it is siphoned out of vehicle fuel tanks.
Bill
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"Why not the best?"
Jimmy Carter