I HAVE A 3 PHASE 480V. 50 AMP TED134050 BREAKER WHICH FEEDS A 45 K.W. TRANSFORMER.WHICH TRIPS OCCASIONALLY, NOT OFTEN. IT RESETS O.K. WHAT DO YOU SUGGEST?

You need a transformer to do that. I assume that you are in the USA and you have a 480V three phase service. With 480V three phase there is 277 volts between any two of the phases. There are transformers to drop 277V down to 220V.
A better solution is to ask your power company for 220V service. The power company owns the transformer and you only have to provide the in house wiring. .If you have a commercial establishment you have to meet all local codes and be inspected. If you don't the liability is very great.
Use a licensed electrician.

You can't convert a 3 phase transformer to single
phase 240 volt

208 volt is strickly 3 phase

The breaker that feeds the panel and the wire are what determines the rating. The panel has to be at least as high as the breaker. It can be more, and no problem.The problem I see is that the wiring is undersized for the 60 amp breaker. You should have #6 wires or change the breaker to a 50 amp. If that is not enough for your load, you must change the wiring. It also depends on the type of wire. THHN will have the largest amperage, but if it is TW, it will be lower. Rule of thumb would be #10-30 amp, #8-40-50 amp, #6-50-60 amp, #4-70-90 amp and #2-95-135 amp. There are other factors, such as derating etc. but if you wanted to increase to 100 amp, I would run #2 thhn. Hope this helps.

From what I found, 480 volt, 3-phase is 480 volts from leg to leg.
It is also 277 volts from each leg to neutral.
One can use a step down transformer to reduce the 480, 3-phase to 208 v, 3-phase and then each leg of the transformed voltage would be 120 volts to neutral. Try to locate the transformer in or near the chiller control cabinet.

A ground to neutral short should not stop the machine and may be how the breaker panel was wired. Single phase 240 volt power just has two hot lines and the neutral just center taps the transformer winding supplying the 240 volts. The twin breakers that supply this voltage, should both trip even if only one line has a short on it. Check the resistance of L1 and L2 lines to neutral that feed the motor with the breakers off. Each should read nearly equal resistance which usually is only a few ohms when correct. Make sure the motor turns freely by hand as a locked compressor can certainly pop the breakers. If the compressor appears locked, remove the cylinder head(s) and try to turn again. If still locked, one of the connecting rods may have broken in the crankcase. The other problem could be a broken valve assembly in a head. If the motor has a capacitor start and/or run capacitor, it can cause a breaker trip because the motor cannot start with a defective capacitor. Hope some of this helps!

amp draw will be 6.9 amps per leg cutout switch will be rated for 30 amp locked rotor per leg fan runs 5 amp draw continuous here is the web page it's pdf format. Liberty A/C Unit (FH245AUA00 - 480V 3 Phase http://www.rvii.com/bspdf/20x20x38.pdf.

More than likely, it's the element. They begin to 'leak' small current as they get old and this will trip the GFCI

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You have a low voltage short in the system. The only way to find where the short is is with a amp probe. Do you have any dogs that like chewing. i have had many cases where the outside unit has chewed up thermostat wires causing this. If you do not have the amp probe you may need to get a service tech to come out and find short

it is normal for a breaker that is run right on the edge (50 amp and your furnance to use 45) to get weak after a while . the first thing you should do is change the breaker with the same type and amp rateing . it should take care if it

What is happening is the white wire that comes off the breaker is probably too close to another neutral or too close to a hot wire that is on one of the other circuits that will make it trip when you use a drill etc... Check to see if the coiled up white wire off of the breaker is not near a hot in the panel. I have had lots of arc fault breakers trip for that reason.