I have a delfield 6000XL. It has been working fine up until three weeks ago..Now it trips the breaker 2-3 times every 24 hours. I have had an electrician out and two specialist refrigeration companies...paid plenty of money but problem still not fixed...Circuitry is fine, compressor seems fine, coils are clean. Doesn't matter where I plug it in, still have the same issue...

I have the exact same issue with the same freezer. Driving me nuts. Fix found?

The problem you describe is not very frequent but happent also before. The breaker trips either from oveload and this when the compressor motor find it hard to start up and the second reason from an electrical earth leak from a power point which is again compressor, fan motor and defrost heater. Manytimes everything look to work fine but leak oroverload happens periodicaly and from previus experiance the only way to identify problem is not can be done by just one or two hour visit of a technician but a longtime supervision in a workshop or from owner. This can happent by doing something else in the same room with fridge in order be able to identify if the breaker goes off during a defrost then is the defrost heater, during copressor starting thenis the compressor or compressor starting device or one of fan motors evaporator motor or condenser motor.
As you may understant this is one not easy problem since it only occur periodicaly but with full supervision can be identify especialy from an experience percon and there is not any other option.