Had a service call last week...A/C split tripping breaker.
Suction head pressure OK,
Air flow OK,
Amperage draw OK,
Megger readings OK,
Customer NOT playing with T stat OK,

2 days later compressor blew...
relace whole unit under warranty, compressor not available

1 day later breaker keeps tripping

installed a time delay before the contactor and set for 5 minutes...

everything now works great..

this is an FYI posting.., hope it helps