Utility transformer connections are not much different than ours. Some utilities may use a grounded phase system (same features as our Grounded B phase), they may even call it an "earth return" or a "common neutral". I believe low voltage grounded-B systems are much more common than similar medium voltage utility arrangements.
25 years ago I saw a 1-phase utility system that had only 1 wire on the pole, the earth was the only return path on the utility side.
