Transformer drawing 29x more current than it needs
It's probably just magnetising current

that transformer is after-all 300 times bigger than it needs to be to satisfy an 84 VA load

https://buy.wesco.com/General-Purpose-Multi-Use/GENERAL-ELECTRIC/General-Purpose-Transformer-60Hz-3-Ph-30-KVA/9T23B3872/p/78317300492-1

Oh, you can't multiply AC amps by volts and get watts,  what you get is VA. watts will be less, you need to use a wattmeter to measure watts.

Magnetising current it the current that flows in the transformer primary according to it's inductance