The projects envisage the delivery and 15-year maintenance of seven double-deck electric trains, 35 single-deck electric trains and 20 push-pull electric trains, the transport ministry said in separate announcements published in the public procurement register.
All of the trains will be zero-emission, with the contracts also covering staff training.
The transport ministry cancelled the previous tenders in June due to significant changes needed to be made to the contract terms, which would change the scope of potential bidders, public procurement register data show.
The contracts will be co-funded from the EU-backed National Recovery and Resilience Plan and the state budget.
The deadline for submitting offers in all three tenders is October 30.
(1 euro = 1.95583 levs)