The voting limits are well known to me and are also well explained on meta.so:
Post votes (votes on questions and answers)
Thirty post votes per day per user (includes upvotes and downvotes)
Up to ten additional question-only votes per day per user. These may be cast at any time during the day, but the exact number you get depends on your voting behavior for the day.
I've reached that limit many times before. Much to my surprise today I could vote 41 times in total before I reached the limit:
How can that be?