Ramp has two separate types of limits. You have your business limit, which can be viewed here.
Your business limit is the total amount that your company overall has available to spend. At any point, you can pay this balance down manually by clicking "Payments" before your statement arrives.
Additionally, you have the ability to set card limits as well. Card limits do not refresh when you pay your balance off to Ramp, but refresh during the period that you set. For example, monthly cards will reset on the 1st of every month, daily cards reset every day, etc.