Podeschi,
Have you removed the existing fuse on the Modwright? If it has a F on the label it is a fast-blow fuse, if it has a T or S on it is a slow-blow. It may also be imprinted on the fuse housing. If it doesn't have a marking, and the fuse filament within is a thin wire it is a fast-blow fuse. If you see a thick wire that may have a small spring on one end it is a slow-blow fuse.
Have you removed the existing fuse on the Modwright? If it has a F on the label it is a fast-blow fuse, if it has a T or S on it is a slow-blow. It may also be imprinted on the fuse housing. If it doesn't have a marking, and the fuse filament within is a thin wire it is a fast-blow fuse. If you see a thick wire that may have a small spring on one end it is a slow-blow fuse.