Wis. Stat. § 785.05: Limitation on imprisonment.

In any case in which the contempt of court is based upon interference with visitation rights granted under s. 48.925 (1), or upon failure to respond to a citation, summons or warrant under s. 345.28 or any other failure to pay or to appear in court for a nonmoving traffic violation, the court may not impose imprisonment as a sanction under this chapter.