Conversion Kits Conversion Kits EntelliGuard* TU Conversion KitUpgrade and conversion kits are ANSI C37.59 design verification tested to ensure safe, reliable operation. These kits extend the life of your mechanically sound breaker. Product Selector Publications BrochuresInstallation and Instruction Other Conversion Kits & Trip Units Previous Generation Conversion Kits & TU Trip Units Conversion Kits