Circuit Breakers - Upgrade, Retrofit & Retrofill Circuit Breakers - Upgrade, Retrofit & Retrofill Medium Voltage RetrofitsDirect replacement circuit breakers are interchangeable and can be inserted directly into existing switchgear Power Break II RetrofillServes the needs of end-users with both fixed-mounted and draw-out versions of the Power Break I breakers. Field upgradeable to EntelliGuard* TU trip unit. SACE Emax 2 Retrofill Circuit BreakerAdvanced retrofill solutions for AK, AKR, WavePro power circuit breakers EntelliGuard R RetrofillRetrofill existing metal frame breaker cubicles with an EntelliGuard G breaker. Offers the option to include the EntelliGuard TU Trip Unit. Tmax XT Retrofit Kit for Spectra Panelboards & SwitchboardsRetrofit Kit for Spectra™ Plug-In and Bolt-on Panelboards & Switchboards Related Videos Modernization Retrofits Publications Application and TechnicalBrochuresCatalogs and Buyers GuidesCertificates/Declarations of ConformityConnection DiagramData SheetsDrawings-Outline and DimensionalInstallation and InstructionPresentationsRenewal PartsTime Current CurvesWhite Papers Other Upgrade, Retrofit & Retrofill Automatic Transfer Switches (ATS) - Upgrade, Retrofit & Retrofill Circuit Breakers - Upgrade, Retrofit & Retrofill Conversion Kits & Trip Units - Upgrade, Retrofit & Retrofill Load Interrupter Switchgear (LIS) - Upgrade, Retrofit & Retrofill Motor Control Centers (MCC) - Upgrade, Retrofit & Retrofill