Insulated Case Circuit Breakers Insulated Case Circuit Breakers Power Break II800 to 4000A. This breaker provides reliable, flexible and easy-to use circuit protection. Utilizes the EntelliGuard* TU trip unit. 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. Related Industries Industrial Related Products EntelliGuard TU Trip Unit Motor Control Centers (MCCs) Switchboards Spectra Series Power Panelboards - Previous Generation Product Selector Publications Application and TechnicalBrochuresDrawings-Outline and DimensionalInstallation and InstructionService and MaintenanceTime Current Curves Other Circuit Breakers Miniature Circuit Breakers & Supplementary Protectors Remote Racking Devices Low Voltage Power Circuit Breakers Residential Circuit Breakers DC High Speed Circuit Breakers Previous Generation Circuit Breakers Medium Voltage Circuit Breakers Molded Case Circuit Breakers (MCCB) Medium Voltage Outdoor Dead Tank Breakers Insulated Case Circuit Breakers