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. Related Industries Manufacturing Related Products EntelliGuard TU Trip Unit Motor Control Centers (MCCs) Switchboards Spectra Series Power Panelboards - Previous Generation Product Selector Publications Application and TechnicalBrochuresCatalogs and Buyers GuidesDrawings-Outline and DimensionalInstallation and InstructionTime Current Curves Other Circuit Breakers Remote Racking Devices Residential Circuit Breakers Previous Generation Circuit Breakers Molded Case Circuit Breakers (MCCB) Miniature Circuit Breakers & Supplementary Protectors Low Voltage Power Circuit Breakers DC High Speed Circuit Breakers Medium Voltage Circuit Breakers Medium Voltage Outdoor Dead Tank Breakers Enclosed Circuit Breakers