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 Enclosed 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