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