Modern switchgear often includes "maintenance mode" switches that temporarily reduce the instantaneous trip settings. The handbook explains when and how to use these to lower arc flash incident energy (cal/cm²) while a technician works inside the gear.
It is frequently cited alongside the (Power Distribution for Industrial Plants) and the IEEE Orange Book (Emergency and Standby Power Systems). switchgear and control handbook
It is the book you reach for when a 480V motor starter fails, when a medium-voltage breaker trips mysteriously, or when you are designing a substation expansion for a new data center. when a medium-voltage breaker trips mysteriously