The value of voltage which, combined with a rated current, determines the application of the circuit breaker. 2. Rated Insulation Voltage ( Uicap U sub i
"This is the big one. Icu is the ultimate breaking capacity. It tells us the maximum short-circuit current the breaker can interrupt without destroying itself. Ics is the service breaking capacity—the level where it can break the circuit and still work afterward." iec 60947-2 pdf
When reviewing an IEC 60947-2 PDF datasheet or compliance certificate, you will encounter several critical technical symbols and metrics. Understanding these terms is essential for proper discrimination and cascading calculations. 1. Rated Operational Voltage ( Uecap U sub e The value of voltage which, combined with a