Specifications General Product Family: PR series Device Type: Molded case circuit breaker (MCCB) Model: PR122/P-LSI Poles: 3‑pole Application: Industrial power distribution protection and isolation Standards Compliance: IEC 60947‑2 Control Type: Manual or handle-operated Mounting Mode: Fixed or draw‑out Suitability for Isolation: Yes Electrical Ratings Rated Current (In): 1600 A Rated Operational Voltage (Ue): Up to 690 V AC, 50/60 Hz Rated Insulation Voltage (Ui): 1000 V AC Rated Impulse Withstand Voltage (Uimp): 12 kV Breaking Capacity Class: LSI (adjustable for long-time, short-time, and instantaneous protection) Rated Ultimate Short-Circuit Breaking Capacity (Icu): 50–100 kA (depending on variant) Rated Service Short-Circuit Breaking Capacity (Ics): 100% of Icu Rated Short-Circuit Making Capacity (Icm): High peak short-circuit current capability Trip Unit Trip Unit Type: LSI (Long‑Short‑Instantaneous) electronic protection Protection Functions: Adjustable long-time, short-time, and instantaneous trip Adjustable Range: Settings configurable to match downstream equipment and coordination requirements Mechanical & Installation Operating Mechanism: Manual ON/OFF Mounting Mode: Fixed or draw‑out Connection Orientation: Standard panel connections Mechanical Durability: High cycle life suitable for frequent operations Environmental Network Frequency: 50/60 Hz Installation Environment: Indoor switchboards and distribution panels Pollution Degree: Suitable for industrial environments