Specifications General Product Family: MasterPact (large-frame breakers) Device Type: Low-voltage air circuit breaker (ACB) Model: MT32 H1 / M32H1 Poles: 3‑pole Application: Industrial power distribution protection and isolation Standards Compliance: IEC 60947‑2 Selectivity Category: Category B Control Type: Manual push‑button or handle operation Mounting Mode: Draw‑out or fixed installation Suitability for Isolation: Yes Electrical Ratings Rated Current (In): 3200 A @ 40 °C 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: H1 Rated Ultimate Short‑Circuit Breaking Capacity (Icu): ~66 kA at 220–690 V AC Rated Service Short‑Circuit Breaking Capacity (Ics): ~66 kA Rated Short-Circuit Making Capacity (Icm): ~145 kA peak Trip Unit Trip Unit Compatibility: MicroLogic series electronic trip units Trip Unit Technology: Electronic protection with overload and short-circuit functions (LI / LSI options) Mechanical & Installation Operating Mechanism: Manual push-button or handle operation Mechanical Durability: Designed for frequent operational cycles Connection Orientation: Standard 3‑pole panel connections Environmental Network Frequency: 50/60 Hz Installation Environment: Indoor switchboards and distribution panels Pollution Degree: According to IEC requirements