Parameters Category Parameter Specification for SK827005 (T5X 550 EH) General Product Series SACE Tmax XT Frame Type T5X Rated Current (In) 550 A (Frame Rating) Number of Poles 3 Poles Tripping Unit Type Fixed Thermal-Magnetic Release (EH Type) Rated Operational Values Rated Insulation Voltage (Ui) 1000 V AC Rated Operational Voltage (Ue) 690 V AC Rated Frequency 50/60 Hz Breaking Capacities Ultimate Breaking Capacity (Icu) at 415V 50 kA (According to IEC 60947-2) Service Breaking Capacity (Ics) at 415V 50 kA (100% of Icu for Tmax XT) Tripping Characteristics (EH Fixed) Overload Protection (Ir) Fixed at 550 A (Non-adjustable). Trip characteristic per IEC 60947-2. Short-Circuit Protection (Im) Fixed Magnetic Trip. Typically set at 10 x In (5500 A) or similar fixed multiple. Mechanical & Electrical Electrical Durability 8,000 operations (at In) Mechanical Durability 20,000 operations Terminals Rated Torque Front/Rear: Typically 25 - 30 Nm for main terminals. Cable/Busbar Connection Accepts busbars or cables with appropriate lugs. Max cable size typically up to 2x 240 mm² per pole. Standards & Approvals Compliance Standards IEC/EN 60947-2, UL 489, CSA C22.2 No. 5 Certifications CE, cULus, CCC, etc. Environmental Operating Temperature -25°C to +70°C (Ambient) Storage Temperature -40°C to +80°C Physical Data Approx. Dimensions (W x H x D) ~155 x 210 x 130 mm (3-pole, T5X) Approx. Weight ~7.5 kg