Technical Specifications Frame Current Rating: 1200A Trip Rating: 800A Pole Quantity: 3 Pole Rated Operating Voltage: 600V AC Short‑Circuit Interrupt Rating: 30kA @480V AC Trip Unit Type: Interchangeable thermal‑magnetic trip Mounting Method: Bolt‑on cabinet mounting Terminal Accessory: Pre‑installed line & load Cu/Al universal lugs Operating Temperature: ‑40℃ ~ +70℃ Storage Temperature: ‑50℃ ~ +85℃ Relative Humidity: 5%‑95%, non‑condensing Certifications: UL, CE industrial electrical compliance
Functional Features Interchangeable thermal‑magnetic trip unit supports on‑site protection‑current adjustment. Thermal overload delayed protection and magnetic instantaneous short‑circuit protection function. Pre‑installed line‑side and load‑side copper‑aluminum compatible connection lugs. Front‑panel manual operation handle for local switching‑on and switching‑off control. Mechanical visual trip indicator for fault‑action state quick identification. Handle pad‑lock mechanism for maintenance lock‑out‑tag‑out safety isolation. Heavy‑duty contact assembly adapts to long‑time large‑current working condition.
Application Scenarios Heavy‑industry factory large‑capacity power distribution branch circuit protection. Large‑size low‑voltage motor group power‑supply loop protection. Process plant heavy‑load production equipment power supply protection. Legacy GE TKM series power distribution cabinet spare‑part replacement. Industrial auxiliary power system fault‑isolation application.
Structural Characteristics Reinforced large‑frame molded insulation housing with built‑in large‑capacity arc‑quenching chamber. Front‑side manual operation handle and mechanical trip‑status observation window. Detachable interchangeable trip‑unit installation cavity. Pre‑assembled heavy‑duty Cu/Al universal lugs on line‑side and load‑side terminals. Handle pad‑lock mechanical device for maintenance safety isolation requirement. Internal arc‑shield baffle reduces arc‑flash influence to adjacent cabinet components.
Working Principle Persistent overload current heats internal bimetallic thermal element to produce bending deformation, triggers delayed mechanical tripping. Under short‑circuit fault condition, huge fault‑current excites magnetic trip coil to realize instantaneous trip action.
Installation Requirements Securely fasten breaker inside standard power distribution cabinet by bolt‑on mounting. Implement reliable protective grounding strictly complying with local electrical safety codes. Torque pre‑installed lug terminal bolts to manufacturer‑recommended torque value to avoid loose‑contact overheating.
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