Description
GE TKM3F1200 Technical Specifications:
- Rated Current: 1200 Amperes continuous
- Frame Type: TKM Series (Heavy-duty industrial frame)
- Poles: 3-Pole
- Interrupting Rating: High short-circuit interrupting capacity (kAIC) suitable for main distribution boards.
- Mounting: Bolt-on or plug-in mounting (depending on specific enclosure)
Functional Features:
- Overcurrent Protection: Provides reliable thermal-magnetic or electronic tripping to protect downstream cables and equipment.
- Manual Disconnect: Serves as a visible, lockable means of isolation for maintenance safety.
- High Breaking Capacity: Capable of safely clearing severe short-circuit faults without catastrophic failure.
- Adjustable Trip Settings: Allows field-adjustable trip thresholds to match specific load requirements.
Application Scenarios:
- Main incoming power feeders in industrial manufacturing plants.
- Power distribution for heavy machinery, large motors, and data centers.
- Commercial high-rise buildings and utility substations.
Performance Parameters:
- Trip Curve: Precision-engineered thermal and magnetic trip elements for accurate coordination.
- Mechanical Life: Rated for thousands of open/close operations.
- Contact Resistance: Ultra-low resistance contacts to minimize heat generation at 1200A loads.
Material Composition & Structural Characteristics:
- Housing: High-strength, arc-resistant thermoset plastic enclosure.
- Contacts: Silver-alloy contacts designed to withstand extreme arc temperatures during fault interruption.
- Mechanism: Robust toggle mechanism with quick-make, quick-break action.
- Terminals: Heavy-duty copper or aluminum line and load lugs.
Working Principle: Under normal conditions, the breaker’s contacts remain closed, allowing current to flow. If an overload occurs, a bimetallic strip heats and bends to trip the mechanism. In the event of a short circuit, a magnetic solenoid generates a strong magnetic field that instantly pulls the trip latch, forcefully separating the contacts. An internal arc chute extinguishes the resulting electrical arc safely.
Installation Requirements:
- Torque Specifications: Line and load connections MUST be torqued to the exact manufacturer specifications using a calibrated torque wrench. Loose connections at 1200A will cause catastrophic overheating.
- Clearance: Maintain strict phase-to-phase and phase-to-ground clearance distances.
- Arc Flash Safety: Installation and maintenance must be performed with appropriate Arc Flash Personal Protective Equipment (PPE).
- Testing: Perform primary injection testing after installation to verify trip settings.
Usage Precautions:
- Never Exceed Ratings: Do not use this breaker on a system with a fault current exceeding its interrupting rating.
- Lockout/Tagout: Always follow strict LOTO procedures before working on or downstream of this breaker.
- Maintenance: Periodically exercise the breaker (open and close manually) to prevent mechanism binding.
- Replacement: If the breaker trips on a severe fault, it should be inspected or tested by a qualified technician before being put back into service.
