The Allen-Bradley 140M-D8E-C20 is a motor protection circuit breaker designed to provide manual motor control, disconnecting means, and thermal overload protection for motors in industrial applications. It features adjustable thermal overload settings and high magnetic trip characteristics to safeguard motors against overloads and short circuits.
Technical Specifications
- Model: 140M-D8E-C20
- Frame Size: D
- Number of Poles: 3
- Rated Operational Voltage (Ue): Up to 600V AC
- Rated Operational Current (Ie): 20A
- Adjustable Thermal Overload Setting Range: 14.5 to 20A
- Magnetic Trip Setting: Fixed at 13 times the maximum setting of the thermal overload (approximately 260A)
- Trip Class: 10
- Interrupting Rating: High breaking capacity suitable for industrial applications
- Mounting: DIN rail or screw mounting
- Certifications: UL Listed, CSA Certified, CE Marked
Key Features
- Adjustable thermal overload protection allows fine-tuning to match motor requirements, enhancing protection and operational efficiency.
- High magnetic trip setting provides rapid response to short-circuit conditions, minimizing potential damage to motor circuits.
- Trip Class 10 ensures quick disconnection during overloads, suitable for standard motor applications.
- Compact design facilitates easy integration into control panels, optimizing space utilization.
- Dual mounting options (DIN rail or screw) offer flexibility in installation to accommodate various panel designs.
- Compliance with international standards ensures compatibility and acceptance in global markets.
Compatible Components & Accessories
- Auxiliary Contact Blocks: For additional signaling and control functions.
- Undervoltage and Shunt Trip Releases: For enhanced protection and remote tripping capabilities.
- External Rotary Operating Mechanisms: Allow operation of the breaker from outside the panel.
- Busbar Systems and Feeder Terminals: For streamlined power distribution and reduced wiring complexity.
Industry Applications
- Manufacturing: Motor protection in conveyor systems, machine tools, and processing equipment.
- HVAC: Safeguarding motors in heating, ventilation, and air conditioning systems.
- Water Treatment: Protecting pumps and related equipment in water and wastewater facilities.
- Material Handling: Ensuring reliable operation of motors in cranes, hoists, and automated storage systems.
- Chemical Processing: Providing motor protection in mixers, agitators, and other processing equipment.
Installation & Maintenance Notes
- Ensure that the adjustable thermal overload setting is appropriately calibrated to the motor’s full-load current to provide accurate protection.
- Verify that the system’s voltage and current ratings are within the breaker’s specified limits to maintain operational integrity.
- Regularly inspect the breaker for signs of wear, overheating, or mechanical damage to prevent unexpected failures.
- Test the trip functions periodically to confirm proper operation and compliance with safety standards.
- Follow all applicable local and national electrical codes during installation and maintenance to ensure safety and regulatory compliance.
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TCI Supply is not an authorized Allen Bradley Distributor