Product Description
The Allen-Bradley/Rockwell Automation 140U-H6C3-D12-D circuit breaker, part of the 140U series Frame H motor protection line, safeguards equipment, particularly motors, from overcurrent and short circuits. Effective protection requires proper installation, considering motor location, equipment compatibility, and the breaker's rating. Factors like voltage, ambient temperature, and altitude also impact performance. This breaker operates at 220-620 VAC (60 Hz) with a 60-69 kA interrupting capacity. It uses a fixed thermal-magnetic mechanism with bimetal bars and a magnet for rapid current detection, triggering a three-pole trip to halt current flow upon detecting abnormal current. Optimal performance is achieved at or below 40C, with derating required for operation up to 75C.
Is Your Device Showing These Signs?
The Allen Bradley 140U-H6C3-D12-D molded case circuit breaker commonly experiences issues such as nuisance tripping due to incorrect overload settings or thermal magnetic calibration drift. Contact wear and degradation on the breaker's internal contacts leads to increased resistance and potential failure to interrupt fault current. The operating mechanism becomes stiff or inoperable due to environmental contamination or lack of lubrication, preventing proper breaker actuation. Field replacements are necessary when the breaker fails to provide adequate short-circuit protection or exhibits irreversible damage.
Technical specifications
The Allen-Bradley 140U-H6C3-D12-D circuit breaker protects motors from overcurrent and short circuits. Proper installation, considering factors like motor location and environmental conditions (voltage, temperature, altitude), is crucial for effective protection. This breaker, operating at 220-620 VAC with a 60-69 kA interrupting capacity, uses a thermal-magnetic mechanism to quickly detect and interrupt abnormal currents via a three-pole trip. Performance is optimal at or below 40C, requiring derating at higher temperatures.
Our Repair Process for the
140U-H6C3-D12-D
Our repair process for the Allen Bradley 140U-H6C3-D12-D molded case circuit breaker begins with a thorough inspection to identify the root cause of the malfunction, focusing on common issues such as incorrect overload settings, thermal magnetic calibration drift, contact wear, and operating mechanism stiffness. We meticulously assess the breaker's internal components, including contacts and the operating mechanism, for signs of degradation or contamination. Necessary adjustments are made to the overload settings, and the thermal magnetic calibration is corrected to factory specifications. Worn contacts are reconditioned or replaced to ensure optimal conductivity and fault current interruption capability. The operating mechanism is cleaned, lubricated, and adjusted to guarantee smooth and reliable breaker actuation. Finally, the breaker undergoes rigorous testing to verify its performance and adherence to safety standards before it is returned, ensuring proper short-circuit protection and operational integrity.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.
Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
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Ships from Rochester, NY