Product Description
The 140UE-N7H3-E12 is an N-frame IEC molded case circuit breaker from the 140UE product line, which offers current ratings from 70 to 1250 Amps (electronic trip) or 15 to 800 Amps (thermal-magnetic trip). This specific 3-pole breaker is rated for 1250 Amps (though its current rating is 1200 Amps) and features an electronic LSI trip unit. It has a breaking capacity of 70-79 kA at 400VAC, dimensions of 406 x 210 x 140 mm, and weighs 21.3 kg. It complies with KEMA-KEUR, CE, and IEC 60947-2 standards, dissipates 210W under load, and operates optimally between -8.9 and 60C. Its breaking capacity varies with voltage and frequency (e.g., 100kA at 240VAC/50Hz, 70kA at 380-415VAC/50Hz). Insulation voltage is 690V (auxiliary) and 750V (main), while impulse voltage is 4kV (auxiliary) and 8kV (main). Bulletin 140UE breakers also offer factory/field-installable accessories and flexible operating mechanisms.
Is Your Device Showing These Signs?
The Allen Bradley 140UE-N7H3-E12 commonly experiences issues such as nuisance tripping caused by incorrect overload settings or electrical noise, requiring adjustment of the FLA dial or implementation of proper grounding techniques. Failure to reset after a fault condition indicates a potential problem with the trip mechanism or the reset button itself, necessitating inspection and possible replacement. Overheating of the bimetallic thermal overload relay suggests excessive current draw or a loose connection, demanding immediate attention to prevent thermal damage and ensure proper motor protection. Contact wear and corrosion on the auxiliary contacts can impede signal transmission to the PLC, requiring cleaning or replacement of the contact block. Inconsistent performance and premature failure are often traced to improper installation or operation outside of specified environmental conditions, emphasizing adherence to manufacturer guidelines for optimal lifespan.
Technical specifications
The 140UE-N7H3-E12 is a 3-pole, 1250 Amp (rated 1200A) IEC molded case circuit breaker from the 140UE line, featuring an electronic LSI trip unit. It has a breaking capacity of 70-79kA at 400VAC, dimensions of 406 x 210 x 140 mm, weighs 21.3 kg, and complies with KEMA-KEUR, CE, and IEC 60947-2 standards. It dissipates 210W and operates between -8.9 and 60C. Breaking capacity, insulation voltage, and impulse voltage vary based on voltage and frequency. The 140UE line offers accessories and flexible operating mechanisms.
Our Repair Process for the
140UE-N7H3-E12
Our repair process for the Allen Bradley 140UE-N7H3-E12 begins with a thorough inspection to identify the root cause of the malfunction, focusing on common issues such as nuisance tripping, failure to reset, overheating, and contact problems. Adjustment of the FLA dial is performed to correct overload settings, and proper grounding techniques are implemented to mitigate electrical noise. If the unit fails to reset, the trip mechanism and reset button are inspected, and replacement is completed if necessary. Overheating issues are addressed by investigating excessive current draw and loose connections, with immediate action taken to prevent thermal damage. Auxiliary contacts are cleaned or replaced to resolve signal transmission problems to the PLC. Finally, installation and operational parameters are verified to ensure adherence to manufacturer guidelines, correcting any deviations to optimize performance and extend the lifespan of the device.
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.