The power path is the entire roadmap of how electricity flows through your facility, from the utility pole on the street to the final piece of equipment. Unfortunately, in some installations, source voltage for a UPS may unknowingly be shared or interrupted by other applications. Understanding how your system is connected is essential to preventing failures.
In this Nationwide Power™ (NP™) case study, an industrial manufacturing facility experiences a UPS power module failure following routine electrical work. A sudden alarm on their Eaton 9PXM unit signals a potential issue for overall operations. We highlight the importance of understanding your power path and relying on rapid, expert-driven solutions in high-stakes scenarios.
| Product | Eaton 9PXM UPS |
| Application | Industrial Manufacturing |
| Synopsis | A customer placed an emergency service call after their Eaton 9PXM UPS triggered an “input fuse open” alarm. The alarm occurred after the customer had placed the UPS in maintenance bypass to perform unrelated electrical work on nearby receptacles. |
| Preliminary Actions | After the initial phone contact, we confirmed the alarm and dispatched a Nationwide Power Critical Power Professional™ (CPP™) for on-site service to troubleshoot the equipment. |
| Resolution | Upon arrival, our CPP™ found the Eaton BPM Maintenance Bypass module. The troubleshooting process quickly identified a faulty power module that had shorted out. The CPP removed the damaged module, safely restarted the UPS, and confirmed the unit was back online and supporting the critical load. The customer was shown the faulty fuse and informed that a full UPS power module replacement (P/N: 9PXM-PXMSPPM 730-06188) was needed. The repair would take approximately one hour. |
| Root Cause | The UPS power module failure was a direct result of a short circuit created by the customer while working on a receptacle near the unit. This incident highlights the importance of understanding the complete electrical infrastructure around your critical power equipment before beginning any work. Performing this minor action correctly can prevent significant and costly consequences. |
| Additional Reading | Case Study #140 refers to the value of expert service for Eaton 9PX . Case Study #155 covers the importance of knowing your electrical infrastructure. |
At Nationwide Power, our team provides around-the-clock technical support, 365 days a year. Our experts ensure a successful transition and reliable operation throughout and after any critical power equipment failure. We have the logistical capability to source and replace parts quickly. Protect your operations with an expert partner. Request a quote for comprehensive UPS maintenance and repair services.
