Case Study

Case Study # 133 | Overheated UPS Batteries in Eaton 93E 30kVA

Oct 25, 2019 | Case Study

Nationwide Power™ is the leading provider in the critical power supply industry. Our core business is the sales and service of uninterruptible power supplies and UPS batteries, along with supporting other critical power components such as emergency generators, switch gear, and HVAC.  We publish critical power related case studies, highlighting best practices and quality standards.

For our contracted customers, during each and every Preventive Maintenance visit, our Critical Power Professionals™ perform an environmental inspection to check room temperature, heat spots, moisture, and any potential safety hazards that could interact negatively with the UPS system. We make recommendations based on our observations and will follow up periodically.

In this case study, we review the details of a battery replacement job for a contracted customer. Unfortunately, due to the environmental conditions of the critical power room, excessive heat caused UPS battery failure prior to the natural end-of-life of the battery string.

To protect the confidentiality of the customer, the customer will be referred to as Company A.

Product Eaton 93E 30kVA
Application Data Center in Medical Facility

During a routine Preventive Maintenance inspection, the Nationwide Power Field Engineer discovered overheated batteries that required immediate replacement. Upon further inspection and discussion with the site contact, it was reported that the HVAC system had been failing intermittently – in the peak of summer – which caused irreversible damage to the UPS batteries.

The UPS batteries were not due for replacement for another 12 – 18 months. Unfortunately, due to the high ambient room temperatures damaging the UPS batteries, immediate replacement was required, costing the client in excess of $4,000.

Preliminary Actions

The client had been diligent about proper UPS maintenance and regularly scheduled PM inspections. As a result of a timely PM schedule, this issue was identified early on, limiting Company A’s risk and exposure.

If this issue had not been addressed promptly, it could have resulted in any of the following:

  • Full battery replacement required, as opposed to the single string.
  • Other UPS component part failures, including damaged battery trays and cabling.
  • Risk of fire, causing a much larger safety threat to the site.
Resolution Battery string was immediately replaced, and the HVAC system repaired to fully operational condition.
Root Cause

The life expectancy for the UPS batteries in this case study was shortened by 12 – 18 months due to HVAC failure.

Nationwide Power installs strip thermometers on our clients’ UPS units. This helps the customer easily monitor temperature at any time by site personnel. Ambient temperatures in the data center room, or wherever the UPS system is located, generally should not exceed the ideal ambient temperature range of 70-77° Fahrenheit.

Additionally, Nationwide Power recommends room monitoring systems which will alert key team members whenever certain environmental elements vary from acceptable ranges.

Additional Reading Identifying qualified UPS service providers:
Case Study #131 | Emergency UPS Service For A Discontinued Liebert NXb 30kVA UPS
News Article: The Importance of Preventive Maintenance

Nationwide Power provides 24/7/365 technical support to ensure that everything operates and transitions successfully before, during, and after any power outage.

Request a quote Call | 800-868-2780 E-Mail

We are your critical power infrastructure partner!

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February 23, 2021

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