Infrared Inspections of UPS Systems
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Infrared Inspections of UPS Systems
Tip written by: Infraspection Institute
Uninterruptible Power Supply (UPS) systems are commonly found in facilities where reliable electrical power is critical. Infrared inspections can play a key role in maintaining these crucial systems.
An Uninterruptible Power Supply (UPS) system is an electrical apparatus that provides short-term emergency power to a load when the normal input power source fails. Unlike standby generators, UPS systems provide instantaneous protection from input power interruptions by means of attached batteries.
UPS systems are typically used to protect computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption, or data loss. Due to their critical role, it is imperative that UPS systems be maintained to ensure reliability when needed.
Performed under the correct conditions, thermal imaging can be useful in detecting defects within a UPS system including loose or deteriorated connections, overloads, and faulty components. When combined with regular preventive maintenance, thermal imaging can detect faults that are undetectable by other means.
When performing an infrared inspection of a UPS system, keep the following in mind:
- Panel covers should be opened or removed to afford line-of-sight access
- UPS system must be under load
- Be certain to include all current carrying devices including UPS system controls, switchgear, battery cells, battery bus, and wiring
- Inspect battery casings for discrete hot spots
- Compare batteries to each other noting any with elevated temperatures
Thermal imaging may be applied during normal operation of the UPS system or during a controlled discharge test. If imaging during the latter, a thermographer will have to work quickly to ensure complete coverage of the subject components.
Lastly, be certain to observe all necessary safety practices when working on or near energized electrical equipment.
Infrared inspection of power distribution systems is one of the many topics covered in the Level I Infraspection Institute Certified Infrared Thermographer® training course. For information on thermographer training or to obtain a copy of the Standard for Infrared Inspection of Electrical Systems & Rotating Equipment, visit the Infraspection website or call us at 609-239-4788.
