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HSE Safety Notice: maintenance of industrial UPS systems

The HSE issued a safety notice relating to dangerous occurrences that resulted from a failure of industrial UPS systems.

The HSE recently carried out several investigations into dangerous occurrences, such as localised fires or unplanned release of toxic substances, which resulted from a failure of industrial UPS systems at onshore major hazard establishments. Failure of these industrial UPS systems typically resulted in a loss of power to industrial control systems, emergency shutdown systems and emergency mitigation systems. From the investigations there are actions required by each of the following groups to ensure that you are meeting your legal requirements:
  • Designers, manufacturers, importers and suppliers
  • End users and maintenance contractors
  • Major hazard establishments
The Safety notice outlining the problem and actions required to prevent similar dangerous occurrences can be read in full here.   Source: Maintenance of industrial uninterruptible power supply (UPS) systems – HSE Safety Notice, published March 2022

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