Utilities can absorb transformer risk across large fleets with spares and prioritization. Most commercial and industrial operators cannot.
When you run only a handful of critical HV/MV units, there is little to no redundancy. Taking one offline can idle an entire site, halt production, or interrupt essential services. The industries that depend on these assets are not peripheral:
• Mining: A single primary substation transformer failure at a gold mine in Ghana’s Ashanti Region halted production at a site generating 12,000 oz/month, risking $85M in lost revenue with an 8–10 month factory rebuild timeline.
• Air, shipping, and rail: When a new transformer malfunctioned during energization at a Denver International Airport substation in March 2026, the result was a campus-wide outage lasting 2.5 hours with 477 flights delayed, 9 canceled, and passengers trapped in elevators.
• Hospital and healthcare campuses: Helsinki University Hospital performing 87,000 surgical procedures per year with patients on life support previously required a complete transformer shutdown to pull oil samples.
• Heavy manufacturing: Industrial outages cost affected firms an estimated $1,477 per second. At Nucor Steel’s Memphis meltshop, a 155 MVAr Static VAR Compensator supporting an AC Electric Arc Furnace required a full control system overhaul after aging technology created reliability risk.
• Data centers A hyperscale AI data center can exceed 100 MW of continuous load, the equivalent to the electricity needs of tens of thousands of homes, and must maintain 99.999% uptime.
• Oil and gas: Refineries and LNG terminals operate multiple HV/MV transformers in corrosive, high-consequence environments where a failure carries compounded risk. Planned maintenance at Sorgenia’s CCGT plant in Italy using active transformer monitoring reduced maintenance costs for certain components by up to 30%.
• Water treatment and pumping: Water and wastewater facilities rely on dedicated MV transformers to power high-horsepower pump motors continuously. A transformer failure at a primary pumping station can interrupt service to entire municipalities with no backup path and no fast replacement option given current supply chain lead times exceeding two years for many unit classes.
In these environments, every transformer is a single point of failure for revenue, safety, or continuity. That reality changes the risk equation.
Early visibility into developing issues is the difference between planned intervention and an unplanned outage that can cost far more than the asset itself.
Relevant Reading:
PQ TechWatch: Societal Costs of Power Quality Disturbances
Xcel Energy identifies cause of Denver International Airport power outage that trapped passengers, disrupted flights — CBS Colorado
25 MW Mobile Substation Transformer Lease – West Africa Ghana — Megagrid Supply
Ubicquia Opens AI-Driven Power Quality Monitoring — mgrid.org
SVC Control Upgrade Enhances EAF Operations at Nucor Steel Memphis Inc. — AISTech 2025
Grid Modernization in the Age of Artificial Intelligence and Cloud — IEEE Power & Energy Magazine
Transformer Lead Times in 2026: A Buyer’s Guide — Nexus Insights
