About us
STRI is an independent high voltage test laboratory in Ludvika, Sweden, serving manufacturers worldwide with accredited testing and trusted results.
We perform high voltage, environmental and temperature rise testing under controlled indoor and outdoor conditions. With extensive expertise and advanced facilities, our engineers ensure precision, reliability and safety in every test.
High Voltage. Highest Standards.
Who are we?
WE ARE STRI – a leading independent laboratory specializing in high voltage testing.
Who do we help?
Our clients are power grid companies and manufacturers of electrical equipment all over the world.
Where are we?
Our main offices and laboratory facilities are located in Ludvika, in Sweden’s High Voltage Valley.
Why choose STRI?
Established in 1990, STRI has accumulated more than three decades of theoretical knowledge and hands-on experience in high-voltage testing.
Our state-of-the-art laboratories and climate test hall rank among the highest-performing in the world. We offer advanced pollution testing for both HVAC and HVDC equipment — up to 800 kV.
At STRI, we combine deep technical knowledge with cutting-edge technology to deliver reliable results that support the future of power systems.
Make the Right Choice — Choose STRI
Some of our key Milestones
2015
STRI expands again. New test hall. New testing opportunities.
2014
STRI performed a unique full-scale DC voltage test on insulators regarding pollution and ice performance.
2013
Sweden’s largest Smart Grid test lab.
Nordic Smart Grid RD 2 RD&D.
2011
One million volt UHVDC world record!
2010
Powerful expansion.
The ultra HVDC specialist – 800kV HVDC – V-string in porcelain tested for corona and pollution, India.
2009
STRI celebrates 20 years in operation in HVV.
2008
World’s 1st 800 k V UHVDC testing completed at STRI.
2006
Inauguration of unique testing site at STRI for 800 kV.
1990
STRI’s high voltage lab built.
Broschure and Info Sheets