Testing Facilities
STRI’s large test hall can be divided into two test bays enabling different tests to take place simultaneously.
The test halls are provided with highly effective electromagnetic shielding, which gives a very low background level during PD and radio interference measurements.
STRI has equipment for handling SF6 gas and transformer oil.
Diagnostic Tools
STRI has sophisticated equipment for the measurement and registration of different parameters during tests such as:
Special photo and video equipment sensitive to UV-light study discharge mechanisms and corona
Power quality can be measured by different instruments to localize harmonics and variety of voltage variations
Electrical field strength can be measured at high potential with field probes developed by STRI.
Outdoor Testing
STRI’s outdoor test area can be used for short and long term testing of, for example pre-qualification tests of cables.
Control Room
The different sets of test equipment are controlled from five special rooms. These receive their power supply via special isolating transformers to protect the measuring equipment and to ensure that accurate test data are obtained.
Test Ratings
Lightning Impulse: 2 800 kV
Switching Impulse: 1 850 kV
AC Testing: 1 200 kV
DC Testing: 1 600 kV
Partial Discharge & RIV: 1 200 kV
Capacitance & Tanδ: 1 000 kV
Temperature Rise Testing: 8 000 A AC / 8 400 A DC
Test Facilities
Width x length x heigth
High voltage test hall, 25 x 37 x 30 m
High voltage test hall, 18 x 36 x 21 m
High voltage test hall, 18 x 18 x 20 m
High voltage test hall, 10 x 13 x 12 m
Pollution test hall, Ø18 x 23 m
Testing
STRI is a leading independent test laboratory based in Ludvika, Sweden. We serve manufacturers of electrical equipment worldwide.