STRI AB

Lyviksv.gen 8, SE - 771 31 Ludvika, SWEDEN

Website

+46 240 795 00

Address: Lyviksvägen 8, SE – 771 31 Ludvika, SWEDEN
Mailing Address: P.O. Box 707, SE – 771 80 Ludvika, SWEDEN
Telephone: (46) 240 795 00    Telefax: (46) 240 150 29
E-Mail: stri@stri.se
Key Contact Personnel:
Dan Wikström, President dan.wikstrom@stri.se
Dan Windmar, Vice President dan.windmar@stri.se
Ronnie Branér, Ass. Marketing Mgr. ronnie.braner@stri.se
Year Founded: HV Lab: 1991
Total Number of Employees: 50
Major Export Markets Served (2016): Europe, India, South Africa, USA


 

High Voltage Laboratory

Number of Employees in High Voltage Laboratory: 22
Dimension of Main Test Hall: 37 m length x 25 m width x 30 m height
Dimension of Second Test Hall: 35 m length x 18 m width x 21 m height
Dimension of Third Test Hall: 19 m length x 18 m width x 21 m height
Dimension of Fourth Test Hall: 13 m length x 10 m width x 12 m height
Dimension of Fifth Test Hall
: 10 m length x 10 m width x 5 m height
Dielectric Testing Facilities:

  Max. Volt./Current Standard/Remarks
Lightning Impulse 2800 kV  
Switching Imp. (Dry) 1850 kV  
Switching Imp. (Wet) 1850 kV  
A.C. Testing:    
Dry 1050 kV/1.5 A 50 Hz single phase
  600 kV/4.0 A 50 Hz single phase
  550 kV/3.0 A 50 Hz single phase
  430 kV/2.0 A 50 Hz 3-phase
 Wet  As dry test except 600 kV/4 A  
D.C. Testing:    
Dry & wet 1250 kV/0.3 A/2 A continuous current/ pulses

Partial Discharge & RIV Testing: Same voltage as for AC-dry test
Capacitance & Tan ∂ Testing: Same voltage as for AC-dry test
Pollution and Environmental Testing:
Dim. of Main Test Chamber (length x width x height):
1. Ø 18 m x 23 m; 2. 3 m x 3 m x 5 m

  Standard Max.A.C. Volt. Max.D.C. Volt. Temp from– to °C
Salt Fog IEC 60507 860 kV ±1200 kV  /
Clean Fog IEC 60507 860 kV ±1200 kV  Max. 55°C
Environmental IEC 60068 180 kV ±260 kV -60°C to +70°C
Icing Tests IEC 62271-102 860 kV ±1200 kV -15°C to 0°C

Ageing Tests:
5000 h test at multiple stresses acc. to IEC TR 62370; 2 chambers each 10 m3; 1000 h salt fog test according to IEC 62217, two with dimensions 2.1 m x 2.1 m x 2.2 m, one 3 m x 3 m x 5 m, and one 2.0 m x 1.2 m x 2.6 m

Other Testing Facilities:
HV Cable Testing

  Max. Volt./Current
Load Cycling DC current 2000 A ±5 V on potential up to 1200 kV
  AC current 3000 A
AC Voltage 1050 kV/2 A, 650 kV/5,5 A
DC Voltage ±1200 kV
Lightning Impulse 2.80 MV
Switching Impulse 1.85 MV

Test Loop Length Limited only by required supply current
PQ testing on cables: DC ±1050 kV, AC 650 kV
Bending test on cables up to 3 m bending radius
UHVDC Test: Outdoor UHVDC test system for long term test of equipment up to 1050 kV.
Temperature Rise Tests: On bushings, instrument transformers, disconnectors, circuit breakers, etc., up to 9000 A AC, 8400 A DC


Other Test Capabilities

High Power Tests: In collaboration with other laboratory partners
Mechanical Tests: Maximum tensile load 420 kN. Higher tensile load, compression tests, torsional tests and thermal-mechanical tests up to 500 kN at 1.8 m length in collaboration with other laboratory partners.
Material Test: Non-electrical tests for cables
Additional Special Facilities:
• Instruments for RIV tests up to 2.7 GHz.
• Probes for AC and DC E-field measurements controlled by an insulated robot.
• Cameras with UV sensitive lenses for detection of corona activities.
• A remote-controlled UV-sensitive video system (Ofil DayCor II) for detection of small partial discharges.
• IR-camera (FLIR SC640) for measurement of temperature profiles and hot spots.
• Power quality equipment for site measurements of harmonics, flicker, dips and transients on 420 kV systems.
• Partial Discharge (PD) measurements and analysis at site for generators, transformers, GIS and cables.
• Interoperability test for IEC 61850 devices.
• Insulator Selection Tool (IST) and Line Performance Estimator (LPE) with insulator database for optimization of insulation.
• Test for switching of bus-charging currents on disconnectors and breakers for gas-insulated metal-enclosed switchgear (TD1, TD2 and TD3) up to 1100 kV.

Posted in AC Testing, Ageing Testing, Cable Testing, Capacitance & Tan ∂ Testing, DC Testing, High Voltage Laboratory, Impulse Testing, Mechanical Tests, Other Test Laboratories, Partial Discharge and Pollution Testing

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