STRI

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Lyviksvagen 8
Ludvika, SE - 771 31
Sweden

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Overview

Mailing Address:
P.O. Box 707, SE – 771 80 Ludvika, SWEDEN

Key Contact Personnel:
Dan Windmar, Vice President dan.windmar@stri.se
Ronnie Branér, Assistant Marketing Mgr. ronnie.braner@stri.se

Year Founded
HV Lab: 1991

Total Number of Employees:
22

Major Export Markets Served (2018):
Japan, China, India


 

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High Voltage Laboratory

Number of Employees – High Voltage Laboratory:
20
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 1200 kV/1 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):
• Ø 18 m x 23 m
• 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, 61245 860 kV ±1200 kV  /
Clean Fog IEC 60507, 61245 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 62370,2000 h terna cycle
• 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 1200 kV/1 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.
• 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.