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21, Rue Cyprian
Villeurbanne, 69100

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Key Contact Personnel:
Georges GAUDART, Head of CERDA       Telephone: +(33) 4 72 68 35 41
Year Founded: HV Lab: 1937 HP Lab: 1929
Total Number of Employees: 50


All tests are performed according to IEC, IEEE, EN, VDE, GOST, FURNAS, GB, DL and other standards or customer specifications.

High Voltage Laboratory

Testing room: D x W x H = 36 x 21 x 25 m
Testing area: D x W x H = 20 x 12 x 18 m
Testing portfolio:
A.C. power frequency tests
Switching impulse tests
Lightning impulse tests
D.C. dielectric tests
Combined voltage tests (BiAS)
Chopped wave tests
All tests can be performed also under rainy conditions
Technical capabilities:

A.C. Power frequency: Up to 1 MV 50 Hz
Lightning impulse: Up to 2,5 MV (1,2 μs / 50 μs)
Switching impulse: Up to 1,6 MV (250 μs / 2,500 μs)
D.C. Direct voltage: Up to 1 MV D.C.
Partial discharge: Up to 750 kV
RIV testing: Up to 550 kV

High Power Laboratory

Testing portfolio:

Basic short circuit test duties: Full pole 420 kV / 63 kA / 50 Hz
Half pole 550 kV / 63 kA / 50 Hz
Short line fault tests duties: Artificial line simulation up to 63 kA
Capacitive current switching tests : 420 kV / 63 kA / 50 Hz full pole
Out of phase making & breaking tests 300 kV full pole
420 kV and higher in half pole
Internal arc tests up to 63 kA

Commutation switching tests in D.C.
Power supply di/dt measurement using Rogowski coils
Arc voltage measurement tests

Technical capabilities:

Maximum generator output : 2 x 2,500 MVA
Maximum short-circuit current (single) : 100 kA
Maximum voltage for synthetic tests: 1,000 kV
Frequency: 50/60 Hz
Testing Halls : 3

Medium Power Laboratory

Testing portfolio:

Short time current withstand up to 80 kA rms for 3s and 160 kAp
Disconnector busbar transfer current up to 4,000 A

Earthing switch breaking and making of inductive current
Technical capabilities :

Transformers 2 x 23 MVA – 2,000 V
Regulator transformer 10 V to 850 V and up 4,000 A – Power factor < 0,15

Climatic & Mechanical Tests Laboratory

Testing room: D x W x H = 11 x 6 x 6.8 m
Testing portfolio:
Icing tests
Mechanical tests
Leakage measurements: SF6, CF4, N2
Technical capabilities:
Temperature range: from -60 °C to +60° C

Temperature Rise Tests Laboratory

Testing room: 2 parallel & independent
Testing portfolio:
Short term temperature rise tests
Long term temperature rise tests
Calculation of temperature rise values based on the resistance measurement of the current transformers
Technical capabilities:

Tests in A.C. Single-Phase (50/60 Hz) – up to 50 kA
Tests in A.C. Three -Phase (50/60 Hz) – up to 10 kA
Tests in D.C. up to 4 kA
Number of temperature sensors Up to 200 x PT1000
Ambient temperature Controlled up to 40 °C.

Value Added Services

Consulting & technical advisory
Logistics, assembly, gas handling and operational assistance
Gas mixture management including SF6, CF4, N2 and g3
Gas analysis with material lab
Mechanical endurance assets
Destruction after tests
Internationally recognized type tests reports covered by accreditation of COFRAC for the tested equipment according to ISO/ IEC 17025. (Accreditation N°1-0260)
ASEFA certification with inspector.