Cepel – Electrical Power Research Center (Electrobras System)

Avenida Horácio Macedo, 354 - Cidade Universitária, Rio de Janeiro, RJ, 21941-911 BRAZIL

Website

+55 21 2666 6273

Address: Av Olinda 5.800 – Adrianópolis, Nova Iguaçu, RJ, ZIP CODE: 26053-121 BRAZIL
Mailing Address: Caixa Postal 68007, Cidade Universitáxria, Rio de Janeiro, RJ, ZIP CODE: 21944-970 BRAZIL
Telefax: +55 21 2667 3079
Key Contact Personnel:
Alceo Mendes de Souza Junior,
Laboratories & Experimental Research Director alceo@cepel.br
Alexandre Neves, HV & HP Lab. Coordinator neves@cepel.br
Mauricio Lisboa, Support Lab. Coordinator mbl@cepel.br
Year Founded: HV Lab: 1979, HP Lab: 1981
Total Number of Employees: 55
Major Export Markets Served (2015): Electric Utility and Manufacturers in South America


 

High Voltage Laboratory

Number of Employees in High Voltage Laboratory: 12
Dimension of Main Test Hall: 44 m length x 30 m width x 27 m height
Dimension of Secondary Test Hall: 10 m length x 10 m width x 8 m height
Dielectric Testing Facilities:  

  Max. Volt./Current Standard/Remarks
Impulse Testing:    
Lightning Impulse 3200 kV IEC, ANSI, ABNT
Switching Impulse (Dry) 2800 kV IEC, ANSI, ABNT
Switching Impulse (Wet) 2400 kV IEC, ANSI, ABNT
Current Impulse 100 kA IEC, ANSI, ABNT
A.C. Testing: (Dry/Wet) 1100 kV / 2A IEC, ANSI, ABNT
D.C. Testing: (Dry/Wet) ±1000 kV / 2A IEC, ANSI, ABNT
Partial Discharge& RIV Testing: 1100 kV IEC, ANSI, ABNT
Tan ∂ Testing: 1100 kV / 2A IEC, ANSI, ABNT
Pollution Testing:    
Dimensions of Main Test Chamber: 18 m length x 16 m width x 20 m height

 

  Standard Max.A.C. Volt Max.D.C. Volt
Salt Fog IEC/ANSI/ABNT 600 kV / 2A ±600 kV
Clean Fog IEC/ANSI/ABNT 600 kV / 2A ±600 kV

Other Tests Performed on Insulators, Arresters:
Puncture test (steep-front wave); voltage distribution on insulator strings; visual and UV corona; bias test on HV disconnectors and circuit breakers; all standard tests on arresters; thermal stability on capacitors; chopped impulse testing on SF6, paper/oil and RIP bushings, chopping gap in SF6; ferro-ressonance transient response and short-circuit on instrument transformers (up to 500 kV); lightning damage susceptibility testing for optic cables; lightning impacts on aeronautical structural materials


High Power Laboratory

Total Number of Employees in High Power Laboratory: 10
Kind of Power Source for the HP Laboratory: Three single-phase power transformers 138 kV ±4 x (8370-4122) V in 26 steps, rated 11 MVA continuously and 350 MVA during 1 second
Specifications of Main Test Bay:
Possible Power Frequency: 60 Hz Max. MVA: 750 Max. kV: 100 kV (1-phase) or 60 kV (3-phase) Max. kA & Duration: 100 kA, 0.2 sec.
Electrical Tests:
Medium Voltage Tests: (i) Making and breaking of short-circuit current on circuit breakers, expulsion and current limiting fuses, automatic circuit reclosers, earthing switches, high voltage contactors and other equipment, in the range of 4.5 kV to 100 kV (1-phase) or 4.5 kV to 60 kV (3-phase) with power up to 750 MVA; (ii) Power arc tests on insulator strings for transmission lines; internal arc tests on metal enclosed switchgear and controlgear; pressure relief tests on surge arresters (iii) Short circuit tests on distribution and power transformers and potential transformers; (iv) Short time withstand current tests on reactors, current transformers, metal enclosed switchgear and controlgear, ducts, cables, transmission line space-dumpers and other equipment.
Heat Run Tests: Temperature rise tests on switchgear and controlgear assemblies, ducts, disconnectors or any other low and high voltage equipment, test current up to 50 kA continuously.
Other Types of High Power Tests Offered:
Making and breaking of short circuit current on breakers, fuses, switches, contactors and other equipment, in the range of 110 V to 3500 V (3-phase) or 110 V to 6000 V (1-phase) with power up to 120 MVA; short-time withstand current on current transformers, reactors, switchgear and controlgear assemblies, disconnectors and earthing switches, cables and other equipment; maximum current depends on the impedance of the equipment to be tested and can attain up to 230 kA; Lightning DC current effects on optical ground wires (OPGW).
High Current Test Facilities & Capabilities:
Three single-phase power transformer 138 kV / 4.16 kV ±20% followed by another bank with three single-phase power transformer 4.16 kV / 4 x 275 + 4 x 137.5 V; all transformers have a power of 8 MVA continuously and 40 MVA during 5 seconds.


Other Test Capabilities

Mechanical Tests: Cable tensile rupture test (tensile and compression tests up to 500 kN). Cable efficiency test with Stockbridge Damper.
Environmental Tests: Chamber tests: Salt spray, wet and SO2, UV Fluorescent Test.
Measurement Capabilities: Contact Laboratory
Acoustic Measurement: OLTC acoustic emission monitoring and testing system, Ultrasonic crack detection and thickness test.
Calibration: Instruments Calibration (Laboratory Accredited by National Institute of Metrology, Standardization and Industrial Quality – INMETRO). AC Voltage Source; AC Voltage Meter; DC Voltage Source; DC Voltage Meter; AC Current Source; AC Current Meter; DC Current Source; DC Current Meter; Resistor and Decade Resistor; Capacitor and Decade Capacitor; Capacitance Meter; Signal Generator; Digital Counter and Frequency Meter; Oscilloscope; Temperature. High Voltage Calibration: calibration on-site of measuring systems up to 2.5 MV available for AC, DC, SI, LI, LIC and current impulse. Measurements are traceable to national and international measurement standards and ensured by international comparisons. Calibration is performed according to IEC 60060-2 and IEC 61083. Accreditation for AC voltage from 10 kV up to 180 kV, lightning & chopped impulse from 100 kV up to 500 kV
Electrical Apparatus for Hazardous Locations: Facilities for testing and certifying electrical apparatus for hazardous locations in accordance with the requirements of IEC 60079 standard series).
Motors and drivers testing: dynamometer up 500 kW.
Diagnostic Laboratory for Electrical Equipment: Measurements, monitoring and diagnostics of substation and transmission line equipment with the following capabilities: Partial discharges measurement (phase resolution), Partial discharges measurement with acoustic methodology (up to 20 sensors), Frequency Response Analysis and Transfer functions, Return Voltage and Dielectrometry measurement (Polarization spectrum), Dissolved gas analysis (on site), Thermography, Night vision corona camera and Fast transient measurement in GIS and AIS.
Metalography: STEM/EDX for electrical equipment materials analysis.
Chemistry: TGA/DSC, FTIR, UV Spectra, Hardness Shore A and density tests for materials analysis.
Additional Special Facilities for Testing Electrical Insulators, Arresters, Bushings & Cable Terminations: (i) Faraday cage for corona measurements on conductor bundles (up to 600 kV AC) or 800 kV DC (ii) Impulse generator area of 150 kJ, 360 kV, maximum current of 200 kA.

Posted in AC Testing, Acoustic Measurements, Ageing Testing, Capacitance & Tan ∂ Testing, DC Testing, Electrical Tests, Heat Run Tests, High Power Laboratory, High Voltage Laboratory, Impulse Testing, Mechanical Tests, Other Test Laboratories, Other Types of HP Tests, Other Types of HV Tests, Partial Discharge, Pollution Testing and Seismic Tests

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