Cepel – Electrical Energy Research Center

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Avenida Olinda, 5800 – Adrianópolis
Nova Iguaçu, RJ, 21053-060

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High Voltage & High Power LAB.
Avenida Olinda, 5800 – Adrianópolis, Nova Iguaçu, RJ, 21053-060

Material & Energy Efficiency Lab.
Avenida Horácio Macedo, 354 – Cidade Universitária, Rio de Janeiro, RJ, 21941-911

Key Contact Personnel:
Orsino Borges de Oliveira Filho,
Laboratories & Technological Services Director orsino@cepel.br
Wagner de Almeida Duboc,
High Voltage & High Power Lab. Coordinatorduboc@cepel.br
Alberto Pires Ordine,
Material & Energy Efficiency Lab. Coordinatorordine@cepel.br
Vitor Martins Barbosa,
Certification Activity vmb@cepel.br

Mailing Address:
Caixa Postal 68007, Cidade Universitária, Rio de Janeiro, RJ,
ZIP CODE: 21944-970

Year Founded 1974
HV Lab: 1979
HP Lab: 1981
Total Number of Employees: 52
Major Export Markets Served: 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

Impulse Testing Max. Volt./Current Standard/Remarks
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
Other Tests
AC Stress: (Dry/Wet) 1100 kV / 2A IEC, ANSI, ABNT
DC Stress: (Dry/Wet) ±1000 kV / 2A IEC, ANSI, ABNT
PD & RIV Testing: 1100 kV IEC, ANSI, ABNT
C & Tan ∂ Measurements: 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 on insulators; voltage distribution on insulator strings; visual and UV corona; bias test on HV disconnectors and circuit breakers; thermal stability on capacitors; fast chopped impulse testing on SF6, OIP and RIP bushings.

High Power Laboratory

Total Number of Employees in High Power Laboratory: 11
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 1 second.
Specifications of Main Test Bay
• Power Frequency: 60 Hz
• Max. MVA: 1050
• Max. kV: 100 kV (1-phase) or 60 kV (3-phase)
• Max. kA & Duration: 100 kA, 0.2 sec.

Power 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 (single-phase) or 4.5 kV to 60 kV (three-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 control gear; 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 control gear, ducts, cables, transmission line space-dumpers and other equipment.

Heat Run Tests:

Temperature rise tests on switchgear and control gear assemblies, ducts, disconnectors, or any other low and high voltage equipment, test current up to 50 kA continuously.

Other High-Power Tests

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 control gear assemblies, disconnectors and earthing switches, cables and other equipment; maximum current of 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 for 5 seconds.

Other Testing Facilities

Ultra High Voltage Laboratory: UHV outdoor laboratory for testing AC and DC transmission lines and electrical equipment and accessories for systems up to 1200kV AC and ±1000 kV DC with the following capabilities: Three single-phase 750 kV 60 Hz Voltage transformers for three-phase tests and 2.25 MV AC 60Hz for single–phase tests. DC sources up to ±1.600 kV, Impulse generator for lightning and switching impulse up to 6.4 MV and combined tests.
Environmental Tests: Chamber tests: Salt spray, wet and SO2, UV Fluorescent Test.
Calibration: Accredited Instruments Calibration Laboratory (ISO/IEC 17025) for AC/ DC voltage and current, Frequency, Time, Resistance and Capacitance.
High Voltage Calibration: Accredited Laboratory for calibrating High Voltage measuring systems up to 2,5 MV for AC, DC and Voltage and Current Impulses. Calibration is performed according to IEC 60060-2 and IEC 61083.
Motors and Drivers Testing: Accredited Laboratory for testing distribution transformers up to 400 kVA and electric induction motors from 0.10kW up to 400 kW.

Smart Grid Lab: Facility for experimental research and testing of quasi-stationary and dynamic characteristics of the interface between DER (Distributed Energy Resources) and the power grid. It comprises photovoltaic (PV) systems, storage systems with batteries, highly dynamic AC and DC programmable power sources, real-time digital simulator, smart power inverters, on-line programmable loads, multi-tap transformers, wind turbine emulators and communication/ measurement/ control systems. It is divided in three applications areas:
• Power hardware-in-the-loop test bench
• Low voltage (LV) microgrid
• Component testing (power devices, communication devices)
Diagnostic Laboratory for Electrical Equipment: Measurements, monitoring and diagnostics of substation and transmission line equipment.

Material and Mechanical Laboratory:

Dedicated to materials research at Cepel since its foundation (1974), the multidisciplinary areas of the Material and Mechanical Laboratory carry out a wide variety of laboratory tests, technological services, and experimental research to meet the needs of important enterprises in the energy sector. With a team of specialists and an infrastructure of modern equipment, the Laboratory researches different types of materials an their performance – polymers, metals and their alloys, ceramics, coatings, among others.

Metallography: Equipped with modern materials characterization apparatus (metallic and non-metallic), and mechanical properties tests, the area develops projects related to structural integrity and improvement of the properties of components used in equipment of the electrical sector, seeking a safer, economical operation associated with greater availability for generation.

Corrosion: The resistance of materials to different weathering agents is evaluated by accelerated and non-accelerated corrosion tests, in laboratory installation as well as in field condition. The area investigates corrosion processes and develops experimental research on anticorrosive methods, coatings technology and optimized solutions regarding cost and anticorrosive performance, in order to improve long-term life of equipment and metallic structures of the energy sector.

Chemical Analysis:  The area develops methodologies and performs chemical analyzes according to national or international standards, covering a wide range of materials for power generation, transmission and distribution. Results of chemical analysis determine materials composition and allow its characterization. They are important tools to the investigation of different kind of materials failures and to monitor and improve equipment’s performance.

Mechanics and Structural Dynamics: Research and testing on mechanical aspects of materials used in generation, transmission and distribution systems. With modern equipment, the area carries out tension, bending, compression, cyclic fatigue and fracture resistance tests in materials. Developments in finite element methods are achieved to analyze mechanical efforts on different components of equipment. The area also investigates deformation and mechanical vibrations in equipment and structures, with the development of intelligent sensors.

Electric Efficiency Laboratory:

The Energy Efficiency Laboratory carries out dozens of laboratory tests, some of them accredited by the National Institute for Metrology, Quality and Technology – Inmetro. Tests are carried out following procedures of national and international standards, and clients technical specifications. The laboratory conducts experimental research and performance testing of different products associated with energy efficiency programs, in the areas of lighting, refrigeration, washing machines, photovoltaic systems, electromagnetic compatibility and electrical safety.

Refrigeration: Performance evaluation of refrigerators, freezers and air conditioners, in compliance with the Brazilian Labeling Program (PBE) and the National Program for the Conservation of Electric Energy (Procel).

Lighting: Supporting government agencies in the effort of energy conservation and energy efficiency in components and systems of public, residential, commercial and industrial lighting.

Photovoltaic Systems: Testing of photovoltaic modules in a modern Solar Energy Simulator, according to Conformity Assessment Regulation (RAC) of Inmetro. It is a reference laboratory for Inmetro and participates in R&D projects in tests on these types of equipment.

Electromagnetic Compatibility and Electrical Safety: Immunity and emission tests, conducted and radiated, are carried out with high precision equipment and the necessary capacity for its operation, supporting the Brazilian Labeling Program (PBE). Electrical safety tests are applicable to a wide range of products and equipment in the electrical sector. The area offers technical support to other Cepel laboratories and to research in the area of ​​the National Policy for the Conservation and Rational Use of Energy.

Notification Body

Accredited by Inmetro (National Institute for Metrology, Quality and Technology).

Scope of activity:

• Mandatory certification in Brazil: Equipment for explosive areas, in accordance of the standard IEC 60079-0 series.
• Non-mandatory certification in Brazil: Certification of repair shop of equipment for explosive atmospheres in accordance with the standard IEC 60079-19.


(Certifications conducted using ABNT (Brazilian standards) in consonance with International IEC normalization. This certification also is valid in Mercosul countries.

Wires and cables
Light switch
Power outlet
Power Distribution Transformers Labeling Program

Conducting Brazilian Program for labeling liquid insulated distribution transformers (PBE-Transformadores). This Program aims at ensuring high level of distribution transformers performance concerning reduction of losses. By means of PBE, manufacturers and overhauling and repair companies are periodically evaluated to verify whether they meet related technical requirements.