Electrical Energy Research Center

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

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

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

Key Contact Personnel:
Orsino Borges de Oliveira Filho,
Laboratories & Experimental Research Director orsino@cepel.br
Wagner de Almeida Duboc,
HV & HP Lab. Coordinatorduboc@cepel.br
Alberto José Salomon Junqueira,
Support Lab. Coordinatorajsj@cepel.br
Vitor Martins Barbosa,
Responsible for the Certification Activity vmb@cepel.br

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

Year Founded
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
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; 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; ferro-resonance transient response and short-circuit on instrument transformers; lightning damage susceptibility testing for optic cables.

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 during 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.

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 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 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 control gear 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

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 High Voltage measuring systems up to 2,5 MV for AC, DC and Voltage and Current Impulses. Calibration is performed according IEC 60060-2 and IEC 61083.
Motors and Drivers Testing: Accredited Laboratory for testing on distribution transformers up to 400 kVA and electric induction motors from 0.10kW up to 400kW.

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 programable power sources, real-time digital simulator, smart power inverters, on-line programable 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.
Metallography Laboratory: Equipped with STEM/EDX for electrical equipment materials analysis, this laboratory  is capable of performing a range of material characterization tests (metallic and non-metallic) that are the basis for the development of studies and projects related to structural integrity and improvement of the properties of components used in the most diverse equipment.
Chemical Analysis Laboratory:  This laboratory is able to develop methodologies and implement and perform chemical analyzes, according to national or international standards, covering a wide range of analytical services related to electrical materials for power generation, transmission and distribution.
Mechanics and Structural Dynamics Testing Laboratory: This laboratory supports research on mechanical aspects of generation, transmission and distribution systems
Electrical and Magnetic Properties Laboratory: This laboratory is able to perform various tests for the characterization of electrical, dielectric, magnetic and other materials.
Refrigeration Laboratory:  This laboratory is equipped to evaluate the performance 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 Laboratory: This laboratory supports government agencies in the effort of energy conservation and energy efficiency in components and systems of public, residential, commercial and industrial lighting.
Notification Body
Begin of activity: 1994
Organism Accredited by Inmetro (National Institute for Metrology, Quality and Technology).
Scope of activity for mandatory certification in Brazil.
• Equipment for explosive areas, in accordance of the standard IEC 60079-0 series
Certification low voltage devices installation
(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
• Plugs
• Adaptors
– Scope of activity for non-mandatory certification in Brazil
• Certification of repair shop of equipment for explosive atmospheres in accordance with the standard IEC 60079-19
– Power Distribution Transformers Labeling Program
The Cepel certification team with Inmetro’s partnership, also is responsible for conducting PBE-Transformadores (Brazilian Program for transformers labeling) for power electric distribution transformers filled with insulating liquid. This program is the responsible in Brazil for ensure the performance of the power distribution transformers in terms of reducing of losses. The program has the responsibility to periodically to evaluate the manufacturer and the overhauling and repair companies