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TEST LABS

Laboratory For Routine Tests On Transformers And Motors

The HVEX solution acts as a true portable transformer testing laboratory, enabling automated tests on transformers with high levels of precision and efficiency, directly at the operation site or in the field. Equipped with advanced automation technology, the system performs all tests according to IEC 60076 and tests standardized by NBR 5356, ensuring full compliance with international and national technical requirements. This approach eliminates the need to transport equipment to fixed laboratories, reducing operational costs and providing fast, reliable diagnostics for power and distribution transformers. With advanced automation technology and dedicated software, the system ensures high accuracy, repeatability, and normative compliance in all tests. Designed for flexibility and high productivity, the HVEX laboratory is capable of performing multiple tests automatically, from initial setup to execution and data storage, significantly reducing testing time and eliminating operational errors. Performed Tests: No-load losses and excitation current Load losses and short-circuit impedance Power frequency withstand voltage (AC Hipot) Induced voltage with frequency variation (Induced Test) Winding resistance measurement (Winding Resistance) Turns ratio and polarity (Turns Ratio Test) Magnetizing current measurement Short-circuit voltage measurement Automated tests with digital data recording and customized reports Technical Advantages: Automated operation with complete control via HVEX software Automatic transformer positioning and test lead connection Drastic reduction in test setup and execution time Intuitive graphical interface with model and history database Complete recording and traceability of all results Compliance with national and international standards Applications: Factory Acceptance Tests (FAT) for new transformers On-site maintenance and diagnostic tests Modernization of manufacturer and utility laboratories Reduced logistics and transportation costs for transformers to fixed laboratories Technical Standards Complied With: Brazilian Standards (ABNT): NBR 5356-1 – Routine, type, and special tests on transformers NBR 5356-3 – Electrical tests of liquid-immersed transformers NBR 5440 – Power transformers – Tests and specifications International Standards: IEC 60076-1 – Power Transformers – General IEC 60076-2 – Temperature Rise for Liquid-Immersed Transformers IEC 60076-3 – Insulation Levels, Dielectric Tests and External Clearances IEC 60076-5 – Short-circuit Withstand Capability IEC 60076-7 – Loading Guide for Oil-Immersed Transformers IEEE Std C57.12.00 – General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers IEEE Std C57.12.90 – Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

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Technical Information

Compatible transformers

From 220 V to 440 V at LV and up to 36 kV on HV; from 5 kVA to 300 kVA, 10% of maximum impedance and X/R ratio of 8x

Tests covered

Withstand voltage at industrial frequency, Induced voltage of short duration, No-load losses and excitation current, Short-circuit impedance and load losses

Accuracy Loss test

0.6% for voltage and current, 1.0 °C for temperature

Accuracy Applied/Induced tests

1.0% for voltage

Work frequency

From 50 to 240Hz

Efficiency and precision in routine tests on transformers

The HVEX rapid testing laboratory is a solution for efficiently and safely conducting routine electrical tests on transformers. Developed to automate and optimize the testing process, it caters to transformers with a voltage class of up to 36 kV and power between 5 kVA and 300 kVA. The laboratory automatically switches the transformer connections, ensuring precise and safe execution. Among the tests conducted are verification of withstand voltage at industrial frequency, short-duration induced voltage, no-load losses, excitation current, short-circuit impedance, and load losses. It offers a significant reduction in the time required to complete tests, increasing productivity and operational efficiency. Moreover, the entire process is carried out in a completely safe manner, eliminating the need for direct operator intervention. The HVEX transformer routine testing laboratory is a comprehensive and innovative solution for those looking to optimize their transformer testing processes, ensuring high quality, efficiency and safety

Benefits and Usability

Rapid routine tests
Allows for the rapid execution of routine tests relevant to transformers, significantly reducing the time needed to complete each test and ensuring a swift, efficient, and safe operation
Automated Process
After the positioning and connection of the transformer, the software takes control of the tests, ensuring precise, productive, and safe execution of routine tests
Automatic Reports
At the end of each test, the software can generate fully automated detailed reports on the test results per transformer, facilitating documentation and analysis of the results
Complete Solution
A single solution capable of performing various different tests in a highly automated manner without compromising operator safety