Brazil-based MEGABRAS, which manufactures electrical testing and measurement equipment for power systems, substations and industrial maintenance, is exhibiting at the SAHA 2026 defence and aerospace exhibition, highlighting technologies aimed at improving the safety and reliability of electrical infrastructure.
Its product range includes insulation testers (megohmmeters), micro-ohmmeters, ground resistance testers and high-potential (hipot) systems, as well as digital transformer ratiometers, kilovoltmeters and power quality analyzers.
Widely used by utilities, engineering firms and maintenance teams in power grids, substations and high-voltage laboratories, the company said their products support a range of applications, from testing transformers and cables to monitoring network performance and diagnosing faults in industrial equipment.
Among the products the company sells is the MPK215R high-current micro-ohmmeter, a portable, microprocessor-controlled device designed for use in electrical substations. It measures very low contact resistance in high-voltage circuit breakers, switches and busbars, with test currents ranging from 5 to 200 amps, using a four-terminal method to ensure accuracy.
The unit features a built-in cooling system that allows repeated testing without triggering thermal protection, supporting up to 30 consecutive one-minute tests under standard conditions. It offers high measurement stability and precision, with readings displayed at up to 4½-digit resolution and sensitivity down to 0.1 micro-ohms.
Weighing about 11kg, the device is compact and built with impact-resistant materials, making it suitable for field use. It is also water-resistant and designed to operate in harsh environments, providing reliable performance both in laboratories and on-site.
Also in the company’s portfolio is the EM4058 earth tester, a digital, microprocessor-controlled instrument used to measure earth resistance, ground resistivity and stray voltages, in line with IEC 61557-5.
Designed for substations, industrial sites and distribution networks, it also supports soil resistivity testing using the Wenner method.
The unit operates automatically, checking test conditions before each measurement and alerting users to issues such as high interference or poor connections. It selects the appropriate range and displays results on an alphanumeric screen.
Users can choose test frequencies to simulate different conditions, from industrial fault currents to lightning-related effects. A frequency scan function measures across multiple frequencies and stores results in internal memory.
The device covers a wide measurement range from 0.01 ohms to 20 kilo-ohms, ensuring accuracy across different soil types. It includes built-in memory, a printer and USB connectivity for data transfer, as well as remote control via Android devices.
Portable and rugged, the EM4058 is designed for field use and operates in harsh conditions using a rechargeable battery.
“MEGABRAS instruments are portable, compact, lightweight and easy to use, ideal for use in field, with an accuracy comparable to the best laboratory instruments,” the company said.
“The solid experience, high technical and commercial expertise of our professionals and partners were of paramount importance for the international recognition of our products that are used today in more than 40 countries on 5 continents.”
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