Megger MOM690 Micro-ohmmeter with on-board test control

Description

Advanced Tool for High Voltage Resistance Testing

The Megger MOM690 Micro-ohmmeter is a specialized instrument engineered for measuring low-resistance values in high-voltage circuit breakers, disconnecting switches, and busbar joints. Its primary function is to evaluate the quality of contact surfaces and conductive elements by providing accurate resistance measurements even under high-current loading. With on-board microprocessor-based test control and measurement capabilities, the MOM690 has elevated the standard for modern resistance testing. The device delivers both AC and DC outputs, ensuring complete flexibility for various field and laboratory applications. The on-board software streamlines testing, storage, and reporting by allowing single or series-based test execution, with results that can be instantly stored and later exported for analysis. This ensures quality, efficiency, and compliance with advanced electrical maintenance requirements for high-voltage substations and industrial networks.

Simplified Operation with Automatic Range Setting

Ease of use is a hallmark of the MOM690, distinguished by its automatic range settings and continual resistance measurement. The instrument’s interface is intuitive, guiding the user through test setup and execution without unnecessary complexity. Ranges are selected automatically, ensuring accurate results without manual adjustment, while resistances are constantly monitored and recorded throughout the test period. The built-in software allows users to capture pre-set test currents automatically. Operators can choose to run individual tests or sequence multiple tests for comprehensive reporting. Test data is easily exported via optional MOMWin software, streamlining analysis and documentation. Such streamlined operation makes the MOM690 ideal for field engineers and maintenance professionals seeking to improve workflow efficiency.

Dedicated Applications for Breaker and Busbar Testing

The MOM690 is purpose-built for several essential testing tasks within power transmission and distribution systems. In particular, it is outstanding for measuring contact resistance in high-voltage circuit breakers—including dead tank and GIS types—and disconnecting switches to ensure low-resistance connections. This is critical for identifying potential failure points and verifying the integrity of high-current paths. The MOM690 also excels at measuring resistance in busbar joints—an operation vital for maintaining the performance and safety of substation buswork. Additionally, after testing circuit breakers with current transformers (CTs) mounted, some standards require CT demagnetization, a task efficiently handled by the MOM690’s robust AC output. This versatile AC output also serves as a flexible current source suitable for a range of general applications in electrical testing environments.

Robust Field Design and User Safety Features

Designed for use in demanding environments, the MOM690 is housed in a rugged enclosure and includes enhanced safety protections for the user. The instrument complies with major international standards, featuring certifications such as LVD 2014/35/EU, EMC 2014/30/EU, and RoHS 2011/65/EU. It can operate in temperatures ranging from 0°C to +50°C (32°F to +122°F) and withstand storage or transport conditions as extreme as -40°C to +70°C (-40°F to +158°F). Humidity tolerance up to 95% RH non-condensing ensures reliable performance worldwide. Built-in protection—a miniature circuit breaker, thermal fuse, and software safeguards—prevents overcurrent and thermal faults. The unit’s robust transporter case and ergonomic design ensure it remains transported safely amid rigorous field operations.

Flexible Power, Output, and Measurement Capability

Power versatility is central to the MOM690’s operating range. The instrument supports both 115 V and 230 V AC mains voltage operation, with automatic output range settings to simplify field deployment. High output currents—up to 800 A—allow contact resistance measurements under true operational conditions. DC and AC output modes (not simultaneously) diversify its testing portfolio. The ammeter and resistance measurement sections are highly accurate, with up to ±1% precision from 100 to 800 A, ensuring precise diagnostic capability. The instrument provides real-time readings and toggling options between resistance and voltage values. Ample accessory options, such as cable extension sets and a calibration shunt, further expand the device’s testing reach and adaptability.

Comprehensive Panel Design and Intuitive Controls

The front panel of the MOM690 is ingeniously laid out for quick and safe operation. Key elements include dedicated outputs for DC and AC current, a clear display, USB service port (for updates and diagnostics), grounding terminal, and voltage measurement inputs. Functional switches and rotary selectors give the user total control over current output, funtion selection, and variable test parameters. Safety is prioritized by an ON/OFF switch, miniature circuit breaker, and grounding posts. The instrument’s display toggles easily between measured and selected parameters, and seamless navigation is enabled by dedicated function and selector buttons. These features help users minimize errors and increase test productivity in time-sensitive environments.

Global Delivery with TPT24’s Authenticity Guarantee

For customers seeking genuine Megger MOM690 Micro-ohmmeters delivered to any location worldwide, tpt24 stands at the forefront as the premier online distributor. tpt24 not only guarantees authenticity and quality with every purchase, but also provides delivery to any country, ensuring peace of mind for customers everywhere. Their reputation for reliability and global reach makes them the preferred supplier for electrical maintenance professionals and engineers working across continents. Comprehensive aftersales support, prompt shipping, and transparent order tracking empower buyers to focus on their critical tasks while trusting their investment is protected and genuine. For those in need of the MOM690’s advanced capabilities, tpt24 is your trusted partner.

Summary of Technical Key Features and Accessories

The MOM690 delivers technical excellence with comprehensive measurement, power, and connectivity options. It includes standard and optional accessory kits—such as current cables, sensing cables, and calibration shunt—suitable for various testing scenarios. The device offers real-time data capture with or without PC connectivity, operable in numerous languages (English, French, German, Spanish, Swedish) to accommodate diverse user bases. Optional transport cases and cable extension sets add to its convenience and adaptability. The instrument is ISO-certified for manufacturing quality and environmental management, and the Megger brand itself is a global benchmark for reliability in electrical test instrumentation.