Megger MOM690 – Micro-Ohmmeter

• Test currents up to 600 A DC for high-current contact resistance testing
• Measurement range from 0.1 µΩ to 2,000 mΩ for detailed resistance analysis
• High-resolution readings down to 0.1 µΩ for accurate contact assessment
• Designed for circuit breakers, disconnectors, busbars, and high-current joints
• Large digital display and straightforward controls for efficient operation
• Portable, rugged construction suited to substation environments

The Megger MOM690 Micro-Ohmmeter delivers powerful performance for demanding contact resistance testing. It supplies test currents up to 600 A DC, allowing engineers to measure resistance values from 0.1 µΩ to 2,000 mΩ. This range makes it well suited to testing circuit breaker contacts, disconnectors, and heavy current busbar joints. The instrument provides measurement resolution down to 0.1 µΩ, helping technicians detect small resistance changes that may indicate contact wear or poor connections. A stable current source keeps measurements consistent during testing. At the same time, the clear digital display presents results quickly and accurately. The control layout remains simple and practical, which helps speed up routine testing. With its robust construction and portable design, the MOM690 fits comfortably into substation maintenance and commissioning programmes.