A megohmmeter, also known as a high resistance tester or insulation tester, is an essential tool for measuring the electrical resistance of insulating materials, such as wires, cables, transformers, or other electrical components. For individuals and organizations that need to perform occasional electrical tests or do not have the budget to purchase a megohmmeter, rental provides a cost-effective way to access high-quality insulation testers for a specific period, typically ranging from a few days to several weeks. ATEC's megohmmeter rentals offer a wide range of models and brands, allowing users to choose the best equipment for their specific testing needs.
Megohmmeter Functions
A megohmmeter is a specialized instrument designed to measure the insulation resistance of electrical systems and components by sending a high voltage signal through them. This sort of testing is indispensable to maintaining uptime, verifying an installation site, avoiding deterioration, and preventing corrosion. It also acts as a quality control measure during the development of a piece of electrical equipment, a periodic preventative maintenance task, and a troubleshooting tool. This device is even required during installations to help maintain specifications. Here are some of the key functions of a megohmmeter:
- Measure insulation resistance
- Detect faults in insulation
- Determine the quality of insulation
- Monitor insulation aging
- Test electrical equipment
- Ensure the safety of electrical systems
Insulation Testing Standards
Most insulation resistance test standards related to megohmmeters provide guidelines and best practices for these tests and interpreting the results. Some of the most commonly used standards include:
- IEEE 43-2013: IEEE Recommended Practice for Testing Insulation Resistance of Rotating Machinery
- ASTM D149-09: Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies
- IEC 60270: High-voltage test techniques - Partial discharge measurements
- NETA ATS-2007: Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems
- UL 1004-5: Standard for Rotating Electrical Machines - Part 5: Insulation System