The Megger BM21 is a high-voltage insulation resistance tester capable of producing test voltages of 500V, 1000V, 2500V, and 5000V DC. It is widely used for testing the insulation integrity of cables, motors, generators, transformers, and switchgear installations.
The BM21 provides insulation resistance measurements and supports the calculation of Polarisation Index (PI) and Dielectric Absorption Ratio (DAR), which are critical for assessing the condition of insulation over time. Its rugged, portable design makes it suitable for both workshop and on-site field testing.
Test Voltage Range: 500V, 1000V, 2500V, 5000V DC
Insulation Resistance Range: Up to 5 TΩ (model dependent)
Display: Analogue and digital display
Power Source: Internal batteries
Measurements: Insulation resistance, continuity, PI, DAR
Applications: Cables, motors, generators, transformers, switchgear
Standards Compliance: Meets IEC 61557 requirements
Form Factor: Portable, hand-held
Please refer to the Megger website for full specifications and documentation.
