With the rapid development of China's power industry, preventive testing of electrical equipment is an important part of ensuring the safe operation and maintenance of the power system Insulation diagnosis is an important means of detecting insulation defects or faults in electrical equipment The insulation resistance tester (megohmmeter) is a specialized instrument for measuring insulation resistance. JJG662-89 "Insulation Resistance Meter (Megohmmeter)" approved and implemented in May 1990 has included it as one of the mandatory calibration instruments

At present, electrical equipment (such as transformers, generators, etc.) is developing towards large capacity, high voltage, diversified structure, and sealing This requires the insulation resistance tester to have the characteristics of large capacity, strong anti-interference ability, diverse measurement indicators, accurate measurement results, simple and fast measurement process, and easy portability

The BO25 series insulation resistance tester produced by our company adopts an ultra-thin wire head, multiple voltage level outputs, large capacity, strong anti-interference, simple operation, and time prompt function It is an ideal testing instrument for measuring insulation resistance of transformers, mutual inductors, generators, high-voltage motors, power capacitors, power cables, lightning arresters, and other components

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1. The insulation test of the instrument can measure up to 20G Ω at 500V, 40G Ω at 1000V, and 100G Ω at 2500V for BO2520A; For BO2550A, it can measure up to 100G Ω at 2500V and up to 200G Ω at 5000V; For BO2550B, it can measure up to 200G Ω at 5000V and up to 400G Ω at 10000V

2. The rated output voltage can be kept as low as 4M Ω/8M Ω/20M Ω for BO2520A load resistance; For BO2550A, it is 20M Ω/40M Ω; For BO2550B, it is 40M Ω/80M Ω, which enables the instrument to accurately measure lower insulation impedance

3. Automatic conversion of high and low range dual scale indication, color scale easy to read, and LED display corresponding colors

4. The whole machine adopts a portable design with ABS plastic casing, which has strong anti-interference ability, compact structure, and exquisite appearance

5. The instrument adopts an ultra-thin wire head with strong seismic resistance