How to select the water-shaking meter (insulation resistance
2020-07-23 21:01source：guoyi.sgvisit：次
There are two main points to note when purchasing a water-cooling meter (water-cooled generator insulation resistance tester): First, the generator cooling method must be water-cooled rather than air-cooled. This instrument is only for water-cooled generators; second , Select the voltage level and range. There are three main types of water shake meters (insulation resistance testers for internal water cooling generators) on the market according to voltage levels: (1) 2500V/10G (2) 5000V/20G (3) 2500V/5000V/20G, according to power generation The voltage level and capacity of the machine are different to choose. Third: Secondly, choose those instruments that can automatically compensate and eliminate the influence of the polarization potential of the water on the measurement results. We take the "GY388 water shaker (water internal cooling generator insulation resistance tester)" as an example to illustrate: 1. Automatic measurement of R15, R60, R600, automatic calculation of absorption ratio and polarization index. 2. The test voltage is negative high voltage 2500V, 5000V has strong load capacity. When the resistance (water resistance) between the winding and the water collection pipe is as low as 70kΩ, the test voltage drops <10%. 3. The measurement range is 0 ~ 20GΩ, and the range is automatically switched. 4. It can automatically compensate and eliminate the influence of water polarization potential on the test results. When the resistance between the water collection pipe and the base is as low as 3kΩ, the measurement accuracy can still be guaranteed. 5. The combination of analog bar pointer and digital display vividly shows the trend of data changes and accurate measurement results.
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