ION7650 & PM8240 Voltage Harmonic question

gibson_huang_ep · ‎2018-09-07

Under what conditions, the voltage 5th harmonic will increase to 300%

Ken_Hsu · ‎2018-09-09

Hi Gibson,

For the first 3 screenshots, the y-axis is in magnitude Volts, not % of nominal. The H5 is shown around 250~300V. If the fundamental frequency voltage is 22.8kV, then a THDv of 1~2% makes sense.

As for the 4th screenshot, I suspect it is the same issue. Is it a custom screen in PSO? We would need to verify the measurement sources.

See Answer In Context

Ken_Hsu · ‎2018-09-09

Hi Gibson,

For the first 3 screenshots, the y-axis is in magnitude Volts, not % of nominal. The H5 is shown around 250~300V. If the fundamental frequency voltage is 22.8kV, then a THDv of 1~2% makes sense.

As for the 4th screenshot, I suspect it is the same issue. Is it a custom screen in PSO? We would need to verify the measurement sources.