When the variable-frequency pump stops, the frequency is reduced while the speed remains unchanged

2017-07-10 View Original

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I have a question: with a variable-frequency pump, when the pump is stopped and the frequency is reduced from 90% to 30%, then further decreased, the pump’s speed doesn’t change – it continues to run at a high speed until the frequency reaches 0%, at which point the speed is the same as it was at 30%. What is the reason for this?

Reply #2 2017-07-11

Is something set on the inverter? You can take a look here

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When the variable-frequency pump stops, the frequency is reduced while the speed remains unchanged

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