Switching between power frequency and variable frequency
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There is one feed water pump that can operate in either normal frequency or variable frequency mode. So, what is used to enable the switching between these two modes?
On-site, there are manual and automatic modes; the manual mode usually operates at the power frequency, while the automatic mode is generally regulated via an inverter. The main difference lies in the wiring of the control circuit
There should be a switching control panel on-site, and switching can also be done from the power distribution room