Switch selection for device startup
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For some large-scale equipment, the start switch must be set to automatic mode in order to start them; they won’t start if set to manual mode. Why is that? \ud83d\ude04 I would also like to ask everyone how the manual, automatic, and zero positions on the on-site control panel are designed and configured – why do we need to set them this way? I’m trained in process engineering, so I hope everyone can offer me some guidance
The startup of any large-scale equipment must meet relevant conditions before it can be started; otherwise, accidents may occur! For example, before starting a conventional centrifugal compressor, it is common to ensure that the oil pressure and oil temperature are within the required ranges, that the discharge valve at the compressor outlet or the anti-surge valve is fully open, and that the opening degree of the inlet butterfly valve is at its minimum allowable value. As for the manual, automatic, and zero positions on-site, generally speaking, manual mode refers to manual verification of whether the relevant conditions are met, while automatic mode involves the use of relevant sensors on the unit to determine whether it is ready to start; the zero position corresponds to the stopped state. The above suggestions are for reference only; it is recommended to follow the instructions provided with the specific device!
Thank you, Haiyou, for your guidance\ud83d\udc4d\ud83d\udc4d\ud83d\udc4d