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VFD |
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Some VFD systems still incorporate PRVs in case of VFD failure, which would lead to full-speed running of the pumps, but alternatives exist--such that the pumps shut off if a VFD or sensor fails. To maximize milk harvest energy conservation measures, Wylie suggests buying a vacuum pump with the highest relative efficiency, one that can be driven by a VFD. Specifically developed for VFD controlled AC motor applications, it prevents pitting, fluting, fusion craters and eliminates catastrophic motor failure while permanently protecting bearings from contamination. |
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