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Elk River <br /> Municipal Utilities UTILITIES COMMISSION MEETING <br /> TO: FROM: <br /> Elk River Municipal Utilities Commission Eric Volk-Water Superintendent <br /> John Dietz—Chair <br /> Al Nadeau—Vice Chair <br /> Daryl Thompson—Trustee <br /> MEETING DATE: AGENDA ITEM NUMBER: <br /> May 20, 2014 5.6 <br /> SUBJECT: <br /> New Motor and Variable Frequency Drive (VFD) for Well#5 <br /> BACKGROUND: <br /> On Tuesday,April 13th it was determined by ERMU and E.H. Renner staff that the well motor <br /> for Well#5 had shorted out. <br /> DISCUSSION: <br /> The well motor at Well#5 shorted out prematurely. The motor was rebuilt 2 years ago. Though <br /> we are not sure exactly why this happened, we do believe that the soft start is partially to blame. <br /> The soft starts are inherently bad for submersible motors. With the upcoming summer, and no <br /> doubt increasing demand for water,we need to install a new well motor as soon as possible. It's <br /> our intent to replace the soft start with a VFD as the VFD has programming built into it so the <br /> chances of this happening again are much slimmer. We also have to purchase a dV/dT filter <br /> because the well motor is approximately 300 feet away from the power source. <br /> We are conducting assessments on Wells 2, 3, 4, and 6 to replace the soft starts with VFDs <br /> before any damage is done to the motors that are currently in place. Wells 7, 8, and 9 already <br /> have VFDs installed. We'll come back to the commission in June with a recommendation. <br /> ACTION REQUESTED: <br /> Staff requests Commission approval for the purchase and installation of a new well motor, VFD, <br /> and dV/dT filter for Well #5. <br /> ATTACHMENTS: <br /> • Motor Quote <br /> • Filter Quote <br /> POWERED BY <br /> 3 Page 1 of 1 NATURE <br /> Reliable Public <br /> Power Provider P O W E R E D T O S E R V E <br /> 116 <br />