Motors & Motor Controls en Membrane Switches <div class="node-body forum-body"><p>I&rsquo;m designing a hand-held device for a client, and I&rsquo;m in need of a membrane switch keypad. One of the requirements is that the keypad be manufactured to withstand moisture.&nbsp;Do you know any companies who specialize in very tough keypads for rigorous environments?</p> </div> Motors & Motor Controls Mon, 08 May 2017 16:24:16 +0000 147941 at Transporter Tool Safety <div class="node-body forum-body"><p>Hey guys,</p> <p>I need&nbsp;some advice&nbsp;for safety of my working tools stored in my transporter. Is there some kind of box system&nbsp;available to help me store things in my overfilled&nbsp;car? Does anyone have any recommendations?</p> <p>Thanks!<br /> Klaus</p> </div> Motors & Motor Controls Wed, 12 Apr 2017 09:32:08 +0000 147101 at Replace a Motor Control <div class="node-body forum-body"><p>I have acquired an old plate roll that has no motor controls. The primary motor is a 15 HP,&nbsp;460VAC,&nbsp;21.3A,&nbsp;1,150 RPM, Westinghouse &quot;Life Line&quot; (it is dual voltage, but my building is wired 460V). There is a reference to a Rotor Circuit @ 240V&nbsp;32.5A. I don&#39;t know what that is.</p> <p>I need to find a way to drive this. Can someone describe the control mechanisms required? My electrical experience is limited so if I could get a specific component list that would be very helpful.</p> <p>Thank you!</p> </div> Motors & Motor Controls Mon, 27 Feb 2017 15:34:42 +0000 145751 at AC vs DC Motors in Industrial Applications <div class="node-body forum-body"><p><span>I do a lot of electrical MCC and PLC designs for wood mills and mines, and we almost&nbsp;always use 600V AC premium-efficiency motors. My boss came up to me today and he was apparently told that he should switch out his AC fan motor for his home furnace out to DC, because the current consumption would be 1/3 with the DC motor. So my boss then comes to ask me why won&#39;t we use DC motors in an industrial setting instead of all these AC motors?</span></p> </div><p><a href="" target="_blank">read more</a></p> Motors & Motor Controls Sat, 04 Feb 2017 01:10:55 +0000 144991 at Burning of Thermal Protection <div class="node-body forum-body"><p>I am currently doing investigations at a company where the thermal overload of the motor burns through on two of the three phases. The motor is not damaged and the overcurrent protection does not trip. Measurements show that all three phases are present so it is not that the motor runs on two phases. The unit&#39;s&nbsp;contacts melt completely. We do not have an idea what can cause this kind of damage.&nbsp;It is a high current, but very short and fast. When working on a generator&nbsp;we do not seem to have the problem. It is only when connected to the power grid.</p> </div><p><a href="" target="_blank">read more</a></p> Motors & Motor Controls Sun, 22 Jan 2017 11:55:59 +0000 144671 at Error Light on Industrial Press <div class="node-body forum-body"><p>Hello all,</p> </div><p><a href="" target="_blank">read more</a></p> Motors & Motor Controls Thu, 13 Oct 2016 18:49:28 +0000 141281 at VFD FAULTS <div class="node-body forum-body"><p>I have a Powerflex 40 that is giving me a fault code 71, which is NET ADAPTOR LOSS, quite frequently. &nbsp;It does seem happen at relatively simular&nbsp;times of the day, although nothing else in the same MCC seems to be affected. &nbsp;Does anyone have any experience with this and what have you found to be the culprit? &nbsp;Also another thing that seemed odd was when the drive faults and I reset the drive on the HIM and start again, the HIM shows amps being drawn but no hertz. &nbsp;Power has to be cycled for the motor to start. &nbsp;</p> </div> Motors & Motor Controls Sun, 11 Sep 2016 05:51:50 +0000 139861 at Motor Protection Fuse Size <div class="node-body forum-body"><p>Hi there! I&#39;m looking for some advice.</p> <p>I&nbsp;want to know if a fuse rating of 12R, 2.54kV&nbsp;can be used for a motor rated&nbsp;2.4kV,&nbsp;60 Hz, 3-phase,&nbsp;462kW,&nbsp;620 Hp,&nbsp;130A. Is the mentioned fuse size&nbsp;suitable for the motor? The existing fuse was 12R, 5.08kV&nbsp;max. How does my suggested fuse&nbsp;differ?</p> <p>Thank you.</p> </div> Motors & Motor Controls Wed, 03 Aug 2016 08:36:34 +0000 138531 at Motor Controller for Submersible Pump <div class="node-body forum-body"><p>Which is a more suitable motor controller for a 30 HP&nbsp;submersible pump;&nbsp;wye-delta&nbsp;or autotransformer? Which is more advantageous? Can anyone let me see a sample schematic diagram for autotransformer controller, with auto/manual selector? I&#39;d&nbsp;like to integrate the deep&nbsp;well level and&nbsp;water tank level switch for the pump auto mode, and want to know where to connect the level switch terminals.</p> </div><p><a href="" target="_blank">read more</a></p> Motors & Motor Controls Wed, 13 Jul 2016 06:34:42 +0000 137721 at wye delta control computation <div class="node-body forum-body"><p>I have two&nbsp;motors: one is rated 30 hp&nbsp;and the other&nbsp;25 hp. They are both submersible pumps. They have six leads, wye to delta or whatsoever. All I&nbsp;want to do is to make a wye-delta control. But my problem is I don&#39;t&nbsp;know how to make it. I mean the computation from main breaker to sub breaker, wire size to be used in breaker to contactor and from overload to motor. Can you please help me?</p> </div> Motors & Motor Controls Sat, 16 Apr 2016 15:06:00 +0000 134531 at