Motors & Motor Controls en VFD Overcurrent Fault <div class="node-body forum-body"><p>I work in a plant the produces power cables for the oil and gas industries. We have an extrusion line that has a 150 HP&nbsp;motor being run by a 200 HP&nbsp;VFD (Baldor VS1GV). We are currently having issues with overcurrent faults. In conjunction with the overcurrent fault, we have also seen (on occasion and once all four at the same time) high DC buss faults and peak overvoltage faults. We have checked the mechanical drive train (gearbox, belts, bearings, and pulleys) and all appear to be in good working order. We have performed an&nbsp;auto tune and everything passed fine.</p> </div><div class="og_rss_groups"></div><p><a href="" target="_blank">read more</a></p> Motors & Motor Controls Thu, 09 Apr 2015 23:31:30 +0000 113631 at Brushless DC Motors <div class="node-body forum-body"><p><span>New Product - Power Source Requirement</span><br /> <span>We are&nbsp;looking for a supplier of Brushless&nbsp;DC Motors, preferably in a disc configuration delivering&nbsp;4 neutron meters of torque between 3,000 to 3,500 RPM with a DC Bus&nbsp;in the range of 12 - 48 VDC, preferably at the higher DC voltage limit.</span><br /> <span>Thank You!</span><br /> <span>Stephen Gibson</span><br /> Gibson Consulting Services</p> </div><div class="og_rss_groups"></div> Motors & Motor Controls Mon, 18 Aug 2014 17:52:10 +0000 51461 at VFD driven motor shuts down an turns back on automatically <div class="node-body forum-body"><p>I have an Avitar 71 VFD on a 100 hp conveyer that intermittently shuts down and turns itself back on. it has happened four times thus far, and every time it happens it is at the same time of day. There has never been a fault and the &quot;trips&quot; are not on consecutive days. It&#39;s ramndom, with the exception that it happens at the exact same time of day.</p> </div><div class="og_rss_groups"></div> Motors & Motor Controls Mon, 21 Jul 2014 14:45:59 +0000 49331 at Motor Overload Protection <div class="node-body forum-body"><p>I have a question about the setting of an overload. We have several applications where the motor may have a SF of 1.37 or 1.4 (water pumping). The motor operates around 125% of FLA and will trip the overload after sometime of running since it is a continuous applicaiton. Is there anything in the Code that gives us some leeway to adjust this setting up just a little bit to account for the larger SF or is only 125% allowed?<br /> <span>Thanks in advance for any advice you can offer.</span><br /> <span>Brad</span></p> </div><div class="og_rss_groups"></div> Motors & Motor Controls Thu, 17 Jul 2014 18:31:55 +0000 49201 at VFD short circuit/ground fault <div class="node-body forum-body"><p>We have an ABB DC drive. When we start it and it runs with little to no load on it (100 amps) there&#39;s no problem. However, when we get up over that 100A, the drive goes to ground fault or short circuit. Was wondering what everyone&#39;s input would be on what could possibly be wrong. Any help is appreciated.</p> </div><div class="og_rss_groups"></div> Motors & Motor Controls Sat, 28 Jun 2014 01:59:11 +0000 48411 at VFD controls <div class="node-body forum-body"><p>We have a problem in my plant with VFDs using an ice cube type relay for the start circuit. These relays are 120vac coils with a PLC output energizing them. Quite ofter when the output is off the relay will remain energized. I am assuming that the leakage voltage from the transistor output of the PLC is just enough to hold the relay. If the relay is pulled and put back it will not energize until the PLC output is high again. I am hoping that adding a bleeder resistor accross the relay coil will cure the problem.</p> </div><div class="og_rss_groups"></div><p><a href="" target="_blank">read more</a></p> Motors & Motor Controls Tue, 29 Apr 2014 22:01:54 +0000 45471 at Motor feed wire heating <div class="node-body forum-body"><p>What are the requirements for connecting a motor feed wire (250 MCM THHN) to the 2/0 class F motor leads? Is a section of 250 MCM 180<sup>0</sup>C wire required between the 250 MCM THHN feeder wire and the 2/0 motor leads? We are seeing signs of heating on the THHN insulation near the connection. The 2/0 motor leads extend out from the motor about 6 inches. &nbsp;The motor is rated 460V, 3ph, 250 hp with 6 leads.</p> </div><div class="og_rss_groups"></div> Motors & Motor Controls Tue, 01 Apr 2014 19:54:35 +0000 43941 at Motor-Driven System Improvement Projects <div class="node-body forum-body"><p>The Motor Decisions Matter campaign is no longer just focused on motors. In mid 2013, the program expanded to include motor-driven systems. Do you have any success stories you can share with us, which delivered substantial energy cost savings?</p> </div><div class="og_rss_groups"></div> Motors & Motor Controls Fri, 14 Feb 2014 02:08:16 +0000 41361 at