With the advancements in technology, VFD manufacturers have made low voltage VFD’s user friendly and interface-easy to a point that most electrically inclined customers can start up their own low voltage VFDs. This is not the case on Medium Voltage VFDs. The potential for damage to the equipment and personnel could be huge when it [...]
The EMA Blog
A VFD can be used as a softstarter. Medium and low voltage softstarters are less expensive than medium or low voltage variable frequency drives (VFD) . If a softstarter will do the job, then that’s often all you need. However, at EMA, we’ve seen situations where a softstarter was purchased and installed, only to discover [...]
EMA has acquired 9 1000 HP medium voltage Toshiba T300MVI VFDs. We are refurbishing and testing the units, which will carry a full warranty. We expect to have the first two ready to ship on or about November 20th. The units are 4160 volt input and output, in a standard enclosure. EMA will provide startup [...]
EMA began as a service company, doing drive and VFD service for a national customer base. At first, we rarely stocked any VFD equipment, although we did usually carry VFD parts. However, we now stock a large number of both low voltage and medium voltage VFDs, available for immediate shipment. Factory delivery times have increased [...]
EMA repairs Siemens Robicon Perfect Harmony medium Voltage VFD s. We have the power cells in stock and have a great reputation in this field. Robicon was purchased by Siemens primarily to acquire their well established medium voltage VFD. Many were sold into a variety of industries, including waste water and water treatment facilities. They’re [...]
The concept of using variable frequency drives to reduce energy costs is well established. Depending on which survey you read, around 80% of VFD s sold are sold, at least in part, for the purposes of saving energy. No serious person questions the fact that AC Drives save energy. Despite the fact that using variable [...]
EMA has always been privileged to have service relationships with some of the finest drive companies in the world. To list a few.. we have service relationships with WEG, with Toshiba, with Hitachi, with Danfoss, with LTI Servos, with Yaskawa, and most recently, with LS Industrial Systems, or LS Drives. You may not be familiar [...]
People operating the Siemens Robicon Perfect Harmony medium voltage VFD often don’t realize the need for replacing the bus capacitors after 7 years of operation. The chance of a bus capacitor failure increases exponentially after 7 years of operation due to degradation of the electrolyte and dielectric material. The situation is exacerbated by increased [...]
Variable Frequency Drive applications are rarely identical, even though at first glance, the VFD applications may look similar. Every VFD application is designed to meet specific needs. With that being the case, why do so many people accept “cookie cutter” products and services for their VFD applications? To be sure, Variable Frequency Drive manufacturers have [...]
VFD s can be provided either in a free standing NEMA 3R outdoor enclosure, OR, in what’s termed an “E-House.”EMA can provide almost any drive in a NEMA 3R outdoor configuration, and in partnership with Lectrus in Chattanooga can provide a VFD and its affiliated switchgear in an E-House configuration. Medium Voltage VFD s, due [...]
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God Bless You,”
by Barbara Harris, Emma Jacobs Newtie Boyd Womens Missionary Society
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