This vibration is the result of rotor and stator forces on the bearings acting with in the system. Esr motor systems, llc rock hill, south carolina 29730 phone. Ieee 841 identifies the recommended practice for chemical industry severe duty squirrelcage induction motors, 600 v and below. Designed for use in severely corrosive environments cast iron frame, end shields and fan cover improve rigidity and reduce vibration limited to. Standard format for iec standards learning from motor.
Siemens says its a completely new motor design for 125 400 hp, 3,600 rpm applications. Petrochemical ac induction motor standards ieee 841, api. Various increments of voltage imbalance from 1% up to 10% were tested and monitored on several pole speeds. Toshibas ieee 841 motors are available up to 300 horsepower with 2, 4, or 6 poles, 460 or 575v, and come standard with a 5 year warranty. The section on costs considers the cost of motor vibration in. It was first issued in 1986 and was significantly revised and reissued as a standard in 1994. When compared to older standard tefc industrial motors, ieee 841 motors are more effi cient nema premium, lower temperature rise, low in sound power, and lower in vibration.
Easa mechanical reference handbook evans enterprises. Ieee standards interpretation for ieee std 8411994 ieee standard for the. The unfiltered vibration limits for resiliently mounted standard machines having no special vibration requirements, based on rotational speed, are shown in the table on page 5 unfiltered vibration limits. Ieee std 1122004, ieee standard test procedure for polyphase. Engineered to address the common causes of motor failure. The footing works for nearly any retrofit and a broad selection of options makes custom orders a thing of the past, allowing for optimal performance in diverse operating conditions. Ieee 841 identifies the recommended practice for chem. Final attempt are made to quantify the cost of motor vibration in terms of equipment life.
This industry standard created for the petroleum and chemical industry to improve the reliability, efficiency and performance of severe duty motors used in those applications. Search weg ieee std 841 2009nemapremiumefficiencymotorswith inproseal usaieee841brochureenglish. While these specifications are specific to ieee 841 rated motors, many of them are incorporated into severe duty motors for the general market. Shaft limit on shaft runout reduced vibration all cast iron construction structural integrity, corrosion resistance and frames, endshields longer life. Some additional modifications, however, are usually required to make the ieee 841. Electrical and instrumentation ncrs on projects paktechpoint. Search wegieeestd8412009nemapremiumefficiencymotorswith inproseal usaieee841brochureenglish. Recent technological advances in microfabrication and fiber optics have made practical the construction of very small, sensitive sensors for acoustic or vibration measurements. Exclusively distributed by worldwide electric, these motors include added features like. The sd100 ieee841 electric motor from siemens is a lowvibration, nema premium motor for severeduty applications, such as pumps, blowers and fans.
Exclusive weg painting system exceed 200hrs astm 117 corrosion test exceeds ieee 841 standard balanced to 0. Petrochemical ac induction motor standards a comparison between ieee 841, api 541 and api 547 4 iv. Saesb054 requires that all means of access and egress be unobstructed. Grease inlet fittings and reliefs on both ends of motor make lubrication maintenance easy. This paper is a view of motor vibration from the motor perspective covering horizontal ieee 841 motors. Department of energy doe office of energy efficiency and renewable energy eere with support from the copper. Petrochemical ac induction motor standards a comparison between ieee 841, api 541 and api 547 3. Apr 15, 2010 siemens says its a completely new motor design for 125 400 hp, 3,600 rpm applications. Petrochemical ac induction motor standards ieee 841, api 541. This paper presents the authors views on some of the more ambiguous elements of the standard and on the application of harmonic limits in general. Ieee standards interpretation for ieee std 8411994 ieee.
The motor is built to yield vibration limits below the very strict requirements of the ieee 841 standard, especially at 120 hz levels. Search wegieeestd8412009nemapremiumefficiencymotors. As the sensitivity is increased or the size is decreased, a sensor becomes more susceptible to. Automatic grease relief fitting on both ends of motor foot pad planity within 0. Ieee841 identifies the recommended practice for chemical industry severe. Motor frame designations also are from mg 1, and nema vibration and noise standards are. The baldor ieee 841 motor will be found in aboveground mines, cement plants, chemical plants and paper plants.
Nema motor standards provide foundation for industry nema blog. Ieee25036449ts ieee841 rigid base worldwide electric. This offers a more reliable motor to users in process industries oil and gas, petrochemical, paper, utilities. There are many variables to consider when purchasing or replacing electric motors. Iec standards perform a very important role in enabling international trade of electric equipment. It defines the two major causes of vibration related to design and construction in motors and offers suggestions for improving motor vibration. Nema super e premium efficient motors motors and generators abb 3 nema super e premium efficient motors totally enclosed fan cooled tefc motor design features the family of baldorreliance supere tefc totallyenclosed fancooled motors share a number of electrical and mechanical features that add up to outstanding value. Our line of 841xl motors are designed to meet and exceed the requirements of ieee std. Esr motor systems, llc electric motors drives gearboxes. By defi nition these motors are of all cast iron construction, and include noncontact rotating labyrinth shaft seals. When comparing an ieee 841 to a standard tefc motor it typically.
Toshibas eqpglobal841 motors are designed to specifically address the needs of the petrochemical industry where premium performance and reliability are imperative. Coated to prevent corrosion 841xl motors are guaranteed to meet ieee std. Ieee std 1122004, ieee standard test procedure for. Siemens new lowvibration motor exceeds ieee standards. Motor standards for the chemical process industry standard ieee.
Api 541 5th edition understanding the changes and updates to one of the petroleum industrys premier specifications bart sauer siemens industry, inc. A standard that works for many years industrial motor users struggled with properly specifying motors for their most severe applications. Advantage plus ieee 841 tecowestinghouse motors canada. Norwood motor plant mark chisholm siemens industry, inc. The standard limits the enclosure to totally enclosed. Four bolt conduit cover with glued neoprene gasket. The application also calls for it to conform to ieee 841 and it is on an inverter drive in a class 1 division 2 groups b,c,d, t3 hazlok. Product brochure nema supere premium efficient motors. Ieee841 identifies the recommended practice for chem.
These types of motors are designed to withstand extreme environmental conditions. The user is instructed to contact the motor manufacturer to determine suitability for. A baldor ieee 841 motor will come with the following. Com 3 the motor insulation system will be suitable for use with oil mist lubrication systems. Ieee std 1122004 revision of ieee std 1121996 112tm ieee standard test procedure for polyphase induction motors and generators 3 park avenue, new york, ny 100165997, usa ieee power engineering society. When that life is expended, the bearing fails unexpectedly. Mg 11998, 7 for special machines and ieee 841 are recommended. Toshibas eqpglobal 841 motors are designed to specifically address the needs of the petrochemical industry where premium performance and reliability are imperative. Vibration in an installed motor system can be caused by numerous variables. Customary units, relative to bearing housing using noncontact vibration probes for all hydrodynamic sleeve bearing machines with the. Description wegs w22 nema premium motors meet or exceed all nema premium requirements for energy efficiency. Conduits routed across areas restricting access and egress and creating tripping hazards. These weg ieee 841 w22 nema premium efficiency mill and chemical duty motors are specially suited for pulp and paper mills, petrochemical, steel mills and applications requiring severe duty long life motors. This paper will present actual test data collected along with a discussion on how these.
The standard limits the enclosure to totally enclosed, which is. Ieee841 motors available at kj electric 5year manufacturer warranty. While nema clearly defi ned and standardized motor ratings and performance, there was no consistent defi nition for motors used in the most severe environments. There is considerable debate as to precisely how some elements of ieee std 5191992 should be interpreted. This introduction is not part of ieee std 1122004, ieee standard test procedure for polyphase induction motors and generators. The frame, bearing housings, stator and rotor employ technologically advanced designs to surpass the demanding vibration requirements of the ieee standard 8412009. The advantage plus ieee 841 motors are engineered to operate many types of machinery in diverse industrial environments. Interpretations are issued to explain and clarify the intent of a standard and do not con.
Ieee std 1122004 revision of ieee std 1121996 112tm ieee standard test procedure for polyphase induction motors and generators 3 park avenue, new york, ny 100165997, usa. Use with adjustable speed drives ieee 841 2001 allows for the motor to be operated from an adjustable speed drive asd as an unusual service condition. Premium efficiency motor selection and application guide i acknowledgments the premium efficiency motor selection and application guide and its companion publication, continuous energy improvement in motordriven systems, have been developed by the u. Ieee 8412001 allows for the motor to be operated from an adjustable speed drive asd as an unusual service condition.
Customary units for sleeve and antifriction bearing machines with the machine securely fastened to a massive foundation. Robust bearing system double row angular contact thrust bearings with l10 rated life at 26,280 hrs low vibration with precision balance that exceeds ieee 841. Unbalance vibration at ix rotational speed, vibration due to magnetic forces. Leeson three phase severe duty ieee 841 premium electric motors are designed for harsh environments that you may find in refineries, aboveground mines, foundries, paper and pulp mills, cement plants or other severe duty applications requiring a premium efficient motor. The simotics sd200 low voltage motor from siemens combines flexibility, performance and efficiency to meet any customer need. What is the advantage, and is there evidence that it contributes significantly to motor life. Standard format for iec standards learning from motor standards for other electric equipment. The frame, bearing housings, stator and rotor employ technologically advanced designs to surpass the demanding vibration requirements of the ieee standard 841 2009. Vibration readings shall not exceed the levels specified in ieee std 8412009 at all frequencies or. The only point i can really see, andor make judgment on, would be to ask if this motor would be interchangeable with a proper nema mg 1 dimensioned motor of the same frame, i. Delivering full text access to the worlds highest quality technical literature in engineering and technology. Fundamental noise limits for miniature acoustic and. Exclusive weg painting system exceeds 200hrs astm 117 corrosion test exceeds ieee 841 standard balanced to 0. Ieee 841 motor vibration ieee conference publication.
Toshibas ieee841 motors are available up to 300 horsepower with 2, 4, or 6 poles, 460 or 575v, and come standard with a. If an existing motor is being replaced it would have been supplied with a manufacters nameplate offering all the details about the original motor necessary for offering a replacement. Advantage plus ieee 841 tecowestinghouse motors canada inc. Stainless steel nameplate laser etched with high contrast background. Users recognized that bearing failures were the lead. There are two major causes of vibration in ieee 841 motor. The scope has been increased to severe duty tefc squirrelcage induc. The ieee 841 standard also sets out specific guidelines for the construction of the main terminal box, which must be cast iron and gasketed. Offer above and beyond severe duty requirements with hyundai electric ieee841 motors.