ASTM_F_2361_-_03_2013.pdf

Designation:F236103(Reapproved 2013)An American National StandardStandard Guide forOrdering Low Voltage(1000 VAC or Less)AlternatingCurrent Electric Motors for Shipboard ServiceUp to andIncluding Motors of 500 Horsepower1This standard is issued under the fixed designation F2361;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers the required basic ordering informa-tion for low voltage(1000 VAC or less)general-purpose,commercial,universal,small and medium sized alternatingcurrent electric motors for shipboard use,up to and includingmotors of 500 hp.1.2 The electric motors covered by this guide are general-purpose(GP)motors intended to drive common shipboardmechanical machinery such as fans,blowers,centrifugal andscrew pumps.1.3 This guide is not intended to be used to order special-purpose(SP)motors or definite-purpose motors(for example,cryogenic service)or motors for use in hazardous(classified)locations as defined by the National Electrical Code(NFPA70).1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.2.Referenced Documents2.1 Canadian Standards Association(CSA):2CSA Standard C390-93C Energy Efficiency Test Methodsfor Three-Phase Induction Motors General InstructionNo.12.2 Institute of Electrical and Electronic Engineers(IEEE):3IEEE Standard 45 Recommended Practice for ElectricalInstallations on ShipboardIEEE Standard 112 Standard TestProcedure for Poly-phase Induction Motors and Generators2.3 National Electrical Manufacturers Association(NEMA)Standard:4NEMA Standard MG-l Motors and Generators2.4 National Fire Protection Association(NFPA):5NFPA 70 National Electrical Code3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 closed-coupleda special design where the motorfeatures a face mounting flange that the pump casing mountsto,and a motor shaft extension on which the pump impeller ismounted.3.1.2 dripproofa machine enclosure that allows the motorto be cooled by ambient air having ventilation openings thatallow operation when drops of liquid or solid particles strikethe enclosure at any angle from zero to 15.3.1.3 drive methodthe method of driving the equipment,such as direct,belt,gearbox,or chain.3.1.4 effciency classesstandard efficiency classes estab-lished by NEMA based on motor performance.3.1.5 end shielda machined flange or base which haverabbets and bolt holes for mounting equipment to the motor orfor overhanging the motor on a driven machine.3.1.6 frame sizestandard sizes established by NEMAbased on motor power and speed.3.1.7 mounting arrangementthe installed operating posi-tion of the motor,such as horizontal,vertical shaft up,orvertical shaft down.3.1.8 multi-speeda motor that can operate at more thanone speed,typically at two or three speeds.3.1.9 NEMA design classesdesign classifications desig-nated by NEMA(See NEMA Standard MG-1)for motors that1This guide is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.10 onElectrical.Current edition approved Oct.1,2013.Published October 2013.Originallyapproved in 2003.Last previous edition approved in 2009 as F2361-03(2009).DOI:10.1520/F2361-03R13.2Available from Canadian Standards Association(CSA),5060 Spectrum Way,Mississauga,ON L4W 5N6,Canada,http:/www.csa.ca.3Available from Institute of Electrical and Electronics Engineers,Inc.(IEEE),445 Hoes Ln.,P.O.Box 1331,Piscataway,NJ 08854-1331,http:/www.ieee.org.4Available from National Electrical Manufacturers Association(NEMA),1300N.17th St.,Suite 1752,Rosslyn,VA 22209,http:/www.nema.org.5Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02169-7471,http:/www.nfpa.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 provides information to the end user on characteristics such asmotor starting,torque,voltage,and so forth.3.1.10 NEMA insulation classesNEMA system that clas-sifies motor insulation systems by their ability to withstand aspecified temperature for a specified length of time withminimum deterioration.3.1.11 polyphase medium motorsmotors which havewindings so arranged to accept to polyphase voltage sources.3.1.12 service factorservice factor for an ac motor is amultiplier,which when applied to the rated horsepower,indicates a permissible horsepower loading which may becarried under the conditions specified for the service factor.3.1.13 single-phase fractional horsepower motors motorswith ratings up to 1 hp which