ASTM F2361-03(2013)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2361 − 03 (Reapproved 2013) An American National Standard
Standard Guide for
Ordering Low Voltage (1000 VAC or Less) Alternating
Current Electric Motors for Shipboard Service—Up to and
Including Motors of 500 Horsepower
This standard is issued under the fixed designation F2361; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Institute of Electrical and Electronic Engineers
(IEEE):
1.1 This guide covers the required basic ordering informa-
IEEE Standard 45 Recommended Practice for Electrical
tion for low voltage (1000 VAC or less) general-purpose,
Installations on Shipboard
commercial, universal, small and medium sized alternating
IEEE Standard 112 Standard Test—Procedure for Poly-
current electric motors for shipboard use, up to and including
phase Induction Motors and Generators
motors of 500 hp.
2.3 National Electrical Manufacturers Association (NEMA)
1.2 The electric motors covered by this guide are general-
Standard:
purpose (GP) motors intended to drive common shipboard
NEMA Standard MG-l Motors and Generators
mechanical machinery such as fans, blowers, centrifugal and
2.4 National Fire Protection Association (NFPA):
screw pumps.
NFPA 70 National Electrical Code
1.3 This guide is not intended to be used to order special-
3. Terminology
purpose (SP) motors or definite-purpose motors (for example,
3.1 Definitions of Terms Specific to This Standard:
cryogenic service) or motors for use in hazardous (classified)
3.1.1 closed-coupled—a special design where the motor
locations as defined by the National Electrical Code (NFPA
features a face mounting flange that the pump casing mounts
70).
to, and a motor shaft extension on which the pump impeller is
1.4 This standard does not purport to address all of the
mounted.
safety concerns, if any, associated with its use. It is the
3.1.2 dripproof—a machine enclosure that allows the motor
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- to be cooled by ambient air having ventilation openings that
allow operation when drops of liquid or solid particles strike
mine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accor- the enclosure at any angle from zero to 15°.
dance with internationally recognized principles on standard-
3.1.3 drive method—the method of driving the equipment,
ization established in the Decision on Principles for the
such as direct, belt, gearbox, or chain.
Development of International Standards, Guides and Recom-
3.1.4 effıciency classes—standard efficiency classes estab-
mendations issued by the World Trade Organization Technical
lished by NEMA based on motor performance.
Barriers to Trade (TBT) Committee.
3.1.5 end shield—a machined flange or base which have
rabbets and bolt holes for mounting equipment to the motor or
2. Referenced Documents
for overhanging the motor on a driven machine.
2.1 Canadian Standards Association (CSA):
3.1.6 frame size—standard sizes established by NEMA
CSA Standard C390-93C Energy Efficiency Test Methods
based on motor power and speed.
for Three-Phase Induction Motors General Instruction
No.1 3.1.7 mounting arrangement—the installed operating posi-
tion of the motor, such as horizontal, vertical shaft up, or
vertical shaft down.
This guide is under the jurisdiction of ASTM Committee F25 on Ships and
Marine Technology and is the direct responsibility of Subcommittee F25.10 on
Electrical. Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE),
Current edition approved Oct. 1, 2013. Published October 2013. Originally 445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331, http://www.ieee.org.
approved in 2003. Last previous edition approved in 2009 as F2361 – 03 (2009). Available from National Electrical Manufacturers Association (NEMA), 1300
DOI: 10.1520/F2361-03R13. N. 17th St., Suite 1752, Rosslyn, VA 22209, http://www.nema.org.
Available from Canadian Standards Association (CSA), 5060 Spectrum Way, Available from National Fire Protection Association (NFPA), 1 Batterymarch
Mississauga, ON L4W 5N6, Canada, http://www.csa.ca. Park, Quincy, MA 02169-7471, http://www.nfpa.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2361 − 03 (2013)
3.1.8 multi-speed—a motor that can operate at more than 3.1.25 weather protected—a machine with ventilating pas-
one speed, typically at two or three speeds. sages so constructed as to minimize the entrance of rain, snow
and airborne particles to the electrical components.
3.1.9 NEMA design classes—design classifications desig-
nated by NEMA (see NEMA Standard MG-1) for motors that
4. General Requirements for Electric Motor Ordering
provides information to the end user on characteristics such as
motor starting, torque, voltage, and so forth. 4.1 Electric Motor Ordering Requirements:
4.1.1 With each electric motor ordered for marine service,
3.1.10 NEMA insulation classes—NEMA system that clas-
provide the following, to the greatest extent practicable:
sifies motor insulation systems by their ability to withstand a
4.1.1.1 Electrical Input—Voltage, phases and frequency.
specified temperature for a specified length of time with
4.1.1.2 Speed (Synchronous or Full Load)—r/min.
minimum deterioration.
4.1.1.3 Power—Thehorsepowerofthemotormustbestated
3.1.11 polyphase medium motors—motors which have
as a standard NEMA rating. At a minimum, consideration
windings so arranged to accept to polyphase voltage sources.
should be given to the needed starting torque, capability to
accelerate the load to full running speed and maximum
3.1.12 service factor—service factor for an ac motor is a
overload.
multiplier, which when applied to the rated horsepower,
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