ASTM F2361-03(2009)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F2361 − 03(Reapproved 2009) 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 IEEE Standard 112 Standard Test—Procedure for Polyphase
Induction Motors and Generators
1.1 This guide covers the required basic ordering informa-
2.3 National Electrical Manufacturers Association (NEMA)
tion for low voltage (1000 VAC or less) general-purpose,
Standard:
commercial, universal, small and medium sized alternating
NEMA Standard MG-l Motors and Generators
current electric motors for shipboard use, up to and including
2.4 National Fire Protection Association (NFPA):
motors of 500 hp.
NFPA 70 National Electrical Code
1.2 The electric motors covered by this guide are general-
purpose (GP) motors intended to drive common shipboard
3. Terminology
mechanical machinery such as fans, blowers, centrifugal and
3.1 Definitions of Terms Specific to This Standard:
screw pumps.
3.1.1 closed-coupled—a special design where the motor
1.3 This guide is not intended to be used to order special-
features a face mounting flange that the pump casing mounts
purpose (SP) motors or definite-purpose motors (for example,
to, and a motor shaft extension on which the pump impeller is
cryogenic service) or motors for use in hazardous (classified)
mounted.
locations as defined by the National Electrical Code (NFPA
3.1.2 dripproof—a machine enclosure that allows the motor
70).
to be cooled by ambient air having ventilation openings that
1.4 This standard does not purport to address all of the
allow operation when drops of liquid or solid particles strike
safety concerns, if any, associated with its use. It is the
the enclosure at any angle from zero to 15°.
responsibility of the user of this standard to establish appro-
3.1.3 drive method—the method of driving the equipment,
priate safety and health practices and determine the applica-
such as direct, belt, gearbox, or chain.
bility of regulatory requirements prior to use.
3.1.4 effıciency classes—standard efficiency classes estab-
2. Referenced Documents
lished by NEMA based on motor performance.
3.1.5 end shield—a machined flange or base which have
2.1 Canadian Standards Association (CSA):
rabbets and bolt holes for mounting equipment to the motor or
CSA Standard C390-93C Energy Efficiency Test Methods
for overhanging the motor on a driven machine.
for Three-Phase Induction Motors General Instruction
No.1
3.1.6 frame size—standard sizes established by NEMA
based on motor power and speed.
2.2 Institute of Electrical and Electronic Engineers
(IEEE):
3.1.7 mounting arrangement—the installed operating posi-
IEEE Standard 45 Recommended Practice for Electrical
tion of the motor, such as horizontal, vertical shaft up, or
Installations on Shipboard
vertical shaft down.
3.1.8 multi-speed—a motor that can operate at more than
one speed, typically at two or three speeds.
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
3.1.9 NEMA design classes—design classifications desig-
Electrical.
nated by NEMA (See NEMA Standard MG-1) for motors that
Current edition approved March 1, 2009. Published March 2009. Originally
approved in 2003. Last previous edition approved in 2003 as F2361 - 03. DOI:
10.1520/F2361-03R09.
2 4
Available from Canadian Standards Association (CSA), 5060 Spectrum Way, Available from National Electrical Manufacturers Association (NEMA), 1300
Mississauga, ON L4W 5N6, Canada, http://www.csa.ca. N. 17th St., Suite 1752, Rosslyn, VA 22209, http://www.nema.org.
3 5
Available from Institute of Electrical and Electronics Engineers, Inc. (IEEE), Available from National Fire Protection Association (NFPA), 1 Batterymarch
445 Hoes Ln., P.O. Box 1331, Piscataway, NJ 08854-1331, http://www.ieee.org. 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 (2009)
TABLE 1 Sample Electric Motor Ordering Checklist
provides information to the end user on characteristics such as
motor starting, torque, voltage, and so forth. Design Parameter Unit, Value, Other
Electrical Input Voltage, Phase,
3.1.10 NEMA insulation classes—NEMA system that clas-
Frequency
sifies motor insulation systems by their ability to withstand a
Speed r/min (single speed, two
specified temperature for a specified length of time with speed, VSD)
Power
minimum deterioration.
Enclosure Type per NEMA MG-1
3.1.11 polyphase medium motors—motors which have Duty Cycles Continuous or Other
Ambient Temperature °C
windings so arranged to accept to polyphase voltage sources.
Insulation Class per NEMA MG-1
Design Class per NEMA MG-1
3.1.12 service factor—service factor for an ac motor is a
Service Factor 1.0 or Other
multiplier, which when applied to the rated horsepower,
Drive Method Specify
indicates a permissible horsepower loading which may be
Mounting Arrangement Specify
Mounting Flange (end shield) Yes or No
carried under the conditions specified for the service factor.
Rotation CW, CCW, Reversible
3.1.13 single-phase fractional horsepower motors—motors
Motor conduit box Location F1, F2
Closed-Coupled Yes or No
with ratings up to 1 hp which use single-phase power.
Efficiency Standard, High, Premium
3.1.14 single-phase integral horsepower motors—motors Special Requirements Spe
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