ASTM F2361-03

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An American National Standard
Designation:F2361–03
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 F 2361; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope Polyphase Induction Motors and Generators
2.3 National Electrical ManufacturersAssociation (NEMA)
1.1 This guide covers the required basic ordering informa-
Standard:
tion for low voltage (1000 VAC or less) general-purpose,
NEMA Standard MG-l Motors and Generators
commercial, universal, small and medium sized alternating
2.4 National Fire Protection Association (NFPA):
current electric motors for shipboard use, up to and including
NFPA 70 National Electrical Code
motors of 500 hp.
1.2 The electric motors covered by this guide are general-
3. Terminology
purpose (GP) motors intended to drive common shipboard
3.1 Definitions of Terms Specific to This Standard:
mechanical machinery such as fans, blowers, centrifugal and
3.1.1 closed-coupled—a special design where the motor
screw pumps.
features a face mounting flange that the pump casing mounts
1.3 This guide is not intended to be used to order special-
to, and a motor shaft extension on which the pump impeller is
purpose (SP) motors or definite-purpose motors (for example,
mounted.
cryogenic service) or motors for use in hazardous (classified)
3.1.2 dripproof—a machine enclosure that allows the motor
locations as defined by the National Electrical Code (NFPA
to be cooled by ambient air having ventilation openings that
70).
allow operation when drops of liquid or solid particles strike
1.4 This standard does not purport to address all of the
the enclosure at any angle from zero to 15°.
safety concerns, if any, associated with its use. It is the
3.1.3 drive method—the method of driving the equipment,
responsibility of the user of this standard to establish appro-
such as direct, belt, gearbox, or chain.
priate safety and health practices and determine the applica-
3.1.4 effıciency classes—standard efficiency classes estab-
bility of regulatory requirements prior to use.
lished by NEMA based on motor performance.
2. Referenced Documents 3.1.5 end shield—a machined flange or base which have
rabbets and bolt holes for mounting equipment to the motor or
2.1 Canadian Standards Association (CSA):
for overhanging the motor on a driven machine.
CSA Standard C390-93C Energy Efficiency Test Methods
3.1.6 frame size—standard sizes established by NEMA
for Three-Phase Induction Motors General Instruction
based on motor power and speed.
No.1
3.1.7 mounting arrangement—the installed operating posi-
2.2 Institute of Electrical and Electronic Engineers
3 tion of the motor, such as horizontal, vertical shaft up, or
(IEEE):
vertical shaft down.
IEEE Standard 45 Recommended Practice for Electrical
3.1.8 multi-speed—a motor that can operate at more than
Installations on Shipboard
one speed, typically at two or three speeds.
IEEE Standard 112 Standard Test—Procedure for
3.1.9 NEMA design classes—design classifications desig-
nated by NEMA (See NEMA Standard MG-1) for motors that
provides information to the end user on characteristics such as
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
motor starting, torque, voltage, and so forth.
Electrical.
Current edition approved Dec. 1, 2003. Published December 2003.
2 4
Available from Canadian Standards Association (CSA), 178 Rexdale Blvd., Available from National Electrical Manufacturers Association (NEMA), 1300
Toronto, ON Canada M9W1R3. N. 17th St., Suite 1847, Rosslyn, VA 22209.
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 Park, Quincy, MA 02269-9101.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2361–03
TABLE 1 Sample Electric Motor Ordering Checklist
3.1.10 NEMA insulation classes—NEMA system that clas-
sifies motor insulation systems by their ability to withstand a Design Parameter Unit, Value, Other
specified temperature for a specified length of time with
Electrical Input Voltage, Phase, Frequency
Speed r/min (single speed, two speed, VSD)
minimum deterioration.
Power
3.1.11 polyphase medium motors—motors which have
Enclosure Type per NEMA MG-1
windings so arranged to accept to polyphase voltage sources. Duty Cycles Continuous or Other
Ambient Temperature °C
3.1.12 service factor—service factor for an ac motor is a
Insulation Class per NEMA MG-1
multiplier, which when applied to the rated horsepower,
Design Class per NEMA MG-1
Service Factor 1.0 or Other
indicates a permissible horsepower loading which may be
Drive Method Specify
carried under the conditions specified for the service factor.
Mounting Arrangement Specify
Mounting Flange (end shield) Yes or No
3.1.13 single-phase fractional horsepower motors—motors
Rotation CW, CCW, Reversible
with ratings up to 1 hp which use single-phase power.
Motor conduit box Location F1, F2
3.1.14 single-phase integral horsepower motors—motors
Closed-Coupled Yes or No
Efficiency Standard, High, Premium
with ratings of 1 hp up to and including 10 hp, which normally
Special Requir
...