1、 General-purpose Form-wound Squirrel Cage Induction Motors250 Horsepower and LargerAPI STANDARD 547FIRST EDITION, JANUARY 2005General-purpose Form-wound Squirrel Cage Induction Motors250 Horsepower and LargerDownstream SegmentAPI STANDARD 547FIRST EDITION, JANUARY 2005SPECIAL NOTESAPI publications n
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13、publisher. Contact the Publisher, API Publishing Services, 1220 L Street, N.W., Washington, D.C. 20005.Copyright 2005 American Petroleum InstituteFOREWORDAPI publications may be used by anyone desiring to do so. Every effort has been made bythe Institute to assure the accuracy and reliability of the
14、 data contained in them; however, theInstitute makes no representation, warranty, or guarantee in connection with this publicationand hereby expressly disclaims any liability or responsibility for loss or damage resultingfrom its use or for the violation of any federal, state, or municipal regulatio
15、n with which thispublication may conflict.Suggested revisions are invited and should be submitted to API, Standards Department,1220 L Street, NW, Washington, DC 20005, standardsapi.org.iiiCONTENTSPage1 GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16、 . . . . . . . . . . . . . . 11.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 Usual Service Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3 Unusual Service Condi
17、tions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.4 Dimensions and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.5 Referenced Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、. . . . . . . . . . 12 BASIC DESIGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.2 Electrical Design .
19、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.3 Winding and Insulation Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32.4 Mechanical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . . . . . . 43 ACCESSORIES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.1 Terminal Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73.2 Winding Temperatur
21、e Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.3 Bearing Temperature Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83.4 Space Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22、 . . . . . . . . . . . . 83.5 Ground Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 INSPECTION, TESTING, AND PREPARATION FOR SHIPMENT . . . . . . . . . . . . 84.1 Final Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23、 . . . . . . . . . . . . . . . . . . . . . . . 84.2 Preparation For Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 GUARANTEE AND WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 VENDORS DATA. . . . . . . . . .
24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106.1 Proposals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106.2 Contract Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . 10APPENDIX A MOTOR DATA SHEETS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11APPENDIX B VENDOR DRAWING AND DATA REQUIREMENTS . . . . . . . . . . . 19APPENDIX C DATA SHEET GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26、. . . . . . . . 23TablesC-1 List of Liquids with an Autoignition Temperature (AIT) of LessThan 250C, Requiring Space Heaters with Heater Element SurfaceTemperature Less Than 200 (Extracted from NFPA 497-2004) . . . . . . . . . . . . . 26v1General-purpose Form-wound Squirrel Cage Induction Motors250
27、Horsepower and Larger1 General1.1 SCOPEThis standard covers the requirements for form-woundinduction motors for use in general-purpose petroleum,chemical and other industrial severe duty applications. Thesemotors:a. Are rated 250 hp (185 kW) through 3000 hp (2250 kW)for 4, 6 and 8 pole speeds.b. Are
28、 rated less than 800 hp (600 kW) for two-pole(3000 RPM or 3600 RPM) motors of totally-enclosedconstruction.c. Are rated less than 1250 hp (930 kW) for two-pole motorsof WP II type enclosures.d. Drive centrifugal loads.e. Drive loads having inertia values within those listed inNEMA MG 1 Part 20.f. Ar
29、e not induction generators.Note: Motors larger than that covered above and motors in otherapplications should be specified in accordance with API Std 541.1.2 USUAL SERVICE CONDITIONSUnless otherwise specified, motors conforming to thisstandard shall be suitable for operation within their ratingunder
30、 the following service conditions:a. Exposure to an ambient temperature in the range of 25Cto + 40C ( 13F to + 104F).b. Exposure to a maximum altitude of 3300 ft (1000 m)above sea level.c. Indoor or outdoor severe duty applications, such as humid,chemical (corrosive), or salty atmospheres.d. Horizon
31、tal mounting.e. Installation in a Class 1 Division 2 or Zone 2 location.f. Constant frequency sinusoidal input power.g. Not subject to frequent transient overvoltages (e.g., switch-ing surges, lightning).h. Direct coupled.1.3 UNUSUAL SERVICE CONDITIONSUnusual service conditions should be brought to
32、the atten-tion of those responsible for the design, manufacture, applica-tion, and operation of the motor. Among such unusualconditions are:a. Exposure to:1. Combustible, explosive, abrasive, or conductive dust.2. Dirty operating conditions where the accumulation ofdirt will interfere with normal ve
33、ntilation.3. Nuclear radiation.4. Abnormal shock, vibrations, or mechanical loadingfrom external sources.5. Abnormal axial or side thrust imposed on the motorshaft.6. Altitude or ambient temperature outside the range cov-ered in 1.2.7. Reciprocating or positive displacement loads.b. Conditions under
34、 which the variation from rated voltage orfrequency, or both, exceeds the limits given in NEMA MG 1.c. Conditions under which the ac supply voltage is unbal-anced by more than the limits given in NEMA MG 1.d. Operation at speeds other than rated speed.e. Operation from solid-state or other types of
35、adjustable fre-quency/adjustable voltage power supplies for adjustablespeed applications.f. Load inertia greater than and/or starting conditions moresevere than given in NEMA MG 1.g. Vertical mounting.Note: A round bullet () at the beginning of a paragraph indicatesthat either a decision is required
36、 or further information is to be pro-vided by the purchaser. This information should be indicated on thedata sheets (see Appendix A); otherwise it should be stated in thequotation request or in the order.1.4 DIMENSIONS AND STANDARDS1.4.1Both the SI and U.S. Customary system of unitsand dimensions ar
37、e used in this standard. Any data, draw-ings, or hardware (including fasteners) related to equip-ment supplied to this standard shall use the U.S. Customarysystem. 1.4.2This document recognizes two different systems ofstandards for the manufacturing and testing of electricalmotors: the North America
38、n ANSI, IEEE, and NEMA stan-dards; and the international IEC and ISO standards. TheNorth American standards are the base documents. Whenspecified by the purchaser, the corresponding internationalstandards are acceptable for use as alternatives; however, thismust not be construed that they are identi
39、cal to the NorthAmerican standards. The selection of which system of stan-dards to be utilized shall depend upon the machines applica-tion and site location. Note: The purchaser should be aware that specific requirements con-tained within corresponding standards may differ.1.5 REFERENCED PUBLICATION
40、SThe editions of the following standards, codes, and specifi-cations that are in effect at the time of publication of this stan-2 API STANDARD547dard shall, to the extent specified herein, form a part of thisstandard. The applicability of changes in standards, codes,and specifications that occur aft
41、er the inquiry shall be mutu-ally agreed upon by the purchaser and the vendor.APIStd 541Form-wound Squirrel-cage InductionMotors500 Horsepower and LargerStd 670 Machinery Protection SystemsABMA1Std 20Radial Bearings of Ball, Cylindrical Rollerand Spherical Roller Types, MetricDesign: Basic Plan for
42、Boundary Dimen-sions, Tolerances and Identification CodeASTM2A 345Flat-Rolled Electrical Steels for MagneticApplicationsIEC360034Rotating Electrical Machines60072Dimensions and Output Series for RotatingElectrical Machines60079Electrical Apparatus for Explosive GasAtmospheresEN 10126Cold Rolled Elec
43、trical Non-Alloyed SteelSheet and Strip Delivered in the Semi-Pro-cessed State EN 10165Cold Rolled Electrical Alloyed Steel Sheetand Strip Delivered in the Semi-ProcessedState IEEE443Recommended Practice for Testing Insula-tion Resistance of Rotating Machinery112Test Procedures for Polyphase Inducti
44、onMotors and Generators275 Recommended Practice for Thermal Evalu-ation of Insulation Systems for Alternating-Current Electric Machinery EmployingForm-Wound Preinsulated Stator Coils forMachines Rated 6900 V and Below 429Recommended Practice for Thermal Eval-uation of Sealed Insulation Systems for A
45、CElectric Machinery Employing Form-Wound, Preinsulated Stator Coils forMachines Rated 6900 V and Below522 IEEE Guide for Testing Turn-to-Turn Insu-lation on Form-Wound Stator Coils forAlternating-Current Rotating ElectricMachinesISO53506 Mechanical Properties of Corrosion-resis-tant Stainless Steel
46、FastenersNEMA6MG 1Motors and GeneratorsNFPA770National Electrical Code497Recommended Practice for the Classifica-tion of Flammable Liquids, Gases, orVapors and of Hazardous (Classified)Locations for Electrical Installations inChemical Process Areas. 2 Basic Design2.1 GENERAL2.1.1Motors shall be rate
47、d on a continuous-duty basis. Theoutput rating shall be expressed in power available at the shaftat the specified speed, frequency, and voltage.Note: Motors should be applied within their rating based on a ser-vice factor of 1.0. In those applications requiring a prolonged over-load capacity, the us
48、e of a higher power rating is recommended toavoid the reduction of insulation and bearing life associated withoperation above the 1.0 service factor.2.1.2Unless otherwise specified, the A - weighted maxi-mum sound pressure level of the motor shall not exceed85 dBA at any location at a reference dist
49、ance of 3 ft (1 m)with motor operating at no load, full voltage, rated fre-quency, and sinusoidal power. The measuring and reportingof sound pressure level data shall be in accordance withNEMA MG 1 Part 9. 2.1.3The motor and all of its auxiliary devices shall besuitable for and in accordance with the area classification sys-tem specified by the purchaser on the data sheets. Auxiliarydevices shall be listed or certified where required in accor-dance with the area classification system specified. 1American Bearing Manufacturers Association, 2025 M Street, NW,Suite 800,Washingt
