dimensions of flange mounted ac induction motors

BIS 2003

B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

IS : 2223 1983(Reaffirmed 2000)

Edition 3.2(1993-01)

Price Group 5

Indian StandardDIMENSIONS OF FLANGE MOUNTED

AC INDUCTION MOTORS

( Second Revision )(Incorporating Amendment Nos. 1 & 2)

UDC 621.313.333.025 : 006.78

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IS : 2223 1983

BIS 2003

BUREAU OF INDIAN STANDARDS

This publication is protected under the Indian Copyright Act (XIV of 1957) andreproduction in whole or in part by any means except with written permission of thepublisher shall be deemed to be an infringement of copyright under the said Act.


AC INDUCTION MOTORS

( Second Revision )Rotating Machinery Sectional Committee, ETDC 15

Chairman Representing

SHRI S. G. RAMACHANDRA Indian Electrical Manufacturers Association,Bombay

MembersDR G. M. PHADKE ( Alternate to

Shri S. G. Ramachandra )SHRI R. S. ARORA Directorate General of Supplies & Disposals,

New DelhiSHRI K. L GARG ( Alternate )

SHRI P. R. BAPAT Guest, Keen, Williams Ltd, BombaySHRI A. S. ABHYANKAR ( Alternate )

CHIEF ENGINEER (E), II Central Public Works Department, New DelhiSURVEYOR OF WORKS II ( Alternate )

DIRECTOR (H. E. D. 1) Central Electricity Authority, New DelhiDEPUTY DIRECTOR (H. E. D. 1)

( Alternate )SHRI S. R. DORAISWAMY Army Headquarters, Ministry of Defence

SHRI VIDYA BHUSHAN ( Alternate )SHRI G. L. DUA Rural Electrification Corporation Ltd, New Delhi

SHRI S. K. SETHI ( Alternate )SHRI M. GANESH Kirloskar Electric Co Ltd, Bangalore

SHRI N. A. JANARDAN RAO ( Alternate I )

SHRI K. V. MANJUNATH ( Alternate II )

SHRI A. GANGULI Steel Authority of India Ltd (Bhilai Steel Plant),New Delhi

SHRI K. NARAYANAN ( Alternate )JOINT DIRECTOR STANDARDS

(ELECT)-TMLRailway Board, Ministry of Railways

ASSISTANT DIRECTOR (ELECT) ( Alternate )

( Continued on page 2 )


IS : 2223 1983

2

( Continued from page 1 )

( Continued on page 20 )

Members RepresentingSHRI A. P. LAD Walchandnagar Industries Ltd, Walchandnagar

SHRI A. G. DOSHI ( Alternate )SHRI Y. C. LUMBA The General Electric Co of India Ltd, Calcutta

SHRI P. MAJUMDAR ( Alternate )SHRI P. MUKHOPADHYAY National Test House, Calcutta

SHRI SANATH KUMAR ( Alternate )SHRI J. M. NAIK Millowners Association, Bombay

SHRI S. SARUP ( Alternate )SHRI SHIV NARAYAN Bharat Heavy Electricals Ltd, Hyderabad

SHRI S. C. MUKHOPADHYAY ( Alternate I )

SHRI S. S. RAO ( Alternate II)SHRI J. S. NEGI Jyoti Ltd, Vadodara

SHRI P. L. PRADHAN ( Alternate )DR M. S. PADBIDRI Hindustan Brown Boveri Ltd, Vadodara

SHRI N. SUNDARARAJAN ( Alternate )SHRI V. RAMASWAMY Siemens India Ltd, Bombay

SHRI S. N. GHOSH ( Alternate )SHRI RAMESH CHANDRA Delhi Electric Supply Undertaking, New Delhi

SHRI SATCHIDANAND ( Alternate )SHRI A. D. RANGNEKAR Tata Consulting Engineers, Bombay

SHRI M. E. REDDY ( Alternate )LT-COL A. K. SRIVASTAVA Directorate of Standardization, Ministry of

Defence (DGI)MAJ K. S. SETHI ( Alternate )

SHRI A. N. SRIVATHSA NGEF Ltd, BangaloreSHRI S. L. SRIDHARA MURTHY

( Alternate )SHRI R. K. TASKAR Crompton Greaves Ltd, Bombay

SHRI D. P. PATEL ( Alternate )SHRI J. M. UDIA Directorate General of Technical Development,

New DelhiSHRI J. S. ZAVERI Bharat Bijlee Ltd, Bombay

SHRI S. G. DESHMUKH ( Alternate )SHRI S. P. SACHDEV, Director General, ISI ( Ex-officio Member )

Director ( Elec tech )

SecretarySHRI R. K. MONGA

Senior Deputy Director (Elec tech), ISI


IS : 2223 1983

3


AC INDUCTION MOTORS

( Second Revision )

0. F O R E W O R D

0.1 This Indian Standard (Second Revision) was adopted by the IndianStandards Institution on 20 October 1983, after the draft finalized bythe Rotating Machinery Sectional Committee had been approved bythe Elcctrotechnical Division Council.

0.2 This standard was first issued in 1962 and covered the mountingflanges for frame sizes from 90 to 280 specified in IS : 1231-1962. Itwas revised in 1971 to include mounting flanges for motors equivalentto those having shaft-heights from 56 to 315 mm covered in theIS : 1231-1967*. These dimensions had been adopted from theinternational publications of the IEC. In the first revision the majormodifications carried out related to:

a) shaft runouts, concentricity and perpendicularity of flanges, and

b) standardization of three types of flanges covering a wide range ofapplications.

In this second revision, B-type flanges of large size frame numbersabove 315 mm ( see 1231-1971* and IS : 8223-1976 ) have beenincluded ( see Tables 2 and 3 ). The provision of tapped holes for B-typeflanges has been made in Table 2. C-type flanges have now beenrecommended up to 132 frame number of IS : 1231-1974*.

0.3 The flanges specified in this standard may also be used onfoot-mounted motors in which case requirements of IS : 1231-1974*,IS : 8223-1976 and IS : 996-1979, governing the dimensions offoot-mounted motors shall apply.

0.4 D-type flanges are not recommended for motors below framenumber 132 of IS : 1231-1974*.

*Dimensions of three-phase foot-mounted induction motors.Dimensions and output ratings for foot-mounted electrical machines with frame

numbers 355 to 1 000.Specification for single-phase small ac and universal electric motors ( second revision ).


IS : 2223 1983

4

0.5 The designation and dimensions of flanges for vertical shaft motorsfor pumps are covered separately in IS : 2254-1965*.

0.6 The general requirements of ac induction motors which may haveflange mountings are covered separately in the following standards:

0.7 In the preparation of this standard, assistance has been derivedfrom ICE Publication 72 (1971) Dimensions and output ratings forrotating electrical machines Frame numbers 58 to 400 and flangeFF 55 to FF 1 000 and FT 55 to FT 1 080: Part 2 Dimensions ofmounting flanges issued by the International ElectrotechnicalCommission (IEC).0.8 This edition 3.2 incorporates Amendment No. 1 (January 1990)and Amendment No. 2 (January 1993). Side bar indicates modificationof the text as the result of incorporation of the amendments.0.9 For the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test, shall be rounded off in accordance withIS : 2-1960. The number of significant places retained in the roundedoff value should be the same as that of the specified value in thisstandard.

1. SCOPE

1.1 This standard covers the dimensional requirements for flangemounted motors having enclosures given in IS : 4691-1968 and shaftheights 56 mm to 315 mm specified in IS : 996-1979 and IS : 1231-1974|| with their shaft either in horizontal or vertical position.

*Dimensions of vertical shaft motors for pumps ( revised ).

IS : 325-1978 Specification for three-phase induction motors( fourth revision )

IS : 996-1979 Specification for single-phase small ac and universalelectric motors ( second revision )

IS : 6381-1972 Specification for construction and testing ofelectrical apparatus with type of protection e

IS : 7538-1975 Specification for three-phase squirrel cage inductormotors for centrifugal pumps for agricultureapplication

IS : 8289-1976 Specification for electrical equipment with type ofprotection n

Rules for rounding off numerical values ( revised ).Degrees of protection provided by enclosure for rotating electrical machinery.Specification for single-phase small ac and universal electric motors ( second revision ).||Dimensions of three phase foot-mounted induction motors ( third revision ).


IS : 2223 1983

5

1.2 This standard also covers dimensions of large flanges of motorswith flange numbers between 355 and 1 080 given in IS : 8223-1976*with their shaft either in horizontal or vertical position.

2. LETTER SYMBOLS2.1 For the purpose of this standard, the following letter symbols shallapply ( see Fig. 1, 2, 3 and 4 ).

*Dimensions and output ratings for foot-mounted electrical machines with framenumbers 355 to 1 000.

AC diameter of motorAD distance from the axial centre line of the motor to extreme

outside part of terminal box or other most salient objectmounted on the side of motor

D diameter of shaft extensionDA diameter of second shaft extension

E length of shaft extension from the shoulderEA length of the second shaft extension from the shoulder

e shaft runoutf concentricity of mounting spigotg perpendicularity of the mounting spigotF width of keyway

FA width of keyway of second shaftG distance from the bottom of the keyway to the opposite

surface of the shaft extensionGA distance from top of the key to the opposite surface of the

shaft extensionGB distance from bottom of the keyway to the opposite surface of

the second shaft extensionGC distance from the top of the key to the opposite surface of

second shaft extensionGD thickness of keyGE depth of keyway at the crown of the shaftGF thickness of the key of the second shaft extensionGH depth of the keyway of the crown of second shaft extension

L overall length of motor with single shaft extensionLA thickness of flangeLB distance from mounting surface of flange to the end of motorLC overall length of motor when there is a second shaft

extension


IS : 2223 1983

6

NOTE Symbols are standardized to facilitate reference when ordering motors tothis standard. The ringed symbols in Fig. 1 to 4 refer to dimensions which arespecified in this standard.

3. DESIGNATION OF FLANGE MOUNTED MOTORS

3.1 Three types of mounting flanges are recognised in Table 1 whichare designated as type B, C and D type.

3.2 The flange numbers in Tables 2 to 5 correspond to the pitch circlediameter of the fixing holes in millimetres. The letter F is added toindicate that the motor is flange-mounted. Example: F115B.

3.3 Motors manufactured in accordance with Tables 2 to 5 should carrya mark on the rating plate which includes the frame number and theflange number taken from these tables. Example: 132-F400D.

4. STANDARD FRAME SIZES, DIMENSIONS AND OUTPUT RATINGS

4.1 The fixing dimensions for the different flange numbers covered bythis standard shall be as follows:

a) Table 2 and Table 3 for B-type flanges ( see Fig. 1 and 4 ).b) Table 4 for C-type flanges ( see Fig. 2 and 4 ).c) Table 5 for D-type flanges ( see Fig. 3 and 4 ).

4.2 Shaft extension dimensions and their association with ratedoutputs for different class of insulations shall be in accordance withIS : 996-1979* and IS : 1231-1974.

LD gap for fixing holes in the flangeM pitch circle diameter of the fixing holes

N1 diameter of the mounting spigotN2 diameter of the mounting rabbet

NOTE a) Spigot portion refers to the male part of the flange fitting.b) Rabbet portion refers to the female part of the flange fitting.

P outside diameter of the flange or in the case of a non-circularoutline, the maximum diametral dimension

R distance from mounting surface of flange to the shoulder onshaft

S diameter of clearances (fixing) holes in mounting flange ornominal diameter of thread

T depth of spigot

*Specification for single-phase small ac and universal electric motors ( second revision ).Dimensions of three-phase foot-mounted induction motors ( third revision ).


IS : 2223 1983

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4.3 The accuracies of shaft extension runout, concentricity of mountingspigot and perpendicularity of mounting face to shaft shall be inaccordance with 7. The methods of determination of these accuraciesshall as specified in 8.

TABLE 1 DESIGNATION OF TYPES OF FLANGES( Clause 3.1 )

SL NO.

DESIGNATION OF FLANGE

SYMBOL ILLUSTRATION

(1) (2) (3) (4)

i) Flange mounted motor withmounting flange near drive-endbearing

B

ii) Face mounted motor withmounting face on drive-end andshield

C

iii) Flange mounted motor withmounting flange near drive-endof frame

D

NOTE 1 All motors shall have free shaft extension.

NOTE 2 The illustrations given above show the motors having their shafts inhorizontal position. However, the same flange designation shall apply to motorshaving their shaft in vertical position.


IS : 2223 1983

8

FIG. 1 MOTORS WITH B-TYPE FLANGE

FIG. 2 MOTORS WITH C-TYPE FLANGE


IS : 2223 1983

9

FIG. 3 MOTORS WITH D-TYPE FLANGE

FIG. 4 SHAFT EXTENSION DETAILS


IS : 2223 1983

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5. POSITION OF TERMINAL BOX5.1 When flange mounted motors also have feet, the location of theterminal box shall be as specified in IS : 996-1979* and IS : 1231-1974.5.2 The terminal box on flange mounted motors without feet shall beon the right hand side, when viewed from shaft, with fixing holesposition at 45 (22.5 for 8 holes) with respect to vertical plans.5.2.1 Unless otherwise specified, tolerance on the angle ( see Fig. 5 )45 for 4 holes, 22.5 for 8 holes and 15 for 12 hole flange shall be 0.5.

6. POSITION OF FIXING HOLES ON FLANGE IN RELATION TO EYE BOLT OR FEET6.1 When, flange mounted motors also have feet the position of theholes in a four-hole flange should have an angle of 45 with respect tothe plane which passes through the shaft and is perpendicular to themounting plane of the feet ( see Fig. 5 ). For the eight and twelve holeflange, the corresponding angle should be 22.5 and 15, respectively.

7. ACCURACIES OF SHAFT EXTENSION RUNOUT ( e ), CONCENTRICITY OF SPIGOT ( f ) AND PERPENDICULARITY OF MOUNTING FACE TO SHAFT ( g )7.0 Two classes of accuracies are specified namely, Normal andPrecision. Unless otherwise specified, only normal accuracies shall beapplied.7.1 Shaft Extension Runout The tolerance on shaft extensionrunout shall be as given in Table 6.7.2 Concentricity of Spigot Diameter and Perpendicularity ofMounting Face of Flange to Shaft Concentricity of mountingrabbet (spigot) diameter and tolerances of perpendicularity ofsupporting face of flange in relation to the shaft of the motor shall beas given in Table 7.

*Specification for single-phase small ac and universal electric motors ( second revision ).Dimensions of three-phase foot-mounted induction motors ( third revision ).

FIG. 5 POSITION OF HOLES IN FOUR-HOLE FLANGE


TABLE 2 FRAME NUMBER AND DIMENSION OF MOTORS WITH B-TYPE FLANGE( Clauses 3.2, 3.3, 4.1; Figs. 1 and 4 )

FLANGE NUMBER

FRAME NUMBER* M N P R NUMBER OF

HOLES

S TMax

LA LDMin

Degree of Prot-ection IP 44 orSuperior Methodof Cooling IC 41

Degree of Protec-tion IP 21, IP 22and IP 23 andMethod ofCooling IC 01

Nomi- nal

Tole- rance

Nomi- nal

Tolerance Nomi- nal

Free Holes Tolerance

Tapped Holes

Thread

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19)

mm mm mm m m mm mm mm m m mm mm mm

F 115 BF 130 BF 165 BF 215 BF 265 BF 300 BF 350 BF 400 BF 500 BF 600 BF 740 BF 940 B

56 and 6371

80 and 90100 and 112

132160 and 180

200225

250 and 280315355

400 and 450

56 and 6371

80 and 90100 and 112

132

160 and 180200225

250 and 280315400

115130165215265300350400500600740940

0.3 0.3 0.3 0.3 0.3 0.5 0.5 0.5 0.5 1.0 1.0 1.0

95110130180230250300350450550680880

j6j6j6j6j6j6j6j6j6js6js6js6

+ 13+ 13+ 14+ 14+ 16+ 16+ 16+ 18+ 20+ 22+ 25+ 28

9 9 11 11 13 13 16 18 20 22 25 28

140160200250300350400450550660800

1 000

000000000000

444444488888

101012151519191919242428

+ 360+ 360+ 430+ 430+ 430+ 520+ 520+ 520+ 520+ 520+ 520+ 520

000000000000

M8M8M10M12M12M16M16M16M20M24M24M24

33.53.5445555666

99

10111213151618222525

161620242432323232404040

NOTE The dimension LA refers to the flange thickness at the place where the stud is fixed. In other places, the flange thickness can be selected depending upon the materialused. This dimension is given for guidance.

*Frame number same as in IS : 996-1979 Specification for single-phase small ac and universal electric motors ( second revision )and IS : 1231-1974 Dimensions of three-phasefoot-mounted induction motors ( third revision ).


As in the Original Standard, this Page is Intentionally Left Blank


IS : 2223 1983

13

TABLE 3 DIMENSIONS OF B-TYPE FLANGE FOR LARGE FRAME NUMBER MOTORS*

( Clauses 3.2, 3.3, and 4.1 and Fig. 1 and 4 )

FLANGE NUMBER

DIMENSIONS

M N P S T LA

Drilled hole size

No.

(1) (2) (3) (4) (5) (6) (7) (8)

mm mm mm mm mm mm

F 1 080 BF 1 180 BF 1 250 B F 1 320 BF 1 400 B F 1 500 BF 1 700 BF 1 900 BF 2 000 B F 2 120 BF 2 360 B

1 0801 1801 2501 3201 4001 5001 7001 9002 0002 1202 360

see Note 1

1 1501 2501 3201 4001 4801 6001 8002 0002 1202 2402 250

2828282828282835383535

88 or 1688 or 168

12 or 2412 or 2412 or 241212 or 2416 or 32

see Note 1

see Note 2

NOTE 1 The dimensions N and T in Table 3 are not specified because these are notnormally required for large machines. Special requirements, if any, may be agreedbetween the manufacturer and the user.

NOTE 2 The thickness of flange LA in Table 3, may be selected suitably dependingon the type of construction.

*The details in this table are applicable to flange mounted motors of VI design withshaft downward.

These flange numbers have been retained for the purpose of continuity and are notpreferred.


TABLE 4 FRAME NUMBER AND DIMENSIONS OF MOTORS WITH SMALLER C-TYPE FLANGES

( Clauses 3.2, 3.3, and 4.1, and Figs. 2 and 4 )

FLANGE NUMBER

FRAME* NUMBER

M N P S DEPTH OF

TAPPED HOLE

TMax

Size Tolerance Size Tolerance Threaded size

No.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11)mm mm mm mm mm mm

F 65 CF 75 CF 85 CF 100 CF 115 CF 130 CF 130 CF 165 C

5663718090

100112132

657585

100115130130165

0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3

5060708095

110110200

j6j6j6j6j6j6j6j6

8090

105120140160160160

M5M5M6M6M8M8M8M12

44444444

6688

10101012

2.52.52.53.03.03.53.53.5

*Frame numbers same as in IS : 996-1979 Specification for single-phase small ac and universal electric motors( second revision ) and IS : 1231-1974 Dimensions of three-phase foot-mounted induction motors ( third revision ).


TABLE 5 FRAME NUMBER AND DIMENSIONS OF MOTORS WITH D-TYPE FLANGE

( Clauses 3.2, 3.3, 4.2 and Figs. 3 and 4 )

FLANGE NUMBER

FRAME* NUMBER

M N P R S DIA TMax

LA

Size Tolerance Size Tolerance Drilled Size

No.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12)mm mm mm mm mm mm mm mm

F 400 D

F 400 D

F 500 D

F 500 D

F 600 DF 600 D

F 740 D

F 740 D

132

160

180

200

225250

280

315

400

400

500

500

600600

740

740

0.5

0.5

0.5

0.5

1.0 1.0

1.0

1.0

350

350

450

450

550550

680

680

j6

j6

j6

j6

js6

js6js6

js6

450

450

550

550

660

660800

800

71

90

103

115

127

146168

194

1919

19

19

24

2424

24

88

8

8

8

88

8

55

5

5

6

66

6

2020

20

20

24

2424

24

*Frame numbers same as in IS : 1231-1974 Dimensions of three-phase foot-mounted induction motors ( third revision ).


IS : 2223 1983

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TABLE 6 ACCURACIES OF SHAFT EXTENSION RUNOUT (e)( Clauses 4.3, 7.1, 8.1; and Fig. 7 and Fig 9 )

DIAMETER OF SHAFT EXTENSION

SHAFT EXTENSION RUNOUT ( e )

Normal Class Precision Class

(1) (2) (3)mm m m

Up to and including 10 30 15OverOverOverOverOverOverOver

10 up to and including18 up to and including30 up to and including50 up to and including80 up to and including

120 up to and including140 up to and including

18305080

120140160

35405060708090

18212530354050

NOTE For downward shaft mounting machines and having larger shaft diametresthe values of accuracy of shaft extension runout are recommended in Fig. 9.

TABLE 7 ACCURACIES OF CONCENTRICITY (f) AND PERPENDICULARITY (g)

( Clauses 4.3, 7.2, 8.2, 8.3 and Fig. 7, 8 and 9 )FLANGE NUMBER

SPIGOT DIA N1

MAXIMUM PERMISSIBLE CHANGE IN INDICATOR

READING CONCENTRICITY ( f )

OUTSIDE DIA, P

PERPENDICULARITY ( g )

Normal Class

Precision Class

Normal Class

Precision Class

(1) (2) (3) (4) (5) (6) (7)mm m m mm mm m

FFFFFFF

657585

100115130165

5060708095

110130

8080808080

100100

40404040405050

8090

105120140160200

8080808080

100100

40404040405050

FFFFFFFFFF

215265300350400500600740940

1 080

180230250300350450550680880

1 000

100100125125125125160160200200

5050636363638080

100100

250300350400450550660800

1 0001 150

100100125125125125160160200200

5050636363638080

100100

NOTE The values of concentricity ( f ) and perpendicularity ( g ) are also illustratedin Fig. 9. In the case of large flanges these accuracies may be calculated byextrapolation from Fig. 9.


IS : 2223 1983

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8. METHODS OF MEASUREMENT

8.1 Shaft Extension Runout To measure the shaft extensionrunout with rotation of shaft, apply the point of the indicator on theshaft midway along its length as shown in Fig. 6. Read the maximumand minimum values on the indicator through one slow revolution ofthe shaft, the difference between the readings ( e ) shall not exceed thepermissible tolerances given in Table 6.

8.2 Concentricity of Mounting Rabbet (Spigot) and Shaft Tomeasure the concentricity of spigot and shaft, fix the indicator rigidlyon the shaft extension by means of a device similar to that in Fig. 7 ata distance of about 10 mm from the mounting face of the flange. Readthe maximum and minimum values through one slow revolution of theshaft. The difference between the extreme readings of the test indicatorshall not exceed the values for concentricity ( f ) given in Table 7.

FIG. 6 MEASUREMENT OF SHAFT EXTENSION RUN-OUT ( e )

FIG. 7 MEASUREMENT OF CONCENTRICITY OF MOUNTING RABBET (SPIGOT) AND SHAFT ( f )


IS : 2223 1983

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8.2.1 In the case of large machines with tilting pad type or bush typejournal bearings the method of measuring spigot runout and facerunout shall be agreed between the manufacturer and the user.

8.2.2 It is recommended that test in 8.2 be carried out on the machinesset up with shaft vertical so as to make the measurements free fromeffects of gravity.

8.3 Perpendicularity of Mounting Face of Flange to Shaft Fixthe indicators rigidly on the shaft extension by means of a devicesimilar to that shown in Fig. 8 at a distance of about 10 mm from themounting face of the flange. Read the maximum and minimum valuesthrough one slow revolution of the shaft. The difference between theextreme readings of the perpendicularity indicator shall not exceed thevalues ( g ) given in Table 7.

8.3.1 It is recommended that the test should be carried out on motorset with shaft vertical so as to eliminate axial clearance in bearing.

FIG. 8 MEASUREMENT OF PERPENDICULARITY OF MOUNTING FACE OF FLANGE AND SHAFT ( g )


FIG. 9 ACCURACIES OF SHAFT AND MOUNTING FACE


IS : 2223 1983

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( Continued from page 2 )

Industrial Motors Subcommittee, ETDC 15 : 1Convener Representing

SHRI S. N. GHOSH Siemens India Ltd, Bombay

MembersSHRI V. RAMASWAMY ( Alternate to

Shri S. N. Ghosh )SHRI R. K. AGGARWAL Bharat Heavy Electricals Ltd, Hyderabad

SHRI D. BASU ( Alternate I )SHRI P. V. SATHE ( Alternate II )

SHRI J. C. CHHABRA Directorate General of Supplies & Disposals,New Delhi

DEPUTY DIRECTOR OF INSPECTION ( Alternate )

SHRI S. G. DESHMUKH Bharat Bijlee, Ltd, BombaySHRI S. P. DEGHE ( Alternate )

SHRI G. DORAIRAJ The Coimbatore District Small Scale IndustriesAssociation, Coimbatore

SHRI C. P. DUSAD Crompton Greaves Ltd, BombaySHRI A. V. WAGLE ( Alternate )

SHRI M. GANESH Kirloskar Electric Co Ltd, BangaloreSHRI M. R. PURANDARE ( Alternate )

SHRI A. K. GHOSH Steel Authority of India Ltd (Rourkela Steel Plant),New Delhi

SHRI N. SUBRAMANIAN ( Alternate )SHRI H. G. KAMATH Voltas Ltd, BombaySHRI M. L. KOTHARI Indian Jute Mills Association, CalcuttaSHRI A. P. LAD Walchandnagar Industries Ltd, Walchandnagar

SHRI S. S. KULKARNI ( Alternate )SHRI Y. C. LUMBA The General Electric Co of India Ltd, Calcutta

SHRI P. MAZUMDAR ( Alternate )SHRI K. S. MINHAS Indian Machine Tool Manufacturers Association,

BombaySHRI B. MUKHOPADHYAY National Test House, Calcutta

SHRI D. N. UPADHYAYA ( Alternate )SHRI J. M. NAIK Millowners Association, BombaySHRI V. K. D. PAI All India Electric Motor Manufacturers Association,

BombaySHRI KIRAN N. SHAH ( Alternate )

DR M. S. PADBIDRI Hindustan Brown Boveri Ltd, VadodaraSHRI N. SUNDARA RAJAN ( Alternate )

DR G. M. PHADKE Indian Electrical Manufacturers Association, BombaySHRI J. R. MAHAJAN ( Alternate )

SHRI P. L. PRADHAN Jyoti Ltd, VadodaraSHRI A. B. CHOUDHARI ( Alternate )

SHRI M. RANGASHAI Hindustan Machine Tools Ltd, BangaloreSHRI NIRMALA NAIK ( Alternate )

SHRI A. N. SRIVATHSA NGEF Ltd, BangaloreSHRI S. A. WAJID ( Alternate )

SHRI T. SOMASUNDARAM Directorate of Industries & Commerce, Governmentof Tamil Nadu, Madras

SHRI M. RAJAGOPALAN ( Alternate )


Bureau of Indian StandardsBIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification ofgoods and attending to connected matters in the country.

CopyrightBIS has the copyright of all its publications. No part of these publications may be reproduced in anyform without the prior permission in writing of BIS. This does not preclude the free use, in the courseof implementing the standard, of necessary details, such as symbols and sizes, type or gradedesignations. Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian StandardsAmendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicatesthat no changes are needed; if the review indicates that changes are needed, it is taken up forrevision. Users of Indian Standards should ascertain that they are in possession of the latestamendments or edition by referring to the latest issue of BIS Catalogue and Standards : MonthlyAdditions.This Indian Standard has been developed by Technical Committee : ETDC 15

Amendments Issued Since Publication

Amend No. Date of IssueAmd. No. 1 January 1990Amd. No. 2 January 1993

BUREAU OF INDIAN STANDARDSHeadquarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002.Telephones: 323 01 31, 323 33 75, 323 94 02

Telegrams: Manaksanstha(Common to all offices)

Regional Offices: Telephone

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Eastern : 1/14 C. I. T. Scheme VII M, V. I. P. Road, KankurgachiKOLKATA 700054

337 84 99, 337 85 61337 86 26, 337 91 20

Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022 60 38 4360 20 25

Southern : C. I. T. Campus, IV Cross Road, CHENNAI 600113 235 02 16, 235 04 42235 15 19, 235 23 15

Western : Manakalaya, E9 MIDC, Marol, Andheri (East)MUMBAI 400093

832 92 95, 832 78 58832 78 91, 832 78 92

Branches : AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE.FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW.NAGPUR. NALAGARH. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM.VISHAKHAPATNAM


dimensions of flange mounted ac induction motors

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