Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 12032-2 (1987): Graphical symbols for diagrams in thefield of electrotechnology, Part 2: Symbols elements,qualifying symbols and other symbols having generalapplication [ETD 1: Basic Electrotechnical Standards]

I-\

I : \_’

IS: 12032 ( Part 2 ) - 1987

IEC Pub 617-2 ( 1983 )

Indian Standard

GRAPHICAL SYMBOLS FOR DIAGRAMS IN THE FIELD OF

ELECTROTECHNOLOGY PART 2 SYMBOL ELEMENTS, QUALIFYING SYMBOLS AND OTHER SYMBOLS

HAVING GENERAL APPLICATION

_.-_ [ JEC Title : Graphical Symbols for Diagrams - Part 2 : Symbol Elements, Qualifying Symbols and Other Symbols Having General Application ]

UDC 621-3-061 : 003.62

@ Copyright 1988

/ *-\ I BUREAU OF INDIAN STANDARDS

\ / -4 MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr 9 JVovcmber 1988

IS : 12032 ( Part 2 ) - 1987 UDC 621.3461 : 003.62 IEC Pub 617-2 ( 1983 )

Indian Standard

GRAPHICAL SYMBOLS FOR DIAGRAMS IN THE FIELD OF ELECTROTECHNOLOGY

PART 2 SYMBOL ELEMENTS, QUALIFYING SYMBOLS AND OTHER SYMBOLS

HAVING GENERAL APPLICATION

( IEC Title : Graphical Symbols for Diagrams - Part 2 : Symbol Elements, Qualifying Symbols and Other Symbols Having General Application )

National Foreword

This Indian Standard ( Part 2 ) which is identical with IEC Pub 617-2 ( 1983 ) ‘Graphical ;ymbols for diagrams - Part 2 : Symbol elements, qualifying symbols and other symbols having zenera application’, issued by the International Electrotechnical Commission ( IEC ), was adopted 3y the Bureau of Indian Standards on the recommendation of the Basic Electrotechnical Standards Sectional Committee and approval of the Electrotechnical Division Council.

Cross Reference

International Standard Corresponding Indian Standard

IEC Pub 445( 1973 ) Identification of apparatus IS : 11353-1986 Guide for uniform system terminals and general rules for a uniform of marking and identification of con- system of terminal marking, using an alpha- ductors and apparatus terminals riumeric notation

IS0 128-1982 Technical drawings - General principles of presentation

IS : 10714-1983 General principles of presentation on technical drawings ( Technically equivalent )

IEC Pub 27 Letter symbols to be used in electri- cal technology

IEC Pub 375( 1972 ) Conventions concerning electric and magnetic circuits

IEC Pub 617-6( 1983 ) Graphical symbols for diagrams - Part 6 Production and conver- sion of electrical euergy

IS : 3722 Letter symbols and signs used in electrical technology ( in 2 Parts )

IS : 9499- 1980 Conventions concerning electric and magnetic circuits

IS : 12032 ( Part 6 )-1987 Graphical sym- bols for diagrams in the field of electro- technology: Part 6 Production and conversion of electrical energy

The Basic Electrotechnical Standards Sect&al Committee has reviewed the provisions of the bllowing IEC -Publications and has decided that they are acceptable for use in conjunction with his standard:

IEC Pub 364-3 ( 1977 ) Electrical Installations of buildings; Part 3 Assessment of general characteristics

IEC Pub 617-10 ( 1983 ) Graphical syrnbols for diagrams; Part 10 Telecommunications: Transmission

IEC Pub 617-12 ( 1983 ) Graphical symbols for diagrams; Part 12 Binary logic elements

IEC Pub 617-13 ( 1978 ) Graphical symbols for diagrams; Part 13 Analogue elements

Adopted 18 June 1987 Q November 1988, BIS I

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr 9

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

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

CHAPTER I: SYMBOL ELEMENTS

SECTION I- OfJTLINES AND ENCLOSURES

No.

02-01-01 Form 1

Symbol

cl

Item Equipment Functional unit

Description

Note. - Suitable symbols or legends shall be inserted in 02-Ol-cr2

Form 2

I

or added to the symbol outline to indicate the item, equipment or function.

02-01-03 Form 3 0

02-01-04 Envelope (tank) Form 1 0 Enclosure

Notes 1. - An outline of another shape may be used.

02-01-05 Form 2

2. - If the enclosure has special protective fea- tures attention may be drawn to these by a note.

3. - The use of the envelope symbol is optional. It may be omitted if no confusion will arise. The envelope must be shown if there is a connection to it. If necessary the envelope may be split.

02-01-06 Boundary line

Notes I. - Used to indicate items associated physically, mechanically or functionally.

2. - Any combination of short and long strokes may be used.

02-01-07 r -----

1 Screen (shield) Note. -The screen may be drawn in any convenient

I I shape.

I I

,

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

CHAPTER II: QUALIFYING SYMBOLS

SECTION 2 - KIND OF CURRENT AND VOLTAGE

'L 50 Hz

'L 100...600 kHz

3N'L 50Hz 400/23QV

NO. Symbol -

Description

Form 1 Direct current

Notes I. - The voltage may be indicated at the right of the symbol and the type of system at the left.

02-02-02 2M- 220/11ov Example:

Direct current, three conductors including mid-wire, 220 V (110 V between each outer conductor and mid- wire)

2M may be replaced by 2 + M

02-02-03 Form 2 2. - Symbol 02-02-03 is to be used if symbol 02-02-01 causes confusion.

-

02-02-04 Alternating current

Notes I. - The numerical value of the frequency or the trequency range may be added at the right- hand side of the symbol.

02-02-0s Exampies:

Alternating current of SO Hz

02-02-06 Alternating current frequency range 100 kHz to 600 kHz

2. - The voltage may also be indicated to the right of the symbol.

3. - The number of phases and the presence of a neutral may be indicated at the left-hand side of the symbol.

02-02-07 Example.

A1ternatir.g current: thre< phase ‘r\:tn ~rcuriai, 50 Hr, 400 V (230 V between phase and neutral). 3N may be replaced by ? + N

4. - If It is necessary to indicate a system m ac- cordance with the designations established in IEC Publication 364-3: Electrical Installa- tions of Buildings, Part 3: Assessment of General Characteristics, the corresponding designation should be added to the symbol.

02-02-08 Example:

Alternating current, three-phase, 50 Hz; system having one point directly earthed and separate neutral and pro- tective conductqrs throughout

R

4

IS :. 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

No. ’

02-02-09

M-02-10

02-M-11

Symbol Description

Alternating current, different frequency ranges

The following symbols may be used when it is necessary

on a given drawing to distinguish between the different

frequency ranges

Relatively low frequencies (example: power frequencies

or sub-audio frequencies)

Medium frequencies (example: audio)

Relatively high frequencies (example: super audio,

carrier and radio frequencies)

02-02-12 Rectified current with alternating component (if it is

necessary to distinguish from a steady-direct current)

02-02-13

02-02-14

02-02-15

+

N

Positive polarity

Negative polarity

--

Neutral

Note. - This symbol for neutral is given in I EC Publica-

tion 445: Identification of Apparatus Terminals

and General Rules for a Uniform System of

Terminal Marking, Using an Alphanumeric

Notation.

02-02-16 M Mid-wire

No/e. - This symbol for mid-wire is given in I EC Publi-

catton 445.

5

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 3 - VARIABILITY

3.1 Variability is non-inherent when the variable quantity is controlled by an external device, for example, when the resistance is controlled by a regulator.

3.2 Variability is inherent when the variable quantity depends on qualities of the device itself, for example, when the resistance changes with change of voltage or with change of temperature.

3.3 The sign for variability should be drawn across the main symbol at about 45” to the centre line of the symbol.

_

No.

02-03-01

Symbol Description

Variability, non-inherent

02-03-02 Variability. non-Inherent,

non-linear

02-03-03

/

_.-_.

I - ____

Variability, inherent

Nore. - Information on the controlling quantity, for

example voltage or temperature, may he shown

near the symbol.

02-03-04 Variability, inherent, non-linear

The note with symbol 02-03-03 applies.

02-03-05

02-03-M

Pre-set adjustment permitted only at zero current

6

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

NO

02-03-07

02-oi-ox

_._-_

02-03-09

02-03-10

02-w I 1

02-0.1. I2

Symbol

/

/‘ /

J

Description

Variability in steps Stepping action

Note. - A figure indicating the number of steps may be added.

Example:

Variability, non-inherent in five steps

Continuous variability

Example:

Preset adjustment, continuously variable

Automatic (inherent) control

Note. -The controlled quantity may be indicated adjacent to the symbol.

Example:

Amplifier with automatic gain control

7

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 4 - DIRECTION OF FORCE OK MOTION

4.1 An arrow may be used to indicate the direction in which the movable

part of ;I symbol must move to give a required effect (see the example of

symbol 02-04-02).

It may also indicate the direction of a force or the direction of motion

of the physical part symbolized. In such cases a note to indicate the view

point may be required.

4.2 The effect caused by movement may be explained by symbols or by

a text.

No. Symbol Dc\crlption

02-04-01 * Kcct~l~near force or motion III the direction of the arrow

02-04-02 4 W Bidlrccticlnal rectilinear force or motion

E.rurn/,lc

Frequency is incrcascd when wiper 3 is moved towards terminal ?

02-04-03

02-04-04

_

02-04-05

07-04-06

Frequency

decreases t) increases

7-S

4-L ~-

Unidirecuonal rotation in the dnection of the arrow. for example clockwise /

Bidirectional rotation

Bidirectional rotation, limited in both dlrections

_~~~_~~_____.

Reciprocating moticn

I§ : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 5 - DIRECTION OF FLOW

___.

No.

02-05-01

Symbol

\ /

Description

Propagation. energy flow, sgnal flow, one way

02-05-02 \ / H \ Propagation, both ways, simultaneously Simultaneous transmission and reception

02-05-03 /. . / Propagation, both ways, not simultaneously Alternate transmission and reception

02-05-04 / _ \ Transmission

Note. - The dot may be omitted if the sense is unam- biguously given by the arrowhead in combina- tion with the symbol to which it is applied. For example see symbol 10-06-04.

02-05-0s \ _ 7 - Reception

Note. - The dot may be omitted if the sense is unam- biguously given by the arrowhead in combina- tion with the symbol to which it is applied. For example see symbol 10-06-03.

02-05-06 t : Energy flow from the busbars

02-05-07 t : Energy flow towards the busbars

02-05-08 I :: Bidirectional energy flow

9

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 6 - OPERATIONAL DEPENDENCE

CHARACf’ERISTIC QUANTITY ON A

a24ba2 <

Description -

Operating when the characteristic quantity is higher

than the setting value

Operating when the characteristic quantity is lower than

the setting value

Operating when the characteristic quantity is either

higher than a given high setting ot lower than a given

low setting

Operating when value of the characteristic quantity

becomes zero

____- -__-

Operating when the value of the characteristic quantity

differs from zero by an amount which is very small com-

pared with the normal value

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 7 - TYPES OF MATERIAL

7.1 The type of material may be indicated either by using its chemical sym- bol, or by one of the qualifying symbols given below. These symbols have been drawn in rectangles, but the rectangle may be omitted when they are used in conjunction with another symbol. If necessary, use may be made of the symbols for materials given in IS0 128: Engineering drawing - Principles of presentation. ~_~__.___~_ --

No. SYtllbOi

p :A Description

___ --~-

02-07-01 Material, unspecified

-___.

02-07 -02 Material, solid

.--__ _-_-.-- ------

02-07-03 I--1

Material, liquid

_~____._..

M-M-04 P

Material, gas

-__ ___.-__I~ -.

m-07-05 LZCI

Material, electret

-._._-I--~- --

02-07-06 I

Material, semicondticting

___ ____ ____-____-P-

02-07-07 Material. insulating

_~-

II

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 8 - EFFECT OR DEPENDENCE

No.

02-u&01

Symbol

FJ

Thermal effect

Description

--

02-0a-02

>

Electromagnetic effect

02-08-03

02-08-04

02-08-05

z Magnetostrictive effect

_

X Magnetic field effect or dependence

I i Delay

-~- ..--- _i

‘

12

No.

m-09-01

02-09-02

--Y--

02-W-03

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 9 - RADIATION

9.1 Arrows pointing towards a symbol denote that the device symbolized will respond to incident radiation of the indicated type.

9.2 Arrows pointing away from a symbol denote the etiission of the indi- cated type of radiation by the device symbolized.

9.3 Arrows located within a symbol denote a self-contained radiation source.

Symbol Description

Radiation, non-ionizing, electromagnetic (for example radio waves or visible light)

Coherent radiation, non-ionizing (for example cohere& light)

Radiation, ionizing

Note. - If it is necessary to show the specific type of ionizing radiation, the symbol may be aug- mented by the addition of s\mhols or letters such as the following:

a = alpha particle 0 = beta particle y = gamma rays b = deuteron e = proton 11 = neutron n = pion x = K meson 11 -= muon X= X-rag’

13

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 10 - SIGNAL WAVEFORMS

10.1 Each symbol represents an idealized shape of the waveform.

--___ No. Symbol Description

____. _---.__ -_

02-10-01 n

JvL 3,

Positive-going pulse

__~

02-10-02 u

Negative-going pulse

__- --~

02-10-03 Pulse of alternating current

---. ~~_~__

02-10-04

_r

Positive-going step function

_-

02-10-05

-l

Negative-going step function

___- __-_

u2-lo-06 Saw-tooth

.-_._ __

SECTION 11 - PRINTING, PERFORATING AND FACSIM1I.E

1 No. 1 Symbol Description

c Tape printing

__-.

Tape perforating or using perforated tape

,

14

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

NO.

02-12-01 Form 1 _-----

02-12-02 ------

02-12-03

M-12-04

____.

02-12-05

02-12-06

--- -- >

Form 2 --

Form 1

Forrn 2

02-12-07

02-12-08

02-12-W

02-12-10

__--

02-12-11

M-12-12

M-12-13

--

02-12-14

02-12-15

CHAPTER 111: OTHER SYMBOLS HAVING GENERAL APPLICATION

SECTION 12 - MECHANICAL CONTROLS

Symbol

--++__

---v--

l --v----

l --- -v- --.. -- -- -8-

__@!___._

I --- L_

-- n-_

__‘n__

.- Description

Mechanical connection (link)

Pneumatic connection (link)

Hydraulic connection (link)

Exumples:

Mechanical connection with indication of direction of

force or motion

Mechanical connection with indication of direction of

rotation.

Noles 1. - The arrow is assumed to be placed in front of

the connection symbol.

2. - Symbol 02-12-W is to be used if the space is

too restricted to permit the use of symbol

02-12-01.

Delayed action

Note. - Delayed action in the direction of movement

from the arc towards its centre.

Automatic return

Note. - The triangle is pointed in the return direction.

Detent

Non-automatic return

Device for maintaining a given position

Detent, disengaged

_~_____

Detent, engaged

Mechanical interlock between two devices

Latching device, disengaged

Latching device, engaged

Blocking device

Blocking device engdg’ed. movement to the left is

blocked

i5

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

NO.

02-12-16

02-12-17

Symbol

--J L__

___JIi-L_

Desaiption

Clutch Mechanical coupling

_

Mechanical coupling, disengaged

02-12-18

02-12-19

_-A-L_ Mechanical coupling, engaged

_LHL_ ? 3

Example:

Unidirectional coupling device for rotation

Free wheel

02-12-20

02-12-21

02-12-22 -----

Brake

Examples:

Electric motor with brake applied.

Electric motor with brake released.

02-12-23 Gearing

16

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 13 - OPERATING DEVICES AND METHODS

Symbol

----

Description

Manually operated control, general case

-___

Manually operated control with restricted access

Operated by pulling

---- Operated by turning

Operated by pushing

Operated by proximity effect

---- Emergency awtch (mushroom-head safety feature)

Operated by pedal

02-13-P! Operated by lever

02-13-12

.-

02-13-13

Operated by removable handle

Operated hy key

02-13-14

02-13-15

--. ______

_-__ Operated by crdnk

Q- ---- Operated by roller

17

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

No.

02-13-16

Symbol

6

A--

Description ~~

Operated by cam

Now If desired. a more detailed drawing of the cam may be shown. This applies Aso to a profile

plate.

02-13-17

CI

Exumplev.

Cam profile

02-13-18

02-13-19

Profile plate

Cam profile (developed representation)

G

Operated by cam and roller

--

02-13-20

I

Operated by stored mechanical energy ---

Now Information showing the form of stored energy

may be added in the square.

02-13-21

E

Operated by pneumatic or hydraulic control, single

-- acting

02-13-22

02-13-23

6s --

0-

--

Operated by pneumatic or hydraulic control, double

acting

Operated by electromagnetic actuator

02-13-24

>

Operated by electromagnetic overcurrent protection ---

02-13-25

+

Operated by thermal actuator, for example thermal ---

relay, thermal overcurrent protection

02-13-26

0

Operated by electric motor

M ---

02-13-27 Operated by electric clock

-

,

18

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 14 - CONTROL BY NON-ELECTRICAL QUANTITIES

14.1 Letter symbols from IEC Publication 27: Letter Symbols to be Used in Electrical Technology, may be used to denote other operating quanti- ties than those shown below (for example pressure or speed). They should be enclosed in a rectangle if ambiguity could otherwise arise

No

02-14-01

Symbol

CL ----

Description

Control by fluid level

02-14-02 B---__

Control by number of events Control by a counter

02-14-03

02-14-04,

02-14-05

IIF Control by flow - ---

p---- Example:

Control by gas flow

______

Control by relative humidity

-

19

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

SECTION 15 - EARTH AND FRAME CONNECTIONS, EQUIPOTENTIALITY

No.

02-15-01

Symhol

A_ - -

Description

Earth, general symbol Ground, general symbol

Note. - Supplementary information may be given to de- fine the status or the puroose of the earth if this is not readily apparent.

02-15-02

m -

Noiseless earth Noiseless ground

02-15-03

0 - -

Protective earth Protective ground

Nov. -This symbol may he used in place of symbol 02-15-01 to indicate an earth connection having a specified protective function, for example for protection against electrical shock in case of a fault.

02-15-04

A7

Frame Chassis

______

Note. - The hatching may he completely or partly omit- ted if there is no ambiguity. If tb- hatching is omitted, the line representing the frame or chassis shall be thicker as shown below:

02-15-05 Equipotentiality

20

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

NO.

02- 16-01

02- 16-02

02-16-03,

SECTION 16 - IDEAL CIRCUIT ELEMENTS

lb.1 Additional indications may be added to the symbols 02-lh-01 to 02-16-03 according to I EC Publication 375: Conventions Concerning Electric and Magnetic Circuits.

Symbol

$ -

Description

Ideal current source

ideal voltage source

_~

Ideal gyrator

21

IS : 12032 (Part %)-I987 IEC Pub 617-2 (1983)

SECTION 17 - MISCELLANEOUS

_.

No. - Symbol Description

02-17-01

9

Fault (indication of assumed fault location)

02-17-02

-..

Flashover Break-through

02-17-03 u Permanent magnet

02-17-04 Moving (for example sliding) contact

M-17-05 t

Test point indicator

Examples of use:

02-17-06

q Changer, general symbol

Converter, general symbol

Notes 1. - If the direction of change is not obvious, it may be indicated by an arrowhead on the outline of the symbol.

2. - A symbol or legend indicating the input or output quantity, waveform etc. may be in- serted in each half of the general symbol to show the nature of the change. See I EC Publication 617-6: Production and Conversion of Electrical Energy, and IEC Publication 617-10: Telecommunications: Transmission.

3. - The diagonal line from this symbol is used in the form of a solidus to show a converting function. See IEC Publication 617-12: Binary Logic Elements, and IEC Publication 617-13: Analogue Elements.

22

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

No.

02- 17-07

Symbol ~ _..__, _

X//Y

Ll

-.--~

Description

Galvanic separator

Nore. - If necessary, indication of the way of separation

may be given below the qualifying symbol.

for example: X//Y

11

Galvanic separation by opto-coupler

K- 17-08 n Identifier of analogue signals

Nore. - The symbol shall be used only when it is neces-

sary to distinguish between analogue and digital

signals.

-~-

W- 17-09 tar

-

Identifier of digital signals

The note with symbol M-17-08 applies.

Nope. - A time-sequenced number (m) of bits may be

denoted m 0.

____- --

L

23

IS : 12032 (Part 2)-1987 IEC Pub 617-2 (1983)

APPEND& A: OLDER SYMBOLS

SECTION Al - OPERATING DEVICE

Al.1 This symbol will be required for a change-over period, but should be superseded as soon as practicable by the symbol 02-13-23.

Operated by electromagnetic actuator

24

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Headquarters:

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