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Jawaharlal Nehru
IS 10314 (1982): Dimensions for ceramic bushings for
terminals [ETD 6: Electrical Insulators and Accessories]
“!ान $ एक न' भारत का +नम-ण”
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है”
ह
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“Knowledge is such a treasure which cannot be stolen”
( Reaffirmed 2001 )
IS:10314-1982
Indian Standard
DIMENSIONS FOR CERAMIC BUSHINGS
FOR TERMINALS
Electrical
Insulators
Chairman
SNRI P. M. AHLUWAL~A
and Accessories
Sectional
Committee,
ETDC
3
Representing
Central Electricity
Authority, New Delhi
Members
DIRECTOR ( TRANSMISSION )
( Alternates to Shri P. M. Ahluwalia )
DY DIRECTOR ( SUB-STATION
1
Directorate
General
of Posts
and
Telegraphs,
SRRI U. R. G. ACHARYA
Jabalpur
Dy GENERAL MANAGER (T) ( Alternate )
Directorate General of Supplies and Disposals, New
SIXRI R. S. hORA
Delhi
SHRI ANIL GUPTA ( Alternate )
Directorate General of Technical Development, New
SHRI
D. S. CH~~BHAL
Delhi
Bengal Potteries Ltd, Calcutta
Srrnr CRANUER PARKASH
SIIRI S. C. SEN ( Alternate )
Tag Corporation, Madras
SHRI
R. T. CHARI
SHRI
A. GURUP.*TIIAM ( Alternate )
Punjab State Electricity Board, Patiala
SHRI A. K. CIIOPRA
SHRI
K. K. PURI ( Alternate )
AND
Research
Designs and
Standards
Organization,
( TRACTION
DIRECTOR
Ministry of Railways, Lucknow
INSTALLATI~I~ )
JOINT DIRECTOR STAND.YRDS (Tl) ( Alternate )
Rural Electrification Corporation Ltd, New Delhi
SARI G. L. D~JA
SHRI
S. B. D&HKAIE (Alternate )
High Tension Insulator Factory, Ranchi
SHRI K. R. KA~HY~P
SHRI A. K. A~ARWAL ( Alternate )
Bharat Heavy Electricals Ltd; Bhopal
SHRI B. KRIS~NAM~ORTHY
SHRI M. L. M~TTAL ( Alternate I )
SHRI R. SUBBA RAO ( Alternate II )
Tamil Nadu Electricity Board, Madras
SHRI I. C. KUPYUSWAMY
SHRI N. R. SANKAR~N ( Alternate )
Karnataka Electricity Board, Bangalore
SHRI H. M. S. LINGAIAH
National Test House, Calcutta
SHRI S. K. MLJ~~IERJEE
SIERI P. C. PRAUHAN ( Alternate )
Indian
Electrical
Manufacturers’
DR G. M. PH~DI~E
Association,
Bombay
SHRT P. R~.\~.wII.YNDR~\N
( A~IPrrznte
)
( Continued on bage 2 )
@ CopVrighl 1983
INDIAN STANDARDS
INSTITUTION
This publication is protected under the Indian Copyright Act ( XIV
of 1957 ) and
reproduction in whole or in part by my means except with written permission of the
publisher shall be deemed to be an infringement of copyright under the said Act.
( Continued
from page 1 )
Members
Representing
SHRI P. S. RAMAN
New Government Electric Factory Ltd, Bangalore
SHRI E. P. WILFRED ( Alternate )
SHRI H. K. RATHI
Maharashtra State Electricity Board, Bombay
National Thermal Power Corporation, New Delhi
REPRESENTATIVE
U.P. State Electricity Board, Lucknow
SEIRI V. N. RII~H
SHRI V. B. SINCJH( Alternate )
Electra Metal Industries, Bombay
SHRI R. D. SIXETH
W. S. Insulators of India Ltd, Madras
Snttr G. M. SRIKANTAN
SHRI R. G. VANOHEESWARAN ( Alternate )
Government Pottery Development
Centre, Khurja
SHRI SURENDRA SINGH
(UP)
SHRI T. B. L. SRIVASTAVA ( Alternate )
Seshasayee Industries Ltd, Vadalur Post
SHRI L. V~NRATESURBU
SHRI R. V. ACKUTHAN ( Alternate )
Director General, IS1 ( Ex-oj%io Member )
SHRI S. P. SAC1InnV,
Director ( Elec tech )
Secretary
SHRI Josa MATHEW
Assistant Director ( Elec tech ), IS1
Panel for Dimensions
of Bushings,
ETDC
3/P3
Convener
SnRI V. SRlNIVAS_4N
W. S. Insulators of India Ltd, Madras
Members
Central Electricity Authority, New Delhi
DY DIRECTOR ( SUB-STATION ) ( Alternate )
Crompton Greaves Ltd, Bombay
SHRI S. V. MAKC;ERIKAR
Bharat Heavy Electricals Ltd, Bhopal
SHRI M. L,. MITTAL
SHRI S. P. SINGH ( Alternate I )
SHRI B. KRISHNAMOORTHY ( Alternate II )
Bharat Bijlee Ltd, Bombay
SHRI R. G. PRADHNANI
Transformers & Electricals Kerala Ltd, Angamally
SHRI P. RAMAOHANDRAN
South PO
SHRI KURIAK~SE ANTONY ( Alternate )
New Government Electric Factory Ltd, Bangalore
SHRI P. S. RAMAN
High Tension Insulator Factory, Ranchi
DR U. S. SINRH
SHRI A. D. DUA ( Alternate )
DIRECTOR ( SUB-STATIONS )
2
IS : 10314- 1982
Indian Standard
DIMENSIONS FOR CERAMIC BUSHrNGS,
FOR TERMINALS
0.
FOREWORD
0.1 This Indian Standard
was adopted by the Indian Standards
Institution
on 22 September
1982, after the draft finalized by the
Electrical
Insulators and Accessories Sectional Committee
had been
apfiroved by the Electrotechnical
Division Council.
0.2 This standard covers the dimensions for ceramic bushings ,for
terminals for power capacitors and other electrical equipment.
0.3 It has not been found possible to cover the requirements and methods
of tests for ceramic bushings in this standard. . However it .is intended,
to cover these requirements in a separate Indian Standard, or if necessary
to modify the present standard, at a later stage.
The properties of
ceramic material to be used in the manufacture of bushings are covered
in IS : 8765-1978”.
0.4 In preparing
DIN 41108-1971
Normenausschuss.
this standard,
assistance has been derived from
‘Ceramic
terminal tubes’, issued by the Deutscher
0.5 For the purpose of deciding whether a particular requirement of this
standard is complied with, the final value, observed or calculated,
expressing the result of a test, shall be rounded off in accordance
The number of significant places retained in the
with IS : 2-1960*.
rounded off value should be the same as that of the specified value in this
standard.
1. SCOPE
1.1 This standard covers the dimensions for ceramic bushings required
for insulating the terminals of electrical equipment, such as rotating
machines and power capacitors.
*SpEification for ceramic insulating materials for electrical purposes.
“$R u 1es for rounding off numerical values ( reu&d ).
L3
1.2 This standard covers the ceramic bushings for flameproof
enclosures
dS0.
1.3 Ceramic bu&ings emaxred in&at standard are c&y the insulating
inserts. MetaIk terminal studs and fastners shall be selected according
to the requirements of the ~otasing machines and power capacitors.
2. TERMINOLOGY
2.0 For the purpose
apply.
of this standard
the following
definitions
shall
2.1 Ceramic Terminal
Tube - A cylindrical tube of ceramic material
with lnetalic coating at buth en& remouter periEihery and used as insert
between terminal and fbbaseplate.
2.2 Flameproof
Cemaanic TkmixsaI
Rstsh -A
ceramic bush with
metallic housing for fixing to base pIate and satisfy the conditions of
%btmepro&ss
specked ,in IS : 2146-1981”.
3, MATERIAL
3.1 The materid &xrceramic bus&gs
.sh&ll conform to I5 : 8765- 1978t.
4. DIMRNgIGNs
4.1 The dimensions of ceramic terminal tubes shall conform to Fig. 1.
4.2 T,he dimensions
conform to Fig. 2.
of
flameproof
ceramic
terminal
bushings
*Specification .fixrtkmqwmf ~IICIEBUIW
of &e&al wparatus ( .wcond ~GUR
tSpecification for ceramic insulathg tmtials
for ehx@rical purposes.
4
shall
)a
METAL COATED OR TIN PLATED
FOR SOLDERING
OUTSIDE
DIAMETER
4
I&SIDE
DIAME~R
4
‘LENQTXi
L
R
BI
B,
(1)
(2)
(3)
(4)
(5)
(6)
10
3’5 + 1
-0
38
I6
6
8
12
‘25 + 1
-0
38
16
6
8
16
5
+1
-0
30
12
6
6
20
*
+I
-0
52
21*5
105
8
8
9
10
9
&%EEPAGE
DISTANCE
24
;,
+ 1’5
‘- 0
50
24
24
I*
+ I55
-0
86.5
38.5
LENUTH OF METAL
c--*_---_~
NOTE 1 -The allowable tolerances on lengths shall be f
@a shall be f ( 033 il + 02 ) mm, where d is the diameter.
1 mm and on diameter
ceramic terminal tubes may be fixed to the base plate
NOTE 2 -The
required, by means of permanent cement or soldering the metal coating.
All dimensions in millimetres.
Fro.
;l
DEMENSIONSOF CERAMIC TERMINAL
5
COATING
TUBE
wherever
.
.
--
FLAME PROOF JOINTS FILLED
YITH PERMANENT
CEMENT
TC LOCK RING
SIZE
INSIDE
M;w~;;J~
DIAXETw
.--
DI~~B
OF
ToltW’
anti
)
... %
‘-we
s,
._
01
M16x
1.5
AXIAL
LWGTS
TEBEADIiwoti
LENGTH
OFFLAME
PaTa
(IWin)
w--Y
Hovsma w;;
( Min )
LF
(3)
(4)
(5)
(6)
4
+ ‘*
+ 0.4
13
25
CREEPAQE
DIBT-
FACE
_.SIONS OF t--M
HEZUUp to
,%& .GONAL
PIId
&AD
Indud-
( &fin )
ing
250 V
FP
(7)
25
‘kEhKANCE
BET-N
EARTH
PHASETO
( Min
Tgl+
), E
;+--___--*---.--~
Above
250v
Up to
and
Including
650V
(6)
(9)
(10)
19
16
25
Above
650 v
so
Including
11ODV
and
Includ-
Above
250 v
Up to
25%
InXk
VP to
.
65%’
Above
650 V
so
Includ1 ;;;opV
(11)
(12)
(13)
(14)
32
13
19
25
02
M16X
1.5
03
M20x
l-5
04
M24X
1.5
05
M30x
1.5
06
M30x
1’5
07
M36x1.5
08
M42x1.5
3
+ 0.8
+ o-4
13
25
25
19
16
25
32
13
19
25
6
+ 0.8
+ O-4
13
25
25
24
16
25
32
13
19
25
8
+ 1.0
+ o-4
13
2.5
25
30
16
2.5
32
13
19
25
10
+ 1.0
-+ 0.4
13
25
25
36
16
25
32
13
19
25
12
+ 1.1
+ 0.4
I3
25
25
36
16
25
32
13
19
25
16
+ 1.1
+ 0.4
13
25
25
46
16
25
32
13
19
25
20
+ 1.2
+ cl.4
13
25
25
55
16
25
32
13
19
25
The
NOTE lon the bushing.
NOTE 2 -
creepage distance
The clearances
‘K’ may be increased irrespective
along the lengths of flamepaths
cementas given in Appendix A of IS : 2148-1981*.
of dimension
of metal to ceramic
‘E’ by providing
joints shall
suitable contours
be filled with
permanent
The threaded length ‘LF’ of the flameproof ceramic terminal length shall have minimum engagementof
NOTE 3 8 mm when measured axially and tortuous length over the engaged threads shall be at least l-5 times the axial length.
At least five full threads shall be engaged when it is fixed in position.
The clearance
( gap ) along the threaded
tortuous length shall conform to IS : 2148-1981*.
NOTE 4 - The inner and outer surfaces
glazed and the ends shall be unglazed.
*Specification
for flameproof
( except
enclosures of electrical
surface
covered
apparatus
by metallic
housing ) of the
bushing shall be
( second revision ).
t:
All dimensions in millimetres.
FIG.
2
DIMENSIONS
OF FLA~~EPROOF
TERMINAL
BUSHING
g
Z
s
5:
E
INTERNATIONAL
SYSTEM OF UNITS ( SI UNITS )
Base Units
QUANTITY
UNIT
%MBOL
Length
metre
m
Mass
kilogram
k
Time
second
S
Electric current
ampere
A
Thermodynamic
temperature
kelvin
K
Luminous intensity
candela
cd
Amount of substance
mole
mol
Supplementary
Unite
UNIT
QUANTITY
SYMBOL
Plane angle
radian
rad
Solid angle
steradian
sr
UNIT
SYMBoL
Derived Units
QUANTITY
DEFINITION
Force
newton
N
Energy
joule
J
Power
watt
W
1 W = 1 J/s
Flux
weber
Wb
1 Wb = 1 V.s
N =
1
1 kg.m/ss
J = 1 N.m
Flux density
tesla
T
1
Frequency
hertz
HZ
1 Hz = 1 c/s (s-1)
T = 1 Wb/ms
Electric conductance
siemens
s
1
S = 1 A/V
Electromotive
volt
V
1
V=
Pascal
Pa
1 Pa = 1 N/m*
force
Pressure, stress
1 W/A