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 ह ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 15295 (2003): Electric Resistance Welding - Integrated Transformers for Welding Guns [PGD 18: Industrial and Production Automation Systems and Robotics]
Transcript
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 15295 (2003): Electric Resistance Welding - IntegratedTransformers for Welding Guns [PGD 18: Industrial andProduction Automation Systems and Robotics]
IS 15295:2003ISO 10656:1996
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Indian Standard
ELECTRIC RESISTANCE WELDING—INTEGRATEDTRANSFORMERS FOR WELDING GUNS
ICS 25.160.30; 29.180
0 BIS 2003
BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
February 2003 Price Group 4
Industrial and Production Automation Systems Sectional Committee, BP 18
NATIONAL FOREWORD
This Indian Standard which is identical with ISO 10656:1996 ‘Electric resistance welding — Integratedtransformers for welding guns’ issued by the International Organization for Standardization (ISO) wasadopted by the Bureau of Indian Standards on the recommendation of the Industrial and ProductionAutomation Systems Sectional Committee and approval of the Basic and Production Engineering DivisionCouncil.
The text of the ISO Standard has been approved as suitable for publication as Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention
is particularly drawn to the following:
a) Wherever the words ‘International Standard’ appear referring to this standard, they shouldbe read as ‘Indian Standard’.
b) Comma (,) has been used as a decimal marker in the International Standard while in IndianStandards, the current practice is to use a point (.) as the decimal marker.
Where there are no corresponding Indian Standards for the International Standards referred in this IndianStandard, reference to the relevant International Standard maybe made.
Technical Corrigendum 1 to the above International Standard has been incorporated.
For the purpose of deciding whether a particular requirement of this standard is complied with, the finalvalue, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordancewith IS 2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places
retained in the rounded off value should be the same as that of the specified value in this standard.
IS 15295:2003ISO 10656:1996
Indian Standard
ELECTRIC RESISTANCE WELDING—INTEGRATEDTRANSFORMERS FOR WELDING GUNS
1 Scope
This Interrmtlonal Standard specifies transformers forelectric resistance welding used in welding guns withintegrated transformers (robot guns).
For these transformers it supplements the require-ments given in ISO 5826 which remain applicablewhen not amended in this International Standard,
2 Normative references
The following standards contain provisions which,through reference in this text, constitute provisions ofthis International Standard. At the time of publication,the editions indicated were valid. All standards aresubJect to revision, and parties to agreements basedon this International Standard are encouraged to in-vestigate the possibility of applying the most recenteditions of the standards indicated below. Members
..-
of IEC and ISO maintain registers of currently valid in-ternational Standards.
ISO 5826:— 1), Transformers for resistance weldingmachines — General specifications appkab)e to alltransformers.
IEC 417:1973,ment. Index,sheets.
Graphical symbok for use on equip-survey and compilation of the single
3 Types of transformer (variable lengthdimensions)
Length dimensions and electrical characteristics fortransformer types are given in table 1.
The transformers are suitable for duty cycles up to
20 Y. (see annex A)
Table 1 — Types of transformer, lengths and electricalcharacteristics
The centre point of the secondary coil shall be earthedby a removable link.
5.2 Thermal protection
Primary and secondary coils of the transformers shallbe equipped with thermostats having contacts thatare normally closed. The position of the wiring shall beaccording to figures 1 and 3. The insulation shall beadequate for the test conditions of this InternationalStandard.
The colour code of wiring is as follows
primary wiring: sky blue
secondary wiring: black
5.3 Current detector
The secondary coil shall be equipped with a device forthe measurement of the secondary current having thefollowing characteristics:
degree of protection: 1P 55;
output: 150 mV/kA, + 1,5 ?40to -1,5 ‘XOat a load of1000 !2 under full wave, full voltage conditions upto 80 “C with a tolerance after mounting in trans-former of * 3 O/O.
The internal resistance of the detector shall be 10 ~
tO 50 ~. The detector shall be a toroidal coil and not a
cylindrical COII,
The colour code of wiring is white and brown.
5.4 Mechanical strength
After being tested according to 9.1, the transformershall have no permanent deformation.
6 Marking
Identification for the earth and two voltage connec-
tions shall be clearly marked: U, V and the symbol ~(see IEC 417),
The polarity on the secondary side should be Indicatedon the transformer andlor the data sheet.
6.1 Name plate
The name plate shall conform to ISO 5826.
6.2 Colour of exterior finish
See table 2.
Table 2 — Coiour code following no-loadsecondary voltage
5,6 hlac
6,3 blue
7,1 green
8 grey
I 10 I yellow
I 13,5 I brown
7 Shipping
All holes shall be closed, The cooling tubes shall bedrained and the ends plugged. The terminals shall beprotected to avoid damage during shipment andstorage.
8 Designation
The designation of a transformer for welding gunswhich comply with the requirements of this inter-national Standard shall comprise the following infor-mation in the order given:
a) the complete designation (i.e. “Transformer”);
b) reference to this International Standard;
c) the type of transformer (e.g. “J “);
d) no load voltage U20, secondary current 12P, nom-inal primary voltage UIn;
e) indication of thermal protection T;
f) indication of current detector M.
EXAMPLE
TransformerISO 10656- J -7,1-5,4-400 -TM
2
IS 15295:2003ISO 10656:1996
J6
8Maximum permissible
8 max.protuberance formeasuring coil
I +b,s I I l\
Dimensions in rnillirnetres
2 x RP 1/4 X 10 (ISO 7-1)7
w58 0 1* *0,5
-1L“ Connection boxI
1,
8x06 H7x816x M8 x12
r! –1 Fitted with steel inserts.
J ; 2
+ Wire type inserts are not acceptable.
‘- —. —._._I
L -— +2 / 10 1F. I
I
all-J
Output area *) Water holes can be positioned anywherefor M and T a~ong this dimension.
*)*) see figurez.
Figure 1 — Dimensions of type H transformers
Dimensions m milllmetres12
d10
06 lug, 10 mmz cable
I
1I / \ 4
4/&
m
\
+’—.— I~-~
X*’*) See figure 1.
3
– UJ6 contact pin
_“ J—-
uFigure 2 — Size and location of the 3 M6 holes intended for supply connection of type H transformers
3
IS 15295:2003ISO 10656:1996
Maximum permissible a r“’’”
protuberance for –measuring coi(
Dimensions in millirnetres
2 x RP 1/4 X 10 (ISO 7-1)7
w— Connection box
16 XM8 X12
(16 X MIO X 15
for U2 =13,5 Vonly)Fitted with steel inserts,
Wire type inserts are not acceptable.
Nm
NOTE - For marking see clause 6.
~hsj ~ Output area *) Water holes can repositioned anywherefor M and T along this dimension.
*)*) See figure 4,
Figure 3 — Dimensions of type J transformers
Dimensions in rnillimetre5
Insulating barrier 08 lug, 16 mmz cable
/1 \l
+4I
Y*’
*) See figure 3.
r 08 contact pin
+“”-”““lL.._
fY
6
--——.—
“—”----
1 F“”-J
Figure 4 — Size and location of the 3 M8 holes intended for supply connection of type J transformers
9 Testing
Tests shall be those as given in ISO 5826 when notamended in this clause.
The following additional tests are required.
9.1 Mechanical strength
The transformer shall be solidly secured on two platesthrough the four M8 or MIO fixing holes of two op-posite faces and a tensile load of 10 kN shall be pro-gressively applied to the faces so that maximumloading is obtained after 1 rein, and maintained for1 more min. The test shall be repeated on the othertwo faces.
9.2 Current detector
The testing of current detector shall be left to the dis-cretion of the manufacturer, providing the require-ments in 5.3 be fulfilled.
9.3 Insulation of thermostats
The thermostats and their connecting circuits shallwithstand a test voltage of (2 Uln + 1 000) V for 1 min.
IS 15295:2003ISO 10656:1996
9.4 Dielectric tests
Voltage is gradually increased from O V up to:
primary - secondary 4 kV
primary - case 4 kV
secondary - case 1 kV
each test lasting 1 min.
9.5 Thermal test
The heat rise and temperature limits shall conform toISO 5826 up to a duty cycle of 20 ?4..
The test shall be done with nominal primary voltage ata load time of 240 ms and a duty cycle of 20 ?40. Thecooling water flow shall be 4 l/rein.
9.6 Dynamic type test of the outlets
The transformer shall withstand the dynamic effortsbrought about by a repetitive flow of welding currentwhich shall be as high as possible, but not more than5 times the permanent current, in the conditionsshown in figure 5,
The value of a is measured before and after the tests.After the 2500 cycles, the variation of secondaryoutlets shall not involve an increase of a by more than10 mm.
1, I I I I I I I I I I I I I I I I30 37 48 60 75 94 120 150 185 200 300 375 480 600750 9451200 1890 3000
1500 2400
Cycles/rein at 50 Hz (50 cyc(es/s)
Figure A.1 — Relationship between secondary current [2 and duty cycle
IS 15295:2003ISO 10656:1996
Annex B(informative)
Bibliography
[1] ISO 1302:1992, Technical drawings — Method of indicating surface texture.
8
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau cJfZmiian Skmdards Act, 1986 to promote harmonious
development of the activities of standardization, marking and quality certification of goods and attending toconnected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing
the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating tocopyright bc addressed to the Director (Publication), BIS.
Review Of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewedperiodically a standard along with amendments is reaffkmed when such review indicates that no changes are Lneeded: if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standardsshould ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of“BIS Catalogue’ and’ Standards: Monthly Additions’. 6
This Indian Standard has been developed from Dot: No. BP 18(030 1).
Amendments IssueLISince Publication
Amend No. Date of Issue Text Affected
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