इ टरन ट म नक 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. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live प0र 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS 11794-2-6 (1986): Laminations for Transformers and Inductors for Use in Telecommunication and Electronic Equipment, Part 2: Preferred Ranges of Laminations, Section 6: Lamination Type YUI-1 [LITD 5: Semiconductor and Other Electronic Components and Devices]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ च0र य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen
UDC 621 3 042 2 : 621 3WPi : 621.313 43 : 021.331 39 033 IS : 11794 ( Part -2/Set 6 ) - 1986 Indian Standard SPECIFICATION FOR LAMINATIONS FOR TRANSFORMERS AND INDUCTORS FOR USE IN TELECOMMUNICATION AN-D ELECTRONIC EQUIPMENT PART 2 PREFERRED RANGES OF LAMINATIONS Section 6 Lamination Type YUI-1 1. Scope -This standard ( Part P/Set 6 ) covers dimensions and tolerances together with the effective parameters of laminations of type YUI-1. 2. Description - These are economy range of laminations, allowing scrap!ess punching and are used For large power transformers and chokes. These dimensions of side a of this range varies from 30 to 240 mm and the ratio of lamination area ( AB ) to window area ( Aw ) is 4 0 where: AIF =a(b+f)-aw Aw=ce 3. Dimensions and Effrctive Parameters - Dimensions and effective parameters are given in Table 1. EXP-LANATORY NOTE This standard is being issued in two parts : Part 1 covering general requirements and tests, and art 2 covering preferred~ranges of laminations. Part 2 has the following sections: Section 1 Lamination type YEI- Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Lamination type YEx-2 Lamination type YED-2 Lamination type YEx-3 Lemination type YEx-4 Lamination type YUI-1 Lamination type YM-1 This standard ( Part 2/Set 6) should be read in conjunction with IS : 11794 ( Part 1 )-1980 Specification for laminations for transformers and inductors for use in telecommunication and electronic equipment : Part 1 General requirements and tests. The effective parameters given in this standard ( Part P/Set 6 ) are based on a stacking factor CL If 0.95 and a stacking height equal to d. For calculation in the case of different stacking factors, see 9.2.2 of IS : 11794 ( Part 1 )-1986. In the~table of dimensions and parameters, the direction of rolling in the case of grain-oriented naterial-has been indicated by a double-arrow. This standard is based, without any technical change, on IEC Pub 740 ( 1982 ) Laminations for ransformers and inductors for use in telecommunication and electronic equipment, issued by the nternational Electrotechnical Commission ( IEC ). Adopted 30 October 1936 I Q April 1937, BIS I Gr 1 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002
TABLE 1 DllhENSlDNS AND TOLERANCES OF TYPE YUI-I ( Clause 3 ) 1 -+ t (SEE NOTE 21 d A 1 -c w 4-f* 4 b c All dimensions in millimetres. Designation Reference Letter and Tolerance Code [See Table 4 of IS : 11794 ( Part I)-1988* ] Effective Parameters f a lt 12 *G 12 &I2 d f,et 12 f 1; 12 Core Area A (st-2~) Magnetic pa*hi:ngth (mm) Core o:u,, (cm*) Core Constant YUI l-26 40 8: 1:: YUI I-30 90 120 YUI 1-34 102 136 YUI 1-38 114 152 YUI l-44 132 176 YUI I-50 150 200 30 39 :: 75 1:: 114 132,150 : 3 16 20 25 30 34 38 44 50 l&5 243 380 594 855 1098 1 372 1839 2 376 120 11 4 156 25 1 192 46 7 240 91 2 300 178 360 408 340488 456 626 528 971 600 1 425 12.6 9.69 x:s 5 05 4 21 8.72 3.32 2.87 2 53 ::I :-:z YUI 1:70 YUI l-80 168 224 168 180 240 180 210 280 210 240 320 240 56 60 E 2 979 3 420 4 655 6 080 672 2 000 720 2 460 840 3 910 960 5 840 2 26 2.11 1 80 1 58 3d 7 4d 3d Id Id Id /*e=2ib+2(a-d)=12d Note 1 -When larger sizes are required it is recommended thdt the iatios indicated in the iast line of the table are maintained [see 5.4 of IS : 11794 (Part I)-1986*]. Note 2 - Double arrow indicates dlrection of rolling. *Specification for laminations for transformers and induttors for use In telecommunication and electronic equipment: Part 1 Generai requirements and tests.