1、UDC 621.316.35-422.42 : 62-472 Drilled holes and screw connections for busbars Rectangular cross section busbars : 621.316.584 DEUTSCHE NORM February 198 I . DIN 43 673 Part 1 E .- Stromschienen-Bohru ngen und -Verschraubungen; Stromschienen mit Rechteck-Querschnitt loo - i - j - i - i - i - i - i -
2、 I20 140 I50 1 - I - I - 1201 - I - I - I - I - I - I - I - I20 140 I60 I - I - I - Supersedes July 1971 edition As it is current practice in standards published by the International Organization for Standardization (ISO), the comma has been used throughout as a decimal marker. There are no relevant
3、 regional or international standards in existence which cover the field of application of this standard . Dimensions in mm 1 This standard applies to rectangular cross section busbars, which are specified in DIN 43 670 and DIN 43 671 in respect of constant current rating. This standard specifies the
4、 location and size of drilled holes in busbars and contains basic data concerning the design and construction of the screw connections. If expansion joints in accordance with DIN 46 276 Part 1 to Part 3 are used, the drilled holes and screw connections should in this case also be designed and constr
5、ucted in accordance with DIN 43 673 Part 1. Screw connections for busbars which form part of type tested installations do not come under the field of application of this standard. Field of application and purpose 2 Dimensions, designation Permissible deviations for spacings of hole centres: 2.1 Dril
6、led holes for busbars Designation of a shape 1 drilled hole pattern for busbars of nominal width b = 12 mm and drilled hole diameter d = 5,5 mm: Table I. 0,3 mm Drilled hole pattern DIN 43 673 - 1 - 12 - 5,5 Busbar widths 12to50 I 25 to 60 60 80 to 120 I I 160to200 Shape 1 1 2 3 4 6 a+$* 1601 - I -
7、I - I - I - 1 - I - j - I - 1 - 1 - I 20 I 40 I 40 2001 - I - I -I -I - I - I - I - I - I - I - I 20 I 40 I 50 l) The shape designations 1 to 4 and 6 are in accordance with DIN 46 206 Part 2 “Flat connections“. z, For busbar widths of 120 mrn and over, one end of the busbar or the end of one stack o
8、f busbars shall be slotted Continued on pages 2 to 4 Sole sale rights of German Standards (DIN-Normen) are with Beuth Verlag GmbH. Berlin 30 DIN 43 673 Part 1 Engl. Price group I Sales No. O105 02.83 Page 2 DIN 43 673 Part 1 2.2 Screw connections for busbars (examples) Table 2. Indoors Indoors and o
9、utdoors tZn (hot dip galvanized) in accordance with DIN 267 Part 10 - 8 or higher, in accordance with DIN IS0 898 Part 2 A2G, A4G (gal Zn) B2G. B4G (gal Cd) in accordance with DIN 267 Part 9 8 or higher, in accordance with DIN IS0 898 Part 2 tZn (hot dip galvanized) in accordance with - DIN 267 Part
10、 10 A2-70, A4-70, A2-80 or A4-80 in accordance with DIN 267 Part 11 1.5 23 4.5 10 20 40 2 3 5,5 15 30 60 M 16 80 120 Longitu- dinal connections il E- ) bb+, i Numerical values of dimensions O, d, e,.and e2 as in table 1. Oblong holes are permissible in one end of a busbar or in the end of a stack of
11、 busbars. Bolt Property class 8.8 or higher, in accordance with DIN IS0 898 Part 1 8.8 or higher, in accordance with DIN IS0 898 Part 1 A2-70 or A4-70 in accordance with DIN 267 Part 11 Protection against corrosion A2G A4G (gai Znl B2G,B4G (gal Cd) in accordance with DIN 267 Part CI Nut Property cla
12、ss Protection against corrosion Spring element Conical spring washer 3, in accordance with DIN 6796. in accordance with DIN 6796 Part 2 (at present at draft stage) In the case of M 12 screw threads and of busbars made of E-Alp or E-ALF 6,5 to E-ALF 10, it will be necessary to fit additional washers.
13、 e.4. washer DIN 7349 - 13 St protected against corrosion Lubricant Screw thread and head seatins lubricated of MoS2 base (molybdenum disulphide) Oil or grease M4 Recommended M 5 nom i na I M6 tightening - torque M8 N.m M 10 for screw M 12 I I 3, Other types of spring element which are capable of ma
14、intaining the necessary contact pressure may also be used. If necessary, additional washers must be provided. Nominal tightening torques for non-lubricated fasteners have not been specified, on account of the wide scatter of friction values. DIN 43 673 Part 1 Page 3 4 Screw connections for busbars i
15、n accordance with DIN 43 670 and DIN 43 671 Washer, e. g. in accordance with DIN 7349 Bolt (a hexagon bolt in accordance with DIN 933 is illustrated here) Copper busbar bolted on to copper busbar Copper busbar bolted Gripping onto aluminium busba length A luminium busbar bolted onto (a hexagon miniu
16、m busbar aluminium busbar in accordance i/ with DIN 934 is spring element illustrated here) Il Spring element Standards referred to DIN 267Part9 DIN 267 Part 10 DIN 267 Part 11 DIN 933 DIN 934 DIN 6796 DIN 6796 Part 2 DIN 7349 DIN 43 670 DIN 43 671 DIN 46 276 Part 1 DIN 46 276 Part 2 DIN 46 276 Part
17、 3 DIN IS0 898 Part 1 DIN IS0 898 Part 2 Mechanical fasteners; technical conditions of delivery; components with electroplated coatings Mechanical fasteners; technical conditions of delivery; hot dip galvanized parts Mechanical fasteners; technical conditions of delivery; with addenda to IS0 3506, c
18、omponents of stainless and acid resistant steels Hexagon screws; thread approximately to head; metric thread, types m and mg Hexagon nuts; metric thread, metric fine thread; types m and mg Conical spring washers for screw connections (at present at draft stage) Conical spring washers for screw conne
19、ctions; conical spring washers of stainless steel Plain washers for bolts with heavy clamping sleeves Aluminium busbars; dimensioning for constant current Copper bu sbars; d-i m ension i ng for constant current Switchgear; expansion joints for busbars and flat connections; laminated - flexible Switc
20、hgear; expansion joints for busbars and flat connections; laminated -highly flexible Switchgear; expansion joints for busbars and flat connections; braided - highly flexible Mechanical properties of fasteners; bolts, screws and studs Mechanical properties of fasteners; nuts with specified proof load
21、 values Further standards and documents DIN 43 673 Part 2 DIN 46 206 Part 2 Drfer, K.: Aktuelles ber Stromschienenverschraubungen (New developments in screw connections for busbars), Elektri- zittswirtschaft 78 (1979),34-37 Drilled holes and screw connections for busbars; busbars with channel cross
22、section Connections for electrical appliances; flat connectors 2 40A: principal dimensions and correlation Previous editions DIN 43 673: 12.55; DIN 43673 Part 1: 12.65,07.71 Amendments For amendments made compared with the July 1971 edition, see Explanations. Explanations This standard has been draw
23、n up by Subcommittee 433.1 “Busbars“ of Deutsche Elektrotechnische Kommission im DIN und VDE (DKE) (German Electrotechnical Commission of DIN and VDE) DIN 43 673 Part 1 contains specifications relating to the location and size of drilled holes for busbars and basic data relating to the design and co
24、nstruction of the screw connections. The connections for electrical appliances, flat connectors 40A to 10000A, are featured in DIN 46 206 Part 2. The difference in comparison with the July 1971 edition resides in a differentiated listing of the torques. Tests have demonstrated that the coefficients
25、of friction originally assumed are inadequate in practice. In addition, the bolts with property classes of less than 8.8 have been dropped from clause 3. In lieu thereof, the minimum contact force at the maximum coefficient of friction and at 0,9 times the nominal tightening torque (scatter) have be
26、en incorporated, as these are required for switchgear in accordance with older standards. The screw connections which comprise only one bolt presuppose that the busbars are adequately supported, so as to prevent with absolute certainty any slackening of such screw connections. Page 4 DIN 43 673 Part
27、 1 Bolt, nut, surface Indoors Indoors and outdoors gal Zn, gal Cd tZn 1 A2-70, A4-70 Lubricant Overall coefficient of friction from to CIGeS I Minimum contact force attained when applying a nominal tiahtenina toraue in accordance with table 3 I Screw thread 1 Gripping length Oil or grease of MoS2-base (molybdenum d sulphide) 0,05 0,105 0.13 0,12 0,15 0,21 “ “. mm kN M4 I 1.55 2.15 3.20 I 4to 8 4to 12 4to 18 1,40 1,55 2,60 M 16 M8 M 10 M 12 10 to 120 20.1 19,3 4 to 60 6to 60 10 to 120 4.15 6.15 12.6 3,95 5,30 15,l
