The mechanical effects of short-circuit currents in - Montefiore

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8.7. ERRATA TO BROCHURE NO 105 In Volume 1 of the Brochure No 105 THE MECHANICAL EFFECTS OF SHORT-CIRCUIT CURRENTS IN OPEN AIR SUBSTATIONS (Rigid and Flexible Bus-Bars) April 1996 misprints were detected and the reader is asked to correct them as follows: Section 3.4.1, p 30, right column: In the para following equation (3.12), replace and q = 1,7 by q = 1,7 and Section 4.2.5, p 42, right column: In the para following equation (4.15), replace (4.13) by (4.15) Section 4.2.6, p 43, right column: Replace equation number (4.10) by (4.17) In the next para, replace with (4.14) by above Section 4.3.2.1, p 46, right column: In equation (*43), replace ls ≤ 50 as by ls ≥ 50 as In equation (*44), replace ls ≤ 70 as by ls ≥ 70 as Section 4.3.2.2-4.3.2.6, pp 47-52: Renumber equations (4.11) to (4.32) respectively by (4.18) to (4.39) respectively [shift by 7]. In accordance, the references in these subsections are to be replaced by the changed numbers Section 4.3.2.3, p 49, right column: Replace equation number (*A.5) by (*A.6) Section 4.5.1, p 55, right column: 140 Replace equation number (4.3) by (*19) Section 4.5.1, p 56, left column: Replace equation number (4.33) by (4.40) and equation number (4.34) by (4.41) Section 4.5.1, p 56, right column: In the first equation, replace equation number (4.35) by (4.42) In the equation following equation (*25), replace equation number (4.35) by (4.43) Replace equation number (4.28) by (4.44) and equation number (4.36) by (4.45) In the para following equation (4.43), replace 15 and 300 by 0.4 and 8 Section 5.3.1, p 72, right column: In the last para, replace 1.35 – 1.5 by 1.3 – 1.7 and [39] by [107], see also section 3.4.1 Section 5.3.1, p 73, left column: In the last para, replace formula 4.2.6 by formula (*34) in section 4.2.4, see also section 4.3.3 Section 5.3.2, p 74, right column: Delete the para On the other hand ... calculation methods.
Section 5.3.2, p 75, right column: In the second para, delete (section 5.3) 141
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THE MECHANICAL EFFECTS OF SHORT-CIR
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3.7. Special problems .............
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1. INTRODUCTION 1.1. GENERAL PRESEN
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The pinch (first maximum) can be ve
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1.3.3.2 Supporting structures Simil
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This method allows to state the sho
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and becomes the static force in equ
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(2.26) M el-pl ⎡ y d/ 2 y = 2⎢
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V σ 3 2,5 2 1,5 1 mechanical reson
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V F 3 2,5 2 1,5 1 mechanical resona
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1. eigenmode 2. eigenmode 3. eigenm
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(2.43) U E max max = 1 2 1 = 2 l
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m (2.47) M = σm = Z mσ m dm 2 J w
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profiles in Figure 2.14 it follows
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(2.71) 2 tube tube 4 tube U ∂U
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2.3.2. Influence of two busbars a)
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Asymmetrical associated-phase layou
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d)Methods used IEC 60865 method : -
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Section 3.4 deals with the effects
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In Figure 3.5 to Figure 3.8, the ma
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Figure 3.17 Comparison calculated a
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movement of the dropper (swing out
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This value has to be compared with
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EN 60865-1 [Ref 3] with the assumpt
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a) b) c) 3 m 2 1 0 -1 δ m δ 1 Mov
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Droppers with fixed upper ends Duri
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Manuzio developed a simplified meth
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From prior tests the stiffness valu
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Force / kN Force / kN 100mm 200mm 4
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1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 ESL F
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3.7. SPECIAL PROBLEMS 3.7.1. Auto-r
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for the maximum outswing and the ma
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Zug-/Druck-Kraft in kN Z eit in s F
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The numerical resolution of these e
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4. GUIDELINES FOR DESIGN AND UPRATI
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standards and tested under specifie
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5. PROBABILISTIC APPROACH TO SHORT-
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f G f(L) Lt Ls 75 G(L) ∞ R = ∫
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Only the lowest break values are im
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5.2.2. A global Approach For analyz
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to multinode operation can compared
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5.2.3.1.7. Proposed Approach The st
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The first case (Figure 5.14) corres
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centers are normally balanced by ba
Page 90 and 91: Remark: The risk integral (5.3) can
Page 92 and 93: 1,0 0,8 0,6 0,4 0,2 0,0 -0,2 -0,4 -
Page 94 and 95: The histograms below for the instan
Page 96 and 97: 5.2.3.8.2. Reliability based design
Page 98 and 99: power converter in a three phase br
Page 100 and 101: The time functions of the currents
Page 102 and 103: a) Determination of the linear mome
Page 104 and 105: Figure 6.11 Coefficients mJs1 and m
Page 106 and 107: 7. REFERENCES Ref 1. IEC TC 73/CIGR
Page 108 and 109: Ref 42. Stein, N.; Miri, A.M.; Meye
Page 110 and 111: Ref 80. Fiabilité des structures d
Page 112 and 113: 8. ANNEX 8.1. THE EQUIVALENT STATIC
Page 114 and 115: Figure 8.2 What is ESL in this case
Page 116 and 117: As the eigenfrequency of the portal
Page 118 and 119: Figure 8.9 Case 3 (third eigenfrequ
Page 120 and 121: Both cases have the same 200-kV-arr
Page 122 and 123: a) c) 5 +25 % 0 % 4 3 F c / F st 2
Page 124 and 125: a) b) 24 kN 20 +25 % 0 % 2,0 m F c
Page 126 and 127: Case *11 (EDF 1990) This is the 102
Page 128 and 129: 8.4. INFLUENCE OF THE RECLOSURE The
Page 130 and 131: ( ( δ ) ( δ ) ) T = Mg08 . b r .
Page 132 and 133: IEC 60865 Calculations If the clear
Page 134 and 135: 8.6.1.1 With calculation of the rel
Page 136 and 137: f) Calculation of the stresses due
Page 138 and 139: d) Determination of the forces at t
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