内容介绍: ; V6 z! |9 l, K) p. F 施耐德公司的技术资料,关于短路电流计算,使用的方法有:4 Q8 j! v0 F9 x& _* h0 J) F+ q/ X
1.Calculation of Isc by the impedance method2 o9 [- u' r; E1 H' M2 I" _/ l
1 Introduction p. 43 Q5 `/ s w3 M$ z+ N
1.1 The main types of short-circuits p. 5- W' i- h' _& G8 Y6 l4 T
1.2 Etablishing the short-circuit current p. 7 + K3 j9 l' w. X0 [$ a6 k7 r/ I1.3 Standardised Isc calculations p. 10 6 q% e% D0 v( \+ h1 E1.4 Methods presented in this document p. 11 . M4 d6 B! {) i; V" L! o$ Q1.5 Basic assumptions p. 11$ F d; l% R1 b+ \" F* u9 o- s0 g, j
2 Calculation of Isc by the impedance method 2.1 Isc depending on the different types of short-circuit p. 128 M3 X# Q! R( o
2.2 Determining the various short-circuit impedances p. 13 ! m7 A# q% E; {4 E# ?$ [% L# M! K- R, ~2.3 Relationships between impedances at the different1 j6 w% G. _" k
voltage levels in an installation p. 18 ; _0 ]7 ~- k- \$ D5 a2.4 Calculation example p. 19 3 }8 {$ k# {1 O, b7 L- U3 Calculation of Isc values in a radial 3.1 Advantages of this method p. 23, O T0 T: x' v0 b, q. D
3.2 Symmetrical components p. 23 ( T( b& e& H# }1 e" r2 K3.3 Calculation as defined by IEC 60909 p. 24 9 r# v. G5 i7 H; }5 Y% R3.4 Equations for the various currents p. 26 ! D; l1 r1 |5 C3.5 Calculation example p. 27; g5 v$ |' ^+ [' C# L+ W# L$ `
4 Computerised calculations and conclusion p. 311 q8 W$ h2 B" U+ Z8 ?