内容介绍: $ f& O% s4 p) a 施耐德公司的技术资料,关于短路电流计算,使用的方法有: : D; F: L5 c5 ^, ?8 W1 x4 T$ r1 J1.Calculation of Isc by the impedance method + V" |" s* N! C' I8 i# }( p1 ?1 Introduction p. 4 3 S y# W* }2 X9 @! @7 l" n) d, U% v1.1 The main types of short-circuits p. 5 : u) f0 M/ w. J: T6 g: C# I1.2 Etablishing the short-circuit current p. 7 / h$ o) y3 H+ Y" c7 m. v1.3 Standardised Isc calculations p. 10 3 L0 W! h. u% F8 h* ?1.4 Methods presented in this document p. 11 ! R. L7 @5 y1 V: c1.5 Basic assumptions p. 119 ?7 h1 Z7 f5 P2 y* x
2 Calculation of Isc by the impedance method 2.1 Isc depending on the different types of short-circuit p. 12 9 s4 o* J7 ]2 V* I( V! Y% H2.2 Determining the various short-circuit impedances p. 13& ?2 O: L6 P, G1 ]
2.3 Relationships between impedances at the different $ N8 o5 l7 \9 E, Tvoltage levels in an installation p. 18 / e. f ^7 R1 F2 Z6 {- u" d: ?3 x2.4 Calculation example p. 19/ Z- [! [0 T- a& b3 M! ], U
3 Calculation of Isc values in a radial 3.1 Advantages of this method p. 23, {$ x. O T- K9 x
3.2 Symmetrical components p. 232 }9 F. A0 l' w+ K" Z: m* l3 i
3.3 Calculation as defined by IEC 60909 p. 24 7 c5 E, d; z7 O% o0 F3.4 Equations for the various currents p. 26+ D7 w3 t" m! a- @# F( l- \
3.5 Calculation example p. 27) h7 K1 E d: _/ ^$ Y
4 Computerised calculations and conclusion p. 315 g8 r/ i0 @, V) _