交流电气装置的过电压保护和绝缘配合DL_T_620-1997.pdf

3 35. 1 n c u iw = 3/p.u.0 . 1 m u= 3/2p.u.0 . 1 m u= p.u.31 . 1p.u.3 )/(4 . 0 2 13m kxr n.c 25 . 2u s c 25 ih i u h p 5 . 5 = p d hh 7 0 = 2 x h h 2 x h h p d hh 4 o = 2 x h h 2 x h h p d f 7 = p d hh 5 o = p d f 5 = 3/ m u 3/ m u )59. 0( 3 m m u u 3/;64. 0 gmm uu 3/ m u 3/ m u3/ gm u 3/1 . 1 m u 3/ gm u hll l hlhl hl hlh r r 2 )6.2( 1 )(4 .12 1 2 2 2 t 2 2 t i i + + + + + + + + = + 1 1 2 1 1 2 200 0 r l 150 0 r l 0e m lk u m s.l.iu u u u3 u u u p.l4 s p.1 s.s.i 31 uk u u = u u u p.16 s.s 1 . p s.s.s 21 uk u u = p.16 s.s 1 .p s.s.s 31 uk u u = u u u u u p.l9 s.p 1 . p8 s.p.s 31 uk uk u = 23 3 88 lg i p= 44 lg i p= 1 1 11 2 ln60 r h z= 13 31 13 ln60 d d z = 1 1 13 31 11 13 13 2 ln ln z z r h d d k = 12 21 1 1 23 32 13 31 1211 2313 3 .12 ln 2 ln lnln z+z z+z d d r h d d d d k + + = += 0 c g itopal.i 1)(k h h ukuuu p c w 0 08. 0 5 . 0l h u += += 0 c g i.mtop.ma.ml.i.m 1)(k h h ukuuu 2 1 1 t g i g t + = l r l l += t a tia.m h h aliru c0 c g t t a l.i.m 1)1 (ahk h h alk h h rku i + += 6 . 2 1 i a = 6 . 2 1 6 . 2 1 c 0 c g t t a i %50 1 h k h h l k h h rk u i + + = 9 . 3 86 lg t = ha p 35. 3 86 lg t = ha p i n 3l u e = mi n 2ll u e + = 100 %50 2 u i= )m(6 .1728 3 2 5 .19 g =h )m(66. 83 . 5 3 2 2 .12 c =h k0 2 22 25 89425 2716 390 1000 0114= + + = ln 26.262. ln . . . ka4 .63 6 . 2 66. 8 114. 0 66. 8 6 .17 1 26 4 .16 9 . 0143. 0 5 .19 4 .13 790. 0143. 01 700 1 = + + =i )ka(7 100 700 2 =i 0.83 100 3 .83 100 238. 0 19. 0 4 1 85. 0)6 .174(28. 0 = +=n 18. 1 100 3 .83 100 82. 0 19. 0 3 1 85. 0)6 .174(28. 0 = +=n )m(5 .247 3 2 1 .29 g =h )m(4 .1512 3 2 4 .23 c =h 237. 0 6 .11 6 .1149 ln 1000 5 . 5 5 .242 ln 3 .131 . 9 3 .139 .39 ln 7 . 11 . 9 7 . 19 .39 ln 22 22 22 22 22 0 = + + + + + + + =k 6 . 2 4 .15 237. 0 4 .15 5 .24 1 6 . 2 5 .14 88. 0296. 0 1 .29 6 .25 788. 0296. 01 1200 1 + + =i )ka(12 100 1200 2 =i 25. 0 100 1 .73 100 144. 0 056. 0 6 1 80. 0)5 .2446 .11(28. 0= +=n 43. 0 100 1 .73 100 5 . 0 056. 0 4 1 80. 0)5 .2446 .11(28. 0 = +=n )m(25.275 . 9 3 2 58.33 g =h )m(62.1712 3 2 62.25 c =h 223. 0 6 .18 6 .185 .54 ln 1000 5 . 5 25.272 ln 3 .2063. 9 3 .2087.44 ln 7 . 163. 9 7 . 187.44 ln 22 22 22 22 22 0 = + + + + + + + =k 6 . 2 62.17 223. 0 62.17 75.27 1 6 . 2 17 865. 0285. 0 34 30 7865. 0285. 01 2138 1 + + =i )ka(4 .21 100 2318 2 =i 081. 0 100 1 .57 100 112. 0 0098. 0 6 1 0 . 1)25.2746 .18(28. 0 = +=n 17. 0 100 1 .57 100 397. 0 0098. 0 4 1 0 . 1)25.2746 .18(28. 0 = +=n 42. 0 100 1 .57 100 397. 0 038. 0 4 1 0 . 1)25.2746 .18(28. 0 = +=n i izi u90 4 350 22 = i i s1 . 0 700 2 . 0190 2 = n 0n h u u = = u u uu eufd 22 1 )( 2 2 f 2 f f u0 u uu euuf d 2 0 2 0 2 0 2 1 d)( = = 0 s d 2 1 uupufp = uep u s d 2 1 2 1 2 2 1 2 f 2 0 f 0 + = uu 0 f u u k = += 0