1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS C IEC 60076 5 5: KS C IEC 60076 5: 2008 2008 3 31 http:/www.kats.go.krKS C IEC 60076 5: 2008 : () ( ) () ( ) : (http:/www.standard.go.kr) : :2002 10 29 :2008 3 31 20080134 : : ( 025097 294) (http:/www.kats.go.kr). 10 5 , . KS C IEC 60076 5: 2008 .1 1 1 2
2、1 3 .1 4 5 A( ) 15 B( ) .27 i KS C IEC 60076 5: 2008 5: Power transformers Part 5: Ability to withstand short circuit 2006 3 IEC 60076 5, Power transformers Part 5: Ability to withstand short circuit , . 1 . . KS C IEC 60076 1 . 2 . . ( ) . KS C IEC 60076 1: 2002, 1: KS C IEC 60076 3: 2002, 3: , KS
3、C IEC 60076 8: 2002, 8: KS C IEC 60076 11: 2008, 11: 3 3.1 3.2 . 3 2 . “ ” . 3.2 3.2.1 3.2.1.1 KS C IEC 60076 5: 2008 , , . . (3.2.6 ) ( ) 3.2.1.2 , . . 3.2.2 2 3.2.2.1 3 3 . I: 25 2 500 kVA II: 2 501 100 000 kVA III: 100 000 kVA 3.2.2.2 , (r.m.s. 4.1.2 ) . I 5 % , . 4.2.3 . 3.2.2.3 1 . . 2 KS C IEC
4、 60076 5: 2008 1 2 kVA %25 630 4.0631 1 250 5.0 1 251 2 500 6.0 2 501 6 300 7.0 6 301 25 000 8.0 25 001 40 000 10.0 40 001 63 000 11.0 63 001 100 000 12.5 100 000 12.5 1 100 000 kVA . 2 3 3 . 3.2.2.4 . 2 . 2 MVA , UmkV 7.2, 12, 17.5, 24 500 500 36 1 000 1 500 52, 72.5 3 000 5 000 100, 123 6 000 15 0
5、00 145, 170 10 000 15 000 245 20 000 25 000 300 30 000 30 000 362 35 000 35 000 420 40 000 40 000 525 60 000 60 000 765 83 500 83 500 1 3 . 3.2.2.5 2 , 3 ( 3.2.5 ). , 3 3 KS C IEC 60076 5: 2008 . , 3 . 3 . . 3.2.3 2 , . . , (KS C IEC 60076 8 ). ( ) . 3 . 3 , , . . , . . 3.2.4 . . / , . 3.2.5 , , . 2
6、 . , . 3.2.6 ( ) ( ) 4 KS C IEC 60076 5: 2008 . . 3.2.7 . . 3.2.8 . 4 KS C IEC 60076 1 KS C IEC 60076 11 . 4.1 4.1.1 . 4.1.2 4.1.5 . 4.1.2 I 2 3 , I . )(3stZZUI+= (kA) (1) Zs: SUZ2ss= 1 ( ). (2) Us: (kV) S : (MVA) U Zt . a) U Ur kV , Zt . 5 KS C IEC 60076 5: 2008 r2rtt100 SUzZ= 1 () ( )1). (3) zt: ,
7、 , Sr: MVA b) U : , 2) kV Zt: 2 , , 3.2.3, 3.2.4 3.2.5 . 3.2.2.2 , . 1 3 . . 4.1.3 I 2 . 25 2 . 4.1.4 4.1.2 4.1.3 I 1 3 . (4) (5) 0 . , 0 . 1) Zt zt 4.2.3 KS C IEC 60076 1 Z z . 2) KS C IEC 60076 1 5.2 6 KS C IEC 60076 5: 2008 3 ( ) 105(A) 250 200105(A) 180 180120(E) 250 200 130(B) 350 200155(F) 350
8、 200180(H) 350 200 200 350 200 220 350 200 1 , . 2 A . 4.1.5 1 1 . 1000106)235(22001+=tJ (4) 170045)225(22001+=tJ (5) 0: ( ) J : , (A/mm2) t : (sec) (4) (5) , 10 . . 100 (J/kg ) 398.4 928100 (kg/m3) 8 894 2 685100 ( m) 0.022 4 0.035 54.2 4.2.1 . 7 KS C IEC 60076 5: 2008 . , (KS C IEC 60076 1 3.11.3
9、). 4.2.2 4.2.7 . . . , . , . A . 4.2.2 4.2.2.1 , . . ( ) . 4.2.2.2 KS C IEC 60076 1 . . , . 0.2 % . (routine test) . 4.2.2.3 10 40 (KS C IEC 60076 1 10.1 ). . I . 4.2.3 2 . . 2= kIi (6) I 4.1.2 . k , 2 2 . 2k X/R . 8 KS C IEC 60076 5: 2008 X : (Xt Xs) , R : (Rt Rs) , , Rt (KS C IEC 60076 1 ). , X/R
10、X/R . 4 X/R 3). 4 2k X/R 1 1.5 2 3 4 5 6 8 10 14 2k 1.51 1.64 1.76 1.95 2.09 2.19 2.27 2.38 2.46 2.55 1 14 X/R 2k . Zs 0.05 Zt ( ) Xt Rt xt rt . xt: zt (%) rt: zt (%) zt: (%) X/R 14 , 2k . II : 55.228.1 = III : 69.229.1 = 4.2.4 I (4.1.2 ). 5 % , 10 % . 4.2.5 2 4.2.5.1 4.2.4 . ( ) ( )4). 3) 4 . 2sin)
11、(e12/)2/(+=+ XRk e : : arctan X/R 4) 2 2 . 2 , . , . 9 KS C IEC 60076 5: 2008 , 1.15 . , . . . . . . . I , X/R , . 4.2.5.2 (4.2.3 ) . I . 1 “0” . 1 “0” . k . 3 “0” . k . k . 2 . . 2 I xt/rt3(4.2.3 ) , 3 . . 4.2.5.3 . , 50 Hz 60 Hz 4.2.3 4.2.4 60 Hz 50 Hz . . 4.2.5.4 3 4.2.4 3 . . , 3 . 10 KS C IEC 60076 5: 2008 1 , . 3 2/3 . 3 2 1 2 . Zs: S : 1 Y Zs: S : 2 Y Y 1 II III , I . 2 . 3 , . , . 4.2.5.5 3 , , 70 % . I II 3 . 3