1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS , D % , D 1999 2 25 L % KS C 0298 d D ( W D d KS C 0298: 1999 (2004 K ) IEC 72123! 1987 C 0298! 1999 y W % , D $ z z J $ ( % b ) . . ( $ ) d J y W . ICS 19.040 z KS d D(W D d C 0298! 1999(2004 K ) (IEC 72123! 1987) Classification of environmental conditions
2、 Part 2! Environmental conditions appearing in nature Air pressure I z 7 1987 1 x 5 ; IEC 721 2 3(Classification of environmental conditions Part 2!Environmental conditions appearing in nature. Air pressure) 8 , x r z D 8 X z I . I z ( | ) 8 7 z I . x $ I z 7 W a a ? D G D G 8 . x D z 8 x z G 5 , a
3、x K D j 8 D( S . x D z 8 , z D G 7 KS C 0278 G 8 . Kz : a r z 7 I z K= 5 D I z D L3 . I Kz 7 m ( x 8 x . 5 KS C 0278 d D( u z D(7 IEC 721 1! 1990 Classification of environmental conditions Part 1! Environmental parameters and their severities L . x I , y: D 3 j 8 x 5 . L 7 D a 8 . b 7 : M . n 7 v 7
4、b D n 7 7 : M 7 a 8 . P 5 D S D r : S D u ( n 7 ; x x D 9 D y D D z r 7 D w n E , y a y D b D I 2 X b y D d v L y D z r 7 , D y z D D ( u D ). D ( y( D , / D E ( 100mm 200mm $ D W v D / I 0.7 K 3000m D ( = , I 30% E v ( % 7 12% S . I 2 , d I “ 7 j 2 v , d C; K ( % I L f S .) x 5 ( D D D , 3 v d D ,
5、. , D 7 W D I D X a D 7 7 x _ 3 . DG v D D G 7 101.325kPa I . C 0298! 1999 2 v D 7 d n 0 , G D 91% 107% D $ . v D 2 n2 D ( I $ S . v 7 D 7 v D n , v n 7 ( W D I D X ) D 7 v D . ( D D G 8 X3 ? 3 : a t . v v D( ( m kPa 30 000 25 000 20 000 15 000 10 000 8 000 6 000 5 000 4 000 3 000 2 000 1 000 0 400
6、1 000 2 000 1.2 2.5 5.5 12.0 26.4 35.6 47.2 54.0 61.6 70.1 79.5 89.9 v 101.3 106.2 113.9 127.8 : m ( = G 7 D 8 BY K L K L & 2 x2 ( * u V BY ( & I D2 BY J J ( x L & =l BY R & 2 BY y i y & , b2 BY y y y & y2 BY yi &( L2 BY i i 9 &2 i % BY & 2 BY ( & &2 BY & P2 BY ( D & D 2 ( =l (031)829 81824 Fax. (031)829 8185KS C 0298 : 1999 (2004 K ) (IEC 721-2-3! 1987) Classification of environmental conditions Part 2! Environmental conditions appearing in nature Air pressure ICS 19.040 KSKSKSSKSKS KSKS SKS KSKS SKSKS KSKSKS ,03&“/45“/%“3 %4“440$*“5*0/
