1、KS C 0281 KSKSKSKSSKSKSKS KSKSKS SKSKS KSKS SKS KS - ( ) KS C 0281:1997 (IEC 721-2-2: 1988) (2007 ) 1997 10 30 http:/www.kats.go.kr : ( ) ( ) : (http:/www.standard.go.kr) ： : 1997 10 30 : 2007 10 30 2007- 0887 ： ( 02)503-7949 ) (http:/www.kats.go.kr). 7 5 , . ICS 19.040 KS - C 0281 - 1997 ( ) (IEC 7
2、21-2-2 : 1988) (2007 ) Classification of environmental conditions Part 2 : Environmental conditions appearing in nature Precipitation and wind 1. ( .) , . . KS C 0278 . KS C 0278 IEC 721-1 : 1990 Classification of environmental conditions Part 1 : Environmental parameters and their severities . 2. ,
3、 . 3. , , . , , . . . , , . 20 17.3g/m3 0 4.8g/m3 . 3.1 , , . 0 . 0, 0 . 0 13 . 50 . , , . , , . . ( 1 ). 5mm 6mm 9m/s . . 5mm 6mm . 0 . C 0281 - 1997 . , . 0 . . . 140mm (Coffeyville, Kansas, 1970 9 3 ) . 0 . (snowflakes) . 1cm . 3.2 , . , . . . . . . 2 3 . . 80m/s . 125m/s . 4. 4.1 . - mm/h ( ) -
4、- - , , . 1 . 2 C 0281 - 1997 (1) IEC 721-3 . (2) 1mm/h . IEC 721-3 KS C 0280( - ) IEC 721-3-0 : 1984 Classification of environmental condition Part 3 : Classification of groups of environmental parameters and their severities Introduction 6. A . , , , . 4.2 . - - - - . . 900kg/m3. . V : (m/s) d : (
5、mm) (, ) . 20mm 2 . . 3 dV 16.5=C 0281 - 1997 4.3 mm , . , 80 m 20 m . . 70kg/m3 150kg/m3 200kg/m3 400kg/m3. 4.4 . . . 3 . 5. , , . . 5.1 , . . 1 30mm . 30 . . . . . , ( 2 ). 5.2 . , . . 1 130m/h 30m/s . 1 1 , 20mm , 10mm . 5.3 0 ( .) . 75mm . 5.3.1 0 , . 5.3.2 . , . 4 C 0281 - 1997 . 30mm/h 30cm .
6、, . 150mm, 100m 500mm . 200kg/m3. 5.3.3 . , , . . , . . 5.3.4 . , . 5.3.5 . - - - - 3 4 , . . - - - , ( 5 ). 5.4 20mm 50mm . 5.5 ( . ) . 2kPa 2m , 0.7m . 10 . 5.6 . . . 4 . 5 C 0281 - 1997 5.7 . . F : (N) V : (m/s) A : (m2) . , . 1Hz . 2 . . . f : (Hz) V : (m/s) d : (m) 6 AVF265.0=dVf 195.0=C 0281 -
7、 1997 - - 7 KS C 0281 - 1997 (IEC 721-2-2 : 1988) - ( ) . 1. IEC 721 , . . IEC 106 (IEC Guide 106 : Guide for spe cifying environmental conditions for equipment performance rating, 1989.5) . IEC 721 KS 1 . IEC 721 2 “ “ 721-2-2 “ “ , , , . , . 1 8 C 0281 - 1997 , 3 . 2. , , , , , , . . 2 . - - 9 - (
8、 ) 135513 7017 (02)60094567 (02)6009 4887 8 http:/ KS C 0281:1997 (IEC 721-2-2: 1988) KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Classification of environmental conditions Part 2 : Environmental conditions appearing in nature Precipitation and wind ICS 19.040 Korean Agency for Technology and Standards http:/www.kats.go.kr
