一款三相电输入的产品,金属外壳, Y型连接,三相四线制的(没有零线) 额定电压输入400-500Vac 线电压288V,按此过压类别属于二类吗?这又与抗电强度测试有什么相关联系? 例如输入到输出,输入到地耐压值分别多少? 0 s3 X, {! I# E
It ispermitted to use either the requirements of 2.10.3 for Overvoltage Category I or; ?- q. F# [: _) `( p Overvoltage Category II, using the PEAK WORKING VOLTAGE; orthe requirements in Annex G for, L# \& |0 x2 k4 a! f4 S& U* l# `" j f
Overvoltage Category I, Overvoltage Category II, OvervoltageCategory III or Overvoltage) _' {. p) R# U4 `5 R
4 h1 U7 R" ^- |Category IV, using the REQUIRED WITHSTAND VOLTAGE, for aparticular component or6 i0 t(?" s. k b5 ^! p9 x# Y
: q! g6 E2 w* ]8 D: @ k0 Qsubassembly or for the whole equipment.
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. [$ t+ R0 y( Q0 {/ z9 u* jFor equipment to be supplied from an AC MAINS SUPPLY, thevalue of the MAINS TRANSIENT
) x I u5 m, O+ Y+ q* UVOLTAGE depends on the Overvoltage Category and the AC MAINSSUPPLY voltage. In general,
( j) u U8 g* v+ J( R3 H) f0 J. JCLEARANCES in equipment intended to be connected to the ACMAINS SUPPLY shall be ! v' J, K" F$ C' B7 `$ ^
( ^( p4 c6 n# ]designed for Overvoltage Category II.
3 f6 i& D( t, X D" W--此部分摘自IEC60950
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220/380V 三相系统各种设备耐冲击过电压额定值 + X& R5 h! H$ H' Z. H" ]
设备的位置电源处的设备配电线路和最后分支线路的设备用电设备特殊需要保护的设备 Ⅰ类──需要将瞬态过电压限制到特定水平的设备; Ⅱ类──如家用电器、手提工具和类似负荷; Ⅲ类──如配电盘,断路器,包括电缆、母线、分线盒、开关、插座的布线系统,以及应用于工业的设备和永久接至固定装置的固定安装的电动机等一些其他设备; Ⅳ类──如电气计量仪表、一次线过流保护设备、波纹控制设备
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IEC60664-1对该类结构的分类 : {$ A `9 G( N$ g7 ]* o
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