|
It is permitted to use either the requirements of 2.10.3 for Overvoltage Category I or* I3 z8 [& B7 C* `9 {! S7 {
Overvoltage Category II, using the PEAK WORKING VOLTAGE; or the requirements in Annex G for
4 H5 F& A4 u x) [; V" R5 t& ]Overvoltage Category I, Overvoltage Category II, Overvoltage Category III or Overvoltage
; c7 ?" t9 y, B/ H$ I# ZCategory IV, using the REQUIRED WITHSTAND VOLTAGE, for a particular component or
( ]/ {( T$ y5 [. Vsubassembly or for the whole equipment.! b" O: S* a- B; P
' B o; v: I: \+ U
For equipment to be supplied from an AC MAINS SUPPLY, the value of the MAINS TRANSIENT: K8 T6 U, R o* b
VOLTAGE depends on the Overvoltage Category and the AC MAINS SUPPLY voltage. In general,& _* ^5 Q0 _8 _
CLEARANCES in equipment intended to be connected to the AC MAINS SUPPLY shall be ; ~/ J3 I5 m. n) g
designed for Overvoltage Category II.9 p7 H) f9 W& L+ I
+ r4 G" t, e. Z }' z, {$ H a' P从第一段里可以看到过压等级分成了四个等级,而第二段只说接交流电的为过压等级二,那其它的是怎么判断的啊?哪位大侠知道,指点指点,万分感谢。 |
|