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It is permitted to use either the requirements of 2.10.3 for Overvoltage Category I or8 r0 V& ~7 z2 N9 J _& ^1 L3 Q
Overvoltage Category II, using the PEAK WORKING VOLTAGE; or the requirements in Annex G for
. k0 H1 E2 b7 u" H% t( Y( q5 `Overvoltage Category I, Overvoltage Category II, Overvoltage Category III or Overvoltage
# \' i( A+ [5 y+ WCategory IV, using the REQUIRED WITHSTAND VOLTAGE, for a particular component or
8 X3 L3 L* y. u$ I: Ksubassembly or for the whole equipment.
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! v( n1 f7 v! Q ?" |- lFor equipment to be supplied from an AC MAINS SUPPLY, the value of the MAINS TRANSIENT2 I: `" F: L" E! w
VOLTAGE depends on the Overvoltage Category and the AC MAINS SUPPLY voltage. In general, W1 f7 \/ \2 B
CLEARANCES in equipment intended to be connected to the AC MAINS SUPPLY shall be
; s# i" c* C0 o/ v! ~designed for Overvoltage Category II.
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1 c; M" O) y ~% {& ]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。 |
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