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引用第40楼barry于2007-07-26 09:20发表的 :# a) B( q" V" A# a9 y/ f
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ADAPTOR 适用于 Overvoltage category 2 ,- l( N3 i4 r3 o, g
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XDSL 不适用于电网的 Overvoltage category !!! * R% I$ K+ I1 z
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if R/ [2 q, E% g! \7 Z/ V
the PRIMARY CIRCUIT is Overvoltage Category II.
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# T/ v/ y, V6 z3 XTransient overvoltage:
( x# {! n4 a5 t7 @& ]1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT, i! T* r& l3 s% G. a+ f
or a TNV-3 CIRCUIT; and7 [# G5 w& B$ a# l0 t Q/ {
– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT' s: M! U6 S$ C {3 K* m
or a TNV-2 CIRCUIT. |
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