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引用第40楼barry于2007-07-26 09:20发表的 :+ X+ r- g. L3 c5 o# `0 m
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ADAPTOR 适用于 Overvoltage category 2 ,; n4 ^9 @' `& r
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XDSL 不适用于电网的 Overvoltage category !!! 0 f; {4 U+ n3 M* [7 f
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if7 t( i: ?! f+ p' i! ~2 _/ m0 }' n
the PRIMARY CIRCUIT is Overvoltage Category II. u1 ^# S7 g7 F- m4 p" ?" [
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Transient overvoltage: 6 n, ~ z5 c# k4 G5 d
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT, j( O5 N7 Y4 p
or a TNV-3 CIRCUIT; and
6 `: e3 j ]; t% \+ L, k6 C! J– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
) j6 ?% K: l, C# @ {0 D; Oor a TNV-2 CIRCUIT. |
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