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引用第40楼barry于2007-07-26 09:20发表的 :
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% S9 f W, x7 ^/ z2 HADAPTOR 适用于 Overvoltage category 2 ,
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XDSL 不适用于电网的 Overvoltage category !!!
+ y+ p c8 |& f! j; K$ Y; g( ?A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if, Y3 d. f1 v* f9 v& N1 B% F
the PRIMARY CIRCUIT is Overvoltage Category II. `7 y4 j& F' h- F7 B9 R
$ S( P9 p" V7 b8 ?2 [Transient overvoltage:
4 B) d3 l. i: Z" B1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT- h$ |. |4 c, p$ y: J9 I% A
or a TNV-3 CIRCUIT; and
$ \# E Q- `! D) }4 U4 h, D– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
2 x% A6 B6 S5 @. b# Bor a TNV-2 CIRCUIT. |
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