|
引用第40楼barry于2007-07-26 09:20发表的 :
$ ~ x$ v- C# Z' r- Z9 E% {
$ T) N6 L3 D% I# h% l: t( r
[7 `( \1 Q6 |ADAPTOR 适用于 Overvoltage category 2 ,
6 \# G, t4 o6 t/ ]
* L: J o6 {* n: u. `" h* c. a0 \: ?XDSL 不适用于电网的 Overvoltage category !!! * l$ G$ Y+ M4 z: f# O1 S
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if5 p+ }4 d+ \, \' M8 C
the PRIMARY CIRCUIT is Overvoltage Category II. 9 U$ {8 B) G; h5 }7 A1 ]; \
% F5 h; ?5 }/ m! c! W% M( ~% m( ~Transient overvoltage:
! j8 P, E, i5 s P' Y1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT% c. x t# l K+ e. T V% _
or a TNV-3 CIRCUIT; and
0 S9 B! M0 e& U" H7 d– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
7 w( l M, M# @& ior a TNV-2 CIRCUIT. |
|