|
引用第40楼barry于2007-07-26 09:20发表的 :4 _, p7 I8 e) r( u7 e
7 T2 M$ D8 \( \# d) C. ]0 `( F: l, A9 A) | d- N
ADAPTOR 适用于 Overvoltage category 2 ,
: K& G( t2 I6 O ~ m% L+ Z
2 G8 b; E2 C; B/ [9 x4 ^8 Z) MXDSL 不适用于电网的 Overvoltage category !!!
Y& }+ b3 V% Y8 d5 s# G$ G( n0 lA SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if
* u: H$ p* O# o9 ]the PRIMARY CIRCUIT is Overvoltage Category II. 2 z$ d" k. |# [
$ b5 v4 O! i6 r5 w% `2 g7 eTransient overvoltage: & _* V% ?. b2 U
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT) C( b$ Y7 m- E* \, U
or a TNV-3 CIRCUIT; and( y6 X- L9 w; I" L5 Z6 s4 q* @
– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT" Z, b% ]7 s7 b. b1 Z# R( ?
or a TNV-2 CIRCUIT. |
|