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引用第40楼barry于2007-07-26 09:20发表的 :8 S4 I( u8 J# T! `+ F1 n
9 ]1 \" _1 h0 x( N
5 @+ D1 `; L1 Z6 X7 ~ADAPTOR 适用于 Overvoltage category 2 ,
% G/ R# R4 ?1 w4 m1 w& M5 |
0 P ^0 }0 M: |' {& TXDSL 不适用于电网的 Overvoltage category !!!
6 D' d" L& c: R4 a5 ~A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if: \ s; [1 B# y; b3 x: C
the PRIMARY CIRCUIT is Overvoltage Category II. ' M' t9 G' ~. J" F
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Transient overvoltage: 6 W/ U5 V" W. e7 k- c- ^9 V; Q& {0 R
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT
2 t X8 E) b% Z9 zor a TNV-3 CIRCUIT; and
0 I$ }1 p9 Y* L# H \, V+ c1 V– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
2 R+ H7 i$ N7 H0 v3 yor a TNV-2 CIRCUIT. |
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