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引用第40楼barry于2007-07-26 09:20发表的 :
$ t4 v9 P9 e, z/ _7 x1 J2 c+ |- b& @* q* ]1 V& e! P4 b
- z; c) _( Q; j, EADAPTOR 适用于 Overvoltage category 2 , \& B5 f* l% Q! [2 w
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XDSL 不适用于电网的 Overvoltage category !!! . K5 z0 Z% `: l. R3 N7 s
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if8 W8 v5 C& |/ z
the PRIMARY CIRCUIT is Overvoltage Category II.
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Transient overvoltage: # o( X( u7 `- @0 ]5 s
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT% {' d! R/ r; e% C
or a TNV-3 CIRCUIT; and4 l) T, F! g. m, v: {
– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
9 T, B9 E Z' h L9 W* Cor a TNV-2 CIRCUIT. |
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