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引用第40楼barry于2007-07-26 09:20发表的 :3 r& ]) J! M" F5 {8 E9 G( U
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/ X( A8 M0 s8 u$ m w( \ADAPTOR 适用于 Overvoltage category 2 ,: E; z$ F6 O6 z2 h4 s, h T$ R
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XDSL 不适用于电网的 Overvoltage category !!! ( R! U& c" H, l* B2 Z$ e
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if
6 ?$ ?/ P- a- W2 H- h3 X7 }the PRIMARY CIRCUIT is Overvoltage Category II. + J3 k/ H/ z+ x* ?& ?. q
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Transient overvoltage: / D/ t; o3 P0 G" `! e
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT
& Y: q) _* J! p0 d9 b t- z( l9 qor a TNV-3 CIRCUIT; and; s' B+ H3 t, l3 ~; N2 s/ x+ T% r
– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT+ H2 D4 a# V$ N& Y7 e t
or a TNV-2 CIRCUIT. |
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