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引用第40楼barry于2007-07-26 09:20发表的 :
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ADAPTOR 适用于 Overvoltage category 2 ,
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/ Y Z( g/ i6 R5 gXDSL 不适用于电网的 Overvoltage category !!!
0 q+ V2 }/ r7 S2 o7 x' |A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if
) R! Y* F7 L3 A+ zthe PRIMARY CIRCUIT is Overvoltage Category II. ) l& F9 f6 m0 y1 r
6 ?& n& A% ^- |( ]7 K0 ]+ mTransient overvoltage: 8 e" `; {5 s: r8 ^
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT
) V# C* s3 o* hor a TNV-3 CIRCUIT; and% Z. R9 t; s( O' X4 P. k
– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
6 y/ g8 l5 ~8 Q: }3 N) z, v4 Hor a TNV-2 CIRCUIT. |
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