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引用第40楼barry于2007-07-26 09:20发表的 :" ` m8 x6 A! a( J; ], C& G3 \* L
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7 u) l1 u+ g1 t2 tADAPTOR 适用于 Overvoltage category 2 ,- M( c; n# G7 b% k$ p) S
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XDSL 不适用于电网的 Overvoltage category !!! # R3 I/ W& K" w5 o& \2 Y
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if0 w& u3 f, c2 O. f3 e& M
the PRIMARY CIRCUIT is Overvoltage Category II.
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, J% |! _1 z* F. `* ]* j. [Transient overvoltage:
: @ [& @% i+ E- J2 n/ H7 f1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT
+ |/ f: K- e, ~3 j) {4 h( Sor a TNV-3 CIRCUIT; and
l+ @0 ?: q8 r; k5 r9 Q2 P5 Y5 n– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT+ e1 \# x" W- U# R. \8 c
or a TNV-2 CIRCUIT. |
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