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引用第40楼barry于2007-07-26 09:20发表的 :" `2 c/ ~2 ^; X) @+ l0 Y! a
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ADAPTOR 适用于 Overvoltage category 2 ,
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/ a4 a3 B1 s& v3 SXDSL 不适用于电网的 Overvoltage category !!! ( o0 v& K; h! e$ T) ~8 M
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if
( J# q4 k# `" Y; W: S6 f* J! A4 Athe PRIMARY CIRCUIT is Overvoltage Category II. ; q" P6 o( c0 l
6 y: ` h6 n d# _* C9 T4 dTransient overvoltage:
1 k& d: G# n# a& r! \; c1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT9 ^+ k. b% M0 U+ ]& w9 N
or a TNV-3 CIRCUIT; and
2 A) t+ z: T; {# k4 m– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
' ~0 h; s, N9 H& y4 t+ r6 @or a TNV-2 CIRCUIT. |
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