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引用第40楼barry于2007-07-26 09:20发表的 :; o- c/ d6 q$ s B5 Q
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ADAPTOR 适用于 Overvoltage category 2 ,7 C) \$ q6 Y; L! L b6 e
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XDSL 不适用于电网的 Overvoltage category !!! 5 y1 C, j* g% W, a
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if# u# P3 z0 q3 N$ |
the PRIMARY CIRCUIT is Overvoltage Category II.
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5 E# C9 h! g' m9 N8 D3 ^7 QTransient overvoltage:
( L9 D# C3 l0 L4 j- F) O" x) U* s; j1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT; T: Z" x- `+ v: b: l. K
or a TNV-3 CIRCUIT; and1 f% p' ?% d2 g8 Q$ H6 a
– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT
5 T1 X1 N3 q. X! oor a TNV-2 CIRCUIT. |
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