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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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XDSL 不适用于电网的 Overvoltage category !!!
& Y1 y6 `7 d0 @/ @2 H6 EA SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if
; u# l% m' x( Z! r3 xthe PRIMARY CIRCUIT is Overvoltage Category II. 1 a0 f; c. O0 ?# s9 f% S
- E0 ]8 B4 h5 d7 E9 jTransient overvoltage:
% \% s8 t4 o; [1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT7 X$ c+ s& q! N/ n$ ]- B
or a TNV-3 CIRCUIT; and
% Y" n A, e' v6 A0 w- J– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT8 b. B9 ?" G8 V0 X+ x# F
or a TNV-2 CIRCUIT. |
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