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引用第40楼barry于2007-07-26 09:20发表的 :
$ ?8 `; M& m S3 U- W! e" c( \6 A5 L1 z+ J$ `
& j1 q- O6 `. G$ I( H! m7 kADAPTOR 适用于 Overvoltage category 2 ,
4 _% m1 w0 _5 C' ]6 W7 U
! R: M; G8 g, `XDSL 不适用于电网的 Overvoltage category !!! ! |( o" u+ S8 `6 G! I3 p6 E) ]: C% F
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if8 b! Z! W2 p* p! `" o! S
the PRIMARY CIRCUIT is Overvoltage Category II.
$ L8 v( S/ |, c' g9 ?( X, D* U/ m. O" W+ g
Transient overvoltage: ; M. G7 D7 v- R6 b. c
1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT9 M& z/ j3 `5 D( K2 ?- M
or a TNV-3 CIRCUIT; and
1 u$ U( q# ~) @0 y2 P5 e% L. [4 {– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT1 p- R% J# C' H) E
or a TNV-2 CIRCUIT. |
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