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引用第40楼barry于2007-07-26 09:20发表的 :2 f) y: K5 _9 _' S" K$ M, x7 }
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: j' B) p; t5 B* ]* ^ADAPTOR 适用于 Overvoltage category 2 ,' ? d+ R, q4 X$ {
. Y1 Y ?/ l. m- ~6 g6 `XDSL 不适用于电网的 Overvoltage category !!! , ?: \- }! Y) o5 k8 E- J
A SECONDARY CIRCUIT derived from an AC MAINS SUPPLY will normally be Overvoltage Category I if8 o! W Y; H2 }1 w
the PRIMARY CIRCUIT is Overvoltage Category II. 0 W' k1 I" y% P2 ]( X# q6 U
O; j3 @$ T: q# f; kTransient overvoltage:
9 A4 o+ Q- b- T- V( q1 500 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is a TNV-1 CIRCUIT
( S5 K6 T/ K7 ^or a TNV-3 CIRCUIT; and
8 P1 r1 t2 ^. z– 800 Vpeak if the circuit connected to the TELECOMMUNICATION NETWORK is an SELV CIRCUIT$ K7 Z& P; P0 ^' Q" M, o
or a TNV-2 CIRCUIT. |
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