|
个人理解为Ⅲ级即配电级
! h2 t, j) _% l: a, C
" c* Q& [4 d1 {, w6 t2 G0 g5 {Equipment of overvoltage category III is equipment in fixed installations and for cases where the reliability and the availability of the equipment is subject to special requirements./ M" t$ Z q8 C2 z ]
NOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation.
) {3 z2 D& h' k M) r- `5 q* i7 U9 a1 Y+ C" k$ _
Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation.0 d( q8 @3 r: a6 o1 m8 Q* [3 \
NOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads.
0 m3 D( l# ^; x( }1 YIf such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies. |
|