|
个人理解为Ⅲ级即配电级
! h8 [% x+ E! w0 D6 J! l# J4 N. L6 L: n
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.
0 K; ]4 M8 ~; R( ?* F) rNOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation.
4 S( f! U( |$ @; F) C
- @% n6 v: q2 p- `4 Q* q6 M& |Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation.% W8 N0 Y8 W0 H2 g) y P
NOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads.
$ }5 m& t. x r, C" s! }If such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies. |
|