|
个人理解为Ⅲ级即配电级' @ i3 Y- N" K8 z4 P
: v. {& ]# s+ Z: I/ EEquipment 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.
/ N" R% Q. c$ G8 g1 |" ^. RNOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation.3 t9 R$ z A/ L a$ z, W
* e0 N: ^; Z7 z& W7 m8 P/ E
Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation.
( M! j% Y0 @8 H2 |1 tNOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads.+ E% E1 X& d6 \9 g! z, X8 t+ A
If such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies. |
|