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个人理解为Ⅲ级即配电级
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6 k8 B8 F7 o) Q6 CEquipment 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.$ B+ p6 G3 |8 @6 z: `! C$ }+ _
NOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation.4 P3 e* v! E) V5 N) L
, e+ G- O4 {5 R' H" ^Equipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation.% \- }4 S& r% r2 L2 l; u
NOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads., E* }: ]+ T2 U7 S) S: V7 T# B; G
If such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies. |
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