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个人理解为Ⅲ级即配电级
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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.
6 t7 U/ M/ a) e/ k& sNOTE 2 Examples of such equipment are switches in the fixed installation and equipment for industrial use with permanent connection to the fixed installation.; e) Z* D9 i0 H( I7 n k$ A1 E3 Q4 T
3 D& W1 j0 b/ N5 D; fEquipment of overvoltage category II is energy consuming equipment to be supplied from the fixed installation.
+ {1 j+ h* F5 F6 x+ cNOTE 3 Examples of such equipment are appliances, portable tools and other household and similar loads.
. E- e6 q- S6 a& o# C9 H6 _* Z; kIf such equipment is subjected to special requirements with regard to reliability and availability, overvoltage category III applies. |
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