Kyoritsu 6305 Instruction Manual Manuel d'utilisateur télécharger pdf (Page 5)

KEW6305

O Measurement Category

To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for

various electrical environments, categorized as O to CAT.IV, and called measurement categories.

Higher-numbered categories correspond to electrical environments with greater momentary

energy,

so a measuring instrument designed for CAT.III environments can endure greater momentary

energy

than one designed for CAT.II.

O : Circuits which are not directly connected to the mains power supply.

CAT.II : Electrical circuits of equipment connected to an AC electrical outlet by a power cord.

CAT.III : Primary electrical circuits of the equipment connected directly to the distribution panel,

and feeders from the distribution panel to outlets.

CAT.IV : The circuit from the service drop to the service entrance, and to the power meter and

primary overcurrent protection device (distribution panel).

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Kyoritsu 6305 Instruction Manual Manuel d'utilisateur Page 5