Yokogawa EJA110A Manuel d'utilisateur télécharger pdf (Page 20)

IM 01C21B01-01E

2-12

2. HANDLING CAUTIONS

2.12Low Voltage Directive

Applicable standard : EN61010-1

(1) Pollution Degree 2

"Pollution degree" describes the degree to which a

soild, liquid, or gas which deteriorates dielectric

strength or surface resistivity is adhering. " 2 "

applies to normal indoor atmosphere. Normally,

only non-conductive pollution occurs. Occasionally,

however, temporary conductivity caused by

condenstaion must be expected.

(2) Installation Category I

"Overvoltage category(Installation category)"

describes a number which defines a transient

overvoltage condition. It implies the regulattion for

impulse withstand voltage. " I " applies to electrical

equipment which is supplied from the circuit when

appropriate transient overvoltage control means

(interfaces) are provided.

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Yokogawa EJA110A Manuel d'utilisateur Page 20