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楼主 |
发表于 2010-6-12 08:57
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If the result of the TOUCH CURRENT measurement on any of the above equipments exceeds
2 }+ o [3 B; g% A) h+ b3,5 mA r.m.s., the following requirements a) and b) apply, and also, if relevant, those in }' @) i2 \% b D0 _
5.1.7.2.
- X/ b; c3 ?% x1 z+ B# Za) The r.m.s. PROTECTIVE CONDUCTOR CURRENT shall not exceed 5 % of the input current per8 m* h& f: b; G8 `" S0 I
line under normal operating conditions. If the load is unbalanced, the largest of the three8 K/ ]) @9 m$ M. q' l( [
line currents shall be used for this calculation.To measure the PROTECTIVE CONDUCTOR CURRENT, the procedure for measuring TOUCH CURRENT is used but the measuring instrument is replaced by an ammeter of negligible
9 d0 c+ s8 j, d& uimpedance; and ; G& Y: D3 E; b% K
b) one of the following labels, or a label with similar wording, shall be affixed adjacent to the
5 ?/ ~( B1 v# Nequipment AC MAINS SUPPLY connection:9 c: S3 H( [% q/ n# b+ k
WARNING HIGH LEAKAGE CURRENT EARTH CONNECTION ESSENTIAL BEFORE CONNECTING SUPPLY WARNING
% k7 F$ `) l7 }7 c- c4 I. EHIGH TOUCH CURRENT EARTH CONNECTION ESSENTIAL BEFORE CONNECTING SUPPLY
' q0 p O) e: I& WCompliance is checked by inspection and measurement. |
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