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protective extra-low voltage circuit" C, e" Y0 \; a
earthed circuit operating at safety extra-low voltage which is separated from other circuits' H3 V4 g. K. {" d+ V) L- }0 k- G
by basic insulation and protective screening, double insulation or reinforced insulation9 f; E( j( S6 ~2 ]6 u% n& x
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NOTE 1 Protective screening is the separation of circuits from live parts by means of an earthed screen.4 K/ v- D: B5 G( b. a
NOTE 2 A protective extra-low voltage circuit is also known as a PELV circuit.
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PELV电路与其它电路用基本绝缘和保护性屏障, 或双重/加强绝缘隔离开, 其中屏障应接地,以弥补基本绝缘的不足. |
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