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protective extra-low voltage circuit- [- h" p3 I; f1 Z3 e+ W8 }" ^# D
earthed circuit operating at safety extra-low voltage which is separated from other circuits
7 y* C7 g. B) p- h+ l! e, `! X4 Pby basic insulation and protective screening, double insulation or reinforced insulation/ t; U6 W" f- W; Y
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NOTE 1 Protective screening is the separation of circuits from live parts by means of an earthed screen.
`% p7 r* f8 W% r" jNOTE 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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