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protective extra-low voltage circuit" e0 z+ W7 H. d
earthed circuit operating at safety extra-low voltage which is separated from other circuits
6 @6 d6 W! N. X% Q h. d; bby basic insulation and protective screening, double insulation or reinforced insulation+ [* D$ \. q) C) a2 l2 ^
6 r% v3 R! g) S% _9 O) k) @; |NOTE 1 Protective screening is the separation of circuits from live parts by means of an earthed screen.4 I9 ^# n; f2 }6 E! } X
NOTE 2 A protective extra-low voltage circuit is also known as a PELV circuit. _! p8 e& K" x
( C j. y% r- L( GPELV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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