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For working voltage 130V< V< 250V :
, |0 A3 O4 D! D* o$ H; B" {* R9 } 一 :between live part of different polarity :1,If protected against deposition of dirt : creepage distance : 2.0mm ; clearance : 2.0mm .2,If not protected against deposition of dirt : creepage distance : 3.0mm ; clearance : 2.5mm .3,if lacquered of enamelled windings:creepage distance : 2.0mm ; clearance : 2.0mm . 4, for positive temperature coefficient(PTC)resistors including their connecting wires,if protected against deposition of moisture or dirt :creepage distance : 1.0mm ; clearance : 1.0mm .
% y: |: X) J; x" a$ H0 I1 C: Y6 a 二 :between live part and other metal parts over basic insulation :1,If protected against deposition of dirt : (1)if of ceramic material ,pure mica and the like :creepage distance : 2.5mm ; clearance : 2.5mm .(2)if of other material :creepage distance : 3.0mm ; clearance : 2.5mm . 2,If not protected against deposition of dirt : creepage distance : 4.0mm ; clearance : 3.0mm .3,if the live parts are lacquared of enamalled winding : creepage distance : 2.0 mm ; clearance : 2.0mm .4,at the end of tubular sheathed type heating elements:creepage distance : 1.0 mm ; clearance : 1.0mm .0 [/ ~' K( ?. N- r; D) y: Z
三:between live part and other metal parts over reinforced insulation:9 I: N& t" {# u8 ~' X3 A: t$ Z
1,if the lave part are lacquered or enamelled windings or protected against deposition of dirt : creepage distance : 6.0 mm ; clearance : 6.0mm .
) A# ~' `1 Y8 v/ r* ?4 c7 u 2,for other live part not protected against deposition of dirt :creepage distance : 8.0 mm ; clearance : 8.0mm . |
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发表于 2008-9-10 09:47
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