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引用第12楼artscan于2009-03-11 16:42发表的 :
5 y, {1 T/ b. r2 s一般是按照实际工作电压来算啊,不过确实这个地方是有不同意见的......" z) O2 n( {8 B3 L# H; l
灌封没有意义的...
57.9.4Construction f).
1 b% g. j; Z, y- a* o) V5 r NCREEPAGE DISTANCES within moulded transformers are considered not to exist if it can1 U; l) ^0 U' M, k8 b
be shown that no gas bubbles are present and the thickness of the insulation between# Q- C" e: k# G( ^
enamelled or lacquered primary and secondary windings is at least 1 mm for reference1 l8 B, {/ Q- U' G( O
voltages U not exceeding 250 V and increased proportionally for higher reference
& w2 c) `3 {2 P) ^1 `3 U svoltages.# g6 L) W; S8 |+ D
如何能保证无气泡灌注是一门工艺, 似乎拍X光片检查比自己动手剧开要省力的多. # P3 _# d: W$ q8 o8 P* r# q
' j% c3 X& E0 p2 z6 C. ~. g4 a对于初次级之间的爬电距离, 变压器内部无可厚非一般是按有效值来计算,
% j3 r8 u( K: I4 C& L& G4 cif Reference Vr.m.s of pri. & sec. < Vin+Vout, Cr.=8* p# P, D" O4 n! Y8 o" T
else, if Reference Vr.m.s of pri. & sec. > Vin+Vout, Cr.= 8 + x(linear calculated out from Table 16.)
# M8 B& J0 m7 j+ X' O E6 E; A" J# I6 S* }- ~
Humble opinion only... |
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发表于 2009-3-2 11:43
