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l(f)ڣ[2006-2-13]    [6748]ΡЇ늚ЈُW(wng)[EM39.com]{pԄӝL}
      ϢԴЇԄӻW(wng)

TNϵy(tng)ӵعϱoõķʽ
1^oܝMҪr˲^ӵرo
220VTNϵy(tng)oДϾ·ĕrg(yng)ϣ
늾·ֻo̶O(sh)ĩ·T(yng)С5
늽oʽƄʽO(sh)ĩ·T(yng)С0.4
2ľϵy(tng)^oܝMoܝM˲^o
3lMr(yng)©o

P(gun)ڲ·oӋ

Ӌl
늉U e=220V
O(sh)Ӌ·BV-2*2.5(do)BVR-1*2.5PEãR0=8.7W/KM X0=0.127W/KM
O(sh)Ӌƽ늾x50·L=100; ··xC65͔·ȡ|Rz=1.3W;

Ӌ㹫ʽ
Id = U e / Zxl
ʽ U e~·늉
Zxlƞ·迹


1ӋZxl
Zxl=̣0.0013+100*0.00872+100*0.0001272
= 0.759+0.00016
=0.871W
2ӋӵعId TNϵy(tng)

Id = U e / Zxl=220/0.871=253A

(j)ʩ͵C65΢͔·2ͣ··~4-7r˲r
O(sh)ӋõIJ··C65-10A/1PIe=10A;
ˆӵعĄ(sh)飺
m= Id / Ie =253/10 =25.3() ɱC˲rlrgt=0.02룬ȫMҎ(gu)Ҫ

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