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引用第4楼caballo3157于2009-05-25 16:47发表的 :1 k3 q. g# ~! h# S
如果是企业自己做试验,可以从三相电源的不同相上分别取电压,做洗衣机电源和耐压测试仪的初级电压。例如:取A相和中性线N为洗衣机电源,B相和C相给测试仪的高压变压器初级。 + {, B" w8 r$ i6 {
看来这里有点争议了,我把标准搬过来讨论下,看是否大家理解上有分歧呢?
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" ~, @7 s6 r9 iEN 60335-1 2002 Clause 13.3 The insulation is subjected to a voltage of substantially sinusoidal waveform having a frequency of 50 Hz or 60 Hz for 1 min. For single-phase appliances, the connections are shown in figure 5. Motors and three-phase appliances are tested immediately after the$ b8 E8 C# K8 C, X2 E
appliance has been disconnected from the supply.: y+ t0 ~2 k2 V8 d& L4 J
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这里只提到了马达和三项器具需要断电测试,是不是其他器具需要带电测试呢?( t1 f$ E9 T9 [3 }5 o% W
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我们再看下EN 60335-1:2002+A2:2006 Clause 13.3 The appliance is disconnected from the supply and the insulation is immediately subjected to a voltage having a frequency of 50Hz or 60Hz for 1 min, in accodance with IEC 61180-1;& w; H) {; j# G
5 S1 ]! Q( e& c) R, P4 Q; e这里有提到先断电测试,从今年7月开始必须使用A2版EN 60335,是不是就是要求断电测试耐压呢?' h* S" B& p, a/ z" L+ P! v
还是有其他决议?请指点 |
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