西门子6ES7322-1BH01-0AA0

6ES7322-1BH01-0AA0

联结方式在油箱壁等部件会产生涡流，引起附加损耗，并引起局部发热，所以国家标准GB1094规定Yyn0联结变压器的容量不得超过1600KVA。Dyn11联结变压器在这一方面优于Yyn0联结变压器，其高压绕组D联结使得涡流和磁通密度不可能太大，因而附件损耗很小，也不会出现局部过热问题。

【3】抑制谐波能力：

对于Yyn0联结变压器，来自低压电网的谐波电流，其含量很大的三次谐波分量会在变压器中产生三次谐波磁通，三次谐波磁通将在高压绕组中感应出三次谐波电动势。

对于Dyn11联结变压器，D联结对抑制谐波的恶劣影响有很大的作用。一方面在D联结绕组中的三次谐波环流能够在变压器中产生三次谐波磁动势，它与低压绕组的三次谐波磁动势平衡抵消，另外方面，高压相绕组的三次谐波电动势在D联结回路中环流，不会流入公共的高压电网。

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