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自国际标准IEC297—1、2、3引入我国并据此制订出国际GB3047标准以来,不少人对19英寸插箱能否竖置有怀疑,理由是认为高度模数为44.45,宽度模数为5.08,其间没有整倍数关系;另外,窄柜组合成19英寸机柜时,由于19英寸插箱不能横竖颠倒,插箱的跨架就成为不可能,从而得出结论:该标准灵活通用性差。但是通过具体设计和分析,发现上述意见有失偏颇,我们认为19英寸插箱竖置的可能性是存在的,试分析如下。
Since the introduction of international standards IEC297-1, 2, 3 and accordingly the development of the international GB3047 standard, many people doubt whether the 19-inch sub-rack vertical installation, the reason is that the height modulus of 44.45, the width of the module 5.08, there is no relationship between the multiple; In addition, the narrow cabinet into a 19-inch cabinet, because the 19-inch subrack can not be reversed, the inter-chassis racks to become impossible, concluded that: the standard flexible versatility is poor. However, through the specific design and analysis, we found that the above opinion is biased. In our opinion, the possibility of vertically inserting a 19-inch subrack exists. The analysis is as follows.