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一、防护标准的回顾各种防护等级按标准NFC.51 115及IEC144文件,而且用来表示防护等级的符号,由字母IP和其后两个特征数字所组成。偶尔需要补充一些字母,以补充防护等级的标记。常补充下面的字母: R—接管道的电机; W—气候型电机。这些字母置于IP和两个特征数字之间。因此,在封闭式电机情况下则有: 防护级IP44 第一个特征数字4—防护超过1毫米的固体物质的电机;
First, the protection of the standard review Various protection levels according to the standard NFC.51 115 and IEC144 documents, but also used to indicate the degree of protection of the symbol by the letters IP and the following two characteristics of digital form. Occasionally need to add some letters to supplement the level of protection of the mark. Often add the following letters: R-connected pipeline motor; W-climate motor. These letters are placed between the IP and the two feature numbers. Therefore, in the case of closed motors there are: Protection class IP44 First characteristic figure 4- Motor protection of solid substances over 1 mm;