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一、电动单元组合仪表的防爆问题电动仪表与气动仪表相比,在信号传送距离,响应速度和配用电了计算机等方面,电动仪表显示出一系列的优点电。但是这种仪表的防爆基本上是采用隔离防爆(或称耐压防爆)结构,这就使其在存在有爆炸性空气混合物的场合的应用受到很大的限制。在电动单元组合仪表的发展过程中,为了克服上述缺点,开始对本质安全防爆问题进行深入的研究,本质安全防爆型电动仪表的优点是: 1.仪表或仪表的一部分电气回路,可以设置在高度危险的场所并正常工作: 2.调正和维护工作可以在现场带电进行; 3.由于没有耐压防爆结构,可以节省安装费用。
First, the explosion-proof electric unit combination instrument Electric instruments and pneumatic instruments compared to the signal transmission distance, response speed and with a computer, etc., the electric instrument shows a series of advantages of electricity. However, this instrument is basically explosion-proof isolation explosion-proof (or pressure explosion-proof) structure, which makes it in the presence of explosive air mixtures where the application is subject to great restrictions. In the development of electric unit instrument cluster, in order to overcome the above shortcomings, start the intrinsically safe explosion-proof problem in-depth study, intrinsically safe explosion-proof electric instrument has the following advantages: 1. Instrument or instrument part of the electrical circuit can be set at height Dangerous places and work: 2. Adjustment and maintenance work can live in the field; 3. Because there is no pressure explosion-proof structure, you can save installation costs.