控制系统电缆的屏蔽
Automation in Petro-Chemical Industry(2012)
Abstract
控制系统面临的电磁噪声,大部分是外部电缆从端口引入系统的,电缆的屏蔽在控制系统的抗干扰过程中显得尤为重要。通过对电缆屏蔽层的接地方法、电缆内屏蔽层的材质选择、双绞电缆的绞距选择、电缆穿金属管的埋地敷设等的介绍,阐述了自控工程中电缆屏蔽的机理和应用,并提出需要注意的地方。
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Key words
electromagnetic shielding,control system,grounding,cable,electrostatic shielding,radiation shielding
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