3430-2 SAMSON
In order to prevent or reduce internal and external electromagnetic interference in the power electromagnetic environment, three suppression measures must be taken from the design stage: suppressing interference sources; Cut off or attenuate the propagation path of electromagnetic interference; Improve the anti-interference ability of devices and systems. These three points are the basic principles for suppressing electromagnetic interference
The anti-interference of DCS control system is a system engineering. The manufacturer is required to design and produce products with strong anti-interference capability, and it depends on the user department to consider in the engineering design, installation, construction, operation and maintenance, and carry out comprehensive design in combination with the specific situation, so that the electromagnetic compatibility and operation reliability of * * * system can be achieved.
In the anti-interference design of specific projects, the following two aspects should be considered for equipment selection. When selecting equipment, first of all, products with high anti-interference capability should be selected, including electromagnetic compatibility (EMC), especially the ability to resist external interference, such as DCS system with floating technology and good isolation performance; Secondly, it is also necessary to understand the anti-interference indicators given by the manufacturer, such as: common mode rejection ratio, differential mode rejection ratio, withstand voltage capability, and how strong the electric field and high frequency magnetic field are allowed to work in
Strictly follow China’s standards (GB/T13926) for reasonable selection. Additionally, it relies on examining its application performance in similar projects. Mainly considering several suppression measures from outside the system. The main content includes: shielding the DCS system and external leads to prevent electromagnetic interference from space radiation; Isolate and filter the external leads, especially the power cables should be arranged in layers to prevent the introduction of conductive electromagnetic interference through the external leads
