1. Material selection and processing
Distribution cabinet sheet metal shell can choose materials with good electromagnetic shielding performance, such as metal sheets with high magnetic permeability. For example, high-quality cold-rolled steel sheets can effectively block the intrusion of external magnetic fields. At the same time, the sheet metal shell can be subjected to special surface treatment, such as spraying electromagnetic shielding coating, to enhance its shielding ability against electromagnetic waves of different frequencies. This coating can absorb or reflect external electromagnetic radiation and reduce the possibility of its entry into the distribution cabinet.
2. Structural optimization design
First, it is crucial to ensure the sealing of the sheet metal shell. Through precise welding technology and the use of high-quality sealants, the various joints of the shell are tightly fitted to prevent external electromagnetic waves from penetrating through the gaps. Secondly, the vents and heat dissipation holes are reasonably designed. Filters or shutters with electromagnetic shielding functions can be installed in these parts to ensure air circulation and heat dissipation, and to block external electromagnetic interference. In addition, a well-designed grounding structure can reliably ground the shell to provide a low-impedance discharge path for external electromagnetic interference and reduce its impact on internal equipment.
3. Adjustment of internal layout
Inside the distribution cabinet, reasonable arrangement of equipment layout helps to reduce electromagnetic interference. Separate equipment that is sensitive to electromagnetic interference from equipment that may cause interference, increase the distance between them, and reduce the chance of electromagnetic coupling. At the same time, try to shorten the length of the signal cable to avoid the antenna effect caused by excessive cable length and receive external electromagnetic interference. Shielded cables can be used for key signal cables, and ensure that the shielding layer is well grounded to further improve the anti-interference ability.
4. Application of auxiliary measures
In addition to the above methods, electromagnetic shielding covers can also be installed in the distribution cabinet. For particularly sensitive equipment, the use of metal shielding covers can provide a local electromagnetic shielding environment for it. In addition, the use of filters is also an effective method. Installing appropriate filters at the input and output of the distribution cabinet can filter out electromagnetic interference signals in the external power supply and ensure that the power input to the internal equipment is pure and stable. Through these comprehensive measures, the impact of external electromagnetic interference on the internal equipment of the distribution cabinet can be prevented to the greatest extent.
