The working principle of shielded cabinet

According to different purposes and functions, shielding cabinets shielding method has the following three kinds: 1, electrostatic shielding

electrostatic shielding cabinets is to prevent electrostatic coupling interference, usually is refers to the electrostatic field shielding. In electrostatic shielding, shielding conductor induction must be grounding, shielding and grounding body and ground wire is its electric conductivity of metal shielding material.

2, emc electromagnetic shielding to prevent a high electromagnetic interference, is mainly used to control noise and sensitive equipment, at the same time under the condition of far away through the electromagnetic field coupling interference, at the time of electromagnetic shielding, shielding grounding body itself can not generally, but in order to avoid electrostatic coupling phenomenon, electromagnetic shielding grounding conductor can do processing. Magnetic shielding

3, main prevent low-frequency magnetic field induction magnetic shielding, shielding is difficult, usually with high permeability and low resistivity of metal material with a thickness of the shell, in order to control the magnetic field lines in the magnetic resistance a small shield inside, so as to prevent the spread of the magnetic field in magnetic shield, shield grounding will not affect the shielding effectiveness, the actual structure in order to prevent electrostatic induction, shield casing (generally Safety ground) 。