Power cable shielding requirements standard

The difference between single-layer power shielded wire and double-layer power shielded wire

The so-called "shielding" in the cable structure is actually a measure to improve the distribution of the electric field. The conductor wrapped with a conductor outside the conductor is called a shielded wire. The conductor wrapped with a conductor outside the conductor is called a shielded wire. The wrapped conductor is called a shielding layer, which is generally a braided copper mesh or copper foil (aluminum). The shielding layer needs to be grounded, and external interference signals can be introduced into the earth by this layer.

Shielded cable is a transmission line that uses a metal mesh braided layer to wrap the signal line. The braided layer is generally red copper or tinned copper. The shielding layer of the shielded cable needs to be grounded, and external interference signals can be introduced into the earth by this layer.

Shielded wire is a wire with a metal braided outer shell specially used to reduce the influence of external electromagnetic fields on power or communication lines. This shielded wire also has the function of preventing the line from radiating electromagnetic energy outward.

Function: Prevent interference signals from entering the inner layer, conductor interference, and reduce the loss of transmission signals at the same time.

The shielding layer of the shielded cable is mainly made of non-magnetic materials such as copper and aluminum, and the thickness is very thin, which is much smaller than the skin depth of the metal material at the frequency of use. The effect of the shielding layer is not mainly due to the reflection and absorption of the electric field and magnetic field by the metal body itself, but due to the grounding of the shielding layer. Different grounding forms will directly affect the shielding effect. The grounding methods for the electric field and magnetic field shielding layers are different.

Of course, when using cables for automotive parts companies or mechanical equipment manufacturers, pay attention to the application equipment requirements. To learn more about the product's compliance with standard requirements, please search and visit: OMG EV HV cable