Shielded High Voltage Cable vs. Non-Shielded CableShielded Cable

Contains a conductive layer (shield) that surrounds the insulated conductors. Protects the conductors from external electromagnetic fields (EMFs) and electrical noise. Reduces voltage stress on the insulation, improving its reliability and preventing premature failure. Useful in areas with high EMF levels, such as near power lines or electronic equipment.

Non-Shielded Cable

Does not have a conductive shield. More susceptible to external EMFs and electrical noise. Has higher voltage stress on the insulation, which can lead to premature failure. Suited for areas with low EMF levels and where shielding is not necessary.

How Corona Affects Non-Shielded CableCorona

A discharge of electricity that occurs when the voltage on a conductor exceeds a certain threshold. Creates a visible glow or "corona" around the conductor. Can cause power loss, electromagnetic interference (EMI), insulation degradation, and conductor damage.

Impact on Non-Shielded Cable

Non-shielded cables are more susceptible to corona due to their lack of shielding. Corona in non-shielded cables can lead to: Insulation damage, reducing its insulating capacity and increasing the risk of failure. Conductor damage, causing pitting or erosion over time. Power loss due to energy dissipated in the corona discharge. EMI, interfering with nearby electronic devices. To minimize corona in non-shielded cables, it is important to maintain proper voltage and current levels, use appropriate cable sizes, and ensure proper installation and maintenance.

When to Use Shielded vs. Non-Shielded Cable

The choice between shielded and non-shielded cable depends on the specific application and environmental conditions: Shielded cable

Use in areas with high EMF levels, limited space, or where protection from noise or voltage stress is critical.

Non-shielded cable: Use in areas with low EMF levels, larger spaces, or where shielding is not necessary.By considering the factors discussed above, you can make informed decisions about the type of cable to use in your high voltage applications. Flag for review