Dielectric Testing in LV Switchgear: Are You Doing It Right?
Dielectric testing is a critical step in verifying the insulation strength of low voltage switchgear—but if done incorrectly, it can cause more harm than protection.
During commissioning, this test applies high voltage to ensure the panel can withstand electrical stress under real operating conditions. However, misuse or confusion with other tests can lead to insulation damage, not validation.
Key points to understand: • This is NOT a routine insulation resistance test • It involves high voltage stress across insulation systems • It must follow strict procedures and safety limits
Common risks of incorrect execution: • Overstressing insulation components • Damaging control circuits or sensitive devices • Creating hidden faults before energization
Following the correct testing procedure based on IEC standards ensures: ✔ Reliable system performance ✔ Safe energization ✔ Reduced risk of early failure
If you're working with LV panels, understanding dielectric testing isn’t optional—it’s essential.
Make sure your testing process is aligned with standards and applied at the right stage.
