Zinc Oxide Surge Arrester Valve Plate Breakdown: Prevention And Analysis Of The Hidden Killer In The Power System

One of the most troublesome issues for electrical equipment during long-term operation is lightning protection failure. Many frontline electricians find during inspections that the seemingly robust 220 kv lightning arrester casing is actually quite fragile internally. If the external insulation bushing develops visible cracks, or if the internal components are severely damp, the core components of 33 kv lighting arrester are highly susceptible to irreversible structural collapse, directly causing the internal components of 33 kv lightning arrester to instantly lose their resistive properties under lightning strikes.

Why do core components burn out?

When the external overvoltage exceeds the equipment's withstand limit, or if 33 kv lighting arrester itself has developed cracks due to aging, the internal energy dissipation path will be blocked. The nonlinear resistors, which were originally intended for protection, will undergo physical property changes under high temperature and high pressure.

• Thermal collapse: When current continues to flow, heat cannot dissipate, and the grain boundary layer is damaged.

• Sealing failure: Moisture enters the casing, significantly reducing the internal insulation strength.

• Uneven current distribution: Localized hot spots form, inducing large-area short circuit paths.

Several Abnormal Signals During Operation and Maintenance

To safeguard the bottom line of power lines, simply watching the dashboard isn't enough; you must pay attention to those seemingly insignificant details.

Monitor Value Fluctuations

If the leakage current value increases exponentially, it indicates that the internal insulation is on the verge of collapse. At this point, the internal resistors may have developed minute discharge traces.

Appearance and Color Changes

If the porcelain bushing or composite jacket shows signs of carbonization, it means that the internal temperature has reached extremely high levels. This damage usually means that the protective capability has reached zero.

Abnormal Sounds

In humid environments, if you can hear a faint hissing sound, it means that current is breaking down the air or damaging components. At this point, the 33kv lightning arrester price device had become a "time bomb".

Faced with such an emergency, the only solution is to replace the damaged components immediately. After all, once such core precision components are damaged, they cannot self-repair; forcing them to operate with defects will only drag down the entire transmission line.