Classification and Model

Classified by voltage level:

High voltage lightning arresters (such as 110kV, 220kV, 500kV, etc.).

Medium voltage lightning arrester (such as 10kV, 35kV, etc.).

Low voltage lightning arrester (such as 0.22kV, 0.38kV, etc.).

Classified by structural form:

Seamless zinc oxide lightning arrester.

Zinc oxide lightning arrester with gap (less commonly used).

Classified by purpose:

Power station type, line type, distribution type, parallel capacitor bank protection type, etc.

technical parameter

Rated voltage (Ur): The maximum continuous operating voltage allowed by a lightning arrester during normal operation.

Continuous operating voltage (Uc): The maximum DC voltage allowed for the lightning arrester during long-term operation.

Nominal discharge current (In): The peak lightning impulse current that a lightning arrester can withstand, usually 5kA, 10kA, 20kA, etc.

Residual voltage: The peak voltage at both ends of a lightning arrester under nominal discharge current.

Energy absorption capacity: The lightning energy that a lightning arrester can absorb, usually measured in kJ.

Advantages and limitations

Advantages:

Fast response speed and superior protection performance.

Seamless design, simple structure, high reliability.

Large current capacity, suitable for high voltage level systems.

Low residual pressure, good protective effect.

limitations:

When subjected to operating voltage for a long time, there may be microampere leakage current, causing the valve plate to heat up.Sensitive to environmental humidity, temperature, and other conditions, good sealing performance is required.

The price is relatively high.