Deep analysis of applicable scenarios for zinc oxide lightning arrester (MOA)

Zinc oxide surge arresters have become the core equipment for overvoltage protection in power systems due to their gapless design, excellent nonlinear volt ampere characteristics, high energy absorption capacity, and long-term stability. The following scenarios are ideal choices due to their technological advantages:

High voltage and ultra-high voltage power systems

Substation and power plant

Application: Protect key equipment such as transformers, GIS devices, and circuit breakers from damage caused by lightning overvoltage and operational overvoltage.

Advantages:

High energy tolerance: capable of withstanding impulse currents of 100kA and above (such as 500kV systems).

Low residual voltage characteristic: The protection level is lower than the equipment insulation withstand value, reducing the risk of breakdown.

No freewheeling design: to avoid equipment overheating caused by continuous current.

Ultra high voltage/ultra-high voltage transmission lines

Application: 

To prevent lightning waves from entering substations and ensure the insulation safety of power lines.

Advantages:

Fast response: nanosecond level action time, cutting off lightning wave front (such as 1.2/50 μ s waveform).

High reliability: Long term operation without maintenance, reducing operation and maintenance costs.

Medium and low voltage distribution system

Distribution transformers and switchgear

Application: Suppress operation overvoltage (such as closing and reclosing) and lightning wave propagation along the line.

Advantages:

Compact design: Small in size, suitable for distribution rooms with limited space.

Economy: The cost is lower than traditional silicon carbide lightning arresters, and the protection effect is better.

Industrial and Civil Buildings

Application: Low voltage distribution system for protecting important facilities such as data centers and hospitals.

Advantages:

High protection level: IP65 or above, suitable for humid and dusty environments.

Intelligent monitoring: optional online monitoring function, real-time evaluation of equipment status.