What are the advantages of Surge Arrester?

Surge arrester is a key component used in power systems and electrical equipment to limit overvoltage and protect the insulation of equipment. Its core advantages revolve around efficient lightning protection and surge prevention, ensuring equipment safety and enhancing system stability.

1. Precisely suppress overvoltage and protect equipment insulation

The surge arrester can quickly detect abnormal high voltages such as lightning overvoltage and operational overvoltage. It conducts and discharges the surge current within microseconds, limiting the voltage between the two ends of the equipment within the insulation tolerance range, preventing core equipment such as transformers, switch cabinets, and cables from being damaged by overvoltage and avoiding breakdown. This significantly reduces the failure rate of the equipment.

2. Response speed is fast, with no delay in actions.

The surge arrester, which uses non-linear resistance materials such as zinc oxide (ZnO), has no gaps or only a few series gaps. It does not require a breakdown voltage to be triggered and can respond immediately upon the occurrence of overvoltage. Compared to traditional discharge gaps, there is no action delay, and it can effectively handle lightning overvoltage in steep waveforms.

3. The power consumption is extremely low during normal operation.

Under the normal operating voltage of the power grid, the nonlinear resistance of the surge arrester presents a high impedance state, with a very small leakage current (at the microampere level), which consumes almost no electrical energy and does not cause any interference to the normal operation of the power grid. It can be connected in parallel in the circuit for long-term duty.

4. Large flow capacity and strong shock resistance

It has excellent current withstand capability, can safely discharge the huge energy generated by multiple lightning strikes or operational impacts, and its performance will not significantly deteriorate after withstanding such impacts. Different specifications of Surge Arrester can be adapted to power systems of different voltage levels, including low voltage, high voltage, and ultra-high voltage.

5. Small in size, flexible in installation, and easy to maintain.

The structure is compact and can be directly connected and installed in parallel at both ends of the protected equipment (such as the neutral point of a transformer, the inlet and outlet sides of a switch cabinet). No large amount of space is occupied. There are no mechanical moving parts, so the failure rate is low. Daily maintenance only requires regular detection of leakage current and insulation status, and the maintenance cost is low.

6. Wide application scenarios and strong compatibility

Suitable for various scenarios such as power stations, substations, industrial buildings, high-rise buildings, communication base stations, etc. It can protect different types of loads including power transformers, switch cabinets, motors, frequency converters, and precision electronic equipment. At the same time, it supports both AC and DC systems and can work in coordination with fuses, circuit breakers, and other protective devices to form a multi-layer protection system.

7. Improve the operational stability of the power system

Effectively reduce the accidents such as circuit breaker tripping and equipment damage caused by overvoltage, shorten the power outage time, and ensure the continuous and reliable power supply of the power system; for new energy grid-connected systems (such as photovoltaic and wind power), it can also prevent the grid-side surge from impacting the grid-connected inverters, and improve the stability of new energy power generation.