Seven characteristics of zinc oxide arresters:

Flow capacity

This is mainly reflected in the ability of lightning arresters to absorb various lightning overvoltages, power frequency transient overvoltages, and operating overvoltages.

Protection characteristics

Zinc oxide lightning arrester is an electrical product used to protect various electrical equipment in the power system from overvoltage damage, and has good protection performance. Because the non-linear volt-ampere characteristic of the zinc oxide valve disc is very good, so that only a few hundred microampere current passes under the normal working voltage, it is easy to design a gapless structure, so that it has good protection performance, light weight, and small size. feature. When the over-voltage invades, the current flowing through the valve plate increases rapidly, and at the same time, the amplitude of the over-voltage is limited, and the energy of the over-voltage is released. After that, the zinc oxide valve plate returns to a high resistance state, allowing the power system to work normally.

Sealing performance

The arrester element adopts a high-quality composite jacket with good aging performance and good airtightness, and measures such as controlling the compression of the sealing ring and adding sealant. The ceramic jacket is used as the sealing material to ensure reliable sealing and stable performance of the arrester.

Mechanical behavior

Mainly consider the following three factors:

A's seismic force;

B The maximum wind pressure acting on the arrester;

The top of the C arrester bears the maximum allowable pulling force of the wire.

Decontamination performance

The gapless zinc oxide arrester has high pollution resistance.

The level of creepage distance specified by the national standard is:

Class II medium pollution area: creepage distance 20mm/kv

Class III Heavy pollution area: creepage distance 25mm/kv

Level IV, extremely heavy and dirty areas: creepage distance 31mm/kv

High operational reliability                                                                                                                                                                                                          

The reliability of long-term operation depends on the quality of the product and whether the selection of the product is reasonable. The quality of its products is mainly affected by the following three aspects:

A. The rationality of the overall structure of the arrester;

B The volt-ampere characteristics and anti-aging characteristics of zinc oxide valves;

C The sealing performance of the arrester.

Power frequency tolerance

Due to various reasons such as single-phase grounding, long-line capacitance effect and load dumping in the power system, it will cause the rise of power frequency voltage or produce transient overvoltage with higher amplitude. The arrester has the ability to withstand a certain power frequency within a certain period of time. Voltage increase capability.

Yichang Hengyuan Technology Co., Ltd. is a professional manufacturer of European-style cable connectors, plug connectors, cable branch boxes, American elbows, high-voltage vacuum circuit breakers, high-voltage load switches, lightning arresters, zinc oxide arresters, tank arresters, overvoltage protectors, Counters, monitors, heat-shrinkable cable accessories, cold-shrinkable cable accessories, T-shaped heads, wall bushings, European cable accessories, American cable connectors, transformer neutral point protection devices, fuses, isolation switches, PT cable heads, elbows Manufacturers of type cable joints, 10kV outdoor terminals, switch cabinets, cable intermediate joints, cable accessories and other products