7 major characteristics of lightning arrester manufacturers
Lightning arrester is a type of power transmission equipment used to protect the insulation of AC transmission and substation equipment from lightning overvoltage and operating overvoltage damage. Do all users know what the 7 major characteristics of lightning arresters are? It is very important for users to use them. Today I will introduce them in detail, hoping to help users better apply the product.
Characteristics of lightning arrester:
1. Zinc oxide arrester manufacturers have large flow capacity
This is mainly reflected in the arrester's ability to absorb various lightning overvoltages, power frequency transient overvoltages, and operating overvoltages. The flow capacity of zinc oxide arresters produced by Yichang Hengyuan Technology Co., Ltd. fully meets the requirements of national standards. Indicators such as line discharge level, energy absorption capacity, 4/10 nanosecond high current impact tolerance, and 2ms square wave flow capacity have reached the domestic leading level.
2. Zinc oxide arrester has excellent protection characteristics
Zinc oxide arresters are electrical products used to protect various electrical equipment in the power system from overvoltage damage and have good protection performance. Because the nonlinear volt-ampere characteristics of the zinc oxide valve are very good, only a few hundred microamps of current can pass through it under normal operating voltage, making it easy to design into a gapless structure, making it feature good protection performance, light weight, and small size. When overvoltage invades, the current flowing through the valve plate increases rapidly, which limits the amplitude of the overvoltage and releases the energy of the overvoltage. After that, the zinc oxide valve plate returns to the high resistance state, allowing the power system to operate normally.
3. Zinc oxide arrester has good sealing performance
The arrester components adopt high-quality composite jackets with good aging performance and good air tightness. Measures such as controlling the compression amount of the sealing ring and adding sealant are adopted. The ceramic jacket is used as a sealing material to ensure reliable sealing and stable performance of the arrester.
4. Mechanical properties of zinc oxide arrester manufacturers
The following three factors are mainly considered:
⑴The earthquake force withstood;
⑵ Maximum wind pressure acting on the arrester
⑶The top of the arrester bears the maximum allowable pulling force of the conductor.
5. Good pollution-removing performance of zinc oxide arrester
Gapless zinc oxide arresters have high pollution resistance.
The current creepage distance level stipulated in national standards is:
⑴Level II moderately polluted areas: specific creepage distance 20mm/kv
⑵Level III heavily polluted areas: specific creepage distance 25mm/kv
⑶Level IV extremely polluted area: specific creepage distance 31mm/kv
6. High operational reliability of zinc oxide arresters
The reliability of long-term operation depends on the quality of the product and whether the product selection is reasonable. There are mainly three aspects that affect its product quality:
A The rationality of the overall structure of the arrester
B Volt-ampere characteristics and aging resistance characteristics of zinc oxide valves
C. Sealing performance of arrester
7. Power frequency tolerance
Due to various reasons in the power system, such as single-phase grounding, long-line capacitance effect, and load shedding, the power frequency voltage will increase or a transient overvoltage with a high amplitude will occur. The arrester has the ability to withstand a certain power frequency voltage increase within a certain period of time.
Yichang Hengyuan Technology Co., Ltd. specializes in the production of European-style cable joints, plug-and-pull heads, cable branch boxes, American-style elbow joints, high-voltage vacuum circuit breakers, high-voltage load switches, arresters, zinc oxide arresters, tank arresters, over-voltage protectors, counters, monitors, heat-shrinkable cable accessories, Manufacturer of cold shrink cable accessories, T-heads, wall bushings, European cable accessories, American cable joints, transformer neutral point protection devices, fuses, isolating switches, PT cable heads, elbow cable joints, 10kV outdoor terminals, switch cabinets, cable intermediate joints, cable accessories and other products
