Power line Power Grid Transmission tower 10KV controllable lightning rod Lightning Arrester

Power line tower 10KV controllable lightning rod

Ⅰ. Product description
Product Name: Lightning Rod for High Voltage Power Line
Lightning rod model： LSD- - XHGX
Lightning rod height： H=1.2m~2.0 m
Component name and material：304 Stainless steel air-termination needle body, circuit-type choke (wave resistance body),

Hot-dip galvanized fastening bracket (steel material Q235), grounding copper wire, special lightning counting system (optional).
It is used for lightning protection of high-voltage transmission line towers, erected on the top of the towers, completely isolated from the transmission lines, and will not have any impact on the normal operation of the transmission lines. Compared with the zinc oxide arrester, it will not form a current discharge channel due to the failure of the lightning protection equipment, which will affect the normal operation of the transmission line. The product has made technological innovations in terms of structure and protection mode. From the perspective of electromagnetic wave transmission, the system parameters are adjusted to effectively reduce the lightning impulse voltage of the line insulator, and the filtering device reduces the impact of the lightning current on the peak of the line high voltage. After testing, the reduction of the lightning peak amplitude can reach 30%, effectively reducing the lightning voltage amplitude directly acting on the tower frame by the lightning current, improving the lightning resistance level of the tower and the entire line, and has a great effect on the lightning flashing and tripping phenomenon of the line. The effective control effect has been proved to be significant.

Ⅱ. Standards for product production:
GB11032-2000（IEC60099-4:1991）"AC gapless metal oxide arrester";
JB/T8952-2005"Composite jacket gapless metal oxide arrester for AC system";
JB/T10497-2005"Series gap metal oxide arrester for composite jacket for AC transmission lines";JB/T8459-2006"Methods for Modeling Lightning Arrester Products."

Ⅲ. Technical advantages
1. It solves the occurrence of counter strikes and shielding strikes caused by lightning on the transmission line, effectively reduces the lightning trip rate of the line, improves the transmission reliability of the line, and truly realizes the processing of the lightning wave waveform. It is technically pertinent, effective and innovative. Sex.
2. The lightning current capacity is large, and the lightning resistance is strong.
3. Convenient installation, inspection-free, daily maintenance-free, and no increase in line inspection workload.
4. Special lightning counting system (optional), which can collect lightning data, facilitate recording and analysis, and solve the problems encountered in the line lightning protection work.
5. The lightning rod selection method is flexible and variable, and the suspension method and pile seat method can be selected according to the tower shape.

Ⅳ. Conditions of Use
1. The use environment needs to meet:
Ambient temperature: highest ambient temperature +50℃; lowest ambient temperature: -50℃; annual average temperature: 20℃.

Altitude: <5000 meters
Maximum wind speed: 35m/s (15 meters above the ground once in 15 years, 10 minutes average maximum) Maximum ice thickness: 10mm
Earthquake resistance: ≤10 level horizontal acceleration: 0.2g vertical acceleration: 0.1g
The horizontal and vertical acceleration act simultaneously and consider the influence of the tension oscillation of the connecting wire. The duration of the sine wave: 5 cycles.
Safety factor: ≥1.87

Pollution level 3

Thunderstorm days: 90 days/year

Maximum daily temperature difference: 30℃

Maximum monthly average relative humidity: 90%
2. Performance requirements:
1）Products should be manufactured in accordance with the relevant technical conditions and regulations of the People’s Republic of China National Standards GB50169 and DL/T 620, and should also meet:
a. Meet the conditions of tower grounding resistance R≤30Ω

b. Lightning current amplitude I≤350KA

c. The minimum withstand voltage standard 450KV

d. Altitude H≤5000M

e. Ambient temperature －50℃～＋50℃

f. The maximum wind speed does not exceed 35M/S
2）Ensure the reliable quality of the equipment, with a service life of more than eight years.

Ⅴ. Wind resistance and earthquake resistance coefficient check:
1. Wind resistance level 12, it is proposed that the maximum wind speed of level 12 wind is 45m/S, and the windward area of the needle bar is 0.12m2;

2. Perform strength review according to the design parameters, and the safety factor K=1.87>1.5;

3. Deflection review: the moment of inertia is 181040.625mm4, the deflection at the top of the needle bar is 390.76, and the needle bar deflection ratio is △=4.01%<5%.
After the above-mentioned relevant review calculations, the factors such as the maximum moment, strength and deflection of the root of the lightning rod rod have been reviewed, and all meet the requirements of the product's design wind resistance level 12 and earthquake resistance ≤10 level.