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Key parameters to consider when selecting and adapting lightning arresters

August 04,2023

Lightning arrester/surge arrester  is a very important lightning protection device that plays an irreplaceable role in lightning protection. When selecting lightning arresters/arresters, we need to consider the on-site situation, especially focusing on whether their parameters match. Today, WPX Communication Technology Co., Ltd. shares with you the key parameters to consider when selecting lightning arresters/surge arresters.


Firstly, the interface form

The interface form of lightning arrester/arrester mainly includes one port and two ports. The selection should be based on the actual situation on site and the situation of the protected equipment. One port lightning protectors are generally connected in parallel, while two port lightning protectors are usually connected in series.

The  power lightning protection  devices are all one port, connected in parallel in the circuit. When there is no transient overvoltage in the protected line, the power lightning arrester does not operate, which does not affect the normal use of the line; When transient overvoltage occurs in the line, the resistance of the power lightning arrester instantly decreases to infinitely small, which can quickly release lightning current.

Signal lightning arresters/surge arresters are mostly two ports, connected in series at the front end of the protected equipment, making installation convenient and maintenance simple.

Secondly, discharge current

The discharge current is generally divided into nominal discharge current and maximum discharge current. The nominal discharge current refers to the current peak with 8/20 wave type flowing through the surge protector (SPD). The maximum discharge current is the peak value of 8/20 wave current flowing through the Surge protector. The nominal discharge current and maximum discharge current vary depending on the level of power lightning arrester/arrester. It is necessary to carefully compare the actual needs of the product to ensure safety protection.

Thirdly, voltage

The voltage we are referring to here mainly includes three types: rated working voltage, maximum sustainable operating voltage, and voltage protection level.

The rated working voltage is the normal working voltage for the application, such as 220V.

The maximum sustainable operating voltage is the effective value of the maximum AC voltage or DC voltage applied to the lightning arrester/arrester. Sometimes its value is equal to the rated voltage.

The voltage protection level is a performance parameter that represents the voltage between Surge protector terminals, and its value can be selected from the list of preferred values.

Clarifying these three voltage values can better screen out suitable lightning arresters/arresters.

Fourthly, insertion loss

Insertion loss refers to the voltage ratio before and after the insertion of lightning arrester/arrester at a given frequency. This is the main parameter of the series type signal lightning arrester. When selecting, it is necessary to choose a lightning arrester with low insertion loss to ensure the safety of the line.

Fifth, transmission rate

Transmission rate is an important parameter of network signal lightning arrester/lightning arrester, indicating how many bit values are transmitted in one second, in bps; It is a reference value for correctly selecting lightning protectors in data transmission systems, and the data transmission rate of lightning protectors depends on the transmission method of the system. For example, gigabit network signal lightning arrester/Surge protector.

Sixth, explosion-proof level

The lightning arrester used in flammable and explosive places shall have explosion-proof grade, such as explosion-proof lightning arrester/lightning arrester/Surge protector. Ex d Ⅱ Ct6 meets the requirements.

The above parameters are key considerations when selecting lightning arresters/arresters. In addition, many lightning arresters/arresters are applied in high-altitude areas or polluted areas, and there are also special parameter requirements. This requires selection and adaptation based on the actual situation on site and the specific requirements of the protected equipment.

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