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         Lightning protection box has the function of failure warning and the counting function of lightning strike. It can record 99 times of lightning stroke. Without battery , storage of data in solid storage memory can be kept for 20 years without loss.
When the lightning protection SPD in the box is deteriorated, the remote signal alarm by the instruction lamp, indicating that the lightning protection box has no protection ability and needs to be replaced immediately.

         TNR-SB type power lightning protection box in the normal condition, the lightning protection SPD in a high impedance state, does not affect the normal work, when the line transient overvoltage caused by lightning, lightning protection SPD in a very short time, rapid conduction, too short to ground voltage discharge, when overvoltage hours after lightning module returned to high resistance condition, does not affect the user's power supply.

         The TNR-SB lightning protection box is widely used in the power supply system of AC 47-63Hz. It is mainly used in the fields of meteorology, transportation, post and telecommunications, computer network, electronics, residence, railway and petrochemical industry, so as to effectively prevent the harm of over voltage to electrical equipment.

         TNR-SB type lightning protection box which belongs to the intelligent box: advanced design and maintenance, with remote remote alarm and lightning calculation function, the maximum record table data for 99 times, continuous anti lightning ability, and has intelligent quantitative indication, without the need to pick a fuse or switch on the air in the loop.

         Note: it is suggested that the Kevin wiring can be used to effectively reduce the residual pressure of lightning.

         Failure indication description

         Lightning box surface all lights (red, green) light for the normal situation, the deterioration in the over-voltage caused by lightning or long-term failure, the indicator light will turn off, when all the lights off, only when the red light, that has been used to limit, should be replaced immediately.

例：

    100KA：（最高讀數(shù)）指示燈亮?xí)r，表示防雷箱對(duì)應(yīng)的實(shí)際最大通流量為100KA，如熄滅表示只達(dá)到下一級(jí)75KA。

    75KA：當(dāng)上級(jí)指示燈熄滅時(shí)，表示防雷箱對(duì)應(yīng)的實(shí)際最大通流量為75KA，如熄滅表示只達(dá)到下一級(jí)60KA。

    60KA：當(dāng)上級(jí)指示燈熄滅時(shí)，表示防雷箱對(duì)應(yīng)的實(shí)際最大通流量為60KA，如熄滅表示只達(dá)到下一級(jí)50KA。

    50KA：指示燈（紅燈）亮?xí)r，表示防雷箱對(duì)應(yīng)的實(shí)際最大通流量為50KA時(shí)就要考慮更換。

    0KA：紅燈亮?xí)r，表示防雷箱最大通流量已小于50KA，0KA紅燈滅時(shí)，該防雷箱已無(wú)防雷功能。