Two-port lightning protection device for display screen and message board of highway

A technology for highways and display screens, which is applied to emergency protection circuit devices, circuit devices, and emergency protection circuit devices for limiting overcurrent/overvoltage, which can solve problems such as damage to display screens and other electrical equipment, and reduce residual pressure effect

Inactive Publication Date: 2012-11-14
刘晶川 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the open terrain of the expressway, this makes the display screen and other electrical equipment vulnerable to lig

Method used

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  • Two-port lightning protection device for display screen and message board of highway

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Embodiment Construction

[0009] Such as figure 1 As shown, the two-port lightning protector for highway display screens and information boards of the present invention includes an incoming line terminal block 1 and an outgoing line terminal block 2; the incoming line terminal block 1 and the outgoing line terminal block 2. The corresponding A-phase, B-phase, and C-phase terminals are electrically connected through the decoupling coils LA, LB, and LC respectively; the two ends of each of the decoupling coils LA, LB, and LC are respectively passed through a continuous working voltage ≥ 600 The voltage-limiting type power surge protector 3 is electrically connected to the neutral line N terminal on the incoming line terminal block 1 and the outgoing line terminal block 2.

[0010] When in use, connect the power supply output end of the distribution box of the expressway toll station to the corresponding A phase, B phase, C phase and neutral line N on the incoming line terminal block, and the A phase, B p...

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Abstract

The invention discloses a two-port lightning protection device for a display screen and a message board of a highway. The two-port lightning protection device comprises an incoming line connecting terminal strip and an outgoing line connecting terminal strip, corresponding phase As, phase Bs and phase Cs on the incoming line connecting terminal row and the outgoing line connecting terminal row are electrically connected through a decoupled coil LA, a decoupled coil LB and a decoupled coil LC respectively, two ends of each of the decoupled coil LA, the decoupled coil LB and the decoupled coil LC are electrically connected with a neutral line N connecting terminal on the incoming line connecting terminal row and the outgoing line connecting terminal row respectively through a voltage limiting type power source surge protection device, and a neutral line N is connected with a grounding terminal PE of the display screen and further connected with a metal shell of the display screen. The two-port lightning protection device for the display screen and the message board of the highway has the advantages that two-pole series connection lightning protection is adopted, so that residual voltage in lightning stroke is effectively lowered, and the display screen and the message board of the highway are protected from being influenced by thunder and lightning.

Description

technical field [0001] The invention relates to the lightning protection of expressway display screens and information boards, in particular to a two-port lightning protector used for expressway display screens and information boards. Background technique [0002] At present, most of the display screens installed on expressways are powered by industrial frequency alternating current. Since the distance between each display screen and the toll station varies from a few hundred meters to tens of kilometers, there is line loss of the power supply line that causes the display screen to be damaged. Not working problem. In order to solve this problem, it is generally adopted to increase the voltage to 600V at the toll station, and then use a power supply cable to transmit it to the display screen and then reduce the voltage to the rated working voltage of the display screen. Due to the open terrain of the expressway, this makes the electrical equipment such as display screens vul...

Claims

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Application Information

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IPC IPC(8): H02H9/04
Inventor 刘晶川刘吉克王志岗张征刘亚克曾亚清
Owner 刘晶川
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