False-wiring-proof lightning protection system of single-phase power supply

Abstract

The invention relates to the technical field of lightning protection of electric equipment and in particular relates to a false-wiring-proof lightning protection system of a single-phase power supply. The false-wiring-proof lightning protection system comprises a power supply management unit; the power supply management unit is provided with an L end, an N end and a PE end, and is characterized by further comprising a first-layer lightning protection circuit, a second-layer lightning protection circuit, a false-wiring-proof alarming circuit and a lightning monitoring alarming circuit. The false-wiring-proof lightning protection system of the single-phase power supply is scientific and reasonable in design, simple in structure and safe and reliable, and can be finished by simple manufacturing, without a complicated welding process; the false-wiring-proof lightning protection system can provide comprehensive lightning protection on the single-phase power supply, particularly the single-phase power supply of a communication system, and also can effectively prevent false wiring of a power line, record lightning data and issue a warning to the outer side.

Description

technical field [0001] The invention relates to the technical field of lightning protection for electrical equipment, in particular to a lightning protection device for preventing miswiring of a single-phase power supply. Background technique [0002] In the past, the surge arresters for power supply of communication stations on the market mostly used the lightning protection combination of gap surge arresters and varistors. Later, because the gap surge arresters were installed on the phase lines of mobile base stations and access networks, they caught fire many times, so the communication industry stipulated that the installation of gap surge arresters was prohibited. On the phase line, more and more manufacturers now apply the gap arrester to the lightning protection between the N-PE terminals. Although it is not installed on the phase line, the shortcoming of the high residual voltage of the gap arrester still cannot be solved. Moreover, when the gap arrester is applied t...

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Problems solved by technology

It is worth noting that because 220V<255V, the gap arrester is not conducting, and it is difficult for people to find that the phase sequence has been wrongly connected. Once the lightning surge current is impacted, the peak voltage easily exceeds 255V, causing the gap arrester to conduct and fail. A huge power frequency current is formed, which causes the metal sheet inside the arrester to heat and melt to form a short circuit, eventually causing a fire

At the same time, most of the existing communication system power supply lightning protection devices do not have a lightning monitoring and recording system, resulting in data such as how many lightning strikes the power system has suffered, when it has suffered lightning strikes, and how many lightning strikes it has suffered. Announce the alarm on the external

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