Intelligent lightning protection power distribution comprehensive protection cabinet

Abstract

The utility model relates to the field of power supply and distribution, in particular to an intelligent lightning protection power distribution comprehensive protection cabinet. The utility model provides an intelligent lightning protection power distribution comprehensive protection cabinet by starting from the lightning protection requirement of a railway communication system, combining the characteristics of AC incoming line power distribution and integrating the lightning protection and power distribution elements of a railway communication power supply incoming line. The device has good lightning protection performance and a practical and flexible power distribution configuration framework, and is a reasonably upgraded replacement device for railway communication power supply incoming line power distribution.

Description

Technical Field

[0001] The utility model relates to the field of power supply and distribution, in particular to an intelligent lightning protection power distribution comprehensive protection cabinet. Background Technique

[0002] With the continuous increase of the railway operation scale in China, maintaining the stability of the railway communication link plays an increasingly important role in ensuring the normal operation of the railway system. Railway communication power distribution equipment is the infrastructure of the railway communication system. It is necessary to improve the adaptability of railway communication power distribution equipment to the lightning electromagnetic environment, improve its configuration and management methods, and more reliably ensure the normal operation of the railway communication system.

[0003] At present, although the incoming power supply distribution facilities of the railway communication system also have basic lightning protection functions, there are generally still some deficiencies, such as the state monitoring of the lightning protection device is relatively simple, and the intrusion monitoring of lightning overvoltage is still lacking; in addition, lightning protection and power distribution are relatively independent, the protection effect needs to be improved, and the engineering installation wiring is not convenient. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the problems in the prior art that lightning protection and power distribution are relatively independent, the protection effect needs to be improved, and the engineering installation wiring is not convenient, and provide an intelligent lightning protection power distribution comprehensive protection cabinet.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0006] An intelligent lightning protection power distribution comprehensive protection cabinet, including a cabinet body, three-phase input ends, a power distribution output end, two power distribution devices arranged in the cabinet body, an automatic transfer switch, and a monitoring unit;

[0007] There are two three-phase input ends, which are respectively electrically connected to the input ends of the two power distribution devices; the power distribution output end includes a single-phase output end and five three-phase output ends;

[0008] The power distribution device includes a lightning arrester and a current transformer; specifically, the first end of the current transformer is respectively electrically connected to the three-phase input end and one end of the lightning arrester; the other end of the lightning arrester is grounded; the other end of the current transformer is respectively electrically connected to one of the three-phase output ends and the automatic transfer switch;

[0009] One end of the automatic transfer switch is respectively electrically connected to the output ends of the two power distribution devices, and the other end is respectively electrically connected to a single-phase output end and three three-phase output ends.

[0010] One end of the monitoring unit is connected to the lightning arrester and the current transformer for status monitoring, and the other end of the monitoring unit is connected to the three-phase input terminal for control. The monitoring unit is communicatively connected to external devices through RS485 or TCP / IP channels.

[0011] As a preferred solution of the present utility model, circuit breaker switches are provided inside the ports of the three-phase input terminal and the power distribution output terminal.

[0012] As a preferred solution of the present utility model, the circuit breaker is a molded case circuit breaker MCCB and a miniature circuit breaker MCB.

[0013] As a preferred solution of the present utility model, a ground wire port and a neutral wire port are provided on the cabinet body.

[0014] As a preferred solution of the present utility model, the lightning arrester is a modular intelligent surge protector SPD.

[0015] As a preferred solution of the present utility model, the current transformer is a general-purpose CT coil BH-0.66.

[0016] As a preferred solution of the present utility model, the automatic transfer switch is a PC-class dual power source transfer device ATSE.

[0017] As a preferred solution of the present utility model, the cabinet body is bolt-fixed.

[0018] As a preferred solution of the present utility model, the cabinet body is made of cold-rolled steel plate.

[0019] As a preferred solution of the present utility model, it further includes a monitoring unit, and the monitoring unit is communicatively connected to external devices through RS485 or TCP / IP channels.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] Starting from the lightning protection requirements of the railway communication system and combining its AC incoming power distribution characteristics, the present utility model integrates the lightning protection and power distribution elements of the railway communication power incoming line, and proposes an intelligent lightning protection and power distribution comprehensive protection cabinet. It has good lightning protection performance and a practical and flexible power distribution configuration architecture, and is a reasonable upgrade and replacement device for the railway communication power incoming line power distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of an intelligent lightning protection and power distribution comprehensive protection cabinet according to Embodiment 1 of the present utility model;

[0023] Figure 2 It is a schematic electrical principle diagram of an intelligent lightning protection and power distribution comprehensive protection cabinet according to Embodiment 2 of the present utility model. Specific Embodiments

[0024] The present utility model will be further described in detail below in combination with test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter of the present utility model is limited to the following embodiments, and all technologies implemented based on the content of the present utility model belong to the scope of the present utility model.

[0025] Embodiment 1

[0026] As Figure 1 shown, an intelligent lightning protection power distribution comprehensive protection cabinet includes a cabinet body, three-phase input terminals, a power distribution output terminal, two power distribution devices disposed in the cabinet body, and an automatic transfer switch. In this application, by controlling the opening and closing of the switch, two-way input and multi-way power distribution output are realized, and the output is automatically switched according to different input power supplies.

[0027] There are two three-phase input terminals, which are respectively electrically connected to the input terminals of the two power distribution devices; the power distribution output terminal includes a single-phase output terminal and five three-phase output terminals.

[0028] The power distribution device includes a lightning arrester and a current transformer; specifically, the first end of the current transformer is respectively electrically connected to the three-phase input terminal and one end of the lightning arrester; the other end of the lightning arrester is grounded; the other end of the current transformer is respectively electrically connected to one of the three-phase output terminals and the automatic transfer switch.

[0029] One end of the automatic transfer switch is respectively electrically connected to the output terminals of the two power distribution devices, and the other end is respectively electrically connected to a single-phase output terminal and three three-phase output terminals.

[0030] Embodiment 2

[0031] The difference between this embodiment and Embodiment 1 is that circuit breaker switches are provided inside the ports of the three-phase input terminal and the power distribution output terminal.

[0032] Specifically, the electrical schematic diagram of the current intelligent lightning protection power distribution comprehensive protection cabinet is as Figure 2 shown, 380VAC is connected to the intelligent lightning protection power distribution comprehensive protection cabinet from two three-phase input terminals.

[0033] One path passes through circuit breaker 101QF and then is connected to lightning arrester SPD1 (Surge protection Device) and current transformer CT1 (Current transformer); the other end of current transformer CT1 is respectively electrically connected to circuit breaker 102QF and automatic transfer switch ATS (Automatic Transfer Switching Equipment); the other end of circuit breaker 102QF is connected to the three-phase output terminal of the first path (denoted as output 1 of path Ⅰ).

[0034] Another path is connected to the lightning arrester SPD2 and the current transformer CT2 after passing through the circuit breaker 201QF; the other end of the current transformer CT2 is electrically connected to the circuit breaker 202QF and the automatic transfer switch ATS respectively; the other end of the circuit breaker 202QF is connected to the three-phase output terminal of the second path (denoted as the output 1 of the II path).

[0035] The other end of the automatic transfer switch ATS is connected to the circuit breakers 301QF, 302QF, and 303QF respectively and then connected to the three-phase output terminal, denoted as outputs 2 - 4 in sequence; at the same time, the other end of the automatic transfer switch ATS is also connected to the circuit breaker 304QF and then connected to the single-phase output terminal, denoted as output 5.

[0036] Further, in this embodiment, the circuit breaker is a molded case circuit breaker MCCB and a miniature circuit breaker MCB.

[0037] Further, the lightning arrester is a modular intelligent surge protector SPD.

[0038] Further, the current transformer is a general-purpose CT coil BH - 0.66.

[0039] Further, the automatic transfer switch is a PC-class dual power supply switching device ATSE.

[0040] Further, the cabinet is fixedly installed by bolts.

[0041] Further, the cabinet material is cold-rolled steel plate.

[0042] Further, a ground wire port PE line (protecting earthing) and a neutral wire port N line (Neutral line) are provided on the cabinet.

[0043] Embodiment 3

[0044] The difference between this embodiment and the foregoing embodiments is that it further includes an early warning device, which is used to collect electrical parameters such as phase loss, voltage, current, power, power consumption, demand, harmonics, leakage current, "zero - ground" voltage, etc. of the two-way power distribution inlets, as well as the opening and closing states of the inlet switches and important branch switches, the automatic switching state of the dual power supply, the temperature of the inlet line, the state of the lightning protection module, etc. And it communicates with external devices through the RS485 or TCP / IP channel and uploads the data to the staff for processing.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent lightning protection power distribution integrated protection cabinet, comprising a cabinet body, a three-phase input terminal, and a power distribution output terminal, characterized in that: It also includes two power distribution devices, an automatic transfer switch and a monitoring unit arranged in the cabinet; There are two three-phase input terminals, which are electrically connected to the input terminals of the two power distribution devices respectively; the power distribution output terminals include a single-phase output terminal and five three-phase output terminals; The power distribution device includes a lightning arrester and a current transformer; specifically, a first end of the current transformer is electrically connected to the three-phase input end and one end of the lightning arrester respectively; the other end of the lightning arrester is grounded; the other end of the current transformer is electrically connected to one of the three-phase output ends and the automatic transfer switch respectively; One end of the automatic transfer switch is electrically connected to the output ends of the two power distribution devices, and the other end is electrically connected to a single-phase output end and three three-phase output ends; One end of the monitoring unit is connected to the lightning arrester and the current transformer for status monitoring, and the other end of the monitoring unit is connected to the three-phase input end for control. The monitoring unit is connected to the external device through RS485 or TCP / IP channel.

2. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 1 is characterized in that: Circuit breaker switches are provided in the ports of the three-phase input end and the power distribution output end.

3. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 2 is characterized in that: The circuit breaker is a plastic case circuit breaker MCCB and a miniature air circuit breaker MCB.

4. The intelligent lightning protection power distribution integrated protection cabinet according to claim 1 is characterized in that: The cabinet is provided with a ground wire port and a neutral wire port.

5. The intelligent lightning protection power distribution integrated protection cabinet according to claim 1 is characterized in that: The lightning arrester is a modular intelligent surge protector SPD.

6. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 1 is characterized in that: The current transformer is a universal CT coil BH-0.

66.

7. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 1 is characterized in that: The automatic transfer switch is a PC-level dual power supply switching device ATSE.

8. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 1 is characterized in that: The cabinet is fixed by bolts.

9. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 1 is characterized in that: The cabinet body is made of cold-rolled steel plate.

10. The intelligent lightning protection and power distribution integrated protection cabinet according to claim 1 is characterized in that: The system also includes a monitoring unit, which is connected to the external device through an RS485 or TCP / IP channel.

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