CN203166323U - Small bus row at transformer station protection screen cabinet top end - Google Patents

Abstract

The utility model provides a small bus row at a transformer station protection screen cabinet top end. The small bus bar comprises terminal rows formed by vertically-arranged terminals, wherein a top end of each protection screen cabinet is respectively provided with one terminal row, the protection screen cabinets and the terminal rows of the protection screen cabinets are connected through single-stranded plastic wrapping hard copper wires of phi 1.28mm to phi 1.91mm, and the top end of each protection screen cabinet is respectively provided with a cover plate. The small bus row at the transformer station protection screen cabinet top end makes construction convenient, is convenient for compatibilization, has a flexible wiring mode, is safe, fast and convenient to realize wire disassembling, further improves insulation strength in an electrical loop, is convenient for operation after moving, greatly improves anti-interference capability integrally and reduces capital construction cost by about 90%.

Description

A small busbar arrangement on the top of a substation protection screen cabinet

technical field

The utility model relates to an arrangement of small busbars, in particular to an arrangement of small busbars at the top of a substation protection screen cabinet.

Background technique

The typical design of substations in my country originated from the design schemes of the former Soviet Union in the 1940s and 1950s. So far, the ideas in the original design are still partially adopted. With the continuous popularization of new equipment, some operating modes are no longer suitable for new equipment and New job requirements. Specifically, the installation and arrangement design of the small busbars on the top of the protective screen cabinet of the substation is to connect the small busbars to the terminal block. The small busbars on the top of the original substation protective screen adopt bare φ6mm-φ8mm copper rods or copper tubes with double upper and lower layers. When arranging the structure, during the construction of the small bus bar on the top of the screen, the copper rods of φ6mm-φ8mm are difficult to construct, the insulation is not easy to handle, and the operation and maintenance are extremely inconvenient. Wiring on small busbars becomes very inconvenient. Moreover, the compression screws on the upper and lower sides of the terminal block to protect the leads in the panel cabinet are all set horizontally, and the compression screws are set under the small bus bar. When the leads are disassembled during operation, the surroundings of the leads are live. Copper rods, operators have to risk personal electric shock to work.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, the utility model provides an arrangement of small busbars at the top of a substation protection screen cabinet.

The utility model is realized through the following technical solutions: a small busbar arrangement on the top of a substation protection screen cabinet, including a terminal row composed of a plurality of longitudinally arranged terminals, and a terminal row is arranged on the top of each protection screen cabinet, The protective screen cabinet and the terminal block of the protective screen cabinet are connected by φ1.28mm---φ1.91mm single-strand plastic sheathed hard copper wire.

In the above solution, in order to protect the short circuit of the equipment power supply caused by roof leakage and abnormal objects falling, and improve the electrical insulation level of the secondary equipment operation, the top of each protective screen cabinet is provided with a cover plate.

The beneficial effect of the arrangement of the small busbars at the top of the substation protection screen cabinet of the utility model is:

1. The single-strand plastic sheathed hard copper wire is used as the wire for the small busbar. The work arrangement of the wiring can be completed by only one ordinary wiring worker, and the construction intensity is reduced;

2. Using φ1.28mm--φ1.91mm single-strand plastic sheathed hard copper wire, the material cost is 90% lower than the copper rod cost, and the economic benefit is remarkable.

3. Using φ1.28mm--φ1.91mm single-strand plastic-sheathed hard copper wires makes it safe and easy to maintain, disassemble and connect lead wires during operation. In addition, when used in 220kV and above substations, even if there are a large number of small busbars It can be reasonably arranged on the top of the protective screen.

Description of drawings

Figure 1 is a schematic diagram of the structure of the small bus bar at the top of the protective screen cabinet of the original substation arranged with copper rods;

Fig. 2 is a structural schematic diagram of the arrangement of small busbars at the top of the substation protection screen cabinet of the utility model.

In the figure: 1. Protective screen cabinet, 2. Terminal block, 3. Bottom lead wire, 4. Copper rod, 5. Cross-border wire, 6. Single-strand plastic sheathed hard copper wire, 7. Upper compression screw, 8. Compression Tighten the screws, 9. Cover plate.

Detailed ways

The arrangement of the small bus bars at the top of the substation protection screen cabinet of the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments:

Figure 1 is a schematic diagram of the structure of the small bus bars on the top of the protective screen cabinet of the original substation arranged with copper rods. In the figure, the protective screen cabinets of the substation are arranged side by side, and two terminal rows 2 are vertically arranged on the top of a single protective screen cabinet 1. The small busbars between the terminal blocks 2 use φ6mm-φ8mm copper rods 4, and the copper rods 4 are pressed tightly by the upper compression screws 7, and the terminal blocks 2 on two adjacent protective screen cabinets 1 are used. The cross-border wire 5 is connected, and the lower lead wire 3 connected to the protection screen cabinet 1 on the terminal block 2 is arranged under the copper rod 4, and the compression screws 8 of the lower lead wire 3 are all arranged horizontally. The arrangement of rods 4 is denser again. Like this, in the construction of leading wire in the protection screen cabinet 1, it is very inconvenient for maintenance personnel to tighten and tighten the compression screw 8 during operation, which can easily cause personnel to get an electric shock or a short circuit of the equipment power supply, and it is also inconvenient to pass the lead wire in the screen cabinet in addition.

Fig. 2 is a structural schematic diagram of the arrangement of small busbars at the top of the substation protection screen cabinet of the utility model. In the figure, only one terminal row 2 is set on the top of the protective screen cabinet 1, and a single-strand plastic sheathed hard copper wire 6 of φ1.28mm---φ1.91mm is passed between the terminal strips 2 on two adjacent protective screen cabinets 1 In this way, it is very convenient for the maintenance personnel to operate, and the electric shock and short circuit of the power supply are greatly reduced. In addition, during the installation and construction, the work intensity is also greatly reduced. At the same time, in order to protect the short circuit of the equipment power supply caused by roof leakage and abnormal objects falling, and improve the electrical insulation level of the secondary equipment operation, the top of each protective screen cabinet 1 is provided with a cover plate 9, which plays a role of dust protection. effect.

Practice has proved that the use of φ1.28mm---φ1.91mm single-strand plastic sheathed hard copper wire 6 instead of φ6mm-φ8mm copper rod 4 fully meets the technical requirements of the secondary comprehensive self-equipment of the substation, and also makes the construction convenient. It is convenient to increase the capacity of the small busbar, and the wiring method is flexible. The dismantling of the small busbar is safe, fast and convenient. drop by about 90%.

Claims (2)

1. A small busbar arrangement on the top of a substation protection screen cabinet, including a terminal row composed of a plurality of longitudinally arranged terminals, characterized in that: a terminal row is arranged on the top of each protection screen cabinet, and the protection screen cabinet and protection The terminal blocks of the screen cabinet are connected by φ1.28mm---φ1.91mm single-strand plastic sheathed hard copper wire. 2 . The arrangement of small busbars at the top of the substation protection screen cabinets according to claim 1 , wherein a cover plate is provided on the top of each protection screen cabinet. 3 .

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