CN204858390U - CT secondary side shorting wiring and CT secondary side shorting system - Google Patents

Abstract

The utility model discloses a shorting stub of CT secondary side and CT secondary side short circuit system, the shorting stub of CT secondary side, including wire and metal fastener, be equipped with a plurality of metal fasteners on the wire, the conductor contact inside with the wire of metal fastener, the end of wire is equipped with experimental a clamp. Adopt the CT secondary side short circuit system of CT secondary side shorting stub, including the CT body, on current terminal rows who converges in the accuse cabinet was guided to to the secondary side terminal in the CT body through the secondary line, on a plurality of metal fasteners pressed from both sides the terminal on current terminal rows in proper order, the terminal experimental clamping connection of wire arrived on the ground connection row. Adopt the utility model discloses a CT secondary side shorting stub short circuit CT no longer need unpack the CT body apart, and whole short circuit is labour saving and time saving very, moreover easy dismounting. The commonality of this shorting stub simultaneously is also very strong, not only to the CT among the GIS to other mounted positions than CT lower, make things convenient for the short circuit on the body, short circuit that also can convenient and fast is because can be the reliably quick clamp of metal fastener is on the CT terminal.

Description

CT secondary side shorting wiring and CT secondary side shorting system

technical field

The utility model relates to the technical field of electric equipment, in particular to a CT secondary side short circuit and a CT secondary side short circuit system.

Background technique

With the rapid development of smart substations in my country, GIS combined electrical equipment has become an indispensable part of smart substations. GIS equipment is the primary equipment in a substation other than transformers, including circuit breakers, isolating switches, grounding switches, voltage transformers, current transformers, lightning arresters, busbars, cable terminals, incoming and outgoing bushings, etc. combined into a whole. During the high-voltage test for GIS combined electrical appliances, it is strictly forbidden to open the secondary side of the current transformer (hereinafter referred to as CT) in GIS, especially when the withstand voltage is applied, it is necessary to find a way to short the CT secondary side to ground.

The traditional short-circuit method is to short-circuit directly on the CT body. The short circuit on the CT body needs to be equipped with a special short wire, and the short circuit is more reliable. The trouble is that the CT body has to be opened, and then it can be shorted internally. Since the CT body is installed at a relatively high position in the GIS, and the number of screws fastening the CT body is relatively large, it is inconvenient to disassemble and assemble, so shorting the CT body is a very time-consuming and laborious solution. Therefore, how to make the CT short-circuit simple and quick, and improve the reliability and work efficiency of the CT short-circuit has become an urgent problem to be solved.

Utility model content

The purpose of this utility model is to solve the above problems, providing a CT secondary side short circuit and a CT secondary side short circuit system, using the CT secondary side short circuit can easily realize the CT secondary side short circuit, simple Safe and convenient.

In order to achieve the above object, the utility model adopts the following technical solutions:

The CT secondary side short wiring includes wires and metal wire clips. There are multiple metal wire clips on the wires. The metal wire clips are in contact with the conductors inside the wires. A test clip is provided at the end of the wires.

The metal clip is welded to the conductor inside the wire. The solder joints are firm and can connect the metal clips to the wires well.

An insulating sheath is provided at the welding place between the metal wire clip and the conductor inside the wire.

The wires are multi-strand flexible wires.

The maximum opening of the test clip is greater than that of the metal wire clip. This test clip is used to connect to the grounding bar, and the grounding bar will be relatively thick, so the type of test clip used is relatively large, so that the reliable grounding of the short wire can be realized.

The metal wire clip adopts a crocodile mouth clip.

A CT secondary-side short-circuit system using the CT secondary-side short-circuit wire, comprising a CT body, the secondary-side terminals in the CT body are led to the current terminal block in the control cabinet through secondary wires, and more The two metal wire clamps are clamped to the terminals on the current terminal block in turn, and the test clamp at the end of the wire is connected to the grounding bar. The electrical conductivity of the metal wire clip is very good, so when clamped on the terminal block, the conduction effect between the metal wire clip and the terminal block is very good.

The beneficial effects of the utility model are:

It is no longer necessary to disassemble the CT body by adopting the short-circuit wire on the secondary side of the CT of the utility model to short-circuit the CT, and the whole short-circuit will save time and effort, and the disassembly and assembly are convenient. At the same time, the versatility of the short wiring is also very strong, not only for the CT in GIS, but also for other CTs with a relatively low installation position and convenient short-circuit on the body, because the metal wire clamp can be reliably and quickly clamped. on the CT terminal. After the test is over, it will be more convenient and quick to remove the short wiring, which improves the work efficiency. Operators do not need to climb to the GIS for high-altitude operations, which virtually improves the safety level of operators.

Description of drawings

Fig. 1 is a structural schematic diagram of the CT secondary side short circuit;

Fig. 2 is a structural schematic diagram of the CT secondary side short circuit system;

Fig. 3 is a schematic diagram of CT longitudinal clamping mode;

Fig. 4 is a schematic diagram of CT cross clipping mode.

Among them, 1. Wire, 2. Solder joint, 3. Metal wire clip, 4. Test clip, 5. Current terminal block.

Detailed ways:

Below in conjunction with accompanying drawing and embodiment the utility model is described further:

As shown in Figure 1, the CT secondary side short wiring includes a wire 1 and a metal wire clamp 3. There are five metal wire clamps 3 on the wire 1. The metal wire clamp 5 is in contact with the conductor inside the wire 1. The end of the wire 1 A test clip 4 is provided.

The metal clamp 3 is welded on the conductor inside the wire 1 . The welding spot 2 is firm, and the metal wire clip 3 and the wire 1 can be well connected. An insulating jacket is provided at the conductor welding place between the metal wire clamp 3 and the inner conductor of the wire 1 . Conductor 1 adopts multi-strand flexible conductor and adopts copper conductor. The maximum opening of the test clip 4 is greater than the maximum opening of the metal wire clamp 3 . This test clip 4 is used to connect to the grounding bar, and the grounding bar will be relatively thick, so the type of test clip 4 used is relatively large, so that the reliable grounding of the short wiring can be realized. The test clip 4 is also welded on the wire 1 . Metal wire clip 4 adopts alligator mouth clip.

As shown in Figure 2, a CT secondary side short circuit system using the CT secondary side short circuit, including a CT body, the secondary side terminal in the CT body is led to the current terminal in the control cabinet through the secondary line On row 5, a plurality of metal wire clips are clamped to the terminals on current terminal row 5 in sequence, and the test clip at the end of the wire is connected to the grounding row. The conductive performance of the metal wire clip is very good, so when clamped on the terminal block, the conduction effect between the metal wire clip and the current terminal block 5 is very good.

Figure 3 and Figure 4 show the clamping method of the metal wire clamped on the current terminal block 5. If the longitudinal space of the current terminal block 5 is sufficient, it can be directly connected sequentially in the manner shown in Figure 3; if the space is not enough, it can be crossed using Figure 4. The way of clamping the thread is staggered.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (7)

1. The CT secondary side short wiring is characterized in that it includes a wire and a metal wire clip, the wire is provided with a plurality of metal wire clips, the metal wire clip is in contact with the conductor inside the wire, and the end of the wire is provided with There is a test clip. 2. The CT secondary side short circuit according to claim 1, wherein the metal clip is welded to the conductor inside the wire. 3 . The CT secondary side short-circuit wire according to claim 2 , wherein an insulating jacket is provided at the welding place between the metal clamp and the conductor inside the wire. 4 . 4. The CT secondary side short-circuit wire according to claim 1, wherein the maximum opening of the test clip is larger than the maximum opening of the metal wire clip. 5. The CT secondary side short-circuit wire according to claim 1, wherein the metal wire clamp is an alligator clip. 6. The CT secondary-side short-circuit wire according to claim 1, wherein the wires are multi-strand flexible wires. 7. A CT secondary side shorting system using the CT secondary side shorting wire according to claim 1, characterized in that it includes a CT body, and the secondary side terminals in the CT body are led to the HSBC through the secondary line On the current terminal block in the cabinet, multiple metal wire clips are clipped to the terminals on the current terminal block in turn, and the test clips at the ends of the wires are connected to the grounding bar.