CN204905454U - Dry -type transformer earthing device - Google Patents

Abstract

The utility model relates to a grounding device for a dry-type transformer, which relates to electrical safety engineering, and comprises a slot plate connected with the cabinet bottom plate of the dry-type transformer. One side plate of the slot plate is connected with a dry-type The connecting terminal connected to the grounding copper wire of the transformer cabinet, the other side of the slot plate is connected with a turning-shaped copper plate, and the turning-shaped copper plate is clamped with a detachable grounding clip for connecting with the three-phase grounding wire. The supporting frame of the detachable grounding clamp is in the shape of a 匚, the upper side horizontal plate of the supporting frame runs through a screw threaded with it longitudinally, and the lower end of the screw is hinged with a lower horizontal plate of the supporting frame to clamp The splint of the tight-turned copper plate. This kind of grounding device has a simple structure without connection, and is convenient for fast grounding of three-phase grounding wires.

Description

Dry-type transformer grounding device

technical field

The utility model relates to a dry-type transformer grounding device, which relates to electrical safety engineering.

Background technique

According to the power safety work regulations, grounding wires should be installed or grounding switches (devices) should be closed for all aspects that may be sent to power failure equipment. In the isolation operation of the transformer from operation to maintenance, the grounding knife switch on the high voltage side is closed, and a set of three-phase grounding wires is installed on the low voltage side. If the high-voltage side cable is too long, in order to prevent residual charges, a set of grounding wires is often installed on the high-voltage side.

Due to the different installation positions of the transformers in the actual situation, it is difficult to install the conductor end of the three-phase ground wire on the ground end when some transformers are overhauled, which seriously affects the work efficiency. There is also a practice of connecting the grounding end of the three-phase grounding wire to the grounding copper wire in the transformer cabinet, but this installation method is slightly irregular, and the second is that the grounding end of the three-phase grounding wire cannot be pressed tightly.

Contents of the invention

The purpose of the utility model is to provide a dry-type transformer grounding device, which has a simple structure without connection and is convenient for fast grounding of three-phase grounding wires.

The technical solution of the utility model lies in: a dry-type transformer grounding device, including a slot plate connected with the cabinet bottom plate of the dry-type transformer, and one side plate of the slot plate is connected with the dry-type transformer through the first transverse bolt. The connecting terminal connected to the grounding copper wire of the cabinet, the other side of the slot plate is connected with a turning-shaped copper plate, and the turning-shaped copper plate is clamped with a detachable grounding clip for connecting with the three-phase grounding wire. The support frame of the detachable ground clamp is in the shape of a 匚, and a screw threaded on the upper horizontal plate of the support frame runs through it longitudinally. The splint of the curved copper plate.

Further, the slot plate is fastened on the bottom plate of the cabinet of the dry-type transformer, and connected with the bottom plate of the cabinet through longitudinal locking bolts.

Further, the upper end of the screw is transversely pierced with a cross bar for rotating the screw, and rubber layers are respectively provided at both ends of the cross bar.

Further, the upper end surface of the lower horizontal plate of the support frame is provided with an anti-slip tooth surface, and the lower side of the splint is provided with an anti-slip tooth surface.

Further, the side of the support is pierced with locking bolts for locking the terminals of the three-phase grounding wires.

Compared with the prior art, the utility model has the following advantages:

The dry-type transformer grounding device is installed on the high and low voltage sides of the transformer cabinet respectively, which is beneficial to shorten the grounding distance. Even the high and low voltage sides are equipped with grounding wires, because there are 2 grounding copper bars, it is easier to install the grounding wire, which is convenient. The daily isolation operation greatly improves the work efficiency, and the installation of the grounding wire is also more beautiful. At the same time, it is easy to manufacture and install, and has good application prospects in hydropower plants.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the enlarged view of A district of Fig. 1 of the present utility model;

In the figure: 1-Slot plate 2-First transverse bolt 3-Second transverse bolt 4-Turn-shaped copper plate 5-Detachable ground clamp 51-Support frame 52-Upper side transverse plate 53-Screw rod 54-Lower side transverse plate 55 - splint 56 - anti-slip tooth surface 6 - longitudinal locking bolt 7 - cross bar 71 - rubber layer 8 - locking bolt.

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific examples are given together with the accompanying drawings and described in detail as follows, but the present invention is not limited thereto.

Refer to Figure 1 and Figure 2

A dry-type transformer grounding device, including a slot plate 1 connected to the bottom plate of the dry-type transformer cabinet, one side plate of the slot plate is connected with a grounding copper wire for the dry-type transformer cabinet through the first transverse bolt 2 Connected terminal 3, the other side of the slot plate is connected with a turning-shaped copper plate 4 via a second transverse bolt 3, and a detachable grounding clip 5 for connecting with a three-phase grounding wire is clamped on the turning-shaped copper plate The support frame 51 of the detachable ground clamp is in the shape of a 匚, and a screw rod 53 screwed to it runs through the upper horizontal plate 52 of the support frame longitudinally. Plate 54 cooperates to grip clamping plate 55 of the elbow-shaped copper plate.

In this embodiment, the slot plate is buckled on the bottom plate of the cabinet of the dry-type transformer, and connected to the bottom plate of the cabinet through longitudinal locking bolts 6 .

In this embodiment, a cross bar 7 for rotating the screw is transversely pierced on the upper end of the screw, and rubber layers 71 are respectively provided at both ends of the cross bar.

In this embodiment, an anti-slip tooth surface 56 is provided on the upper end surface of the lower horizontal plate of the support frame, and an anti-slip tooth surface 56 is provided on the upper lobe of the lower side of the splint.

In this embodiment, the side of the support is pierced with a locking bolt 8 for locking the terminal of the three-phase grounding wire, so as to realize the connection between the three-phase grounding and the grounding clip, so as to transfer the residual charge to the ground.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.

Claims (5)

1. A dry-type transformer grounding device, comprising a slot plate connected to the cabinet bottom plate of the dry-type transformer, characterized in that, one side plate of the slot plate is connected with the dry-type transformer cabinet through the first transverse bolt. The connecting terminal connected with the grounding copper wire, the other side of the slot plate is connected with a turning-shaped copper plate, and the turning-shaped copper plate is clamped with a detachable grounding clip for connecting with the three-phase grounding wire, the detachable The support frame of the grounding clamp is in the shape of a 匚. The upper horizontal plate of the support frame runs through a screw threaded with it in the longitudinal direction. Copper plate splint. 2. The grounding device for a dry-type transformer according to claim 1, wherein the slot plate is fastened on the bottom plate of the cabinet of the dry-type transformer and connected to the bottom plate of the cabinet through longitudinal locking bolts. 3. The dry-type transformer grounding device according to claim 1 or 2, characterized in that, a cross bar for rotating the screw is transversely pierced on the upper end of the screw, and rubber layers are respectively provided at both ends of the cross bar. 4. The dry-type transformer grounding device according to claim 1, wherein the upper end surface of the lower horizontal plate of the support frame is provided with an anti-skid tooth surface, and the lower side of the splint is provided with an anti-skid tooth surface. 5. The grounding device for dry-type transformer according to claim 1 or 4, characterized in that, the side of the support is pierced with locking bolts for locking the terminals of the three-phase grounding wires.