CN203813175U - Substation PT equipment grounding wire device - Google Patents

Abstract

The utility model relates to a grounding wire device for PT equipment in a substation, which is characterized in that five terminal posts A, B, C, L, and N are arranged side by side on a base plate, and each terminal post is connected with a terminal on the edge of the base plate. The five terminals A, B, C, L, and N in the external terminal block correspond to electrical connections. The device of the utility model can be installed in the secondary terminal box of the PT equipment in the substation, and can be used commonly in the secondary terminal box of the PT equipment of various voltage levels. It has a simple structure and is convenient to install and use.

Description

Substation PT equipment grounding wire device

technical field

The utility model relates to a grounding device for electric power equipment, in particular to a grounding wire device for PT equipment in a substation.

Background technique

The substations of each voltage level in the transmission network are equipped with PT equipment (voltage transformers). According to the requirements of standardized operation specifications, when this type of equipment is undergoing repair and test operations, in addition to installing grounding wires on the primary side, the secondary side should also be installed. Short-circuit the grounding wire to prevent accidents of personal electric shock or equipment damage once the test voltage is accidentally applied to the secondary side or the secondary air switch is mistakenly closed to send the parallel power to the PT during the repair and test operation. At present, the main problems in installing the short-circuit grounding wire on the secondary side are: the short-circuit wire is directly connected to the screw of the secondary terminal with an alligator clip, the contact surface of the connection is small, the connection is unreliable, and it is easy to fall off; the terminal in the secondary terminal box Many, the five terminals (A, B, C, L, N) used for grounding short circuit are not arranged together in design, and the operator needs to check and search carefully according to the line number when operating, which consumes time and It is also prone to errors, especially for the secondary system of voltage transformers that implement parallel operation mode, which may cause equipment operation accidents; the wiring blocks of short-circuit grounding wires are different in style, there are wire crimping terminal blocks and jack crimping The wire terminal block has different requirements for the short-circuit grounding wire, which is not easy to manage.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the existing devices and provide a grounding wire device for PT equipment in substations.

The purpose of this utility model is achieved in this way: a grounding wire device for substation PT equipment, which is characterized in that five terminal posts A, B, C, L, and N are arranged side by side on a base plate, and each terminal post is connected to the set The five terminals A, B, C, L and N in the external terminal row at the edge of the base plate correspond to electrical connections, and the three terminals of A, B and C are respectively provided with live indicator lights connected thereto.

The charged indicator lights are controlled by a switch, and each indicator light is provided with a safety device.

The device of the utility model can be installed in the secondary terminal box of the PT equipment in the substation, and can be used in the secondary terminal box of the PT equipment of various voltage levels; its installation and use can be performed without changing or affecting the technical standards and safety of the original design. Under standard conditions, the secondary short-circuit grounding operation of PT equipment is standardized as the same standard procedure; its structure is simple, and it is easy to install and use.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention and its connection with the secondary terminal block of PT equipment;

Fig. 2 is a schematic diagram of the electrical connection of the present invention.

Detailed ways

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

As shown in Figures 1 and 2, five terminal posts A, B, C, L, and N are arranged side by side on the panel of the base plate 1, and the five terminal posts are used to connect to the short-circuit ground wire. One edge of the base plate is provided with an external terminal block 2, and the terminal block is provided with five terminals A, B, C, L, and N, and the five terminals are electrically connected to the five terminal posts respectively. Next to the three terminal posts A, B, and C, there is a live indicator LED connected to the terminal post, which is used to display the live state, which can save the power inspection step and save the time for power failure switching operation. The charged indicator light is controlled by switch K, and a fuse F is provided to protect the indicator light.

When in use, install the base plate of the present utility model at an appropriate position in the secondary terminal box of the PT equipment in the substation, and each terminal of the terminal row of the base plate corresponds to the A, B, C, L, and N terminals of the secondary terminal box of the PT equipment through lead wires Electrical connections. When it is necessary to install a short-circuit ground wire on the secondary side of the repair and test operation, the ground wire can be directly connected to the terminal on the base.

Claims (2)

1. a substation PT kind equipment grounding wire device, it is characterized in that being provided with side by side A, B, C, L, five binding posts of N on a bedplate, each binding post and the corresponding electrical connection of five terminals of A, B, C, L, N being arranged in the external wiring terminal row of bedplate edge, be respectively provided with connected charged indicator light by A, B, tri-binding posts of C.

2. substation PT kind equipment grounding wire device according to claim 1, it is characterized in that described charged indicator light controlled by a switch, and each indicator light is equipped with safeties.