CN203745638U - Novel short connection insert block used for secondary terminal bar of voltage transformer - Google Patents

Abstract

The utility model provides a novel short connection insert block used for a secondary terminal bar of a voltage transformer. The novel short connection insert block is designed for the secondary terminal bar of the voltage transformer. The secondary terminal bar is provided with jacks arranged uniformly and connected with lead-out leads. The short connection insert block is characterized by comprising a cuboid conducting rod; conducting pins are arranged on a side of the cuboid conducting rod uniformly from top down; the distance between each two conducting pins is identical to the distance between each two jacks in the secondary terminal bar. The length and the diameter of each conducting pin are matched to the size of each hole in the secondary terminal bar. By adopting the novel short connection insert block provided by the utility model, short connection speed of the secondary terminal bar of the voltage transformer can be improved substantially and time required for metering characteristics of the voltage transformer (110kV and above) can be reduced by about 30%. Therefore, time cost can be reduced effectively and working efficiency is improved.

Description

A new type of voltage transformer secondary terminal row short-circuit plug-in block

technical field

The utility model belongs to the technical field of electric energy measurement, in particular to a new type of short-terminal plug-in block for a secondary terminal row of a voltage transformer. the

Background technique

In the on-site verification of voltage transformers of 110kV and above, according to the requirements of the metrological verification regulations, it is necessary to add 1.15 times the rated primary voltage to the primary side of the voltage transformer, so a certain amount of current will be generated in the primary circuit of the voltage transformer. When the voltage reaches 1.15 times the rated voltage, the current in the primary circuit will usually cause the voltage transformer in the primary circuit to generate an overvoltage sufficient to destroy its junction level when the secondary side is open. Similar to the voltage transformer test, the current transformer test needs to pass a current 1.2 times the rated current in the primary circuit (traditional verification method), the current is larger than the voltage transformer test, and the hazards caused by the open circuit of the secondary circuit of the current transformer It is more serious, and may cause equipment damage or even personal injury or death in severe cases. Therefore, in the test, the secondary circuit of the current transformer in the test primary circuit must be short-circuited to prevent the secondary insulation from being damaged due to overvoltage during the test. the

The current test method is to short-circuit the windings one by one with ordinary double-ended short-circuit wires at the terminal block of the current transformer that needs a secondary short circuit. However, since there are usually multiple current transformers with different purposes connected to the primary circuit, and each current transformer has multiple different windings, the number of secondary terminals that need to be short-circuited is very large, and the current method takes a long time. Usually, the secondary circuit short-circuit time accounts for about 45% of the total test time. the

Contents of the invention

The purpose of this utility model is to propose a new type of voltage transformer secondary terminal row short-circuit plug-in block for the deficiencies of the prior art. the

The utility model solves its technical problem and realizes by taking the following technical solutions:

A new type of short-terminal block for secondary terminal blocks of voltage transformers. The short-terminal block is designed for the secondary terminal blocks of voltage transformers. The wire connection is characterized in that: the short-circuit plug block includes a rectangular parallelepiped conductive rod, and conductive pins are uniformly formed on one side of the rectangular parallelepiped conductive rod from top to bottom, and the distance between every two conductive pins is the same as the secondary The distance between the holes on the terminal block is the same, and the length and diameter of the conductive pins match the size of the holes on the secondary terminal block. the

Moreover, the number of the conductive pins is the same as the number of sockets on the secondary terminal block of the voltage transformer. the

Moreover, an insulating rubber layer is adhered to the upper and lower ends of the rectangular parallelepiped conductive rod and the surface of the conductive rod on the opposite side of the conductive pin. the

The advantages and positive effects of the present utility model are

1. The utility model will greatly improve the short-circuit speed of the secondary terminal block of the current transformer, and reduce the time required for the measurement characteristic test of the voltage transformer of 110kV and above by about 30%, effectively saving time and cost, and improving work efficiency. the

2. The utility model is reasonable in structure, safe in use, and improves the safety of experiments. the

Description of drawings

Figure 1 is a schematic diagram of the structure of the secondary terminal block of the voltage transformer;

Fig. 2 is a schematic structural view of the utility model. the

Detailed ways

The implementation of the utility model will be described in further detail below in conjunction with the accompanying drawings. The following examples are only descriptive, not restrictive, and cannot limit the protection scope of the utility model. the

A new type of voltage transformer secondary terminal row short-circuit plug block, as shown in Figure 1, the short-circuit plug block is designed for the voltage transformer secondary terminal block 1, and the secondary terminal block is equipped with evenly arranged plugs Hole 2, the jack is connected to the lead wire 3, the short-circuit plug block includes a rectangular parallelepiped conductive rod 5, and conductive pins 6 are uniformly formed on one side of the rectangular parallelepiped conductive rod from top to bottom, and between each two conductive pins The spacing between them is the same as the distance between the jacks on the secondary terminal block, and the length and aperture of the conductive pins match the size of the jacks on the secondary terminal block. the

In the specific implementation of the utility model, the number of the conductive pins is the same as the number of jacks on the secondary terminal block of the voltage transformer. the

In the specific implementation of the utility model, an insulating rubber layer 4 is adhered to the upper and lower ends of the cuboid conductive rod and the surface of the conductive rod on the opposite side of the conductive pin. the

Claims (3)

1. a novel voltage mutual inductor secondary terminals is arranged shorting stub inserted block, this shorting stub inserted block is to design for voltage transformer secondary terminal row, on secondary terminals row, be shaped with the jack that even system is arranged, jack with draw wire and be connected, it is characterized in that: this shorting stub inserted block comprises rectangular parallelepiped contact rod, a side at rectangular parallelepiped contact rod is evenly shaped with conductive pin from top to bottom, spacing between described every two conductive pin is identical with the upper jack distance of secondary terminals row, and the size of the length of conductive pin and diameter and the upper jack of secondary terminals row matches.

2. novel voltage mutual inductor secondary terminals row shorting stub inserted block according to claim 1, is characterized in that: the number of described conductive pin is identical with the jack number on voltage transformer secondary terminal row.

3. novel voltage mutual inductor secondary terminals row shorting stub inserted block according to claim 1, is characterized in that: the contact rod surface of tossing about in upper and lower end parts and the conductive pin of described rectangular parallelepiped contact rod is bonded with electro-insulating rubber layer.