CN203178317U - Metal drew string type clamp for switch cabinet test - Google Patents

Abstract

The utility model relates to a metal strap-type clamp for switchgear testing, which has a simple structure and is convenient to use. A metal strap is passed through the inside of a positioning part to form a ring structure, which is sheathed on a GIS switch. The bulkhead connecting rod used in any phase cable connection hole in the cabinet is pulled up and tightened, and the position is fixed by the buckle on the positioning part, so as to realize the reliable connection and conductive contact between the drawstring and the bulky connecting rod; the external short The wiring is connected to the short wiring interface and conducted through the metal strap to realize the conductive contact with the bulky connecting rod to form the short circuit required for the high current test.

Description

Metal drawstring clips for switchgear testing

technical field

The utility model relates to a testing device in the field of electric power, in particular to a metal belt-drawing clip for high-current testing of a GIS switch cabinet.

Background technique

Generally, during the acceptance process of new substations and switching stations, relay protection staff need to conduct high-current tests on rheology and related secondary and tertiary circuits. The high-current test is to artificially pass a current similar to the actual operation in the primary side line, and when conditions permit, the voltage with the same phase as the primary side can be connected to the secondary side voltage changer at the same time, thereby simulating the actual power station live operation. In order to check whether the relay protection and automation components are running normally, and whether the rheological and secondary circuit wiring is correct.

During the high-current test, it is necessary to connect the high-current generator (or power generator) through the three-phase cable connector of one of the outlets, and short-circuit the three-phase cable connectors on the outlet side of the other warehouses and ground them reliably (that is, Short). However, different voltage levels and insulation types of switch cabinets have different terminal conditions. At present, there are no special short-circuit tools. Usually, only self-made tools such as grounding wires, self-made aluminum network cables, and self-made copper bars can be used for short-circuiting.

These self-made tools are often of different lengths and thicknesses, and there is no uniform standard, which can easily lead to overheating of the wires due to excessive current; or, the self-made short-circuited wires have no insulation layer, and there is a risk of electric shock; or, when using the method of manually winding the outlet joints When short-circuiting, it is easy to cause unreliable contact and wire drop-off, which affects the accuracy of the test. As for the GIS cabinet (Gas Insulated Switchgear, gas insulated switchgear), because the test bulkhead connection rod is short, it cannot be short-circuited by winding short wires, and it is often necessary to use tools such as manually bent copper bars to insert GIS cables. In the connector, it is inconvenient and unsafe, and may damage the cable terminal hole.

Therefore, it is inconvenient, irregular, and not safe to use existing self-made tools for short-circuiting during high-current tests.

Utility model content

The purpose of this utility model is to provide a metal drawstring clip for high current test of GIS switch cabinet, which is safe, reliable, easy to use and easy to carry; It is connected to the bulky connecting rod of the three-phase cable in any one of the positions to realize reliable contact of the short circuit.

In order to achieve the above object, the technical solution of the present utility model is to provide a metal drawstring clip for switchgear testing, the clip includes a metal drawstring, and a positioning piece is arranged at the first end of the drawstring. The second end of the drawstring passes through the interior of the positioning piece to form a ring structure, and the ring structure formed by the drawstring can be set on the bulkhead connecting rod used in the three-phase cable connection hole in the GIS switch cabinet , after tightening the drawstring to tighten the bulkhead connecting rod, the reliable connection and conductive contact between the drawstring and the bulkhead connecting rod can be realized; the end of the second end of the drawstring is also provided with a short wiring interface for connecting The external shorting wire enables the shorting wire to be in conductive contact with the bulkhead connecting rod through the shorting wire interface and the draw strap, so as to form a shorting circuit required for a large current test.

The position where the drawstring passes through the positioning part is provided with a locking tooth; the positioning part is provided with a buckle and an active button connected to each other, and the buckle is released when the active button is pressed, so that the drawer The belt can be moved in the positioner, thereby adjusting the diameter of the loop formed by the drawstring to accommodate the diameter of the blunt connecting rod inside the loop; and when the movable button is released, the buckle can Clamp one of the teeth on the drawstring to fix the position of the drawstring, and then fasten the bulkhead connecting rod.

Preferably, the drawstring is formed by braiding multiple strands of fine soft copper wires.

Preferably, the short connection interface is a socket in the form of a female head, and the short connection is provided with a male wire joint that can be inserted into the socket to realize conductive contact between the wire joint and the drawstring.

Compared with the prior art, the advantage of the metal drawstring clip described in the utility model is that: when detecting any position of the GIS switch cabinet in a large current test, the clip described in the utility model has a simple structure and is easy to use. Pass a metal drawstring through the inside of the positioning part to form a ring-shaped structure, so that the ring-shaped structure is placed on the bulkhead connecting rod used in any phase cable wiring hole in the GIS switch cabinet, and then tightened, and the positioning The buckle on the part is used to fix the position, so as to realize the reliable connection and conductive contact between the drawstring and the bulkhead connecting rod; Conductive contact to form a short circuit required for high current tests.

Description of drawings

Fig. 1 is a structural schematic diagram of the metal belt drawer clip described in the present invention.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing.

The large current test is mainly carried out in stations of 110 kV and below, for substations, 10 kV switch compartments, switch cabinets, GIS cabinets of switch stations and GIS cabinets of 35 kV switch stations. 100A rated current (eg 80A~100A).

And the metal drawstring clip described in the utility model is especially applicable to the high current test carried out for the GIS switch cabinet. The bulky connecting rod corresponds to the connection and reliable contact.

As shown in FIG. 1 , the clip of the present invention includes a positioning piece 2 with a buckle 3 , a metal drawstring 1 , and a short wiring interface 6 . Wherein, the positioning part 2 is arranged on the first end of the drawstring 1, and the second end of the drawstring 1 passes through the inside of the positioning part 2 to form a ring structure, and the ring structure of the metal drawstring 1 can be set on the GIS On the round bulkhead connecting rod commonly used in the switchgear, so as to realize the reliable connection and sufficient conductive contact between the two.

For a bulkhead connecting rod with a diameter between 30mm and 40mm, it can be designed with a width of 20mm and a thickness of about 2mm, and a metal drawstring 1 with a matching length is connected and in contact with it. In order to be able to function as a wire, the metal drawstring 1 should be formed by braiding multiple thin soft copper wires (pure copper braid).

On the outer side of the position where the metal drawstring 1 passes through the positioning member 2, a locking tooth 5 is provided. The positioning part 2 is also provided with a movable button 4 connected to the buckle 3, and the buckle 3 can be released when the movable button 4 is pressed, so that the drawstring 1 can move in the positioning part 2, thereby Adjust the size of the ring structure formed by the drawstring 1 to fasten the bulky connecting rods of different diameters; and after the movable button 4 is released, the buckle 3 can firmly clamp a certain card on the metal drawstring 1 The teeth 5 are used to fix the position of the metal drawstring 1.

The short connection interface 6 is located at the end of the second end of the metal drawstring 1 and is reliably connected with the metal drawstring 1 . The short wire interface 6 is set in the shape of a jack for reliable connection when the short wire is inserted. Preferably, the socket of the short connection interface 6 can be designed as a female connector, then when the male connector on the short connector is inserted into the socket from the outside, the conductive contact between the conductor connector and the metal strap 1 can be realized.

When detecting any position of the GIS switchgear in the high-current test, use three clips of the above structure as ABC three-phase clips at the same time, which can be distinguished by the different colors of the metal drawstring 1 (for example, yellow, green, and red). Insert the wire connector of the ABC three-phase short connection into the corresponding short connection interface 6; and, connect the metal drawstrings 1 of these three clips to the corresponding bulkhead connected in the ABC three-phase cable connection hole in the GIS switch cabinet Tighten the connecting rod to achieve reliable conductive contact between the corresponding short wire and the bulky connecting rod to form a short circuit.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.

Claims (4)

1. a switch cubicle test is taken out the belt clip with metal, it is characterized in that, what described clip comprised metal takes out band (1), be provided with keeper (2) at described first end of taking out band (1), described second end of taking out band (1) passes to form a ring texture from the inside of this keeper (2), take out the ring texture that band (1) forms and to be enclosed within on the silently pitman that uses in the threephase cable wiring hole in the GIS switch cubicle by described, taking out the tight described band (1) of taking out with after tightening silently pitman, that can realize taking out band (1) and pitman silently reliably is connected and conducts electricity contact; Also be provided with shorting stub interface (6) at the described end of taking out band (2) second ends, in order to connect outside shorting stub, make described shorting stub and to take out band (2) via described shorting stub interface (6), realize contacting with the conduction of pitman silently required short circuit loop during with the formation cranking test.

2. switch cubicle test as claimed in claim 1 is taken out the belt clip with metal, it is characterized in that,

Describedly take out the position that band (1) passes keeper (2) and be provided with latch (5); Described keeper (2) is provided with buckle (3) and the active button (4) that is connected, buckle (3) is released when pressing described active button (4), can in keeper (2), move so that take out band (1), thereby adjust by the diameter of taking out the described ring texture that band (1) forms, to adapt to the diameter of the silently pitman that is positioned at described ring texture; And after decontroling active button (4), buckle (3) can block one of them described latch (5) of taking out on the band (1), realizing taking out fixing of band (1) position, and then the general silently pitman tighten.

3. switch cubicle test as claimed in claim 1 is taken out the belt clip with metal, it is characterized in that,

The described band (1) of taking out is formed by the soft copper cash establishment of multiply.

4. switch cubicle test as claimed in claim 1 is taken out the belt clip with metal, it is characterized in that,

Described shorting stub interface (6) is the jack of female form, and the terminal that shorting stub is provided with the male form can insert in this jack, realizes that terminal contacts with the conduction of taking out band (1).