CN203385761U - Wiring clamp for loop resistor measuring and overpressure resistant test - Google Patents

Abstract

The utility model provides a wiring pliers used for loop resistance measurement and withstand voltage test, which comprises a clamping part and an insulating rod connected to the lower end of the clamping part. The clamping part includes: a U-shaped frame; from the inner side of the U-shaped frame, the first spring card and the second spring card are respectively connected between its arc portion and its straight portion, and the first spring card and the second spring Cards form a figure of eight. The middle part of the first spring card is broken into the first section connected with the arc part of the U-shaped frame and the second section connected with the straight part of the U-shaped frame, and the first section and the second section are connected by an insulating plate , A through hole is opened at the connection between the arc part of the U-shaped frame and the first section, and a voltage line connected to the first section is inserted in the through hole, and a connection between the straight part of the U-shaped frame and the second section is provided. The current line interface connected with the second segment. The beneficial effect is that the wiring pliers can conveniently carry out wiring for loop resistance measurement and withstand voltage test without climbing a height.

Description

Wiring pliers for loop resistance measurement and withstand voltage test

technical field

The utility model relates to a wiring pliers, in particular to a wiring pliers used for loop resistance measurement and withstand voltage test.

Background technique

The measurement of the conductive loop resistance of high-voltage electrical equipment is a must-try item after the handover and overhaul of electrical equipment. GB50150-2006 "Electrical Installation Engineering Electrical Equipment Handover Test" and DL/T596-1996 "Preventive Test Regulations for Electric Equipment" all make strict regulations on this, including vacuum circuit breakers, SF6 circuit breakers, SF6 closed combination electrical appliances, etc. The measurement standard of conductive loop resistance of circuit breaker equipment and closed combination electrical appliances is a mandatory provision that must be strictly implemented. In addition, the AC withstand voltage test is also an effective method to test the insulation level of the tested electrical equipment and the ability to withstand various overvoltages, and it is also of great significance to ensure the safe operation of the equipment. It can be seen that how to scientifically and efficiently measure electrical equipment loop resistance and AC withstand voltage test has become one of the key issues in the field of high voltage testing.

Nowadays, loop resistance measurement and AC withstand voltage are carried out in GIS (gas insulated switch hybrid gas insulator switch), HGIS (hybrid gas insulated switch hybrid gas insulator switch), PASS (intelligent combined electrical equipment plug and switch system) and other equipment The test uses a conventional hand-held clamp. During the test, it is necessary for a staff member to hold the clamp to climb the inlet and outlet bushings of GIS and other equipment for wiring. The work tasks are heavy, repetitive, and inefficient; and because GIS , HGIS, and PASS equipment’s special design and construction, the wiring of these two tests can only be clamped through the top of the bushing, and because of the angle problem, even if the wiring clip is used in conjunction with the existing brake lever, the wiring method is not very good. In addition, the exterior of GIS, HGIS, PASS and other equipment is curved and smooth, and the casing is inclined outward, and the installation position is relatively high. The operator must use a ladder to carry out the work, which is labor-intensive and dangerous, and there are serious problems. Security risks. Therefore, effective measures must be taken to reduce climbing operations and improve work efficiency.

In response to such problems, in the article "Retractable High-altitude Test Connector" published by Li Changbing, Zhou Ziming, and An Pingyue in the June 2012 issue of "Rural Electrification", a design scheme for a retractable high-altitude test connector was proposed, which has a certain The rationality, but this design scheme is only suitable for cable-type equipment interfaces, and the scope of application has certain limitations.

Utility model content

Aiming at the above-mentioned problems in the prior art, the utility model provides a wiring pliers for loop resistance measurement and withstand voltage test, which can carry out wiring operations on the ground without the need for operators to climb high.

According to an embodiment of the utility model, the utility model provides a wiring clamp for loop resistance measurement and withstand voltage test, which includes a clamping part and an insulating rod connected to the lower end of the clamping part, and the clamping part includes : U-shaped frame; from the inside of the U-shaped frame, the first spring card and the second spring card respectively connected between its arc part and its straight part, the first spring card and the second spring card form Eight-shaped, wherein the middle of the first spring card is broken into a first section connected with the arc part of the U-shaped frame and a second section connected with the straight part of the U-shaped frame, the first The section and the second section are connected by an insulating plate, and a through hole is opened at the connection between the arc part of the U-shaped frame and the first section, and a through hole is inserted into the first section. The connection between the straight part of the U-shaped frame and the second section is provided with a current line interface conducting with the second section.

Preferably, a connecting screw for connecting a measuring wire and a nut for fixing the connecting screw are arranged in the current wire interface.

Preferably, the insulating board is respectively connected to the first segment and the second segment by screws.

Preferably, the insulating rod is connected to the lower end of the straight part of the U-shaped frame connected to the first spring card.

Preferably, the insulating rod is a telescopic three-section rod.

The beneficial effect of the wiring pliers used for loop resistance measurement and withstand voltage test of the utility model is that, using the wiring pliers, the wiring operator does not need to climb a height, and can hold the first spring piece and the second spring of the wiring pliers on the ground with an insulating rod. The chip is clamped on the outlet bushing clamp of GIS, HGIS, PASS and other equipment for loop resistance measurement and withstand voltage test, which greatly enhances operation safety, reduces the workload of wiring and removal, and can greatly improve work efficiency.

Description of drawings

FIG. 1 is a schematic structural view of the clamping portion of the wiring clamp used for loop resistance measurement and withstand voltage test of the present invention.

Fig. 2 is a side view along the line A-A of Fig. 1 .

Reference signs:

10—U-shaped frame 20—the first spring card 30—the second spring card

21—First section 22—Second section 23—Insulation board 24—Connecting screw

40—voltage wire 50—connecting nut 60—connecting sleeve

Detailed ways

The embodiment of the wiring clamp used for loop resistance measurement and withstand voltage test of the present utility model is now described with reference to the accompanying drawings.

The wiring pliers used for loop resistance measurement and withstand voltage test of the utility model includes a clamping part and an insulating rod connected to the lower end of the clamping part. Fig. 1 shows the clamping part of the clamp, because the insulating rod can use the insulating rod of the known technology, so the insulating rod is not shown. As shown in Fig. 1 and Fig. 2, the clamping part includes: a U-shaped frame 10; from the inner side of the U-shaped frame 10, the first spring card 20 and the second spring card 20 respectively connected between its arc part and its straight part The spring card 30, the first spring card 20 and the second spring card 30 form a figure-eight shape. Wherein the middle of the first spring card 20 is disconnected as the first segment 21 connected with the arc portion of the U-shaped frame 10 and the second segment 22 connected with the straight portion of the U-shaped frame 10, the first segment 21 and the second segment 22 are connected by an insulating plate 23, that is, the first segment 21 and the second segment 22 are insulated. The arc portion of the U-shaped frame 10 and the junction of the first section 21 offer a through hole, and the through hole is inserted with a voltage line 40 conducting with the first section 21, and the straight line portion of the U-shaped frame 10 is connected to the second section 22. The connection of the second section 22 is provided with a current line interface. In this embodiment, for the convenience of wiring, a connection screw (not shown) for connecting a measurement wire and a connection nut 50 for fixing the connection screw may be provided in the current line interface. When the connecting screw is inserted into the current wire interface, it conducts with the second segment 22 , and the connecting nut 50 fixes the measuring wire wound on the connecting screw and conducts with it, thereby measuring the current flowing through the second segment 22 .

When in use, the insulating rod in the known technology is sleeved on the lower end of the clamping part of the wiring pliers through the connecting sleeve 60, and the wiring operator holds the insulating rod on the ground to remove the outlet bushing clamps of GIS, HGIS, PASS and other equipment from the utility model. The middle and lower part of the clamping part of the wiring pliers is upwardly engaged between the first spring card 20 and the second spring card 30 of the utility model wiring pliers, relying on the spring force of the first spring card 20 and the second spring card 30 to tightly Clamp the outlet casing clamps of GIS, HGIS, PASS and other equipment. The special voltage and current wiring boards on the outlet bushing clamps of GIS, HGIS, PASS and other equipment are in contact with the first section 21 and the second section 22 respectively, and then the voltage line 40 and the connecting nut 50 are connected to the wiring pliers The current wire connected to the measuring equipment can conveniently carry out loop resistance measurement (loop resistance measurement requires the use of two wiring pliers of the utility model, respectively clamped at both ends of the electrical equipment under test) and withstand voltage test.

Preferably, the insulating board 23 can be respectively connected to the first section 21 and the second section 22 through connecting screws 24 , and in order to connect firmly, multiple connecting screws 24 are used in this embodiment. Of course, it can also be connected through other known connection methods.

In addition, as shown in FIG. 1 and FIG. 2 , the insulating rod can be connected to the lower end of the straight part of the U-shaped frame 10 connected with the first spring clip 20 , which will be more convenient for operation.

In order to adapt to the operation needs of different heights, the insulating pole can be a telescopic three-section pole.

Using the wiring pliers used for loop resistance measurement and withstand voltage test of the utility model, the wiring operator does not need to climb up to work, and the wiring pliers can be clamped on the outlet bushing clamps of GIS, HGIS, PASS and other equipment on the ground by holding an insulating rod. Loop resistance measurement and withstand voltage test greatly enhance the safety of operation, reduce the workload of wiring and dismantling, and greatly improve work efficiency.

The above is a preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. And retouching should also be regarded as the protection scope of the present utility model.

Claims (5)

1. the jointing clamp for loop resistance measurement and withstand voltage test, comprise clamping part and the insulating bar that is connected to described clamping part lower end, it is characterized in that:

Described clamping part comprises: U-shaped framework; From the inboard of described U-shaped framework, be connected to the first spring card and the second spring card between its arch section and its straight line portion, described the first spring card and the second spring card form splayed,

The centre of wherein said the first spring card is broken as the first paragraph be connected with the arch section of described U-shaped framework and the second segment be connected with the straight line portion of described U-shaped framework, between described first paragraph and second segment, by insulcrete, connect, through hole is offered in the arch section of described U-shaped framework and the junction of described first paragraph

Be inserted with the pressure-wire with described first paragraph conducting in described through hole, the straight line portion of described U-shaped framework and the junction of described second segment are provided with the electric current line interface with described second segment conducting.

2. the jointing clamp for loop resistance measurement and withstand voltage test according to claim 1, is characterized in that, is provided for connecting the connecting screw of measure traverse line in described electric current line interface and for the nut of fixing described connecting screw.

3. the jointing clamp for loop resistance measurement and withstand voltage test according to claim 1, is characterized in that, described insulcrete is connected with second segment with described first paragraph by screw respectively.

4. the jointing clamp for loop resistance measurement and withstand voltage test according to claim 1, is characterized in that, described insulating bar is connected to the lower end that described U-shaped framework is connected with the straight line portion of described the first spring card.

5. the jointing clamp for loop resistance measurement and withstand voltage test according to claim 4, is characterized in that, described insulating bar be can be flexible three pair rod.

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