CN211603266U - DC resistance test wire clamp for low-voltage winding of transformer - Google Patents
DC resistance test wire clamp for low-voltage winding of transformer Download PDFInfo
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- CN211603266U CN211603266U CN201922155807.3U CN201922155807U CN211603266U CN 211603266 U CN211603266 U CN 211603266U CN 201922155807 U CN201922155807 U CN 201922155807U CN 211603266 U CN211603266 U CN 211603266U
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Abstract
The utility model discloses a transformer low voltage winding direct current resistance test fastener relates to transformer equipment technical field, including C type body, C type body includes the vertical fagging of establishhing, both ends are connected with upper plate and hypoplastron respectively about the fagging, be equipped with the screw hole on the upper plate, the double-screw bolt passes through the upper plate through with screw hole threaded connection, the hypoplastron upside is equipped with the fixed block that corresponds with the double-screw bolt position. The utility model discloses can realize satisfying the experimental on-the-spot demand of transformer, carry out effectual resistance measurement to the conducting rod of difference.
Description
Technical Field
The utility model belongs to the technical field of transformer equipment technique and specifically relates to a transformer low voltage winding direct current resistance test fastener is related to.
Background
The transformer is the core equipment of the power system and plays the role of an electric energy transfer station. Any fault of the transformer easily causes the interruption of electric energy transmission in local areas, and directly influences the smooth operation of industrial production. The direct current resistance of the transformer coil is an important index for representing the state of the transformer, so that the running state of the transformer can be effectively judged by accurately measuring the direct current resistance of the transformer coil.
In the conventional test process of the direct current resistance of the transformer, a four-terminal method wiring and 10A current test is generally adopted, and the following equipment is generally required: direct current resistance tester, test wire, binding clip etc..
However, the following problems mainly exist in the conventional direct current resistance test process:
for the accurate measurement transformer winding direct current resistance value, generally will press from both sides in the fingered citron of conducting rod and demolish, directly press from both sides the test wire clamp in conducting rod department, high pressure side, medium voltage side electric current are general less, current fastener can directly press from both sides in conducting rod department, but low pressure side conductor pole is thick, especially to large capacity transformer, low pressure side conductor pole diameter is unusual big, current fastener can't press from both sides in conducting rod department, direct current resistance test accuracy is not high under this kind of condition, the credibility descends. Therefore, the existing transformer direct current resistance test wire clamp needs to be improved urgently to meet the field requirements of transformer tests.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a transformer low voltage winding direct current resistance test fastener, it can realize satisfying the experimental on-the-spot demand of transformer, carries out effectual resistance measurement to the conducting rod of difference.
The utility model provides a its technical problem realize through following technical scheme: the utility model provides a transformer low voltage winding direct current resistance test fastener, includes C type body, C type body includes the vertical fagging of establishhing, both ends are connected with upper plate and hypoplastron respectively about the fagging, be equipped with the screw hole on the upper plate, the double-screw bolt passes through the upper plate through with screw hole threaded connection, the hypoplastron upside is equipped with the fixed block that corresponds with the double-screw bolt position.
Preferably, a handle is arranged on the outer side of the supporting plate.
Preferably, a rotating rod is arranged at the top end of the stud.
As a preferred scheme, the fixing block is punched and connected with a screw to form a wiring terminal, and a wiring head is arranged at the bottom end of the stud.
As a preferable scheme, the bottom end of the stud and the upper surface of the fixing block are made of brass materials.
As a preferable scheme, patterns are arranged at the bottom end of the stud and the upper surface of the fixing block.
Preferably, the vertical distance between the bottom end of the stud and the upper surface of the fixing block is 3 cm-15 cm.
The utility model discloses beneficial effect:
the utility model has the advantages of scientific and reasonable design, can satisfy the test of the direct current resistance of different model transformer windings, when using, the staff passes through the handle and removes the fastener to conducting rod department, make the double-screw bolt move down through rotatory double-screw bolt, make double-screw bolt and fixed block with the conducting rod centre gripping, provide the clamping-force through the double-screw bolt, can guarantee the stability of strength, the rotary rod makes the rotation double-screw bolt more convenient, the work efficiency is improved, binding post makes the wiring more swift, the welding has been avoided, quick wiring and wiring department stability have been guaranteed, can record accurate resistance value, the test accuracy is high, avoided greatly because the retest that the restriction of test clamp opening caused, the work load of staff has been alleviateed, the work efficiency is improved, the transformer power off time has been shortened.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic side view of the structure of the present invention;
FIG. 3 is a schematic view of the working flow of the present invention;
in the figure: 1. a C-shaped body; 2. a supporting plate; 3. an upper plate; 4. a lower plate; 5. a stud; 6. rotating the rod; 7. a connector lug; 8. a fixed block; 9. a conductive rod; 10. and a terminal.
Detailed Description
Example 1:
with reference to the attached drawings of the specification, the direct current resistance testing clamp for the low-voltage winding of the transformer comprises a C-shaped body 1, wherein the C-shaped body 1 comprises a vertically arranged supporting plate 2, the upper end and the lower end of the supporting plate 2 are respectively connected with an upper plate 3 and a lower plate 4, a threaded hole is formed in the upper plate 3, a stud 5 penetrates through the upper plate 3 through being in threaded connection with the threaded hole, and a fixing block 8 corresponding to the position of the stud 5 is arranged on the upper side of the lower plate 4.
Preferably, a handle is arranged on the outer side of the supporting plate 2.
Preferably, a rotating rod 6 is arranged at the top end of the stud 5.
As a preferable scheme, a hole is punched in the fixing block 8 to connect with a screw to form a wiring terminal 10, and a wiring terminal 7 is arranged at the bottom end of the stud 5.
Preferably, the bottom end of the stud 5 and the upper surface of the fixing block 8 are made of brass.
Preferably, patterns are arranged at the bottom end of the stud 5 and the upper surface of the fixing block 8.
Preferably, the vertical distance between the bottom end of the stud 5 and the upper surface of the fixing block 8 is 3 cm-15 cm.
The method for testing the direct current resistance of the low-voltage winding of the transformer comprises the following steps:
(1) an operator holds the wire clamp by hand, rotates the rotating rod 6 according to the diameter of the conducting rod 9, and adjusts the distance between the bottom end of the stud 5 and the upper surface of the fixing block 8;
(2) the operator clamps the wire clamp at the conductive rod 9 and screws the wire clamp by adjusting the rotating rod 6;
(3) the operator inserts the electric wire through the wiring terminal 10 and the wiring connector 7;
(4) another worker performs the test by operating a resistance tester connected to the other end of the wire.
The utility model has the advantages of scientific and reasonable design, can satisfy the test of the direct current resistance of different model transformer windings, when using, the staff passes through the handle and removes the fastener to conducting rod 9 department, make the double-screw bolt move down through rotatory double-screw bolt 5, make double-screw bolt 5 and fixed block 8 with conducting rod 9 centre gripping, provide the clamping-force through double-screw bolt 5, can guarantee the stability of strength, it is more convenient that rotary rod 6 makes rotation double-screw bolt 5, the work efficiency is improved, binding post 10 makes the wiring more swift, the welding has been avoided, quick wiring and wiring department stability have been guaranteed, can record accurate resistance value, the test precision is high, avoided greatly because the retest that the test clamp opening restriction caused, the work load of staff has been alleviateed, the work efficiency is improved, the transformer power failure time has been shortened.
The utility model discloses can adjust 5 bottoms of double-screw bolt and 8 upper surface distances of fixed block in a flexible way, maximum distance reaches 15cm, is applicable to large capacity transformer low voltage winding direct current resistance test.
The bottom end of the stud 5 and the upper surface of the fixing block 8 are designed to be rough, so that the contact area with the conducting rod is increased, and the reduction of the test accuracy caused by poor contact is reduced.
The contact point between the bottom end of the stud 5 and the upper surface of the fixing block 8 and the conducting rod 9 is made of brass material, the internal resistance of the stud is almost 0 through measurement, and the interference on the test result is avoided to the maximum extent.
This patent develops a general large capacity transformer low voltage winding direct current resistance test fastener, under the condition that does not change original test principle, the accurate measurement low voltage winding direct current resistance gets rid of unusual interference data, ensures the safety and stability of transformer and puts into operation, improves the power supply reliability.
In the embodiment, a transformer with the capacity of 220kV is selected, and the direct current resistance of a low-voltage winding of the transformer is tested, and the steps are as follows:
firstly, a transformer is powered off, tested and safety measures are made;
secondly, removing three side connecting wires of the transformer and keeping a sufficient testing distance;
then, the electric wires are respectively connected into the connector lug 7 and the wiring terminal 10, the distance between the stud 5 and the fixing block 8 is adjusted through rotation, the conducting rod 9 is clamped in the middle of the stud, the stud is in good contact with the conducting rod 9, and then testing is carried out.
The test precision can meet the requirements, repeated tests caused by the fact that the opening of the test clamp is limited and the conducting rod 9 is not matched are greatly avoided, the workload of workers is reduced, the working efficiency is greatly improved, and the power failure time of the transformer is shortened.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (7)
1. The utility model provides a transformer low voltage winding direct current resistance test fastener, its characterized in that, includes C type body (1), C type body (1) is including vertical fagging (2) of establishhing, both ends are connected with upper plate (3) and hypoplastron (4) respectively about fagging (2), be equipped with the screw hole on upper plate (3), double-screw bolt (5) are through running through upper plate (3) with screw hole threaded connection, hypoplastron (4) upside is equipped with fixed block (8) that correspond with double-screw bolt (5) position.
2. The clamp for testing the direct-current resistance of the low-voltage winding of the transformer as claimed in claim 1, wherein a handle is arranged on the outer side of the supporting plate (2).
3. The direct-current resistance test clamp for the low-voltage winding of the transformer according to claim 1, wherein a rotating rod (6) is arranged at the top end of the stud (5).
4. The direct-current resistance test clamp for the low-voltage winding of the transformer according to claim 1, wherein a fixing block (8) is provided with a hole and a screw to form a wiring terminal (10), and a wiring head (7) is arranged at the bottom end of the stud (5).
5. The transformer low-voltage winding direct-current resistance test clamp according to claim 1, characterized in that the bottom end of the stud (5) and the upper surface of the fixing block (8) are made of brass.
6. The transformer low-voltage winding direct-current resistance test clamp according to claim 1, characterized in that patterns are arranged on the bottom end of the stud (5) and the upper surface of the fixing block (8).
7. The direct-current resistance test clamp for the low-voltage winding of the transformer according to claim 1, wherein the vertical distance between the bottom end of the stud (5) and the upper surface of the fixing block (8) is 3 cm-15 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922155807.3U CN211603266U (en) | 2019-12-05 | 2019-12-05 | DC resistance test wire clamp for low-voltage winding of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922155807.3U CN211603266U (en) | 2019-12-05 | 2019-12-05 | DC resistance test wire clamp for low-voltage winding of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211603266U true CN211603266U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922155807.3U Active CN211603266U (en) | 2019-12-05 | 2019-12-05 | DC resistance test wire clamp for low-voltage winding of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211603266U (en) |
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2019
- 2019-12-05 CN CN201922155807.3U patent/CN211603266U/en active Active
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