CN204116590U - Current transformer short time thermal current testing table - Google Patents
Current transformer short time thermal current testing table Download PDFInfo
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- CN204116590U CN204116590U CN201420664695.9U CN201420664695U CN204116590U CN 204116590 U CN204116590 U CN 204116590U CN 201420664695 U CN201420664695 U CN 201420664695U CN 204116590 U CN204116590 U CN 204116590U
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- compact heap
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a kind of current transformer short time thermal current testing table, its installing plate is provided with two through holes, two back-up blocks are fixed on the end face of installing plate, between two back-up blocks, there is gap, the bottom surface of guide table is fixed on the end face of installing plate, the middle part of guide table is provided with vertical slideway, one end and the vertical slideway of orienting lug are slidably connected, the other end of orienting lug is fixedly connected with U-shaped compact heap, the bottom of screw mandrel is threaded with the top of U-shaped compact heap, the top of screw mandrel is connected with the screw top of guide table, two seal faces bottom U-shaped compact heap are corresponding with two back-up blocks, the top of each copper bar is fitted in the end face of corresponding back-up block, the bottom of each copper bar passes corresponding through hole, the input end of pressure regulator connects power supply, and the output terminal of pressure regulator connects the input end of current lifting device, and two output terminals of current lifting device connect the bottom of corresponding copper bar respectively.The utility model can improve the short time thermal current test efficiency of current transformer.
Description
Technical field
The utility model relates to electric-power metering Calibration Technology field, refers to a kind of current transformer short time thermal current testing table particularly.
Background technology
Along with the transmission capacity of China's electric system is increasing, the capacity of short circuit of system also increases fast.The rated short time thermal current (hereinafter referred to as short time thermal current) of the current transformer that China produced in the past is according to power system short circuit capacity design at that time, and its value is all smaller.At present, this change does not cause the hig diligence of the relevant personnel to the hidden danger that the safe operation of electric system brings, and the more not timely short time thermal current to operating current transformer carries out checking the current transformer that also replacing does not in time meet the demands.Often there is the explosion accident of current transformer in each electrical network, cause many unnecessary losses, this explosion accident not only can cause the damage of current transformer itself, but also can cause the damage of the miscellaneous equipments such as isolating switch, and the loss of each accident is all more serious.Therefore, the selection of current transformer short time thermal current and check work seem particularly important.At present also not to the specialized equipment that the short time thermal current of current transformer detects, in conventional test mode, all need to carry out wiring by between tested current transformer and current lifting device before each test, wiring process is loaded down with trivial details, consuming time longer, reduce test efficiency.
Utility model content
The purpose of this utility model will provide a kind of current transformer short time thermal current testing table exactly, and this testing table can realize testing the short time thermal current of busbar formula low-voltage current mutual inductor, and has higher test efficiency.
For realizing this object, current transformer short time thermal current testing table designed by the utility model, it is characterized in that: it comprises pressure regulator, current lifting device and thread depressing mechanism, wherein, described thread depressing mechanism comprises insulated mounting plate, insulation guide table, insulate U-shaped compact heap, insulation orienting lug, screw mandrel, two dielectric support block and two copper bars, described insulated mounting plate offers two through holes, described two dielectric support block are fixed on the end face of insulated mounting plate, between two dielectric support block, there is gap, the bottom surface of insulation guide table is fixed on the end face of insulated mounting plate, the middle part of described insulation guide table is provided with vertical slideway, one end and the vertical slideway of described insulation orienting lug are slidably connected, the other end of insulation orienting lug is fixedly connected with the U-shaped compact heap of insulation, the bottom of described screw mandrel is threaded with the top of the U-shaped compact heap of insulation, the top of described screw mandrel is connected with the screw top of insulation guide table, two seal faces bottom the U-shaped compact heap of described insulation are corresponding with two dielectric support block, the top of described each copper bar is fitted in the end face of corresponding dielectric support block, the bottom of each copper bar passes corresponding through hole,
The input end of described pressure regulator connects power supply, and the output terminal of pressure regulator connects the input end of current lifting device, and two output terminals of current lifting device connect the bottom of corresponding copper bar respectively.
When the utility model uses, only tested busbar formula low-voltage current mutual inductor need be arranged between two dielectric support block, by the secondary side short circuit of busbar formula low-voltage current mutual inductor, the seal face of the primary side of busbar formula low-voltage current mutual inductor by the U-shaped compact heap that insulate is crimped together with corresponding copper bar, can start to carry out the test of current transformer short time thermal current, simplify the wiring process of busbar formula low-voltage current mutual inductor and current lifting device output terminal, improve the efficiency of busbar formula low-voltage current mutual inductor short time thermal current test.
Accompanying drawing explanation
Fig. 1 is using state structural representation of the present utility model;
Fig. 2 is the structural representation after thread depressing mechanism of the present utility model has installed short-circuit board;
Fig. 3 is the structural representation of insulated mounting plate of the present utility model.
Wherein, 1-pressure regulator, 2-current lifting device, 3-thread depressing mechanism, 3.1-insulated mounting plate, 3.2-insulation guide table, the 3.3-U-shaped compact heap that insulate, 3.4-insulation orienting lug, 3.5-screw mandrel, 3.6-handwheel, 3.7-dielectric support block, 3.8-copper bar, 3.9-vertical slideway, 3.10-seal face, 3.11-through hole, 3.12-metal short-circuit board, 3.13-wiring hole, 4-busbar formula low-voltage current mutual inductor.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Current transformer short time thermal current testing table as shown in Figures 1 to 3, it is characterized in that: it comprises pressure regulator 1, current lifting device 2 and thread depressing mechanism 3, wherein, described thread depressing mechanism 3 comprises insulated mounting plate 3.1, insulation guide table 3.2, insulate U-shaped compact heap 3.3, insulation orienting lug 3.4, screw mandrel 3.5, two dielectric support block 3.7 and two copper bars 3.8, described insulated mounting plate 3.1 offers two through holes 3.11, described two dielectric support block 3.7 are fixed on the end face of insulated mounting plate 3.1, between two dielectric support block 3.7, there is gap, the bottom surface of insulation guide table 3.2 is fixed on the end face of insulated mounting plate 3.1, the middle part of described insulation guide table 3.2 is provided with vertical slideway 3.9, one end and the vertical slideway 3.9 of described insulation orienting lug 3.4 are slidably connected, the other end of insulation orienting lug 3.4 is fixedly connected with the U-shaped compact heap 3.3 of insulation, the bottom of described screw mandrel 3.5 is threaded with the top of the U-shaped compact heap 3.3 of insulation, the top of described screw mandrel 3.5 is connected with the screw top of insulation guide table 3.2, two seal faces 3.10 bottom the U-shaped compact heap of described insulation 3.3 are corresponding with two dielectric support block 3.7, the top of described each copper bar 3.8 is fitted in the end face of corresponding dielectric support block 3.7, the bottom of each copper bar 3.8 passes corresponding through hole 3.11,
The input end of described pressure regulator 1 connects power supply, and the output terminal of pressure regulator 1 connects the input end of current lifting device 2, and two output terminals of current lifting device 2 connect the bottom of corresponding copper bar 3.8 respectively.
In technique scheme, the top of described screw mandrel 3.5 is provided with handwheel 3.6.Above-mentioned handwheel 3.6 rotates for operating screw mandrel 3.5, and then realizes moving up and down of U-shaped compact heap 3.3.
In technique scheme, it also comprises the metal short-circuit board 3.12 that can be communicated with two copper bars 3.8.Metal short-circuit board 3.12 on pretreatment by two copper bar 3.8 short circuits, to make pressure regulator rapid pressure.
In technique scheme, the bottom of described each copper bar 3.8 all offers wiring hole 3.13, and two output terminals of current lifting device 2 connect the wiring hole 3.13 of corresponding copper bar 3.8 respectively by wire.
When the utility model carries out the test of current transformer short time thermal current, first by U-shaped compact heap 3.3, metal short-circuit board 3.12 is crimped between each copper bar 3.8, pressure regulator 1 now makes current lifting device 2 have big current, then unclamp U-shaped compact heap 3.3 and take out metal short-circuit board 3.12, busbar formula low-voltage current mutual inductor 4 is put between two dielectric support block 3.7, and by the secondary side short circuit of busbar formula low-voltage current mutual inductor 4, control U-shaped compact heap 3.3 by screw mandrel 3.5 to press down, the primary side of busbar formula low-voltage current mutual inductor 4 is crimped together with corresponding copper bar 3.8 by seal face 3.10, now power supply is powered to the primary side of busbar formula low-voltage current mutual inductor 4 by pressure regulator 1 and current lifting device 2, conventional current transformer short time thermal current test can be started.
Do not have this special current transformer short time thermal current test platform in prior art, each test all needs complicated wiring process, and test efficiency is lower.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (4)
1. a current transformer short time thermal current testing table, it is characterized in that: it comprises pressure regulator (1), current lifting device (2) and thread depressing mechanism (3), wherein, described thread depressing mechanism (3) comprises insulated mounting plate (3.1), insulation guide table (3.2), insulate U-shaped compact heap (3.3), insulation orienting lug (3.4), screw mandrel (3.5), two dielectric support block (3.7) and two copper bars (3.8), described insulated mounting plate (3.1) offers two through holes (3.11), described two dielectric support block (3.7) are fixed on the end face of insulated mounting plate (3.1), between two dielectric support block (3.7), there is gap, the bottom surface of insulation guide table (3.2) is fixed on the end face of insulated mounting plate (3.1), the middle part of described insulation guide table (3.2) is provided with vertical slideway (3.9), one end and the vertical slideway (3.9) of described insulation orienting lug (3.4) are slidably connected, the other end of insulation orienting lug (3.4) is fixedly connected with the U-shaped compact heap of insulation (3.3), the bottom of described screw mandrel (3.5) is threaded with the top of the U-shaped compact heap of insulation (3.3), the top of described screw mandrel (3.5) is connected with the screw top of insulation guide table (3.2), two seal faces (3.10) of the U-shaped compact heap of described insulation (3.3) bottom are corresponding with two dielectric support block (3.7), the top of described each copper bar (3.8) is fitted in the end face of corresponding dielectric support block (3.7), the bottom of each copper bar (3.8) passes corresponding through hole (3.11),
The input end of described pressure regulator (1) connects power supply, the output terminal of pressure regulator (1) connects the input end of current lifting device (2), and two output terminals of current lifting device (2) connect the bottom of corresponding copper bar (3.8) respectively.
2. current transformer short time thermal current testing table according to claim 1, is characterized in that: the top of described screw mandrel (3.5) is provided with handwheel (3.6).
3. current transformer short time thermal current testing table according to claim 1, is characterized in that: it also comprises the metal short-circuit board (3.12) that can be communicated with two copper bars (3.8).
4. current transformer short time thermal current testing table according to claim 1, it is characterized in that: the bottom of described each copper bar (3.8) all offers wiring hole (3.13), two output terminals of current lifting device (2) connect the wiring hole (3.13) of corresponding copper bar (3.8) respectively by wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420664695.9U CN204116590U (en) | 2014-11-07 | 2014-11-07 | Current transformer short time thermal current testing table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420664695.9U CN204116590U (en) | 2014-11-07 | 2014-11-07 | Current transformer short time thermal current testing table |
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| Publication Number | Publication Date |
|---|---|
| CN204116590U true CN204116590U (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420664695.9U Active CN204116590U (en) | 2014-11-07 | 2014-11-07 | Current transformer short time thermal current testing table |
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| CN (1) | CN204116590U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405467A (en) * | 2016-05-04 | 2017-02-15 | 中国电力科学研究院 | Low-voltage current transformer short time thermocurrent automation test apparatus and method |
-
2014
- 2014-11-07 CN CN201420664695.9U patent/CN204116590U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106405467A (en) * | 2016-05-04 | 2017-02-15 | 中国电力科学研究院 | Low-voltage current transformer short time thermocurrent automation test apparatus and method |
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| GR01 | Patent grant |