CN219997274U - Hand-held transformer substation CT polarity tester - Google Patents
Hand-held transformer substation CT polarity tester Download PDFInfo
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- CN219997274U CN219997274U CN202321433281.0U CN202321433281U CN219997274U CN 219997274 U CN219997274 U CN 219997274U CN 202321433281 U CN202321433281 U CN 202321433281U CN 219997274 U CN219997274 U CN 219997274U
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- held
- polarity tester
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- 238000001514 detection method Methods 0.000 claims abstract description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses a handheld transformer substation CT polarity tester which comprises a shell and an end cover, wherein the shell and the end cover are detachably connected. A power supply unit is arranged in the shell and used for providing output voltage required by detection; the shell is provided with an arc-shaped bulge, a groove is arranged below the arc-shaped bulge, and the edge of the groove is provided with a chamfer. The casing includes operating portion and gripping portion, and operating portion is provided with terminal and milliamp meter from top to bottom, and the terminal is provided with four, and four terminals set up side by side, are provided with switch and knob on the gripping portion. The utility model is provided with a protection shell, the power supply unit, the acquisition unit and the processing unit are arranged in the shell, and devices in the shell are protected through the shell. The casing includes operating portion and gripping portion, is convenient for receive and store up, carries, and operating personnel just can operate the tester through the gripping portion, convenient to use.
Description
Technical Field
The utility model relates to the technical field of detection devices, in particular to a handheld transformer substation CT polarity tester.
Background
In recent years, with the acceleration of urban process and rapid development of technological productivity in China, the current power grid cannot adapt to the requirements of rapidly developed areas, so that the requirements of China on the number of substations are also increased year by year. The number of newly-built circuit breakers is increased due to the annual rising of the number of newly-built substations, and CT polarity test on the circuit breakers is a precondition for ensuring normal operation of the relay protection device. At present, a dry battery, a pointer multimeter and a test wire are generally utilized for testing the CT polarity of the equipment.
In the field test use process, the device used by the existing transformer substation CT polarity test method is not an integrated test device. The utility model patent with the publication number of CN218003573U discloses a novel synchronous sampling tester of CT's high low pressure, uses through the cooperation of box and radiator unit in prior art 1, can dispel the heat to the detector body, and guarantee detector's operating temperature environment is in a safe within range, fixes the detector body inside the box through fixed subassembly, prevents the in-process of carrying, and the detector body collides with the box inner wall, causes the detector body to appear damaging, influences the life of detector.
The CT polarity monitoring device in the prior art 1 and the market has the defects of large volume, difficult carrying, difficult storage and inconvenient use, and the condition of delaying test work due to insufficient battery power is easy to occur due to the use of a common dry battery. Therefore, it is necessary to manufacture an integrated, portable, easy-to-store and convenient-to-use transformer substation CT polarity tester.
Disclosure of Invention
Therefore, I have designed handheld transformer substation CT polarity tester and are used for solving the difficult problem that carries, uses inconveniently in the prior art.
The technical scheme of the utility model is as follows:
the handheld CT polarity tester for the transformer substation comprises a shell and an end cover, wherein the shell and the end cover are detachably connected.
A power supply unit is arranged in the shell and used for providing output voltage required by detection; the shell is provided with an arc-shaped bulge, a groove is arranged below the arc-shaped bulge, and the edge of the groove is provided with a chamfer.
The casing includes operating portion and gripping portion, and operating portion is provided with terminal and milliamp meter from top to bottom, and the terminal is provided with four, and four terminals set up side by side, are provided with switch and knob on the gripping portion.
In a preferred embodiment, the housing is provided with a chamfer on the rim.
In a preferred technical scheme, a plurality of arc-shaped grooves are arranged on the holding part, and the arc-shaped grooves are uniformly distributed on the holding part.
In a preferred embodiment, the power supply unit is a lithium battery.
In a preferred embodiment, the housing is provided with a clamping device, which is detachably connected to the housing.
In a preferred technical scheme, clamping device includes first splint, torsional spring, pivot and second splint, is provided with the shaft hole on first splint and the second splint, pivot and shaft hole cooperation, and the torsional spring setting is in the pivot, and the one end and the first splint contact of torsional spring, the other end and the second splint contact of torsional spring.
In a preferred technical scheme, be provided with the movable plate on the second splint, set up the spout on the movable plate, be provided with the connecting rod on the second splint, the connecting rod cooperates with the spout.
In a preferred technical scheme, a rubber pad is arranged on the movable plate, and the section of the rubber pad is semicircular.
In a preferred embodiment, the housing and the end cap are made of plastic material.
The beneficial effects of the utility model are as follows:
the utility model is provided with a protection shell, the power supply unit, the acquisition unit and the processing unit are arranged in the shell, and devices in the shell are protected through the shell. The casing includes operating portion and gripping portion, is convenient for receive and store up, carries, and operating personnel just can operate the tester through the gripping portion, convenient to use.
Be provided with the arc arch on the casing, the arc arch can play the guard action to terminal and milliamp meter, prevents to cause the damage to terminal when the detector drops. In addition, be provided with the recess below the arc arch, the terminal sets up in the recess, avoids the foreign object directly to collide with the terminal bottom, has played further guard action to the terminal.
In addition, the utility model is provided with four side-by-side binding posts, and the side-by-side arrangement avoids the problem of complex wiring of the upper and lower staggered binding posts, thereby being beneficial to wiring of operators. The switch and the knob are arranged on the holding part, so that the operation of an operator with one hand is facilitated.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a schematic diagram of one of the structures of the present utility model;
FIG. 3 is a second schematic diagram of the structure of the present utility model;
fig. 4 is a schematic structural view of the clamping device of the present utility model.
In the figure: 100-shell, 110-arc-shaped bulge, 120-groove, 130-binding post, 140-switch, 150-knob, 160-arc-shaped groove, 200-end cover, 300-clamping device, 310-first clamping plate, 320-second clamping plate, 321-movable plate, 322-sliding groove, 323-connecting rod, 324-rubber pad, 330-rotating shaft and 340-shaft hole.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings in the embodiments of the present utility model:
it should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship between the components, the movement condition, etc. in a specific posture, and if the specific posture is changed, the directional indicator is correspondingly changed accordingly.
Furthermore, the descriptions of the "first," "second," and the like in this patent are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including at least one such feature.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
As shown in fig. 1 and 2, the handheld substation CT polarity tester includes a housing 100 and an end cover 200, where the housing 100 and the end cover 200 are detachably connected.
A power supply unit is arranged in the shell 100 and is used for providing output voltage required by detection; the shell 100 is provided with an arc-shaped protrusion 110, a groove 120 is arranged below the arc-shaped protrusion 110, and the edge of the groove 120 is provided with a chamfer.
The housing 100 includes an operation portion provided with binding posts 130 and milliamp meters from top to bottom, the binding posts 130 are provided with four, the four binding posts 130 are arranged side by side, and a grip portion provided with a switch 140 and a knob 150.
The end cap 200 is connected with the housing 100 through screws, so that an operator can conveniently disassemble and assemble the detector when the power supply unit needs to be replaced or the detector needs to be overhauled. The four binding posts 130 are P1, P2, S1, S2, respectively, the switch 140 and the power supply unit (the power supply unit is an adjustable output voltage direct current power supply module, and can provide a direct current voltage of 0-30V) are connected in series between P1 and P2, and the milliamp meter is connected in series between S1 and S2. Different CT loop resistance values are different, under the condition that the measuring ranges of the milliampere meters are the same, the output voltage can be regulated up according to the requirement when the loop resistance value is large, and the output voltage can be regulated down according to the requirement when the loop resistance value is small. The knob 150 is used to adjust the output voltage of the power supply unit.
The top of the arc-shaped protrusion 110 is the highest position of the upper half part of the detector when the detector is horizontally placed, and the purpose of the arc-shaped protrusion 110 is to prevent the binding post 130 and the milliamp meter from directly contacting the ground when the detector falls down from the front, and damage is caused to the binding post 130 and the milliamp meter.
The purpose of arranging the binding posts 130 side by side above the milliamp meter is that when the binding posts 130 are connected by using the test wire, the test wire cannot shield the screen of the milliamp meter to influence the observation of the indicating number of the milliamp meter by an operator, and the situation that the test wire is crossed is avoided when the binding posts 130 are arranged side by side.
The polarity of CT (current transformer) refers to the relation of the current direction between a primary winding and a secondary winding of CT, and the polarity of the current transformer must be measured before and after the connection and overhaul. When the current transformer is connected with the binding post 130 according to the requirement during detection, when the switch 140 is turned on, the pointer of the milliampere meter is forward biased, when the switch 140 is turned off, the pointer of the milliampere meter is reverse biased, then P1 and S1 are the same name ends, the current transformer is polarity-reduced, and if the pointer swings and is opposite to the above, the current transformer is polarity-increased.
The handheld transformer substation CT polarity tester provided by the utility model has the characteristics of small size and good portability, is convenient to use, can be operated by a single person compared with the traditional tester, and improves the efficiency of field operation to a great extent.
Example two
As shown in fig. 2 and 3, in the present embodiment, a chamfer is provided on the edge of the case 100. The chamfering is to smooth the edge of the housing 100 and prevent the operator from being scratched when holding the meter.
The holding part is provided with a plurality of arc grooves 160, and the arc grooves 160 are uniformly distributed on the holding part. The arc-shaped groove 160 is arranged on the back of the holding part, and the arc-shaped groove 160 has the function of enhancing the comfort of an operator when the operator holds the handle, and the finger of the operator is attached to the arc-shaped groove 160, so that the anti-slip function can be achieved.
Example III
In this embodiment, the power supply unit is a lithium battery. The lithium battery has the advantages of high energy density, long service life, quick charge, high safety and the like, and compared with other detectors using dry batteries as power supply devices, the lithium battery can reduce the weight of the detector and prolong the working time of the detector.
Example IV
As shown in fig. 2, in the present embodiment, a clamping device 300 is provided on the housing 100, and the clamping device 300 is detachably connected to the housing 100. The clamping device 300 is coupled to the rear of the housing 100 by screws. The clamping device 300 comprises a first clamping plate 310, a torsion spring, a rotating shaft 330 and a second clamping plate 320, wherein shaft holes 340 are formed in the first clamping plate 310 and the second clamping plate 320, the rotating shaft 330 is matched with the shaft holes 340, the torsion spring is arranged on the rotating shaft 330, one end of the torsion spring is in contact with the first clamping plate 310, and the other end of the torsion spring is in contact with the second clamping plate 320. The operator makes the angle between the first clamping plate 310 and the second clamping plate 320 become large by pressing the second clamping plate 320, and then clamps the detector at the pocket of the clothes or on the edge of the table, enhancing the portability of the detector.
Example five
As shown in fig. 4, in the present embodiment, a moving plate 321 is disposed on the second clamping plate 320, a sliding groove 322 is disposed on the moving plate 321, and a connecting rod 323 is disposed on the second clamping plate 320, where the connecting rod 323 is matched with the sliding groove 322. A clamping groove is provided on the housing 100, and the clamping groove is provided below the first clamping plate 310. The moving plate 321 is pushed down along the length direction of the second clamping plate 320, so that the second clamping plate 320 is separated from the moving plate 321. After the movable plate 321 is pushed to a position capable of rotating around the connecting rod 323, the movable plate 321 is rotated outwards around the connecting rod 323, and then the movable plate 321 is pushed forwards, so that the top end of the movable plate 321 is matched with a clamping groove below the first clamping plate 310, the clamping groove plays a role in limiting and fixing the movable plate 321, the movable plate 321 is used as a bracket, and the detector can be obliquely placed on a table top or a supporting piece.
Example six
As shown in fig. 3, in the present embodiment, a rubber pad 324 is provided on the moving plate 321, and the rubber pad 324 has a semicircular cross section. The rubber pad 324 is pressed by the second clamping plate 320, so that the movable plate 321 is fixed relative to the second clamping plate 320. When the moving plate 321 and the second clamping plate 320 are clamped together and are in a clamping state, the rubber pad 324 contacts the clamped piece, so that the clamping force is dispersed, and the friction force between the clamping device 300 and the clamped piece is increased; when the moving plate 321 is used for supporting the detector, the rubber pad 324 is in contact with the table top or the supporting member, and the rubber pad 324 plays a role of supporting and preventing slipping.
Example seven
In the present embodiment, the case 100 and the end cap 160 are made of a plastic material, such as ABS plastic or PA plastic or PP plastic, which has high strength, impact resistance and chemical resistance. After the shell 100 and the end cover 200 are opened, the shell 100 and the end cover 200 can be manufactured by using an injection molding process, so that mass production of the shell 200 and the end cover 200 can be rapidly realized, and the method has the advantages of high precision and low cost.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, including by way of example only, and not by way of limitation, any modifications, equivalents, or improvements thereto should be construed as falling within the spirit and scope of the present utility model.
Claims (9)
1. Hand-held type transformer substation CT polarity tester, its characterized in that: comprises a shell (100) and an end cover (200), wherein the shell (100) is detachably connected with the end cover (200);
a power supply unit is arranged in the shell (100) and is used for providing output voltage required by detection; an arc-shaped bulge (110) is arranged on the shell (100), a groove (120) is arranged below the arc-shaped bulge (110), and a chamfer is arranged at the edge of the groove (120);
the shell (100) comprises an operation part and a holding part, wherein the operation part is provided with binding posts (130) and milliamp meters from top to bottom, the binding posts (130) are four, the four binding posts (130) are arranged side by side, and the holding part is provided with a switch (140) and a knob (150).
2. The hand-held substation CT polarity tester of claim 1, wherein: the edge of the shell (100) is provided with a chamfer.
3. The hand-held substation CT polarity tester of claim 1, wherein: the holding part is provided with a plurality of arc grooves (160), and the arc grooves (160) are uniformly distributed on the holding part.
4. The hand-held substation CT polarity tester of claim 1, wherein: the power supply unit is a lithium battery.
5. The hand-held substation CT polarity tester of claim 1, wherein: the shell (100) is provided with a clamping device (300), and the clamping device (300) is detachably connected with the shell (100).
6. The hand-held substation CT polarity tester according to claim 5, wherein: clamping device (300) are provided with shaft hole (340) including first splint (310), torsional spring, pivot (330) and second splint (320) on first splint (310) and second splint (320), pivot (330) and shaft hole (340) cooperation, and the torsional spring setting is on pivot (330), and the one end and the contact of first splint (310) of torsional spring, the other end and the contact of second splint (320) of torsional spring.
7. The hand-held substation CT polarity tester of claim 6, wherein: the second clamping plate (320) is provided with a movable plate (321), the movable plate (321) is provided with a sliding groove (322), the second clamping plate (320) is provided with a connecting rod (323), and the connecting rod (323) is matched with the sliding groove (322).
8. The hand-held substation CT polarity tester of claim 7, wherein: a rubber pad (324) is arranged on the moving plate (321), and the section of the rubber pad (324) is semicircular.
9. The hand-held substation CT polarity tester of claim 1, wherein: the housing (100) and the end cap (200) are made of plastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321433281.0U CN219997274U (en) | 2023-06-07 | 2023-06-07 | Hand-held transformer substation CT polarity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321433281.0U CN219997274U (en) | 2023-06-07 | 2023-06-07 | Hand-held transformer substation CT polarity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219997274U true CN219997274U (en) | 2023-11-10 |
Family
ID=88608710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321433281.0U Active CN219997274U (en) | 2023-06-07 | 2023-06-07 | Hand-held transformer substation CT polarity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219997274U (en) |
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2023
- 2023-06-07 CN CN202321433281.0U patent/CN219997274U/en active Active
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