CN212569102U - Zero sequence current transformer functional integrity detection device - Google Patents
Zero sequence current transformer functional integrity detection device Download PDFInfo
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- CN212569102U CN212569102U CN202022635398.XU CN202022635398U CN212569102U CN 212569102 U CN212569102 U CN 212569102U CN 202022635398 U CN202022635398 U CN 202022635398U CN 212569102 U CN212569102 U CN 212569102U
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Abstract
The utility model provides a zero sequence current transformer functional integrity detection device, including rack body, line protector, binding post, alternating current generator, zero sequence current transformer, the inside from the top down of rack body is equipped with line protector, binding post, zero sequence current transformer in proper order to loop through two first wires and connect, alternating current generator is located the outside of rack body, alternating current generator is in be provided with a second wire in the zero sequence current transformer, second wire both ends are connected with alternating current generator. The utility model has the advantages that: the functional integrity of the zero sequence current transformer and the integrity of a current loop of the zero sequence current transformer can be effectively checked in real time, the zero sequence protection failure accident caused by the damage of the zero sequence transformer and the damage of the zero sequence current loop is effectively avoided, the injury of personnel and equipment caused by the protection failure is reduced, and the operation cost of a company is reduced.
Description
Technical Field
The utility model belongs to electric power system control and protection field especially relate to a zero sequence current transformer functional integrity detection device.
Background
The zero sequence current protection generally adopts a special zero sequence current transformer to realize the acquisition of zero sequence current, after the zero sequence current transformer is transmitted, the zero sequence current is transmitted to a protection device through a secondary side cable, the protection device judges whether primary equipment has faults through a logic program, and judges whether a breaker controlled by the protection device needs to be tripped according to the judgment result, when the system normally operates, the primary system does not have fault grounding, so the protection device can not acquire the zero sequence current when the system normally operates, if the zero sequence current transformer has the conditions of internal damage of the transformer, wire breakage of a secondary cable, loosening of a wiring terminal, loosening of a secondary wiring terminal of the zero sequence current transformer, loosening of a connecting piece and the like, the protection device can not identify, when the ground fault occurs, the protection device can generate the refusing, and can not reliably disconnect the, this will cause serious property loss, even personal casualty accident, the zero sequence current transformer is sleeved on the primary high voltage cable, the worker can not maintain it in operation, only when the annual correction period (six years) of the protection equipment is reached, and when the primary equipment is powered off, the equipment can reach the transformer installation site for maintenance, the maintenance is inconvenient, the equipment such as the zero sequence current transformer and the like is directly exposed outdoors, and is exposed to the sun and easily aged for a long time, the equipment (lines) for the transformer used in the transformer substation with zero sequence protection has more intervals, the doors of high-voltage equipment are required to be opened for one-to-one maintenance, and a test for simulating fault current to check whether the transformer is normal is also required to be carried out one-to-one, if the cable penetrating position is sealed by fireproof plugging mud, the through-flow test cannot be carried out, and a primary operator and a secondary maintainer are required to be matched during maintenance, so that a plurality of persons are required.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a zero sequence current transformer functional integrity detection device to solve the weak point of above-mentioned problem.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a zero sequence current transformer functional integrity detection device comprises a cabinet body, a line protector, a wiring terminal, a secondary side wiring terminal, an alternating current generator and a zero sequence current transformer, wherein the inside of the cabinet body is sequentially provided with the line protector, the wiring terminal and the zero sequence current transformer from top to bottom and is connected through two first leads in sequence, the connecting point of the wiring terminal and the zero sequence current transformer is the secondary side wiring terminal, the inside of the cabinet body penetrates through A, B, C first live wires from left to right, D, E, F3 second live wires penetrate through the middle of the zero sequence current transformer, one ends of the 3 second live wires penetrate out of the bottom of the cabinet body, the other ends of the 3 second live wires are respectively connected with A, B, C first live wires in a one-to-one correspondence manner, the alternating current generator is positioned outside the cabinet body, and the alternating current generator is provided with a second, and two ends of the second lead are connected with an alternating current generator.
Furthermore, one or more zero sequence current transformers are arranged on the second lead in a penetrating mode.
Further, every inside routing groove that is equipped with of rack body, every the rack body outside is equipped with outside routing groove, inside routing groove passes a plurality of rack body links together with outside routing groove, two-layer about inside routing groove is equipped with, and the inside routing groove on upper strata is first inside routing groove, and the inside routing groove of lower floor is the inside routing groove of second, outside routing groove is two-layer about being equipped with, and the outside routing groove on upper strata is first outside routing groove, and the outside routing groove of lower floor is the outside routing groove of second.
Further, A, B, C three first live wires pass through a plurality of rack bodies and are placed on first inside trough and first outside trough.
Furthermore, the second wires penetrate through the cabinet bodies and are placed on the second internal wiring groove and the second external wiring groove.
Further, the line protector is provided with an external connection shell, the external connection shell is provided with a plurality of connecting holes, a groove corresponding to the connecting holes is formed in the outer edge, which is in contact with the cabinet door, of the cabinet body, and the connecting holes and the groove are fixed through screws, so that the line protector is fixed inside the cabinet body.
Further, all be equipped with the circular port on first inside trough and the inside trough of second, the diameter in hole is greater than the diameter of D, E, F three second live wires.
Further, the inside locking structure that is equipped with of rack body, the locking structure left end is the first connecting portion of a style of calligraphy, the horizontal fixed mounting of first connecting portion is on the lateral wall of rack body, the vertical second connecting portion of connecting of the first connecting portion other end, second connecting portion bottom fixed connection has the third connecting portion that the level set up, second connecting portion right-hand member mobile connection has the fourth connecting portion, zero sequence current transformer installs between third connecting portion and fourth connecting portion, presss from both sides tight zero sequence current transformer through third connecting portion and fourth connecting portion.
Further, the position department that second connecting portion are located first connecting portion upside is equipped with the recess, second connecting portion are located first connecting portion upside position department and still are equipped with a plurality of vertical distribution's spacing hole, one spacing downthehole the wearing has connect the location slightly, the location is located the upper surface of fourth connecting portion slightly, fixes zero sequence current transformer slightly through the location, fourth connecting portion lower extreme still is equipped with fifth connecting portion for restriction zero sequence current transformer controls.
Compared with the prior art, the utility model discloses following advantage has:
a zero sequence current transformer functional integrity detect, can effectively inspect zero sequence current transformer's functional integrity and current loop's integrality often, effectively avoided because of the zero sequence transformer damages, the zero sequence protection that the zero sequence current loop damage leads to rejects the accident of moving, give alarm signal when taking place the defect, the danger and the loaded down with trivial details degree of transformer substation's zero sequence current transformer maintenance work have been reduced greatly, work efficiency is improved, the manpower of company is reduced, reduce because the protection refuses the injury of the personnel that cause and equipment, reduce the operation cost of company.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:
fig. 1 is a three-dimensional structure diagram of a zero sequence current transformer functional integrity detection apparatus according to the present invention;
fig. 2 is a schematic circuit diagram of a functional integrity detection device for a zero sequence current transformer according to the present invention;
fig. 3 is a three-dimensional structure diagram of the circuit protector of the present invention;
FIG. 4 is a perspective view of the internal wiring duct of the present invention;
fig. 5 is a three-dimensional structure diagram of the locking structure of the present invention;
fig. 6 is a schematic partial view of the zero sequence current transformer functional integrity detection apparatus of the present invention.
Description of reference numerals:
1. a cabinet body; 2. A line protector; 21. a wiring terminal; 22. a secondary side terminal; 3. an alternating current generator; 41. an internal wiring channel; 42. an external cabling channel; 5. a zero sequence current transformer; 6. A locking structure; 61. a first connection portion; 62. a second connecting portion; 63. a third connecting portion; 64. a fourth connecting portion; 65. and a fifth connecting part.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.
As shown in fig. 1 to 6, a zero sequence current transformer functional integrity detection device includes a cabinet body 1, a line protector 2, a wiring terminal 21, a secondary side wiring terminal 22, an ac current generator 3, and a zero sequence current transformer 5, wherein the inside of the cabinet body 1 is sequentially provided with the line protector 2, the wiring terminal 21, and the zero sequence current transformer 5 from top to bottom, and sequentially connected by two first wires, a connection point of the wiring terminal 21 and the zero sequence current transformer 5 is the secondary side wiring terminal 22, the inside of the cabinet body 1 penetrates A, B, C first fire wires from left to right, D, E, F second fire wires penetrate through the middle of the zero sequence current transformer 5, one end of each second fire wire penetrates through the bottom of the cabinet body 1, the other end of each second fire wire is respectively connected with A, B, C first fire wires in a one-to-one correspondence manner, and the ac current generator 3 is located, and a second wire is arranged in the zero sequence current transformer 5 ring, and two ends of the second wire are connected with the alternating current generator 3.
One or more zero sequence current transformers 5 are penetrated on the second lead, and when the second lead penetrates through the plurality of zero sequence current transformers 5, the alternating current generator 3 can simultaneously test the plurality of zero sequence current transformers 5.
In this embodiment, the line protector 2 is an Acrel ALP220, the ac generator 3 is an SDDL-1000mA, and the zero sequence current transformer 5 is an emoson LXK-phi 120.
Every 1 inside wiring groove 41 that is equipped with of rack body, every 1 outside of rack body is equipped with outside wiring groove 42, inside wiring groove 41 passes a plurality of rack bodies 1 with outside wiring groove 42 and links together, two-layer about inside wiring groove 41 is equipped with, and the inside wiring groove 41 on upper strata is first inside wiring groove, and the inside wiring groove 41 on lower floor is the inside wiring groove of second, outside wiring groove 42 is two-layer about being equipped with, and the outside wiring groove 42 on upper strata is first outside wiring groove, and the outside wiring groove 42 on lower floor is the outside wiring groove of second.
A, B, C three first live wires pass through a plurality of cabinet bodies 1 and are placed on a first internal wiring channel and a first external wiring channel.
The second wires penetrate through the cabinet bodies 1 and are placed on the second internal wiring grooves and the second external wiring grooves.
The circuit protector 2 is provided with an external connecting shell, the external connecting shell is provided with a plurality of connecting holes, the outer edge of the cabinet body 1 contacting with the cabinet door is provided with a groove corresponding to the connecting holes, and the connecting holes and the groove are fixed through screws, so that the circuit protector 2 is fixed inside the cabinet body 1.
All be equipped with the circular port on first inside trough and the inside trough of second, the diameter in hole is greater than the diameter of D, E, F three second live wires.
The inside locking structure 6 that is equipped with of rack body 1, the 6 left ends of locking structure are the first connecting portion 61 of a style of calligraphy, the horizontal fixed mounting of first connecting portion 61 is on the lateral wall of rack body 1, the vertical second connecting portion 62 of connecting of the first connecting portion 61 other end, the third connecting portion 63 that the level set up is connected to second connecting portion 62 bottom fixed connection, second connecting portion 62 right-hand member removes and is connected with fourth connecting portion 64, zero sequence current transformer 5 installs between third connecting portion 63 and fourth connecting portion 64, presss from both sides tight zero sequence current transformer 5 through third connecting portion 63 and fourth connecting portion 64, plays limiting displacement.
Second connecting portion 62 is located the position department of first connecting portion 61 upside and is equipped with the recess, second connecting portion 62 is located first connecting portion 61 upside position department and still is equipped with the spacing hole of a plurality of vertical distributions, one spacing downthehole the penetration has been located the location slightly, the location is located the upper surface of fourth connecting portion 64 slightly, accomplishes the back when zero sequence current transformer 5 installs, moves fourth connecting portion 64 down, compresses tightly after zero sequence current transformer 5, passes spacing hole slightly with the location and presses the upside at zero sequence current transformer 5, fixes zero sequence current transformer 5 slightly through the location, restricts reciprocating of zero sequence current transformer 5, fourth connecting portion 64 lower extreme still is equipped with fifth connecting portion 65 for restriction zero sequence current transformer 5 controls and removes.
The working process of the embodiment is as follows:
opening the cabinet body 1, sequentially placing a line protector 2, a wiring terminal 21, a zero sequence current transformer 5 and an alternating current generator 3 from top to bottom, firstly connecting the line protector 2 with the wiring terminal 21 through 2 leads, connecting the wiring terminal 21 with the zero sequence current transformer 5 through 2 leads, wherein the connecting point is a secondary side terminal 22, opening the zero sequence current transformer 5 through a connecting piece, wherein the connecting piece is used for ensuring that the zero sequence current transformer 5 still normally works after being opened or closed, penetrating D, E, F second live wires through the zero sequence current transformer 5, putting a second lead into the zero sequence current transformer 5, connecting two ends of the leads with the alternating current generator 3, opening the alternating current generator 3, and enabling the alternating current generator 3 to always generate a smaller current value, the zero sequence transformer can generate a small current to be input into the protection device, so that the protection device has a small zero sequence current when the system normally operates, the threshold value of the small zero sequence current is added to the zero sequence protection action current at the moment, and when the current loop of the zero sequence transformer is incomplete or the transformer fails, the small zero sequence current disappears, and the protection device gives an alarm to inform a maintainer of processing.
The second wire connected with the same alternating current generator 3 can simultaneously pass through a plurality of zero sequence current transformers 5, so that the safety of the plurality of zero sequence current transformers 5 can be detected simultaneously, the operation cost is further reduced, and the practicability of the device is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.
Claims (9)
1. The utility model provides a zero sequence current transformer functional integrity detection device which characterized in that: the novel cabinet comprises a cabinet body (1), a circuit protector (2), a wiring terminal (21), a secondary side terminal (22), an alternating current generator (3) and a zero sequence current transformer (5), wherein the circuit protector (2), the wiring terminal (21) and the zero sequence current transformer (5) are sequentially arranged in the cabinet body (1) from top to bottom and are connected through two first leads in sequence, a connecting point of the wiring terminal (21) and the zero sequence current transformer (5) is the secondary side terminal (22), A, B, C first live wires penetrate through the cabinet body (1) from left to right, D, E, F second live wires penetrate through the middle of the zero sequence current transformer (5), one ends of the three second live wires penetrate out of the bottom of the cabinet body (1), and the other ends of the three second live wires are respectively connected with the A, B, C first live wires in a one-to-, alternating current generator (3) are located the outside of rack body (1), alternating current generator (3) zero sequence current transformer (5) intra-annular is provided with a second wire, the second wire both ends are connected with alternating current generator (3).
2. The zero sequence current transformer functional integrity detection device of claim 1, characterized in that: one or more zero sequence current transformers (5) are arranged on the second lead in a penetrating mode.
3. The zero sequence current transformer functional integrity detection device of claim 1, characterized in that: every rack body (1) inside is equipped with inside trough (41), every rack body (1) outside is equipped with outside trough (42), inside trough (41) and outside trough (42) pass a plurality of rack bodies (1) and link together, inside trough (41) are two-layer from top to bottom, and the inside trough (41) on upper strata are first inside trough, and inside trough (41) on lower floor are the inside trough of second, two-layer from top to bottom outside trough (42) are equipped with, and the outside trough (42) on upper strata are first outside trough, and outside trough (42) on lower floor are the outside trough of second.
4. The zero sequence current transformer functional integrity detection device of claim 3, characterized in that: a, B, C three first live wires pass through a plurality of cabinet bodies (1) and are placed on a first internal wiring groove and a first external wiring groove.
5. The zero sequence current transformer functional integrity detection device of claim 3, characterized in that: the second wires penetrate through the cabinet bodies (1) and are placed on the second internal wiring grooves and the second external wiring grooves.
6. The zero sequence current transformer functional integrity detection device of claim 1, characterized in that: the circuit protector (2) is provided with an external connecting shell, the external connecting shell is provided with a plurality of connecting holes, a groove corresponding to the connecting holes is formed in the outer edge, which is contacted with the cabinet door, of the cabinet body (1), and the connecting holes and the groove are fixed through screws, so that the circuit protector (2) is fixed inside the cabinet body (1).
7. The zero sequence current transformer functional integrity detection device of claim 3, characterized in that: all be equipped with the circular port on first inside trough and the inside trough of second, the diameter of circular port is greater than the diameter of D, E, F three second live wires.
8. The zero sequence current transformer functional integrity detection device of claim 1, characterized in that: the cabinet is characterized in that a locking structure (6) is arranged inside the cabinet body (1), the left end of the locking structure (6) is a first connecting portion (61) of a straight line shape, the first connecting portion (61) is horizontally and fixedly installed on the side wall of the cabinet body (1), the other end of the first connecting portion (61) is vertically connected with a second connecting portion (62), the bottom end of the second connecting portion (62) is fixedly connected with a third connecting portion (63) of which the level is arranged, the right end of the second connecting portion (62) is movably connected with a fourth connecting portion (64), and the zero sequence current transformer (5) is installed between the third connecting portion (63) and the fourth connecting portion (64).
9. The zero sequence current transformer functional integrity detection device of claim 8, wherein: second connecting portion (62) are located the position department of first connecting portion (61) upside and are equipped with the recess, second connecting portion (62) are located first connecting portion (61) upside position department and still are equipped with the spacing hole of a plurality of vertical distributions, one spacing downthehole the wearing of having connect the location slightly, the location is located the upper surface of fourth connecting portion (64) slightly, through the slightly fixed zero sequence current transformer (5) of location, fourth connecting portion (64) lower extreme still is equipped with fifth connecting portion (65) for the removal about restriction zero sequence current transformer (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022635398.XU CN212569102U (en) | 2020-11-16 | 2020-11-16 | Zero sequence current transformer functional integrity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022635398.XU CN212569102U (en) | 2020-11-16 | 2020-11-16 | Zero sequence current transformer functional integrity detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212569102U true CN212569102U (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022635398.XU Active CN212569102U (en) | 2020-11-16 | 2020-11-16 | Zero sequence current transformer functional integrity detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212569102U (en) |
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- 2020-11-16 CN CN202022635398.XU patent/CN212569102U/en active Active
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