CN112072618B - Main transformer CT secondary current linkage switching terminal with single bus provided with bypass - Google Patents
Main transformer CT secondary current linkage switching terminal with single bus provided with bypass Download PDFInfo
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- CN112072618B CN112072618B CN202010768827.2A CN202010768827A CN112072618B CN 112072618 B CN112072618 B CN 112072618B CN 202010768827 A CN202010768827 A CN 202010768827A CN 112072618 B CN112072618 B CN 112072618B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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Abstract
The invention provides a main transformer CT secondary current linkage switching terminal with a single bus and a bypass, which solves the problems that when the conventional 110kV bus adopts a single bus and bypass operation mode, in the process of mutually switching the normal operation mode and the bypass operation mode, operation steps are multiple, mistakes and leakage are easy to occur, and the secondary circuit of a corresponding current transformer is easy to open, so that the personal safety and the equipment safety are threatened.
Description
Technical Field
The invention relates to the technical field of current bypass switching, in particular to a main transformer CT secondary current linkage switching terminal with a single bus and a bypass.
Background
A wiring diagram of an existing 110kV bus adopting a single bus with bypass operation mode is shown in fig. 1, and referring to fig. 1, in a normal operation mode, a 110kV ii bus is connected with a 10kV i bus sequentially through a first isolating switch 101G, a first circuit breaker 1DL, a main transformer change-up switch current transformer 1LH, a second isolating switch 102G, a main transformer change-up bushing current transformer 5LH (short circuit in a normal operation mode), a main transformer change-up switch current transformer 10LH, and a second circuit breaker 2 DL; when the line is switched from the normal operation mode to the bypass operation mode, the first circuit breaker 1DL is disconnected, the first isolating switch 101G is disconnected, the second isolating switch 102G is disconnected, the main transformer change-up switch current transformer 1LH is disconnected, the 110kV ii bus is disconnected with the main transformer, the third isolating switch 103G is connected, namely the 110kV iii bus is connected as a bypass bus, and the main transformer change-up bushing current transformer 5LH is put into use.
The circuit is by the process of normal operating mode switching to bypass operating mode for live-line operation, and at the switching process, the return circuit under two kinds of operating mode all follows the principle of "short earlier afterwards disconnected", before the switching, the staff need prepare the return circuit under two kinds of operating mode of a plurality of terminal cooperations and realize short circuit output, need break off the terminal of original access respectively after the switching, at this in-process, operating procedure is many, the mistake leaks easily takes place, in case take place misoperation, cause corresponding current transformer secondary circuit to open a way easily, threaten personal safety and equipment safety.
In 15/6/2016, a plug-in type current switching terminal (with the publication number of CN 105680425A) for a relay protection device is disclosed in Chinese patents by national grid company and national grid Heilongjiang province electric power limited company, which solves the problems that when a bypass switch is used for switching over a line switch, the operation steps are complicated, the open circuit of a current transformer is easily caused, and the damage to human bodies and equipment is caused, is flexible to operate, but a plurality of plug-in type scattered current terminals need to be operated, and the technical scheme is suitable for line protection devices of transformer substations of 220kV or more.
Disclosure of Invention
The invention provides a main transformer CT secondary current linkage switching terminal with a single bus and a bypass, which does not need to be matched with a plurality of adjusting terminals, is simple to operate and avoids the possibility that the personal safety is threatened by overvoltage caused by improper manual operation.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
a main transformer CT secondary linkage switching terminal with a single bus and a bypass comprises an adjusting support part, an adjusting plate, a main transformer connecting sheet part, a bypass connecting sheet part, a main shortening connecting sheet part, a bypass short connecting sheet part, a first terminal row for directly accessing main transformer change-up switch current transformer 1LH secondary current, a second terminal row for accessing main transformer change-up switch current transformer 1LH secondary current or accessing main transformer change-up sleeve current transformer 5LH secondary current and a third terminal row for directly accessing main transformer change-up sleeve current transformer 5LH secondary current;
the adjusting and supporting part comprises an adjusting part, an elastic part, a supporting body and a supporting bottom plate, the adjusting part is fixedly connected with the top end of the supporting body, a first through hole, a first supporting rod and a second supporting rod are arranged on the adjusting plate, a second through hole is formed in the supporting bottom plate, the bottom end of the supporting body penetrates through the adjusting plate through the first through hole and penetrates through the supporting bottom plate through the second through hole, the elastic part is sleeved on the outer side surface of the supporting body, the upper end of the elastic part is provided with a lower bottom surface of the adjusting plate, and the lower end of the elastic part is provided with an upper bottom surface of the supporting bottom plate; the adjusting plate is connected with the main transformer connecting piece part through a first supporting rod, the adjusting plate is respectively connected with the bypass connecting piece part and the main short connecting piece part, and the adjusting plate is connected with the bypass short connecting piece part through a second supporting rod;
when the circuit is in a normal operation mode, the elastic piece is compressed, the main transformer connecting piece part is connected with the first terminal row and the second terminal row at the same time, the bypass connecting piece part is disconnected with the second terminal row and the third terminal row at the same time, the main circuit short connecting piece part is disconnected with the first terminal row, the bypass short connecting piece part is connected with the third terminal row, and the second terminal row introduces secondary current of a main transformer variable-height switch current transformer 1LH to an external main transformer protection screen; when the circuit is switched into the bypass operation mode by normal operation mode, the staff twists the regulating part, the elastic component diastole, drive the regulating plate and further drive bypass connection piece part upward movement, the regulating plate drives main change connection piece part upward movement through first bracing piece, main change connection piece part breaks off simultaneously with first terminal row, the connection of second terminal row, bypass connection piece part simultaneously with second terminal row, the third terminal row is connected, main circuit short circuit piece part is connected with first terminal row, bypass short circuit piece part and third terminal row break off, second terminal row introduces main change and becomes the protective screen that becomes high bushing current transformer 5LH secondary current to outside main change.
The elastic piece is clamped between the adjusting plate and the supporting bottom plate, when a circuit is in a normal operation mode, the elastic piece is in a compression state, the main transformer connecting piece part is connected with the first terminal row and the second terminal row at the same time, the bypass connecting piece part is disconnected with the second terminal row and the third terminal row at the same time, the main transformer short circuit piece part is disconnected with the first terminal row, the bypass short circuit piece part is connected with the third terminal row, the second terminal row introduces the secondary current of the main transformer variable-height switch current transformer 1LH to an external main transformer protection screen, and the flow of the secondary current of the main transformer variable-height switch current transformer 1LH in a normal condition corresponds to that of the 110kV bus adopting a single-bus-bar bypass operation mode; when the circuit is switched into the bypass operation mode from the normal state, the staff only need twist the regulating part, thereby adjust the state of elastic component, become relative relaxation state by the compression state, need not adjust a plurality of current terminals, just can realize becoming the linkage switching of main transformer CT secondary current on the circulation, main transformer connection piece part disconnection and first terminal row simultaneously, the connection of second terminal row, bypass connection piece part simultaneously with the second terminal row, the third terminal row is connected, main circuit short circuit piece part is connected with first terminal row, bypass short circuit piece part and third terminal row disconnection, second terminal row introduces main transformer and becomes high bushing current transformer 5LH secondary current to outside main transformer protection screen, 110kV bus adopts the circulation of the main transformer bushing current transformer 5 LH's of bypass operation mode to become so correspondingly.
Preferably, the first terminal row comprises a first a-phase terminal, a first B-phase terminal, a first C-phase terminal and a first N-phase terminal, a first terminal body pressing plate, a second terminal body pressing plate, a third terminal body pressing plate and a fourth terminal body pressing plate, wherein the first a-phase terminal, the first B-phase terminal, the first C-phase terminal and the first N-phase terminal are respectively fixed by the first terminal body pressing plate, the second terminal body pressing plate, the third terminal body pressing plate and the fourth terminal body pressing plate, the first a-phase terminal is connected with a phase a of a secondary current of the main transformer variable height switch current transformer 1LH, the first B-phase terminal is connected with a phase B of a secondary current of the main transformer height variable switch current transformer 1LH, the first C-phase terminal is connected with a phase C of the secondary current of the main transformer height variable switch current transformer 1LH, and the first N-phase terminal is connected with a phase of the secondary current of the main transformer height variable switch current transformer 1 LH;
the second terminal row comprises a second A-phase terminal, a second B-phase terminal, a second C-phase terminal, a second N-phase terminal, a fifth terminal body pressing plate and a sixth terminal body pressing plate, wherein the fifth terminal body pressing plate is used for fixing the second A-phase terminal and the second B-phase terminal, and the sixth terminal body pressing plate is used for fixing the second C-phase terminal and the second N-phase terminal;
the third terminal row comprises a third A-phase terminal, a third B-phase terminal, a third C-phase terminal, a third N-phase terminal, a seventh terminal body pressing plate, an eighth terminal body pressing plate, a ninth terminal body pressing plate and a tenth terminal body pressing plate, and the third A-phase terminal, the third B-phase terminal, the third C-phase terminal and the third N-phase terminal are fixed by the seventh terminal body pressing plate, the eighth terminal body pressing plate, the ninth terminal body pressing plate and the tenth terminal body pressing plate respectively.
Here, the terminal body pressing plate and the terminal post are both conductive.
Preferably, be equipped with the tank circuit that is used for the staff to twist to move adjusting part on the adjusting part, the support body is cylindricly, be equipped with the external screw thread on the lateral surface of support body, be equipped with the first internal thread that matches with the external screw thread on the medial surface of first through-hole, be equipped with the second internal thread that matches with the external screw thread on the medial surface of second through-hole, when the staff twists adjusting part through the tank circuit on the adjusting part, the external screw thread and the first internal thread of support body, second internal thread fit, the support body upwards or moves down, elastic component diastole or shrink, drive regulating plate upwards or move down, the staff only needs to operate an adjusting part, the operating procedure is few, solve the in-process that current 110kV generating line switched each other at normal operating mode and bypass operating mode, the mistake is leaked, and cause the problem that corresponding current transformer secondary circuit opens a way easily.
Preferably, the first through hole is coaxial with the second through hole, so that the support body can vertically penetrate through the adjusting plate and the support base plate, and the support stability of the adjusting and supporting part on the whole switching terminal can be guaranteed.
Preferably, the main transformer connecting piece part comprises a main transformer connecting piece and a first supporting plate, the adjusting plate is connected with the first supporting plate through a first supporting rod, the upper bottom surface of the main transformer connecting piece is fixedly connected with the lower bottom surface of the first supporting plate, one side of any one of the first terminal body pressing plate, the second terminal body pressing plate, the third terminal body pressing plate and the fourth terminal body pressing plate is provided with a first contact piece, one side of any one of the fifth terminal body pressing plate and the sixth terminal body pressing plate, which is opposite to the side where the first contact piece is located, is provided with a second contact piece, and when the circuit is in a normal operation mode, the lower bottom surface of the main transformer connecting piece is simultaneously connected with the upper bottom surface of the first contact piece and the upper bottom surface of the second contact piece; when the circuit is converted from the normal operation mode to the bypass operation mode, the lower bottom surface of the main transformer connecting sheet is simultaneously disconnected with the upper bottom surface of the first contact sheet and the upper bottom surface of the second contact sheet.
Preferably, the bypass connecting piece part comprises a second supporting plate and a bypass connecting piece, the second supporting plate is perpendicular to the side face of the adjusting plate and vertically penetrates through the adjusting plate from the side face of the adjusting plate, the upper bottom face of the second supporting plate (51) is fixedly connected with the lower bottom face of the bypass connecting piece, a third contact piece is further arranged on the other side of any one of the fifth terminal body pressing plate and the sixth terminal body pressing plate, a fourth contact piece is arranged on one side, opposite to the side where the third contact piece is located, of any one of the seventh terminal body pressing plate, the eighth terminal body pressing plate, the ninth terminal body pressing plate and the tenth terminal body pressing plate, when the circuit is converted from a normal operation mode to a bypass operation mode, a worker twists the adjusting part, the elastic piece expands to drive the adjusting plate to move upwards, the second supporting plate is further driven to move upwards, and the bypass is simultaneously connected with the third contact piece and the fourth contact piece; when the circuit was changed into normal operating mode by the bypass operating mode, the staff twisted adjusting part, and the elastic component shrink drives the regulating plate downstream, further drives the second backup pad downstream, and the bypass connection piece disconnection is connected with third contact piece, fourth contact piece.
The second support plate vertically passes through the adjusting plate and is tightly attached to the adjusting plate.
Preferably, the main shortening splicing part comprises a third supporting plate and a main shortening splicing piece, the third supporting plate is perpendicular to the adjusting plate, one end of the adjusting plate is fixedly connected with the side face of the third supporting plate, the upper bottom face of the third supporting plate is connected with the lower bottom face of the main shortening splicing piece, a fifth splicing piece is further arranged on any one of the first terminal body pressing plate, the second terminal body pressing plate, the third terminal body pressing plate and the fourth terminal body pressing plate, when the circuit is converted from a normal operation mode to a bypass operation mode, a worker twists the adjusting part, the elastic piece expands to drive the adjusting plate to move upwards, the third supporting plate is further driven to move upwards, and the main shortening splicing piece is connected with the fifth splicing piece; when the circuit is converted into the normal operation mode from the bypass operation mode, the staff twists the adjusting part, the elastic part contracts, the adjusting plate is driven to move downwards, the third supporting plate is further driven to move downwards, and the main transformer short-circuit piece is disconnected with the fifth contact piece.
Preferably, the bypass short connecting piece part comprises a fourth supporting plate and a bypass short connecting piece, the adjusting plate is fixedly connected with the fourth supporting plate through a second supporting rod, the fourth supporting plate is perpendicular to the adjusting plate, the lower bottom surface of the fourth supporting plate is connected with the upper bottom surface of the bypass short connecting piece, any one of the seventh terminal body pressing plate, the eighth terminal body pressing plate, the ninth terminal body pressing plate and the tenth terminal body pressing plate is provided with a sixth connecting piece, when the circuit is switched from the normal operation mode to the bypass operation mode, a worker twists the adjusting part, the elastic piece relaxes to drive the adjusting plate to move upwards, the fourth supporting plate is further driven to move upwards through the second supporting rod, and the bypass short connecting piece is disconnected with the sixth connecting piece; when the circuit is converted into normal operating mode by the bypass operating mode, the staff twists the adjusting part, and the elastic component contracts, drives the adjusting plate and moves down, further drives fourth backup pad and moves down through the second bracing piece, and the bypass short connector piece is connected with the sixth contact piece.
The first contact piece, the second contact piece, the third contact piece, the fourth contact piece, the fifth contact piece and the sixth contact piece are all conductive, and secondary current flows in different connection pieces when different operation modes are switched.
Preferably, the first terminal body pressing plate, the second terminal body pressing plate, the third terminal body pressing plate, the fourth terminal body pressing plate, the fifth terminal body pressing plate, the sixth terminal body pressing plate, the seventh terminal body pressing plate, the eighth terminal body pressing plate, the ninth terminal body pressing plate and the tenth terminal body pressing plate are all D1 in thickness, the main transformer connecting sheet, the bypass connecting sheet, the main shortened connecting sheet and the bypass short connecting sheet are all 2D1/3 in thickness, and the first contact sheet, the second contact sheet, the third contact sheet, the fourth contact sheet, the fifth contact sheet and the sixth contact sheet are all D1/3 in thickness; when the line is in a normal operation mode, the lower bottom surface of any one of the first contact piece, the second contact piece, the third contact piece, the fourth contact piece, the fifth contact piece and the sixth contact piece is on the same plane as the lower bottom surface of any one of the second terminal body pressing plate, the third terminal body pressing plate, the fourth terminal body pressing plate, the fifth terminal body pressing plate, the sixth terminal body pressing plate, the seventh terminal body pressing plate, the eighth terminal body pressing plate, the ninth terminal body pressing plate and the tenth terminal body pressing plate, when the line is converted from the normal operation mode to a bypass operation mode, the bypass connection piece moves upwards by a distance of D1, the third contact piece and the fourth contact piece both receive the pressure of the upward movement of the bypass connection piece and move upwards by a distance of 2D1/3, the main transformer short-circuit piece moves upwards by a distance of D1, the fifth contact piece receives the pressure of the upward movement of the main transformer and moves upwards by a distance of 2D1/3, and the second A-phase terminal of the second terminal row, the second B-phase terminal, the second C-phase terminal and the second N-phase terminal are respectively introduced into a secondary current transformer LH 5 of the main transformer wiring terminal;
when the circuit is in a bypass operation mode, the upper bottom surface of any one of the first contact piece, the second contact piece, the third contact piece, the fourth contact piece, the fifth contact piece and the sixth contact piece is on the same plane as the upper bottom surface of any one of the second terminal body pressing plate, the third terminal body pressing plate, the fourth terminal body pressing plate, the fifth terminal body pressing plate, the sixth terminal body pressing plate, the seventh terminal body pressing plate, the eighth terminal body pressing plate, the ninth terminal body pressing plate and the tenth terminal body pressing plate, when the circuit is converted from the bypass operation mode to a normal operation mode, the main transformer connecting sheet moves downwards by a distance of D1, and the first contact piece and the second contact piece are pressed by the main transformer connecting sheet to move downwards by a distance of 2D 1/3; the distance of D1 is moved downwards by the bypass short connection piece, the distance of 2D1/3 is moved upwards by the sixth contact piece under the pressure of downward movement of the bypass short connection piece, and the secondary current of the main transformer variable-height switch current transformer 1LH is introduced into the second A-phase wiring column, the second B-phase wiring column, the second C-phase wiring column and the second N-phase wiring column of the second wiring column row.
Preferably, in the transition process of converting the normal operation mode into the bypass operation mode or converting the bypass operation mode into the normal operation mode, any one of a main transformer connecting sheet, a bypass connecting sheet, a main shortened connecting sheet and a bypass short connecting sheet of the main transformer CT secondary linkage switching terminal with the bypass of the single terminal bus is in a connection state with the circuit.
In the normal operation mode, under the pressure of the spring in the terminal body pressing plate, the lower bottom surfaces of all the contact pieces are on the same horizontal plane with the lower bottom surface of the corresponding terminal body pressing plate, if the corresponding connecting piece moves upwards, the contact piece moves upwards to correspondingly compress the spring in the terminal body pressing plate, and when the upper bottom surface of any one of the first contact piece, the second contact piece, the third contact piece, the fourth contact piece, the fifth contact piece and the sixth contact piece is on the same horizontal plane with the upper bottom surface of the corresponding terminal body pressing plate, the spring in the terminal body pressing plate is in the maximum compression state.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides a main transformer CT secondary current linkage switching terminal with a single bus and a bypass, which is characterized in that only one adjusting support part is used for driving an adjusting plate to adjust the connection and disconnection among a main transformer connecting sheet part, a bypass connecting sheet part, a main shortened connecting sheet part and a bypass short connecting sheet part with a wiring terminal row, so that the switching of a circuit between a normal operation mode and a bypass operation mode is completed, a plurality of adjusting terminals are not required to be matched, the operation is simple, and the possibility that the personal safety is threatened by overvoltage caused by improper manual operation is avoided.
Drawings
Fig. 1 is a wiring diagram of a conventional 110kV bus in a single bus-to-bypass operation mode proposed in the background art of the present invention;
fig. 2 is a schematic overall structure diagram of a single-bus main transformer CT secondary current linkage switching terminal with a bypass in the embodiment of the present invention;
fig. 3 is a circuit connection diagram of secondary current flowing through the main transformer CT in a normal operation mode corresponding to the schematic overall structure of the main transformer CT secondary current linkage switching terminal with a bypass of the single bus of fig. 2 according to an embodiment of the present invention;
fig. 4 is a circuit connection diagram illustrating a secondary current flowing through the main transformer CT in an overall structural schematic diagram of the main transformer CT secondary current linkage switching terminal with a bypass of the single bus of fig. 2 according to an embodiment of the present invention in a bypass operation mode;
fig. 5 is a schematic structural diagram of inner side surfaces of a first through hole and a second through hole provided in the embodiment of the present invention;
fig. 6 is a state diagram of the current switching terminal of the circuit in the normal operation mode according to the embodiment of the present invention;
fig. 7 is a state diagram of the current switching terminal of the circuit in the bypass operation mode according to the embodiment of the present invention;
FIG. 8 is a view showing a positional relationship between a second supporting plate and a connecting portion of an adjusting plate according to an embodiment of the present invention;
fig. 9 is a state diagram of the current switching terminal of the circuit during the transition between the bypass operation mode and the normal operation mode according to the embodiment of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for better illustration of the present embodiment, certain parts of the drawings may be omitted, enlarged or reduced, and do not represent actual dimensions;
it will be understood by those skilled in the art that certain well-known illustrations in the drawings may be omitted.
The technical solution of the present invention is further described with reference to the drawings and the embodiments.
Example 1
The integral structure diagram of a single-bus main transformer CT secondary current linkage switching terminal with a bypass is shown in figure 2, and is shown in figures 1 to 7, and the switching terminal comprises an adjusting support part 1, an adjusting plate 2, a main transformer connecting sheet part, a bypass connecting sheet part, a main shortening connecting sheet part, a bypass short connecting sheet part, a first terminal row 8 for directly accessing the main transformer variable height switch current transformer 1LH secondary current, a second terminal row 9 for accessing the main transformer variable height switch current transformer 1LH secondary current or accessing the main transformer variable height sleeve current transformer 5LH secondary current, and a third terminal row 10 for directly accessing the main transformer variable height sleeve current transformer 5LH secondary current;
in specific implementation, with reference to fig. 1, in a normal operation mode, a 110kV ii bus is sequentially connected to a 10kV i bus through a main transformer variable-height switching current transformer 1LH and a main transformer (other switches are omitted in the description herein) and a secondary current of the main transformer variable-height switching current transformer 1LH is a current that is connected to an external main transformer protection screen in a normal operation mode, referring to fig. 3, in the normal operation mode, a first terminal row 8 is used as a direct access row of a secondary current of the main transformer variable-height switching current transformer 1LH, and a third terminal row 10 that is directly connected to a secondary current of a main transformer variable-height bushing current transformer 5LH is short-circuited, a thick vertical line in fig. 3 represents a short circuit, and a second terminal row 9 is used as a drainage row to introduce the secondary current of the main transformer variable-height switching current transformer 1LH that flows from the first terminal row 8 into the external main transformer protection screen, thereby completing the access of the secondary current of the main transformer variable-height switching current transformer 1LH in the normal operation mode; in the bypass operation mode, the 110k III bus is sequentially connected with the 10kV I bus through a main transformer transformation bushing current transformer 5LH and a main transformer (other switches are omitted in the description here), the secondary current of the main transformer transformation bushing current transformer 5LH is the current which is connected into an external main transformer protection screen in the bypass operation mode, in combination with fig. 4, in the bypass operation mode, the third terminal row 10 is used as a direct access row of the secondary current of the main transformer transformation bushing current transformer 5LH, the first terminal row 8 which is directly connected into the main transformer transformation bushing current transformer 1LH secondary current at the moment is short-circuited, the thickened vertical line in fig. 4 shows short-circuit, the second terminal row 9 is used as a drainage row to introduce the secondary current of the main transformer bushing current transformer 5LH flowing from the third terminal row 10 into the external main transformer protection screen, and the access of the secondary current of the main transformer bushing current transformer 5LH in the bypass operation mode is completed.
Referring to fig. 2, 5, 6 and 7, the adjusting and supporting portion 1 includes an adjusting member 11, an elastic member 12, a supporting body 13 and a supporting bottom plate 14, the adjusting member 11 is fixedly connected to the top end of the supporting body 13, the adjusting plate 2 is provided with a first through hole 21, a first supporting rod 22 and a second supporting rod 23, as shown in fig. 5, the supporting bottom plate 14 is provided with a second through hole 141, the bottom end of the supporting body 13 passes through the adjusting plate 2 via the first through hole 21, and passes through the supporting bottom plate 14 via the second through hole 141, referring to fig. 2 and 5, the elastic member 12 is sleeved on the outer side surface of the supporting body 13, the upper end of the elastic member 12 is provided with the lower bottom surface of the adjusting plate 2, and the lower end of the elastic member 12 is provided with the upper bottom surface of the supporting bottom plate 14; the adjusting plate 2 is connected with a main transformer connecting sheet part through a first supporting rod 22, the adjusting plate 2 is also respectively connected with a bypass connecting sheet part and a main short connecting sheet part, and the adjusting plate 2 is connected with the bypass short connecting sheet part through a second supporting rod 23; in this embodiment, the elastic member 12 is a spring.
When the circuit is in a normal operation mode, the elastic piece 12 is compressed, the main transformer connecting piece part is connected with the first terminal row 8 and the second terminal row 9 at the same time, the bypass connecting piece part is disconnected with the second terminal row 9 and the third terminal row 10 at the same time, the main circuit short-circuit piece part is disconnected with the first terminal row 8, the bypass short-circuit piece part is connected with the third terminal row 10, and the second terminal row 9 introduces secondary current of a main transformer variable-height switch current transformer 1LH to an external main transformer protection screen; when the circuit is switched from the normal operation mode to the bypass operation mode, a worker twists the adjusting part 11, the elastic part 12 relaxes to drive the adjusting plate 2 and further drive the bypass connecting sheet part to move upwards, the adjusting plate 2 drives the main transformer connecting sheet part 4 to move upwards through the first support rod 22, the main transformer connecting sheet part is simultaneously disconnected from the first terminal row 8 and the second terminal row 9, the bypass connecting sheet part is simultaneously connected with the second terminal row 9 and the third terminal row 10, the main circuit short connecting sheet part is connected with the first terminal row 8, the bypass short connecting sheet is disconnected with the third terminal row 10, and the second terminal row 9 introduces main transformer transformation height-changing sleeve current transformer 5LH secondary current to an external main transformer protection screen.
As shown in fig. 2 and 3, the first terminal row 8 includes a first a-phase terminal 81, a first B-phase terminal 82, a first C-phase terminal 83, a first N-phase terminal 84, a first terminal body pressing plate 15, a second terminal body pressing plate 16, a third terminal body pressing plate 17, and a fourth terminal body pressing plate 18, the first a-phase terminal 81, the first B-phase terminal 82, the first C-phase terminal 83, and the first N-phase terminal 84 are fixed by the first terminal body pressing plate 15, the second terminal body pressing plate 16, the third terminal body pressing plate 17, and the fourth terminal body pressing plate 18, respectively, as shown in fig. 3, the mechanical structure of the switching terminal is combined with the circuit connection scenario, the first a-phase terminal 81 is connected to the a-phase of the main transformer 1LH secondary current, the first B-phase terminal 82 is connected to the B-phase of the main transformer 1LH secondary current, the first C-phase terminal 83 is connected to the C-phase of the main transformer 1LH secondary current, and the first N-phase terminal 84 is connected to the main transformer 1LH secondary current;
the second terminal row 9 includes a second a-phase terminal 91, a second B-phase terminal 92, a second C-phase terminal 93, a second N-phase terminal 94, a fifth terminal body pressing plate 31, and a sixth terminal body pressing plate 32, where the fifth terminal body pressing plate 31 is used to fix the second a-phase terminal 91 and the second B-phase terminal 92, and the sixth terminal body pressing plate 32 is used to fix the second C-phase terminal 93 and the second N-phase terminal 94;
referring to fig. 2 and 3, the third terminal row 10 includes a third a-phase terminal 101, a third B-phase terminal 102, a third C-phase terminal 103, a third N-phase terminal 104, a seventh terminal body pressing plate 20, an eighth terminal body pressing plate 210, a ninth terminal body pressing plate 221, and a tenth terminal body pressing plate 231, the third a-phase terminal 101, the third B-phase terminal 102, the third C-phase terminal 103, and the third N-phase terminal 104 are respectively fixed by the seventh terminal body pressing plate 20, the eighth terminal body pressing plate 220, the ninth terminal body pressing plate 221, and the tenth terminal body pressing plate 231, where all the terminal body pressing plates and terminals are electrically conductive, the third a-phase terminal 101 is connected to an a-phase of a secondary current of the main transformer 5LH, the third B-phase terminal 102 is connected to a B-phase of a secondary current of the main transformer 5LH, the third C-phase terminal 103 is connected to a C-phase of the secondary current of the LH transformer, and the third N-phase terminal 104 is connected to a secondary current of the LH transformer 5;
referring to fig. 2 and 5, a groove 111 for a worker to screw the adjusting member 11 is provided on the adjusting member 11, the supporting body 13 is cylindrical, and an external thread 131 is provided on an outer side surface of the supporting body 13, as shown in fig. 5 and 6, a first internal thread 211 matching the external thread 131 is provided on an inner side surface of the first through hole 21, and a second internal thread 212 matching the external thread 131 is provided on an inner side surface of the second through hole 141, when the worker screws the adjusting member 11 through the groove 111 on the adjusting member 11 (according to a thread matching situation adopted, the worker may screw clockwise or may screw counterclockwise), the external thread 131 of the supporting body 13 is matched with the first internal thread 211 and the second internal thread 212, the supporting body 13 moves up or down, the elastic member 12 expands or contracts, and drives the adjusting plate 2 to move up or down, the worker only needs to operate one adjusting member 11, and the operation steps are few, thereby solving the problems that a leakage occurs and an open circuit of a corresponding secondary current transformer is easily caused when the existing 110kV bus is switched between a normal operation mode and a bypass operation mode.
As shown in fig. 5, the first through hole 21 is coaxial with the second through hole 141, which ensures that the support body 13 vertically penetrates the adjustment plate 2 and the support base plate 14, thereby ensuring the support stability of the adjustment support part 1 for the entire switching terminal.
As shown in fig. 2, the main transformer connecting piece portion includes a main transformer connecting piece 41 and a first supporting plate 42, the adjusting plate 2 is connected to the first supporting plate 42 through a first supporting rod 22, the upper bottom surface of the main transformer connecting piece 41 is fixedly connected to the lower bottom surface of the first supporting plate 42, one side of any one of the first terminal body pressing plate 15, the second terminal body pressing plate 16, the third terminal body pressing plate 17 and the fourth terminal body pressing plate 18 is provided with a first contact piece 19, and the side of any one of the fifth terminal body pressing plate 31 and the sixth terminal body pressing plate 32 opposite to the side of the first contact piece 19 is provided with a second contact piece 311, with reference to fig. 6, when the circuit is in the normal operation mode, the lower bottom surface of the main transformer connecting piece 41 is simultaneously connected to the upper bottom surfaces of the first contact piece 19 and the second contact piece 311; as shown in fig. 7, when the line is switched from the normal operation mode to the bypass operation mode, the lower bottom surface of the main-transformer connecting piece 41 is disconnected from the upper bottom surface of the first contact piece 19 and the upper bottom surface of the second contact piece 311 at the same time.
As shown in fig. 2 and 8, the bypass connecting piece portion includes a second supporting plate 51 and a bypass connecting piece 52, referring to fig. 8, the second supporting plate 51 is perpendicular to the side surface of the adjusting plate 2 and vertically penetrates through the adjusting plate 2 from the side surface of the adjusting plate 2, referring to fig. 2, the upper bottom surface of the second supporting plate 51 is fixedly connected with the lower bottom surface of the bypass connecting piece 52, the other side of any one of the fifth terminal body pressing plate 31 and the sixth terminal body pressing plate 32 is further provided with a third contact piece 312, the other side of any one of the seventh terminal body pressing plate 20, the eighth terminal body pressing plate 210, the ninth terminal body pressing plate 221 and the tenth terminal body pressing plate 231 opposite to the side of the third contact piece 312 is provided with a fourth contact piece 24, referring to fig. 7, when the circuit is switched from the normal operation mode to the bypass operation mode, the worker twists the adjusting member 11, the elastic member 12 is relaxed to drive the adjusting plate 2 to move upwards and further drive the second supporting plate 51 to move upwards, and the bypass connecting piece 52 is simultaneously connected with the third contact piece 312 and the fourth contact piece 24; referring to fig. 6, when the line is switched from the bypass operation mode to the normal operation mode, the operator twists the adjusting part 11, the elastic part 12 contracts, the adjusting plate 2 is driven to move downward, the second supporting plate 51 is further driven to move downward, and the bypass connecting piece 52 is disconnected from the third contact piece 312 and the fourth contact piece 24. In another embodiment, the second supporting plate 51 vertically passes through the adjusting plate 2 and is closely attached to the adjusting plate 2.
As shown in fig. 1 and 6, the main shortened contact piece portion 6 includes a third support plate 61 and a main shortened contact piece 62, the third support plate 61 is perpendicular to the adjusting plate 2, one end of the adjusting plate 2 is fixedly connected to a side surface of the third support plate 61, an upper bottom surface of the third support plate 61 is connected to a lower bottom surface of the main shortened contact piece 62, and a fifth contact piece 25 is further disposed on any one of the first terminal body pressing plate 15, the second terminal body pressing plate 16, the third terminal body pressing plate 17 and the fourth terminal body pressing plate 18, referring to fig. 7, when the line is switched from the normal operation mode to the bypass operation mode, a worker twists and moves the adjusting member 11, the elastic piece 12 is relaxed, the adjusting plate 2 is driven to move upwards, the third support plate 61 is further driven to move upwards, and the main shortened contact piece 62 is connected to the fifth contact piece 25; referring to fig. 6, when the line is switched from the bypass operation mode to the normal operation mode, the operator twists the adjusting part 11, the elastic part 12 contracts, the adjusting plate 2 is driven to move downwards, the third supporting plate 61 is further driven to move downwards, and the main short contact piece 62 is disconnected from the fifth contact piece 25.
Referring to fig. 1, the bypass short connecting piece portion 7 includes a fourth supporting plate 71 and a bypass short connecting piece 72, the adjusting plate 2 is fixedly connected to the fourth supporting plate 71 through a second supporting rod 23, the fourth supporting plate 71 is perpendicular to the adjusting plate 2, a lower bottom surface of the fourth supporting plate 71 is connected to an upper bottom surface of the bypass short connecting piece 72, any one of the seventh terminal body pressing plate 20, the eighth terminal body pressing plate 210, the ninth terminal body pressing plate 221 and the tenth terminal body pressing plate 231 is provided with a sixth contact piece 26, with reference to fig. 7, when the line is switched from the normal operation mode to the bypass operation mode, a worker twists the adjusting part 11, the elastic piece 12 relaxes to drive the adjusting plate 2 to move upward, the fourth supporting plate 71 is further driven to move upward through the second supporting rod 23, and the bypass short connecting piece 72 is disconnected from the sixth contact piece 26; combine fig. 6, when the circuit is converted into normal operating mode by the bypass operating mode, the staff twists adjusting part 11, elastic component 12 contracts, drive regulating plate 2 and move down, further drive fourth backup pad 71 through second bracing piece 23 and move down, bypass short circuit piece 72 is connected with sixth contact piece 26, during concrete implementation, be equipped with the through-hole in fourth backup pad 71, when making things convenient for fourth backup pad 71 to reciprocate, third B looks terminal 102, third C looks terminal 103 wear out at penetrating of through-hole.
The thicknesses of the first terminal body pressing plate 15, the second terminal body pressing plate 16, the third terminal body pressing plate 17, the fourth terminal body pressing plate 18, the fifth terminal body pressing plate 31, the sixth terminal body pressing plate 32, the seventh terminal body pressing plate 20, the eighth terminal body pressing plate 210, the ninth terminal body pressing plate 221 and the tenth terminal body pressing plate 231 are all D1, the thicknesses of the main transformer connecting plate 41, the bypass connecting plate 52, the main transformer shorting plate 62 and the bypass shorting plate 72 are all 2D1/3, the thicknesses of the first contact plate 19, the second contact plate 311, the third contact plate 312, the fourth contact plate 24, the fifth contact plate 25 and the sixth contact plate 26 are all D1/3, the first contact plate 19, the second contact plate 311, the third contact plate 312, the fourth contact plate 24, the fifth contact plate 25 and the sixth contact plate 26 are all conductive, and secondary current flows in different connecting plates when different operation modes are switched; when the circuit is in the normal operation mode, the lower bottom surface of any one of the first contact piece 19, the second contact piece 311, the third contact piece 312, the fourth contact piece 24, the fifth contact piece 25 and the sixth contact piece 26 is on the same plane with the lower bottom surface of any one of the second terminal body pressing plate 16, the third terminal body pressing plate 17, the fourth terminal body pressing plate 18, the fifth terminal body pressing plate 31, the sixth terminal body pressing plate 32, the seventh terminal body pressing plate 20, the eighth terminal body pressing plate 210, the ninth terminal body pressing plate 221 and the tenth terminal body pressing plate 231, when the line is converted from the normal operation mode to the bypass operation mode, the bypass connecting sheet 52 moves upwards by a distance of D1, the third contact sheet 312 and the fourth contact sheet 24 are pressed by the bypass connecting sheet 52 to move upwards by a distance of 2D1/3, the main transformer short-circuit sheet 62 moves upwards by a distance of D1, the fifth contact sheet 25 is pressed by the main transformer short-circuit sheet 62 to move upwards by a distance of 2D1/3, and the second A-phase wiring column, the second B-phase wiring column, the second C-phase wiring column and the second N-phase wiring column of the second wiring column bank 9 are respectively introduced into the secondary current of the main transformer high-bushing current transformer 5 LH;
when the line is in the bypass operation mode, the upper bottom surface of any one of the first contact piece 19, the second contact piece 311, the third contact piece 312, the fourth contact piece 24, the fifth contact piece 25 and the sixth contact piece 26 and the upper bottom surface of any one of the second terminal body pressing plate 16, the third terminal body pressing plate 17, the fourth terminal body pressing plate 18, the fifth terminal body pressing plate 31, the sixth terminal body pressing plate 32, the seventh terminal body pressing plate 20, the eighth terminal body pressing plate 210, the ninth terminal body pressing plate 221 and the tenth terminal body pressing plate 231 are all on the same plane, when the line is converted from the bypass operation mode to the normal operation mode, the main connecting piece 41 moves downward by a distance of D1, and the first contact piece 19 and the second contact piece 311 are pressed by the main connecting piece 41 to move downward by a distance of 2D 1/3; the bypass shorting bar 72 moves downward by a distance of D1, the sixth contact bar 26 is pressed by the bypass shorting bar 72 moving downward and moves upward by a distance of 2D1/3, and the second a-phase terminal, the second B-phase terminal, the second C-phase terminal and the second N-phase terminal of the second terminal row 9 introduce the secondary current of the main transformer high-switching current transformer 1 LH.
As shown in fig. 9, in the transition process of the line being converted from the normal operation mode to the bypass operation mode or from the bypass operation mode to the normal operation mode, any one of the main transformer connecting sheet 41, the bypass connecting sheet 52, the main transformer short-circuit sheet 62 and the bypass short-circuit sheet 72 of the main transformer CT secondary linkage switching terminal with the bypass of the single terminal bus is in a connected state with the line. The relative position between any one of the first contact piece 19, the second contact piece 311, the third contact piece 312, the fourth contact piece 24, the fifth contact piece 25 and the sixth contact piece 26 and the corresponding terminal body pressing plate is actually controlled by a spring inside the terminal body pressing plate, in a normal operation mode, under the pressure of the spring inside the terminal body pressing plate, the lower bottom surfaces of all the contact pieces and the lower bottom surface of the corresponding terminal body pressing plate are on the same horizontal plane, if the corresponding connection piece moves upwards, the contact piece itself also moves upwards and correspondingly compresses the spring inside the terminal body pressing plate, and when the upper bottom surface of any one of the first contact piece 19, the second contact piece 311, the third contact piece 312, the fourth contact piece 24, the fifth contact piece 25 and the sixth contact piece 26 and the upper bottom surface of the corresponding terminal body pressing plate are on the same horizontal plane, the spring inside the terminal body pressing plate is in a maximum compression state.
The positional relationships depicted in the drawings, such as "upper", "lower", "left", "right", are for illustrative purposes only and are not to be construed as limiting the present patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A main transformer CT secondary linkage switching terminal with a bypass on a single bus is characterized by comprising an adjusting support part (1), an adjusting plate (2), a main transformer connecting sheet part, a bypass connecting sheet part, a main shortening connecting sheet part, a bypass short connecting sheet part, a first terminal row (8) for directly accessing a main transformer variable-height switch current transformer 1LH secondary current, a second terminal row (9) for accessing the main transformer variable-height switch current transformer 1LH secondary current or accessing a main transformer variable-height sleeve current transformer 5LH secondary current and a third terminal row (10) for directly accessing the main transformer variable-height sleeve current transformer 5LH secondary current;
the adjusting and supporting part (1) comprises an adjusting part (11), an elastic part (12), a supporting body (13) and a supporting bottom plate (14), the adjusting part (11) is fixedly connected with the top end of the supporting body (13), a first through hole (21), a first supporting rod (22) and a second supporting rod (23) are arranged on the adjusting plate (2), a second through hole (141) is arranged on the supporting bottom plate (14), the bottom end of the supporting body (13) penetrates through the adjusting plate (2) through the first through hole (21), the supporting bottom plate (14) through the second through hole (141), the elastic part (12) is sleeved on the outer side surface of the supporting body (13), the upper end of the elastic part (12) is provided with the lower bottom surface of the adjusting plate (2), and the lower end of the elastic part (12) is provided with the upper bottom surface of the supporting bottom plate (14); the adjusting plate (2) is connected with a main transformer connecting piece part through a first supporting rod (22), the adjusting plate (2) is respectively connected with a bypass connecting piece part and a main short connecting piece part, and the adjusting plate (2) is connected with the bypass short connecting piece part through a second supporting rod (23);
when the circuit is in a normal operation mode, the elastic piece (12) is compressed, the main transformer connecting sheet part (4) is simultaneously connected with the first terminal row (8) and the second terminal row (9), the bypass connecting sheet part is simultaneously disconnected with the second terminal row (9) and the third terminal row (10), the main circuit short connecting sheet part is disconnected with the first terminal row (8), the bypass short connecting sheet part is connected with the third terminal row (10), and the second terminal row (9) introduces the secondary current of the main transformer variable height switch current transformer 1LH to an external main transformer protection screen; when the circuit is switched into bypass operation mode by normal operation mode, the staff twists adjusting part (11), elastic component (12) diastole, drive regulating plate (2) and further drive bypass connection piece part upward movement, regulating plate (2) drive main transformer connection piece part upward movement through first bracing piece (22), main transformer connection piece part disconnection simultaneously and first terminal row (8), the connection of second terminal row (9), bypass connection piece part simultaneously and second terminal row (9), third terminal row (10) are connected, main circuit short circuit piece part is connected with first terminal row (8), bypass short circuit piece part and third terminal row (10) disconnection, main transformer change high sleeve current transformer 5LH secondary current to outside main transformer protection screen is introduced in second terminal row (9).
2. The main transformer CT secondary linkage switching terminal with the bypass of the single bus bar according to claim 1, wherein the first terminal row (8) comprises a first A-phase terminal (81), a first B-phase terminal (82), a first C-phase terminal (83), a first N-phase terminal (84), a first terminal body pressing plate (15), a second terminal body pressing plate (16), a third terminal body pressing plate (17) and a fourth terminal body pressing plate (18), the first A-phase terminal (81), the first B-phase terminal (82), the first C-phase terminal (83) and the first N-phase terminal (84) are respectively fixed by the first terminal body pressing plate (15), the second terminal body pressing plate (16), the third terminal body pressing plate (17) and the fourth terminal body pressing plate (18), the first A-phase terminal (81) is connected with the A phase of the secondary current of the main transformer LH, the first B-phase terminal (82) is connected with the B-phase of the main transformer LH secondary current of the main transformer 1, the first C-phase terminal (83) is connected with the first C-phase terminal post (84), and the first N-phase terminal body pressing plate (18) is connected with the main transformer LH;
the second wiring column row (9) comprises a second A-phase wiring column (91), a second B-phase wiring column (92), a second C-phase wiring column (93) and a second N-phase wiring column (94), a fifth terminal body pressing plate (31) and a sixth terminal body pressing plate (32), the fifth terminal body pressing plate (31) is used for fixing the second A-phase wiring column (91) and the second B-phase wiring column (92), and the sixth terminal body pressing plate (32) is used for fixing the second C-phase wiring column (93) and the second N-phase wiring column (94);
the third terminal row (10) comprises a third A-phase terminal (101), a third B-phase terminal (102), a third C-phase terminal (103) and a third N-phase terminal (104), a seventh terminal body pressing plate (20), an eighth terminal body pressing plate (210), a ninth terminal body pressing plate (221) and a tenth terminal body pressing plate (231), wherein the third A-phase terminal (101), the third B-phase terminal (102), the third C-phase terminal (103) and the third N-phase terminal (104) are fixed by the seventh terminal body pressing plate (20), the eighth terminal body pressing plate (210), the ninth terminal body pressing plate (221) and the tenth terminal body pressing plate (231) respectively.
3. The single-bus main transformer CT secondary linkage switching terminal with the bypass is characterized in that a groove (111) used for a worker to screw the adjusting part (11) is formed in the adjusting part (11), the supporting body (13) is cylindrical, an external thread (131) is arranged on the outer side face of the supporting body (13), a first internal thread (211) matched with the external thread (131) is arranged on the inner side face of the first through hole (21), a second internal thread (212) matched with the external thread (131) is arranged on the inner side face of the second through hole (141), and when the worker screws the adjusting part (11) through the groove (111) in the adjusting part (11), the external thread (131) of the supporting body (13) is matched with the first internal thread (211) and the second internal thread (212), the supporting body (13) moves upwards or downwards, the elastic piece (12) expands or contracts, and the adjusting plate (2) is driven to move upwards or downwards.
4. The single bus by-pass main transformer CT secondary linkage switching terminal of claim 3, wherein the first through hole (21) is coaxial with the second through hole (141).
5. The single-bus main transformer CT secondary linkage switching terminal with bypass according to claim 4, wherein the main transformer connecting sheet part comprises a main transformer connecting sheet (41) and a first supporting plate (42), the adjusting plate (2) is connected with the first supporting plate (42) through a first supporting rod (22), the upper bottom surface of the main transformer connecting sheet (41) is fixedly connected with the lower bottom surface of the first supporting plate (42), one side of any one of the first terminal body pressing plate (15), the second terminal body pressing plate (16), the third terminal body pressing plate (17) and the fourth terminal body pressing plate (18) is provided with a first contact sheet (19), the side of any one of the fifth terminal body pressing plate (31) and the sixth terminal body pressing plate (32) opposite to the side of the first contact sheet (19) is provided with a second contact sheet (311), and when the circuit is in a normal operation mode, the lower bottom surface of the main transformer connecting sheet (41) is simultaneously connected with the upper bottom surface of the first contact sheet (19) and the upper bottom surface of the second contact sheet (311); when the circuit is switched from the normal operation mode to the bypass operation mode, the lower bottom surface of the main transformer connecting sheet (41) is disconnected with the upper bottom surface of the first contact sheet (19) and the upper bottom surface of the second contact sheet (311) at the same time.
6. The single-bus main transformer CT secondary linkage switching terminal with bypass according to claim 5, wherein the bypass connecting piece portion comprises a second supporting plate (51) and a bypass connecting piece (52), the second supporting plate (51) is perpendicular to the side surface of the adjusting plate (2) and vertically penetrates through the adjusting plate (2) from the side surface of the adjusting plate (2), the upper bottom surface of the second supporting plate (51) is fixedly connected with the lower bottom surface of the bypass connecting piece (52), the other side of any one of the fifth terminal body pressing plate (31) and the sixth terminal body pressing plate (32) is further provided with a third contact piece (312), the seventh terminal body pressing plate (20), the eighth terminal body pressing plate (210), the ninth terminal body pressing plate (221) and the tenth terminal body pressing plate (231) is provided with a fourth contact piece (24) on the side opposite to the third contact piece (312), when the circuit is switched from the normal operation mode to the bypass operation mode, a worker twists the adjusting member (11), the elastic piece (12) relaxes to drive the adjusting plate (2) to move upwards, the second contact piece (51) is further driven to move upwards, and the fourth contact piece (24) is connected with the fourth contact piece (52); when the circuit is converted from the bypass operation mode to the normal operation mode, the worker twists the adjusting part (11), the elastic part (12) contracts, the adjusting plate (2) is driven to move downwards, the second supporting plate (51) is further driven to move downwards, and the bypass connecting piece (52) is disconnected with the third contact piece (312) and the fourth contact piece (24).
7. The single-bus main transformer CT secondary linkage switching terminal with the bypass according to claim 6, wherein the main shortening connecting piece part comprises a third supporting plate (61) and a main shortening connecting piece (62), the third supporting plate (61) is perpendicular to the adjusting plate (2), one end of the adjusting plate is fixedly connected with the side surface of the third supporting plate (61), the upper bottom surface of the third supporting plate (61) is connected with the lower bottom surface of the main shortening connecting piece (62), any one of the first terminal body pressing plate (15), the second terminal body pressing plate (16), the third terminal body pressing plate (17) and the fourth terminal body pressing plate (18) is further provided with a fifth connecting piece (25), when the circuit is switched from the normal operation mode to the bypass operation mode, a worker twists the adjusting part (11), the elastic piece (12) expands to drive the adjusting plate (2) to move upwards, further drive the third supporting plate (61) to move upwards, and the main shortening connecting piece (62) is connected with the fifth connecting piece (25); when the circuit is converted into a normal operation mode from a bypass operation mode, a worker twists the adjusting part (11), the elastic part (12) contracts, the adjusting plate (2) is driven to move downwards, the third supporting plate (61) is further driven to move downwards, and the main transformer short contact piece (62) is disconnected with the fifth contact piece (25).
8. The single-bus main transformer CT secondary linkage switching terminal with the bypass according to claim 7, wherein the bypass short connecting piece part comprises a fourth supporting plate (71) and a bypass short connecting piece (72), the adjusting plate (2) is fixedly connected with the fourth supporting plate (71) through a second supporting rod (23), the fourth supporting plate (71) is perpendicular to the adjusting plate (2), the lower bottom surface of the fourth supporting plate (71) is connected with the upper bottom surface of the bypass short connecting piece (72), any one of the seventh terminal body pressing plate (20), the eighth terminal body pressing plate (210), the ninth terminal body pressing plate (221) and the tenth terminal body pressing plate (231) is provided with a sixth connecting piece (26),
when the line is converted from the normal operation mode to the bypass operation mode, a worker twists the adjusting part (11), the elastic part (12) expands to drive the adjusting plate (2) to move upwards, the fourth supporting plate (71) is further driven to move upwards through the second supporting rod (23), and the bypass short contact piece (72) is disconnected with the sixth contact piece (26); when the line is converted from the bypass operation mode to the normal operation mode, the worker twists the adjusting part (11), the elastic part (12) contracts to drive the adjusting plate (2) to move downwards, the fourth supporting plate (71) is further driven to move downwards through the second supporting rod (23), and the bypass short contact piece (72) is connected with the sixth contact piece (26).
9. The single-bus main transformer CT secondary linkage switching terminal with the bypass according to claim 8, wherein the thicknesses of the first terminal body pressing plate (15), the second terminal body pressing plate (16), the third terminal body pressing plate (17), the fourth terminal body pressing plate (18), the fifth terminal body pressing plate (31), the sixth terminal body pressing plate (32), the seventh terminal body pressing plate (20), the eighth terminal body pressing plate (210), the ninth terminal body pressing plate (221), and the tenth terminal body pressing plate (231) are all D1, the thicknesses of the main transformer connecting sheet (41), the bypass connecting sheet (52), the main transformer short connecting sheet (62), and the bypass short connecting sheet (72) are all 2D1/3, and the thicknesses of the first contact sheet (19), the second contact sheet (311), the third contact sheet (312), the fourth contact sheet (24), the fifth contact sheet (25), and the sixth contact sheet (26) are all D1/3; when the line is in a normal operation mode, the lower bottom surface of any one of the first contact piece (19), the second contact piece (311), the third contact piece (312), the fourth contact piece (24), the fifth contact piece (25) and the sixth contact piece (26) and the lower bottom surface of any one of the second terminal body pressing plate (16), the third terminal body pressing plate (17), the fourth terminal body pressing plate (18), the fifth terminal body pressing plate (31), the sixth terminal body pressing plate (32), the seventh terminal body pressing plate (20), the eighth terminal body pressing plate (210), the ninth terminal body pressing plate (221) and the tenth terminal body pressing plate (231) are on the same plane, when the line is converted from the normal operation mode to the bypass operation mode, the bypass connecting piece (52) moves upwards by the distance of D1, the third contact piece (312) and the fourth contact piece (24) are pressed by the upward movement of the bypass connecting piece (52), the distance of 2D1/3 is moved upwards, the main connecting piece (62) moves upwards by the distance of the contact post D1, the second terminal (25) moves upwards by the distance of the second terminal, and the second terminal current transformer (9/5) moves upwards by the distance of the second terminal row;
when the circuit is in a bypass operation mode, the upper bottom surface of any one of the first contact piece (19), the second contact piece (311), the third contact piece (312), the fourth contact piece (24), the fifth contact piece (25) and the sixth contact piece (26) and the upper bottom surface of any one of the second terminal body pressing plate (16), the third terminal body pressing plate (17), the fourth terminal body pressing plate (18), the fifth terminal body pressing plate (31), the sixth terminal body pressing plate (32), the seventh terminal body pressing plate (20), the eighth terminal body pressing plate (210), the ninth terminal body pressing plate (221) and the tenth terminal body pressing plate (231) are on the same plane, when the circuit is converted from the bypass operation mode to a normal operation mode, the main transformer (41) moves downwards by a distance of D1, and the first contact piece (19) and the second contact piece (311) move downwards by a distance of 2D1/3 under the downward pressure of the main transformer connecting piece (41); the bypass short contact piece (72) moves downwards by a distance of D1, the sixth contact piece (26) moves upwards by a distance of 2D1/3 under the pressure of the downward movement of the bypass short contact piece (72), and the secondary current of the main transformer high-switching current transformer 1LH is introduced into the second A-phase terminal, the second B-phase terminal, the second C-phase terminal and the second N-phase terminal of the second terminal row (9).
10. The single bus main transformer CT secondary linkage switching terminal with the bypass according to claim 9, wherein during the transition process of the line from the normal operation mode to the bypass operation mode or from the bypass operation mode to the normal operation mode, any one of the main transformer connecting sheet (41), the bypass connecting sheet (52), the main transformer short-circuit sheet (62) and the bypass short-circuit sheet (72) of the single bus main transformer CT secondary linkage switching terminal with the bypass is in a connection state with the line.
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| CN202010768827.2A CN112072618B (en) | 2020-08-03 | 2020-08-03 | Main transformer CT secondary current linkage switching terminal with single bus provided with bypass |
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