CN214505221U - Current transformer with standby secondary terminal - Google Patents
Current transformer with standby secondary terminal Download PDFInfo
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- CN214505221U CN214505221U CN202120550606.8U CN202120550606U CN214505221U CN 214505221 U CN214505221 U CN 214505221U CN 202120550606 U CN202120550606 U CN 202120550606U CN 214505221 U CN214505221 U CN 214505221U
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- 238000004804 winding Methods 0.000 claims abstract description 17
- 239000011810 insulating material Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The utility model discloses a take current transformer of reserve secondary terminal relates to power equipment technical field, especially a take current transformer of reserve secondary terminal, and it includes: the current transformer comprises a current transformer body, a terminal strip and a conducting strip; the utility model discloses current transformer is equipped with a plurality of binding post on every mutual-inductor winding terminal, also is equipped with reserve secondary terminal, and the secondary terminal screw is lost, twists and tears the screw open, burns out and can directly utilize supplementary secondary terminal, has saved and has looked for accessory, maintenance duration, saves man-hour, has improved maintenance efficiency. The utility model discloses the device is equipped with boss, uide pin and second screw, and under the packing force effect of second screw, first conducting strip produces the electrical contact with the second conducting strip to with current transformer's secondary terminal short circuit, avoid wrong wiring, when the wiring is accomplished, through continuing to screw the second screw, with each terminal separation of current transformer, the use comes into operation.
Description
Technical Field
The utility model belongs to the technical field of the power equipment technique and specifically relates to a take current transformer of reserve secondary terminal.
Background
The current transformer enables secondary equipment such as a measuring instrument and relay protection in an electric power system to obtain a sensor of primary loop current information, and enables important electrical equipment in the electric power system to play roles in isolation between a high-voltage system and a low-voltage system and conversion from high-voltage quantity to low-voltage quantity. Whether the current transformer works normally or not is of great significance to the safety of the power system and the normal work of equipment such as protection, measurement and the like.
The principle of the current transformer is to convert a large current into a small current according to a specified proportion, and then the small current converted according to the specified proportion is provided for various metering, relay protection and automatic devices. In the process, the secondary system is isolated from high-voltage equipment, so that the safety of personnel and equipment is ensured. The secondary side of the current transformer is not allowed to be opened in the operation process, once the secondary side is opened, extremely high voltage can be generated to endanger personal safety, the operation of metering, protecting devices and electronic loads is influenced, secondary insulation breakdown is caused, the magnetic circuit of the current transformer is supersaturated, an iron core generates heat, the current transformer is burnt out, fire disasters can be caused, and major accidents are caused. At present, although various measures are provided to avoid the occurrence of open-circuit accidents, such as power-off operation or the mode of detaching a transformer and then wiring, the measures can not be well implemented due to the limitation of the complexity that power equipment can not be powered off in operation and the transformer can not be detached
In the new installation, replacement and operation processes of the current transformer, the secondary terminal has the following problems:
1. newly-participated workers and trainees usually drop secondary screws into the box transformer substation;
2. the secondary screw is screwed and disassembled in the screw hole;
3. for an old-fashioned transformer substation, the current transformer cannot be subjected to secondary short circuit at the terminal strip when the current transformation ratio is adjusted in operation;
4. the secondary terminal is burned out by virtual connection.
Application No. 201210449719.4, grant publication No. CN 103812098B, entitled: the invention discloses a secondary open-circuit protection device of a current transformer, which comprises an insulating upper cover, a PCB (printed Circuit Board) control board and an insulating lower cover, wherein a load terminal, a normally closed normally open switch, an indicator lamp and a transformer terminal are welded on the PCB control board, the load terminal is connected with a load, the transformer terminal is connected with a transformer, the transformer is directly connected with the load when the normally closed normally open switch is in a normally closed state, and two ends of the transformer are connected when the normally closed normally open switch is in a normally open state. The invention has simple operation, and can safely carry out wiring operation on the current transformer only by using the normally closed and normally open switch to conduct the two ends of the current transformer and confirming that the two ends of the current transformer are conducted.
The structure adopted by the invention is a structure for preventing the secondary open circuit of the current transformer in an electronic mode, and the stability of the electronic structure is slightly poor compared with that of a mechanical structure.
201410444859.1, publication CN 105449655B, entitled as an invention patent of a secondary open circuit protection method and a secondary open circuit protection device for a current transformer, and discloses the secondary open circuit protection method and the secondary open circuit protection device for the current transformer, wherein the method is to monitor the voltage of a secondary side loop of the current transformer, when the secondary side is open, the voltage becomes very large, the secondary side loop of the current transformer is short-circuited, and the device is used for reminding workers of equipment damage, and comprises a shell, a driving mechanism, a transmission mechanism and a short-circuit mechanism, wherein the driving mechanism consists of a relay, an electric telescopic rod and a connecting plug, the relay is connected to the secondary side of the current transformer by the connecting plug, the driving mechanism comprises a base, a transmission rod is arranged on the base through a support, the short-circuit mechanism comprises a copper plate, and a plug is arranged below the copper plate, the copper plate is wrapped by an insulating material. The invention applies the technology of a relay control circuit, when the voltage changes, the relay starts the telescopic rod to push the transmission rod to insert the short-circuit plug into the secondary side loop terminal, so as to short-circuit the secondary side loop.
The invention discloses a high-voltage driving device which is generated when a current transformer is in an open circuit and is used for short-circuiting the secondary side of the current transformer, and the problem of open circuit of the current transformer caused by misconnection in wiring cannot be solved.
Disclosure of Invention
The utility model provides a take current transformer of reserve secondary terminal for solve current transformer binding post awkward problem among the prior art.
The utility model adopts the following technical scheme:
a current transformer with a backup secondary terminal, comprising: the current transformer comprises a current transformer body, a terminal strip and a conducting strip;
the terminal strip is made of insulating materials; the conducting strips are detachably connected with the terminal strip;
the current transformer body comprises a winding, the winding is provided with a winding joint, and the winding joint is electrically connected with the conducting strip; the number of the conducting strips is the same as that of the winding joints;
the conducting strip is provided with at least two wiring terminal mounting holes.
Further, the terminal block includes: the terminal strip comprises a terminal strip body, a boss and a guide pin, wherein the boss is fixedly arranged on the upper surface of the terminal strip body, and the guide pin is fixedly arranged on the upper surface of the boss; the terminal strip body is provided with a second threaded hole;
the conductive sheet includes: the second screw, the first conducting strip and the second conducting strip; the first conducting strip is arranged on the upper surface of the terminal strip body; the second conducting strip is an elastic conducting strip;
the second conducting plate is provided with a pin hole and a second mounting hole, the pin hole is in clearance fit with the guide pin, and the second screw penetrates through the second mounting hole and is in threaded connection with the second threaded hole;
the second conductive sheet is arranged above the first conductive sheet.
Further, the first conductive sheet includes: the first conductive sheet body and the first contact; the first contact is fixedly arranged at one end of the first conducting strip body, and the first contact is arranged on the upper surface of the first conducting strip body;
the second conductive sheet includes: the second conductive sheet body and the second contact; the second contact is fixedly arranged at one end of the second conducting strip body, and the second contact is arranged on the lower surface of the second conducting strip body.
Further, the height of the boss is smaller than the sum of the thickness of the first conductive sheet body, the thickness of the first contact and the thickness of the second contact.
Further, the thickness of the second conductive sheet body is smaller than the height of the guide pin.
Further, the upper surface of the guide pin is provided with a chamfer.
Further, still include: the terminal block body is provided with a first threaded hole, the number of the first threaded holes is equal to that of the first mounting holes, the first screw penetrates through the first mounting hole, and the first screw is in threaded connection with the first threaded hole.
Further, the chamfer color of the upper surface of the guide pin is different from the color of the guide pin body.
Further, still include: and the second conductive sheet is provided with a third threaded hole, and the third screw is matched with the third threaded hole.
Further, still include: a washer adapted to the first, second, and third screws.
The utility model discloses an actively the effect as follows:
a current transformer with a backup secondary terminal, comprising: the current transformer comprises a current transformer body, a terminal strip and a conducting strip;
the utility model discloses current transformer is equipped with a plurality of binding post on every mutual-inductor winding terminal, also is equipped with reserve secondary terminal, and the secondary terminal screw is lost, twists and tears the screw open, burns out and can directly utilize supplementary secondary terminal, has saved and has looked for accessory, maintenance duration, saves man-hour, has improved maintenance efficiency. Especially, when the secondary terminal is burnt out due to virtual connection, the scrapping of the current transformer is avoided by using the auxiliary terminal. The maintenance and the adjustment of the transformation ratio are facilitated.
The device of the utility model is provided with a boss, a guide pin and a second screw, and under the action of the pressing force of the second screw, the first conducting strip is in electric contact with the second conducting strip, so that the secondary terminal of the current transformer is short-circuited, the wrong wiring is avoided, and the current transformer is burnt down due to the secondary open circuit of the current transformer; the first conducting plate and the second conducting plate are both provided with contacts, and are in electric contact through the contacts, so that the contact resistance is small, and the reliability of short circuit between the conducting plates is ensured; when the wiring is completed, the second screw is continuously screwed, the terminals of the current transformer are separated, the current transformer can be put into use, the separation and short connection modes are simple, and the use is convenient.
The height of the boss is smaller than the sum of the thickness of the first conducting strip body, the thickness of the first contact and the thickness of the second contact, so that the boss does not support the second conducting strip at the beginning of the electric contact between the first conducting strip and the second conducting strip; the guide pin is provided with a chamfer so that the guide pin can be conveniently connected into the pin hole in a serial mode, the color of the chamfer of the guide pin is different from that of the body, and the communication state between the first conducting plate and the second conducting plate can be judged according to the exposed degree of the chamfer of the guide pin.
The utility model discloses current transformer is equipped with a plurality of binding post, screws the wire through the screw, and contact resistance is little, and the wiring mode is simple.
Drawings
Fig. 1 is a perspective view of a connection terminal according to an embodiment of the present invention;
fig. 2 is a top view of a connection terminal according to an embodiment of the present invention;
fig. 3 is a front view of a connection terminal according to an embodiment of the present invention;
fig. 4 is a front sectional view of a connection terminal according to an embodiment of the present invention;
fig. 5 is a perspective view of the terminal block according to the embodiment of the present invention.
In the figure:
1 terminal row body;
2, a boss;
3, a guide pin;
4 a second threaded hole;
5 a second screw;
6 pin holes;
7 a second mounting hole;
8 a first conductive sheet body;
9 a first contact;
10 a second conductive sheet body;
11 a second contact;
12 a first screw;
13 a first mounting hole;
14 a first threaded hole;
15 a third screw;
16 a third threaded hole;
17 shim.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
As shown in fig. 1 to 5, a current transformer with a backup secondary terminal includes: a current transformer with a backup secondary terminal, comprising: the current transformer comprises a current transformer body, a terminal strip and a conducting strip;
the terminal strip is made of insulating materials; the conducting strips are detachably connected with the terminal strip;
the current transformer body comprises a winding, the winding is provided with a winding joint, and the winding joint is electrically connected with the conducting strip; the number of the conducting strips is the same as that of the winding joints;
the conducting strip is provided with at least two wiring terminal mounting holes.
Further, the terminal block includes: the terminal block comprises a terminal block body 1, a boss 2 and a guide pin 3, wherein the boss 2 is fixedly arranged on the upper surface of the terminal block body 1, and the guide pin 3 is fixedly arranged on the upper surface of the boss 2; the terminal strip body 1 is provided with a second threaded hole 4;
the conductive sheet includes: the second screw 5, the first conducting strip and the second conducting strip; the first conducting strip is arranged on the upper surface of the terminal strip body 1; the second conducting strip is an elastic conducting strip;
the second conducting strip is provided with a pin hole 6 and a second mounting hole 7, the pin hole 6 is in clearance fit with the guide pin 3, and the second screw 5 penetrates through the second mounting hole 7 and is in threaded connection with the second threaded hole 4;
the second conductive sheet is arranged above the first conductive sheet.
Further, the first conductive sheet includes: a first conductive sheet body 8 and a first contact 9; the first contact 9 is fixedly arranged at one end of the first conductive sheet body 8, and the first contact 9 is arranged on the upper surface of the first conductive sheet body 8;
the second conductive sheet includes: a second conductive sheet body 10 and a second contact 11; the second contact 11 is fixedly arranged at one end of the second conductive sheet body 10, and the second contact 11 is arranged on the lower surface of the second conductive sheet body 10.
Further, the height of the boss 2 is smaller than the sum of the thickness of the first conductive sheet body 8, the thickness of the first contact 9, and the thickness of the second contact 11.
Further, the second conductive sheet body 10 is smaller in thickness than the height of the guide pin 3.
Further, the upper surface of the guide pin 3 is provided with a chamfer.
Further, the chamfer color of the upper surface of the guide pin 3 is different from the color of the body of the guide pin 3.
More specifically, the utility model discloses current transformer is equipped with a plurality of binding post on every mutual-inductor winding terminal, also is equipped with reserve secondary terminal, and secondary terminal screw is lost, twists and tears the screw open, burns out and can directly utilize supplementary secondary terminal, has saved and has looked for accessory, maintenance duration, saves man-hour, has improved maintenance efficiency. Especially, when the secondary terminal is burnt out due to virtual connection, the scrapping of the current transformer is avoided by using the auxiliary terminal. The maintenance and the adjustment of the transformation ratio are facilitated.
The utility model discloses still be equipped with the function of preventing that current transformer secondary is opened a way, as shown in the figure, the second conducting strip is under the fastening force of second screw 5, the second contact 11 of second conducting strip at first with the first contact 9 electrical contact of first conducting strip, current transformer secondary terminal is in short circuit state, at this moment, for leaving factory's stand-by state.
When the wiring is required to be installed, the first conducting plate is firstly wired, two first conducting plates are arranged in the embodiment, at the moment, the first conducting plate and the second conducting plate are always in a short circuit state, the second conducting plate is wired after the first conducting plate is wired, the second screw 5 is screwed after the second conducting plate is wired, the first conducting plate is elastically deformed under the fastening action of the second screw 5, the central part of the second conducting plate is deformed downwards, the boss 2 is abutted to the peripheral part of the pin hole 6, the boss 2 serves as a fulcrum, so that the first contact 9 at one end of the first conducting plate is tilted, the first contact 9 of the first conducting plate is separated from the second contact 11 of the second conducting plate, the circuit breaking between secondary terminals of the current transformer is realized, and the wiring is completed.
When the current transformer needs to be dismantled, the second screw 5 is loosened, the first conducting plate is elastically deformed and returns to the original shape, the first contact 9 of the first conducting plate is contacted with the second contact 11 of the second conducting plate, short circuit occurs between secondary terminals of the current transformer, then the wires connected with the first conducting plate and the second conducting plate are dismantled, and the dismantling work of the current transformer is completed.
Because the height of the boss 2 is less than the sum of the thickness of the first conductive sheet body 8, the thickness of the first contact 9 and the thickness of the second contact 11, at the beginning of the electrical contact between the first contact 9 of the first conductive sheet and the second contact 11 of the second conductive sheet, the periphery of the pin hole 6 of the first conductive sheet is not contacted with the boss 2, so that the two ends of the first conductive sheet are not tilted.
The thickness of the second conductive plate body 10 is smaller than that of the guide pin 3, and in the embodiment, the sum of the height of the guide pin 3 and the height of the boss 2 is equal to the sum of the thickness of the first conductive plate body 8, the thickness of the second conductive plate, the thickness of the first contact 9 and the thickness of the second contact 11, so that the first contact 9 of the first conductive plate and the second contact 11 of the second conductive plate are in electric contact with each other at the beginning, the upper surface of the guide pin 3 is flush with the upper surface of the second conductive plate, and whether the first conductive plate and the second conductive plate are in electric contact with each other can be judged by judging whether the upper surface of the guide pin 3 is flush with the second conductive plate or not.
When the periphery of the pin hole 6 of the first conducting plate is contacted with the boss 2, the length of the guide pin 3 is greater than the thickness of the second conducting plate body 10, so that the guide pin 3 is exposed out of the pin hole 6 more, in the embodiment, the guide pin 3 is provided with a chamfer, the chamfer has two functions, the pin hole 6 is conveniently sleeved into the guide pin 3, in addition, because the chamfer part is coated with red paint, when the red paint is exposed out of the second conducting plate body 10 more, the first contact 9 of the first conducting plate is separated from the second contact 11 of the second conducting plate, and the secondary side of the current transformer is disconnected.
The utility model is provided with a boss 2, a guide pin 3 and a second screw 5, and under the action of the pressing force of the second screw 5, the first conducting strip and the second conducting strip are in electric contact, so that the secondary terminal of the current transformer is short-circuited, and the wrong wiring is avoided, the secondary open circuit of the current transformer is caused, and the current transformer is burnt; the first conducting plate and the second conducting plate are both provided with contacts, and are in electric contact through the contacts, so that the contact resistance is small, and the reliability of short circuit between the conducting plates is ensured; the height of the boss 2 is less than the sum of the thickness of the first conducting strip body 8, the thickness of the first contact 9 and the thickness of the second contact 11, so that the boss 2 does not support the second conducting strip at the beginning of the electric contact between the first conducting strip and the second conducting strip; the guide pin 3 is provided with a chamfer so that the guide pin 3 can be conveniently connected into the pin hole 6 in a serial mode, the chamfer color of the guide pin 3 is different from the body color, and the communication state between the first conducting plate and the second conducting plate can be judged through the exposed degree of the chamfer of the guide pin 3.
Further, still include: the terminal block comprises a first screw 12, the first conductive sheet body 8 is provided with a first mounting hole 13, the number of the first mounting holes 13 is at least three, the terminal block body 1 is provided with a first threaded hole 14, the number of the first threaded holes 14 is the same as that of the first mounting holes 13, the first screw 12 penetrates through the first mounting hole 13, and the first screw 12 is in threaded connection with the first threaded hole 14.
Further, still include: and the second conducting strip is provided with a third threaded hole 16, and the third screw 15 is matched with the third threaded hole 16.
Further, still include: a washer 17, said washer 17 being adapted to said first screw 12, said second screw 5 and said third screw 15.
More specifically, in this embodiment, the first conductive sheet is provided with three first mounting holes 13, the terminal block body 1 is provided with three first threaded holes 14, the first threaded holes 14 are matched with the positions of the first mounting holes 13, the first screw 12 presses the first conductive sheet onto the terminal block body 1 through the gasket 17, and during wiring, only the first screw 12 needs to be loosened, the wire is pressed into the lower part of the gasket 17, and the first screw 12 is screwed.
The second conducting strip is provided with a third threaded hole 16, and when wiring is carried out, a conducting wire is pressed into the lower part of the gasket 17 and then is screwed by a third screw 15.
The utility model discloses current transformer is equipped with a plurality of binding post, screws the wire through the screw, and contact resistance is little, and the wiring mode is simple.
The above embodiments are only preferred embodiments of the present invention, and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. A current transformer with a standby secondary terminal is characterized by comprising: the current transformer comprises a current transformer body, a terminal strip and a conducting strip;
the terminal strip is made of insulating materials; the conducting strips are detachably connected with the terminal strip;
the current transformer body comprises a winding, and the winding is provided with a winding joint which is electrically connected with the conducting strip; the number of the conducting strips is the same as that of the winding joints;
the conducting strip is provided with at least two wiring terminal mounting holes.
2. The current transformer with backup secondary terminal as claimed in claim 1, wherein said terminal block comprises: the terminal block comprises a terminal block body (1), a boss (2) and a guide pin (3), wherein the boss (2) is fixedly arranged on the upper surface of the terminal block body (1), and the guide pin (3) is fixedly arranged on the upper surface of the boss (2); the terminal row body (1) is provided with a second threaded hole (4);
the conductive sheet includes: the second screw (5), the first conducting strip and the second conducting strip; the first conducting strip is arranged on the upper surface of the terminal strip body (1); the second conducting strip is an elastic conducting strip;
the second conducting strip is provided with a pin hole (6) and a second mounting hole (7), the pin hole (6) is in clearance fit with the guide pin (3), and the second screw (5) penetrates through the second mounting hole (7) and is in threaded connection with the second threaded hole (4);
the second conductive sheet is arranged above the first conductive sheet.
3. The current transformer with backup secondary terminal as claimed in claim 2, wherein said first conductive sheet comprises: a first conductive sheet body (8) and a first contact (9); the first contact (9) is fixedly arranged at one end of the first conducting strip body (8), and the first contact (9) is arranged on the upper surface of the first conducting strip body (8);
the second conductive sheet includes: a second conductive sheet body (10) and a second contact (11); the second contact (11) is fixedly arranged at one end of the second conducting strip body (10), and the second contact (11) is arranged on the lower surface of the second conducting strip body (10).
4. The current transformer with standby secondary terminal according to claim 3, characterized in that the boss (2) height is less than the sum of the first conductive sheet body (8) thickness, the first contact (9) thickness and the second contact (11) thickness.
5. The current transformer with standby secondary terminal as claimed in claim 4, wherein the second conductive sheet body (10) has a thickness smaller than the height of the guide pin (3).
6. The current transformer with spare secondary terminal as claimed in claim 5, wherein the upper surface of the guide pin (3) is chamfered.
7. The current transformer with spare secondary terminal of claim 6, further comprising: the terminal block comprises a first screw (12), wherein a first conducting strip body (8) is provided with a first mounting hole (13), the number of the first mounting holes (13) is at least three, a terminal block body (1) is provided with a first threaded hole (14), the number of the first threaded holes (14) is the same as that of the first mounting holes (13), the first screw (12) penetrates through the first mounting hole (13), and the first screw (12) is in threaded connection with the first threaded hole (14).
8. The current transformer with the standby secondary terminal as claimed in claim 7, wherein the chamfer color of the upper surface of the guide pin (3) is different from the color of the body of the guide pin (3).
9. The current transformer with backup secondary terminal of claim 8, further comprising: and the second conducting strip is provided with a third threaded hole (16), and the third screw (15) is matched with the third threaded hole (16).
10. The current transformer with backup secondary terminal of claim 9, further comprising: a washer (17), said washer (17) being adapted to said first screw (12), said second screw (5) and said third screw (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120550606.8U CN214505221U (en) | 2021-03-17 | 2021-03-17 | Current transformer with standby secondary terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120550606.8U CN214505221U (en) | 2021-03-17 | 2021-03-17 | Current transformer with standby secondary terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214505221U true CN214505221U (en) | 2021-10-26 |
Family
ID=78198014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120550606.8U Active CN214505221U (en) | 2021-03-17 | 2021-03-17 | Current transformer with standby secondary terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214505221U (en) |
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2021
- 2021-03-17 CN CN202120550606.8U patent/CN214505221U/en active Active
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