CN111521847A - Lightning arrester direct current test wiring converter - Google Patents
Lightning arrester direct current test wiring converter Download PDFInfo
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- CN111521847A CN111521847A CN202010431309.1A CN202010431309A CN111521847A CN 111521847 A CN111521847 A CN 111521847A CN 202010431309 A CN202010431309 A CN 202010431309A CN 111521847 A CN111521847 A CN 111521847A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
A lightning arrester DC test wiring converter, comprising: the converter adopts a motor to drive the insulating rotating arm to rotate, so that the electric connection state of the movable contact and the fixed contact is controlled. The lightning arrester direct-current test wiring converter is applied, only one-time wiring is needed, the wiring is not needed to be manually and frequently adjusted, the operation is simple and convenient, the test operation process of an operator is isolated from an external high-voltage direct-current power supply, and the safety is guaranteed. The insulating rotating shaft and the insulating rotating arm are both insulating structures, and the structures can ensure that the pressurizing process cannot discharge to the ground or other parts through setting the distance between the contacts, so that the use safety of equipment is ensured. The converter is also provided with a rotation control relay group and a lightning arrester direct current test wiring converter of a limit switch, when the electric connection process of the movable contact and the stationary contact is adjusted, a worker does not need to watch, the rotation switch is pressed down, and the motor drives the movable contact to rotate to the target stationary contact position and then stops, so that the operation is simple.
Description
Technical Field
The invention relates to the technical field of lightning arrester tests, and particularly belongs to a direct-current test device for an electric lightning arrester.
Background
The lightning arrester is applied to an electric power system and mainly aims to inhibit lightning or operate overvoltage so as to guarantee the stable operation of the electric power system. With the development of technology, the application range of the metal oxide arrester gradually expands and finally becomes the mainstream type of arrester selection in the power system.
Generally, the size of the lightning arrester becomes larger along with the rise of the voltage level, a plurality of sections of lightning arresters with the voltage level of 220kV and above are often more than 5m away from the ground, field test personnel need to use means such as an insulating ladder or a lift truck for wiring, after the test wiring with the lightning arrester is fixed, the angle of the wiring between the test equipment and the lightning arrester is adjusted by moving the ground test equipment, and field test is carried out.
In the actual lightning arrester test, the position of the test equipment is repeatedly adjusted, multiple times of discharging and multiple times of wiring are needed in the test process, the number of dangerous points is large, and the workload is large. How to simplify the operation and improve the safety of the operation process is a problem which needs to be solved urgently by people in the related technical field.
Disclosure of Invention
The invention provides a lightning arrester direct current test wiring converter which is used for solving the problem that frequent manual wiring is needed in a power lightning arrester direct current test.
The invention adopts the following technical scheme:
a lightning arrester DC test wiring converter, comprising: the device comprises a body, a rotating group rotationally connected with the body and a wiring group fixedly connected with the body; the rotating group is used for controlling the wiring group to form different electric connection forms; the body comprises an insulating plate;
the rotating group comprises: the motor is fixedly connected with the insulating plate, the insulating rotating shaft is rotatably connected with the insulating plate, and the insulating rotating arm is fixedly connected with the insulating rotating shaft; the wiring group includes: the fixed contact and the wiring terminal are respectively and fixedly connected with the insulating plate, and the movable contact is fixedly connected with the insulating rotating arm.
Further, the movable contact is an elastic conducting strip.
Further, the wiring group further includes: and the conducting wire is a shielding wire, one end of the conducting wire is electrically connected with the movable contact, and the other end of the conducting wire is electrically connected with the wiring terminal.
Furthermore, the rotating group further comprises a limit switch, the limit switch is arranged on the insulating plate, and the limit switch is used for feeding back the rotation limit position of the insulating rotating arm.
Further, the rotating group further comprises: the insulation bearing seat is fixedly connected with the insulation plate, the outer ring of the insulation bearing is fixedly connected with the insulation bearing seat, and the insulation rotating shaft is fixedly connected with the inner ring of the insulation bearing. .
Further, the insulating rotating arm is provided with a hole, and the conducting wire is arranged in the hole of the insulating rotating arm.
Further, still include: the rotation control relay group is used for controlling the insulation rotating arm to rotate to a position limited by the limit switch;
the rotation control relay set includes: the rotary switch is used for controlling the rotary relay, the rotary relay and the limit relay are used for controlling the motor to drive the insulating rotating arm to rotate to the position limited by the limit switch.
Further, the rotary switch is a self-locking switch.
Further, the rotation control relay set further includes: and the rotating group indicator light circuit is used for indicating the position of the insulating rotating arm.
Further, the rotation control relay set further includes: and the power switch is used for controlling the opening and closing of the power supply.
The invention has the following positive effects:
a lightning arrester direct current test wiring converter adopts a motor to drive an insulating rotating arm to rotate, so that the electric connection state of a movable contact and a fixed contact is controlled. The lightning arrester direct-current test wiring converter is applied, only one-time wiring is needed, manual frequent wiring adjustment is not needed, all wiring adjustment operations are achieved on the converter, an operator only needs to operate a button to achieve conversion among different wiring modes, the test operation process of the operator is isolated from an external high-voltage direct-current power supply, and safety is guaranteed.
The insulating rotating shaft and the insulating rotating arm are both insulating structures, and the distance between contacts can be set by applying the insulating rotating shaft and the insulating rotating arm, so that the discharge to the ground or other parts can not be caused in the pressurizing process, and the use safety of equipment can be ensured; the movable contact is an elastic conducting strip, and the elastic strip can provide small compression buffering while ensuring electrical connection. The movable contact is ensured to contact the movable contact first to realize the gas connection in the rotating process of the insulating rotating arm and then continuously rotate for a small stroke, and then the limit switch is triggered to stop the motor.
The lightning arrester direct-current test wiring converter provided with the rotation control relay group and the limit switch is simple to operate, when the electric connection process of the movable contact and the fixed contact is adjusted, a worker does not need to keep on duty, the rotation switch is pressed down, and the motor drives the movable contact to rotate to the target fixed contact position and then stops.
When the indicating lamp circuit of the rotating group rotates to the target position through the insulating arm, the indicating lamp is turned on, an operator can know the current connection state all the way, and when the operating state is not required, the power switch is turned off, so that the situation that the equipment is damaged due to mistaken touch of an operator can be prevented.
Drawings
FIG. 1 is a schematic structural diagram of a DC test wiring converter for lightning arresters according to the present invention;
FIG. 2 is a schematic view of an insulating boom according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the connection between the DC test wiring converter and the lightning arrester according to the embodiment of the invention;
fig. 4 is a schematic diagram of a connection of a rotation control relay set according to an embodiment of the present invention.
In the figure: the device comprises an insulating plate 1, a motor 2, an insulating rotating shaft 3, an insulating rotating arm 4, a fixed contact 5, a movable contact 6, a wiring terminal 7, a lead 8, a limit switch 9, an insulating bearing 10, an insulating bearing seat 11, a first test wire 12, a second test wire 13, an external ammeter 14, a direct-current high-voltage generator 15, a first fixed contact 5-1, a second fixed contact 5-2, a third fixed contact 5-3, a fourth fixed contact 5-4, a first movable contact 6-1, a second movable contact 6-2, a first wiring terminal 7-1 and a second wiring terminal 7-2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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 intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 4, a lightning arrester dc test wiring converter includes: the device comprises a body, a rotating group rotationally connected with the body and a wiring group fixedly connected with the body; the rotating group is used for controlling the wiring group to form different electric connection forms.
The body comprises an insulating plate 1; the rotating group includes: the motor 2 is fixedly connected with the insulating plate 1, the insulating rotating shaft 3 is rotatably connected with the insulating plate 1, and the insulating rotating arm 4 is fixedly connected with the insulating rotating shaft 3, and the motor 2 is in transmission connection with the insulating rotating shaft 3.
The insulation rotating shaft 3 is rotatably connected with the insulation plate 1 through an insulation bearing 10, the insulation bearing seat 11 is fixedly connected with the insulation plate 1, the insulation bearing 10 is fixedly connected with the insulation bearing seat 11, and the insulation rotating shaft 3 is fixedly connected with the insulation bearing 10; the insulating plate 1, the insulating rotating shaft 3, the insulating rotating arm 4, the insulating bearing 10 and the insulating bearing seat 11 are all made of insulating materials. The motor 2 housing is electrically connected to an external ground.
The wiring group includes: the insulation device comprises a fixed contact 5, a movable contact 6, a lead 8 and a wiring terminal 7, wherein the fixed contact 5 and the wiring terminal 7 are respectively and fixedly connected with an insulation plate 1, the movable contact 6 is fixedly connected with an insulation rotating arm 4, and the insulation rotating arm 4 drives the movable contact 6 to be electrically connected with the fixed contact 5.
The movable contact 6 is an elastic conducting strip made of phosphor bronze. The conducting wire 8 is a shielding wire, one end of which is electrically connected with the moving contact 6, and the other end of which is electrically connected with the wiring terminal 7. The insulating tumbler 4 is provided with a hole and the wire 8 is arranged in the hole of the insulating tumbler 4.
More specifically, the motor 2 is fixedly connected with the insulating plate 1 through a bolt, an output shaft of the motor 2 is fixedly connected with the insulating rotating shaft 3 through a coupler, the coupler is made of insulating materials, the insulating rotating shaft 3 is fixedly connected with an inner ring of an insulating bearing 10, an outer ring of the bearing is fixedly connected with an insulating bearing seat 11, and the insulating rotating arm 4 and the insulating rotating shaft 3 are of an integrated structure and are vertically arranged.
The insulating rotating arm 4 is provided with a hole along the length direction of the insulating rotating arm 4, a conducting wire 8 is arranged in the hole of the insulating rotating arm 4, the conducting wire 8 is a two-core shielded wire in the embodiment, the conducting wire 8 is provided with a core wire and a shielding layer, two groups of fixed contacts 5 and two groups of movable contacts 6 are arranged, one end of the shielding layer of the conducting wire 8 is connected with the first movable contact 6-1, the other end of the shielding layer of the conducting wire 8 is connected with the first wiring terminal 7-1, one end of the core wire of the conducting wire 8 is connected with the second movable contact 6-2.
In the embodiment, the coupler, the insulating plate 1, the insulating rotating shaft 3, the insulating rotating arm 4 and the insulating bearing seat 11 are all made of epoxy resin plates, and the epoxy resin plates are formed by bonding glass fiber cloth and epoxy resin. The epoxy resin body is an excellent insulating material with high dielectric property, surface leakage resistance and electric arc resistance, and the insulating bearing 10 is a ceramic bearing.
The lightning arrester direct current test wiring converter ensures that the lightning arrester direct current test wiring converter cannot discharge to the ground or other components in the pressurizing process.
The lightning arrester direct current test wiring converter can be connected with external lightning arresters in different forms, and the use process is described by taking a first section and a third section of a three-section type lightning arrester as examples in the embodiment.
Lightning arrester direct current test wiring converter and outside lightning arrester mode of connection: the lightning arrester direct current test wiring converter is arranged into two static contact groups, each static contact group comprises two static contacts, a first static contact 5-1 and a second static contact 5-2 are arranged on the first side of an insulating plate 1, a third static contact 5-3 and a fourth static contact 5-4 are arranged on the second side of the insulating plate 1, and a movable contact 6 is driven by an insulating rotating arm 4 to realize that the first movable contact 6-1 is electrically connected with the first static contact 5-1 and the second movable contact 6-2 is electrically connected with the second static contact 5-2, or the first movable contact 6-1 is electrically connected with the third static contact 5-3 and the second movable contact 6-2 is electrically connected with the fourth static contact 5-4.
The first test wire 12 and the second test wire 13 are both external wires, and the first test wire 12 and the second test wire 13 are both shielded wires. One end of a core wire of the first test wire 12 is connected with a lower flange of a first section of the lightning arrester, the other end of the core wire is connected with a fourth static contact 5-4 of a direct-current test wiring converter of the lightning arrester, and a shielding wire of the first test wire is connected with a third static contact 5-3 of the converter.
One end of the second test wire core wire is connected with the upper flange of the third section of the lightning arrester, the other end of the second test wire core wire is connected with the second static contact 5-2 of the lightning arrester direct current test wiring converter, and the shielding wire of the second test wire is connected with the first static contact 5-1 of the converter.
The second connecting terminal 7-2 of the lightning arrester direct current test wiring converter is connected with a core wire of an ammeter at the top end of an external direct current high voltage generator 15, and the first connecting terminal 7-1 is connected with a shell of the ammeter at the top end of the direct current high voltage generator 15. The third section lower flange of the lightning arrester is connected with the ground through an external ammeter 14, and the first section upper flange is connected with the ground in the original state without adjustment.
During testing, the motor 2 is controlled to rotate in the forward direction to enable the first movable contact 6-1 to be electrically connected with the first fixed contact 5-1, the second movable contact 6-2 to be electrically connected with the second fixed contact 5-2, the external direct-current high-voltage generator 15 is opened and adjusted until the visual value of the ammeter 14 reaches the test current nmA, the embodiment is 1mA, and the output voltage value UnmA of the direct-current high-voltage generator at the moment is recorded.
And then adjusting the output voltage of the external direct current high voltage generator 15 to 0.75UnmA, recording the visual value of the ammeter 14 under the voltage of 0.75UnmA, closing the external direct current high voltage generator 15, discharging, and finishing the third section of test.
And controlling the motor 2 to rotate reversely to enable the first movable contact 6-1 to be electrically connected with the third fixed contact 5-3 and the second movable contact 6-2 to be electrically connected with the fourth fixed contact 5-4, opening and adjusting the external direct-current high-voltage generator 15 until the visual value of the ammeter 14 reaches nmA, wherein the visual value of the ammeter is 1mA in the embodiment, and recording the output voltage value UnmA of the direct-current high-voltage generator at the moment.
And then adjusting the output voltage of the external direct current high voltage generator 15 to 0.75UnmA, recording the difference value between the visual value of the ammeter at the top end of the direct current high voltage generator 15 and the visual value of the external ammeter 14, closing the external direct current high voltage generator 15, discharging, and finishing the first section of test.
A lightning arrester direct current test wiring converter adopts a motor 2 to drive an insulating rotating arm 4 to rotate, so that the electric connection state of a movable contact 6 and a fixed contact 5 is controlled. The lightning arrester direct-current test wiring converter is applied, only one-time wiring is needed, the wiring is not needed to be adjusted frequently, the operation is simple and convenient, the test operation process of an operator is isolated from an external direct-current high-voltage power supply, and the safety is guaranteed.
The insulating rotating shaft 3 and the insulating rotating arm 4 are both of insulating structures and have enough safety distance, so that the discharge to the ground or other parts can not occur in the pressurizing process, and the use safety of equipment can be ensured; the movable contact 6 is an elastic conducting strip, and the elastic strip can provide small compression buffering while ensuring electrical connection. The movable contact 6 is ensured to firstly contact the movable contact 6 to realize electrical connection in the rotating process of the insulating rotating arm 4, then the movable contact continues to rotate for a small stroke, and then the stroke switch is triggered to stop the motor.
Further, the rotating group further comprises a limit switch 9, the limit switch 9 is arranged on the insulating plate 1, and the limit switch 9 is used for feeding back the rotation limit position of the insulating rotating arm 4.
The lightning arrester direct current test wiring converter further comprises a rotation control relay group, and the rotation control relay group is used for controlling the insulating rotating arm 4 to rotate to the position limited by the limit switch 9.
The rotation control relay set includes: the rotary switch SB1, the limit relay KM8 and the rotary relay KM10, the rotary switch SB1 is used for controlling the rotary relay KM10, and the rotary relay KM10 and the limit relay KM8 are used for controlling the motor 2 to drive the insulating rotary arm 4 to rotate to the position limited by the limit switch 9. The rotating switch SB1 is a self-locking switch, and is closed by pressing a contact to be self-locked and then opened by pressing the contact.
More specifically, the insulating rotating shaft 3 of the present embodiment is further provided with a positioning rod, and the positioning rod is made of an insulating material and is fixedly connected with the insulating rotating shaft 3. The limit switch 9 is a normally open switch. When the first movable contact 6-1 is contacted with the first fixed contact 5-1 and the second movable contact 6-2 is contacted with the second fixed contact 5-2, the positioning rod triggers the limit switch 9 to act, and the limit switch 9 is closed.
The first end of the rotary switch SB1 is electrically connected with the positive pole of the power supply, the second end is electrically connected with the first end of the coil of the rotary relay KM10, and the second end of the coil of the rotary relay KM10 is electrically connected with the negative pole of the power supply.
The first end of the limit switch 9 is electrically connected with the positive pole of a power supply, the second end of the limit switch is electrically connected with the first end of a coil of a limit relay KM8, and the second end of the coil of the limit relay KM8 is electrically connected with the negative pole of the power supply.
The first end of the first normally closed contact KM81 of limit relay is connected with the positive pole electricity of power, the second end is connected with the first end electricity of the first normally open contact KM101 of rotary relay, the first normally open contact KM101 second end of rotary relay is connected with the first utmost point electricity of motor 2, the motor 2 second pole is connected with the first end electricity of limit relay second normally closed contact KM82, the second end of limit relay second normally closed contact KM82 is connected with the first end electricity of rotary relay second normally open contact KM102, the second end of rotary relay second normally open contact KM102 is connected with power negative pole electricity.
The working process is as follows: when the rotating switch SB1 is pressed down, the first normally open contact KM101 and the second normally open contact KM102 of the rotating relay are closed, if the positioning rod is not at the position of the limit switch 9, the first normally closed contact KM81 and the second normally closed contact KM82 of the limit relay are closed, the motor 2 starts to rotate, when the positioning rod rotates to the limit position of the limit switch 9, the first normally closed contact KM81 and the second normally closed contact KM82 of the limit relay are opened, and the motor 2 stops rotating.
The above embodiment is merely an example of a control manner for controlling the insulating rotating arm 4 to rotate in the forward direction, such that the first movable contact 6-1 is electrically connected with the first fixed contact 5-1, and the second movable contact 6-2 is electrically connected with the second fixed contact 5-2; for the technical effect that the rotating arm 4 needs to be insulated to rotate reversely, so that the first movable contact 6-1 is electrically connected with the third fixed contact 5-3, and the second movable contact 6-2 is electrically connected with the fourth fixed contact 5-4, a second rotating relay group can be added according to the working principle of the rotating control relay group, so that the first pole of the motor 2 is electrically connected with the negative pole of a power supply, and the second pole is electrically connected with the positive pole of the power supply, thereby realizing the process of controlling the reverse rotation of the motor 2.
The lightning arrester direct current test wiring converter provided with the rotation control relay group and the limit switch 9 is simple to operate because a worker does not need to press the rotation switch SB1 when adjusting the electric connection process of the movable contact 6-1 and the fixed contact 5-1 and the movable contact 6-2 and the fixed contact 5-2, the motor 2 drives the movable contact 6-1 to rotate to the target fixed contact 5-1 and the movable contact 6-2 to rotate to the target fixed contact 5-2, and then the operation is stopped.
Further, the rotation control relay set further includes: the rotating group indicator light circuit is used for indicating the position of the insulating rotating arm 4, and the power switch SB2 is used for controlling the power supply to be turned on and off.
Specifically, the positive electrode of the power supply is electrically connected with the first end of a third normally-open contact KM83 of the limit relay, the second end of the third normally-open contact KM83 of the limit relay is electrically connected with the first end of an indicator light LED, and the second end of the indicator light LED is electrically connected with the negative electrode of the power supply.
The first end of the power switch SB2 is used as the positive electrode of the power supply, the second end of the power switch SB2 is electrically connected with the positive electrode of the battery, the negative electrode of the battery is used as the negative electrode of the power supply, the power switch SB2 is a self-locking switch, the contact is pressed to be closed for self-locking, and then the contact is pressed to be disconnected.
Before the lightning arrester direct current test wiring converter is used, the power switch SB2 is pressed, the lightning arrester direct current test wiring converter is in a ready state, and when the operation rotation control relay group rotates to a position limited by the limit switch 9, the indicator light LED lights up to indicate that the conversion is successful.
When the insulation rotating arm 4 rotates to the target position, the indicating lamp LED is turned on, so that an operator can know the current connection state at a glance, and when the operation state is not needed, the power switch SB2 is turned off, and the device damage caused by mistaken touch of an operator can be prevented.
The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the 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. The utility model provides an arrester direct current test wiring converter which characterized in that includes: the device comprises a body, a rotating group rotationally connected with the body and a wiring group fixedly connected with the body;
the rotating group is used for controlling the wiring group to form different electric connection forms; the body comprises an insulating plate (1);
the rotating group comprises: the insulation board is characterized by comprising a motor (2) fixedly connected with the insulation board (1), an insulation rotating shaft (3) rotatably connected with the insulation board (1) and an insulation rotating arm (4) fixedly connected with the insulation rotating shaft (3), wherein the motor (2) is in transmission connection with the insulation rotating shaft (3);
the wiring group includes: the insulating board comprises a fixed contact (5), a movable contact (6) and a wiring terminal (7), wherein the fixed contact (5) and the wiring terminal (7) are respectively and fixedly connected with the insulating board (1), and the movable contact (6) is fixedly connected with the insulating rotating arm (4).
2. A lightning arrester dc test wiring converter according to claim 1, characterized in that 0 said moving contact (6) is an elastic conducting strip.
3. The arrester dc test wiring converter of claim 2, wherein the wiring group further comprises: and the conducting wire (8) is a shielding wire, one end of the conducting wire (8) is electrically connected with the movable contact (6), and the other end of the conducting wire (8) is electrically connected with the wiring terminal (7).
4. A lightning arrester dc test wiring converter according to claim 3, characterized in that the rotating group further comprises a limit switch (9), the limit switch (9) being arranged on the insulating plate (1), the limit switch (9) being used for feeding back the rotation limit position of the insulating rotating arm (4).
5. The arrester dc test wiring converter of claim 4, wherein the rotating group further comprises: insulating bearing (10) and insulating bearing frame (11), insulating bearing frame (11) with insulation board (1) fixed connection, the outer lane of insulating bearing (10) with insulating bearing frame (11) fixed connection, insulating pivot (3) with the inner circle fixed connection of insulating bearing (10).
6. A lightning arrester DC test wiring converter according to claim 5, characterized in that the insulating tumbler (4) is provided with a hole, and the conductor wire (8) is arranged in the hole of the insulating tumbler (4).
7. The lightning arrester dc test wiring converter of claim 6, further comprising: the rotation control relay group is used for controlling the insulation rotating arm (4) to rotate to a position limited by the limit switch (9);
the rotation control relay set includes: the rotary relay and the limit relay are used for controlling the motor (2) to drive the insulating rotating arm (4) to rotate to the position limited by the limit switch (9).
8. The arrester dc test wiring converter of claim 7, wherein the rotary switch is a self-locking switch.
9. The lightning arrester dc test wiring converter of claim 8, wherein the rotation control relay set further comprises: and the rotating group indicator light circuit is used for indicating the position of the insulating rotating arm (4).
10. The lightning arrester dc test wiring converter of claim 9, wherein the rotation control relay set further comprises: and the power switch is used for controlling the opening and closing of the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010431309.1A CN111521847A (en) | 2020-05-20 | 2020-05-20 | Lightning arrester direct current test wiring converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010431309.1A CN111521847A (en) | 2020-05-20 | 2020-05-20 | Lightning arrester direct current test wiring converter |
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| CN111521847A true CN111521847A (en) | 2020-08-11 |
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| CN202010431309.1A Pending CN111521847A (en) | 2020-05-20 | 2020-05-20 | Lightning arrester direct current test wiring converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114675057A (en) * | 2022-03-28 | 2022-06-28 | 云南电网有限责任公司电力科学研究院 | Experimental termination |
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Application publication date: 20200811 |