CN113376550A - PT secondary voltage return circuit detection device - Google Patents
PT secondary voltage return circuit detection device Download PDFInfo
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- CN113376550A CN113376550A CN202110600316.4A CN202110600316A CN113376550A CN 113376550 A CN113376550 A CN 113376550A CN 202110600316 A CN202110600316 A CN 202110600316A CN 113376550 A CN113376550 A CN 113376550A
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000009434 installation Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000013024 troubleshooting Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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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
- G01R1/0416—Connectors, terminals
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
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Abstract
The invention discloses a PT secondary voltage loop detection device which comprises a fixed frame, wherein an arc plate is arranged on the fixed frame, a mounting frame is connected to the arc plate in a sliding mode, a fixing assembly for fixing the mounting frame is arranged between the arc plate and the mounting frame, an extension rod is connected to the mounting frame, the end part of the extension rod is horizontally connected with a round rod, a mounting plate is arranged at the other end of the round rod in a rotating mode, a balancing weight is arranged at the bottom of the mounting plate, when the mounting frame slides on the arc plate, the central axis of the round rod is invariable all the time, the position of the mounting plate is invariable all the time, and a signal transmitting device and a signal receiving device are arranged on the mounting plate.
Description
Technical Field
The invention relates to the technical field of PT secondary voltage loops, in particular to a PT secondary voltage loop detection device.
Background
The PT secondary voltage loop of the traditional transformer substation is led out by the PT secondary side (for the PT secondary loop of 220kV, a first group of protection voltage, a second protection voltage, a measurement voltage, a metering voltage and a zero sequence voltage are generally led out by 30 wire cores in total), the PT secondary leading-out wire passes through a PT terminal box transition group and then, a secondary loop cable inner core leads to a protection chamber voltage and is parallel to a screen. The voltage parallel screens are respectively led to the voltage switching devices of each interval. And after the transformation construction of the transformer substation is finished, the correctness of the PT voltage secondary circuit is checked. Problems which may occur in the process of the PT secondary circuit in the wiring process include wire core reversal, wire core short circuit (PT secondary forbidden short circuit), poor wire core contact and the like, if various circuit faults are not solved in time, PT can be burnt out after power is supplied, the secondary wire core can be burnt out, or a plug-in unit of a parallel or switching device can be burnt out.
The common loop fault detection method is that, for example, a universal meter is used for measuring on and off, or analog voltage is added to the secondary side of PT, and the potential is measured at each indoor node. The workload of multimeter measurement is large, and individual faults cannot be measured. The method of measuring the potential at each indoor node by adding an analog voltage to the secondary side of the PT is not ideal. On the one hand, the workload is also large, and on the other hand, if the short-circuit fault exists in the loop and the contacts of the parallel device re-acting relay are connected in series in the short-circuit loop, the contacts of the re-acting relay can be burnt out when the analog voltage is applied. Therefore, the method of adding the analog voltage loop to the PT secondary side has a certain risk.
The workload of the field actual test is large (assuming that 10 intervals of voltage are used in the transformer substation), loop inspection needs to be carried out at the PT secondary junction box, the PT terminal box, the voltage parallel screen and the 10-interval voltage switching screen, and the total inspection is carried out at 13 positions. If the connection mode is double bus connection and two sets of PT equipment are provided, the measurement quantity is doubled, namely 26 positions need to be checked. Usually, at least 15 cores are required to be checked in each position, so that the workload is quite large when the conventional mode is adopted for checking, and the checking can be finished after 2-3 days.
Disclosure of Invention
In view of the above, the present invention provides a PT secondary voltage loop detection device, which has high detection efficiency, saves labor, and effectively prevents a plug-in from being damaged, in view of the shortcomings of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a PT secondary voltage return circuit detection device, includes the mount, set up the arc on the mount, sliding connection mounting bracket on the arc, set up the fixed subassembly of fixed mounting bracket between arc and the mounting bracket, connect extension bar on the mounting bracket, extension bar tip horizontally connect round bar, the round bar other end rotates and sets up the mounting panel, mounting panel bottom installation balancing weight, when the mounting bracket slides on the arc, the axis of round bar is unchangeable all the time, the position of mounting panel is unchangeable all the time, install signal emission device or signal receiver on the mounting panel.
Further, cup joint the sleeve pipe on the round bar, the sleeve pipe other end rotates and connects the mounting panel, extension bar and round bar interpolation connect the flexible axle, flexible axle one end sets up star type handle, and the other end sets up the thread block, sleeve pipe threaded connection is on the thread block, set up the arch in the sleeve pipe, set up on the round bar and supply protruding gliding spout.
Furthermore, the signal transmitting device can transmit multiple paths of low-voltage and high-frequency signals simultaneously, and the signal receiving device is provided with multiple receiving terminals and can respectively receive the multiple paths of signals transmitted by the signal transmitting device.
Further, the mount bottom surface sets up the universal wheel, set up jack one on the mount, the mount both sides set up the hollow tube, peg graft slide bar and lower slide bar in the hollow tube, set up the lever between upper slide bar and the lower slide bar, the lever middle part is rotated and is set up in the hollow tube, set up diaphragm one between the upper slide bar top, jack one sets up under diaphragm one, set up diaphragm two between the lower slide bar bottom, when jack one rises, diaphragm two moves down and pastes tight ground, when jack one reduces, diaphragm two moves up and leaves ground.
Furthermore, a transverse plate IV is arranged between the two ends of the arc-shaped plate, a signal receiving device is arranged, a display screen and a single chip microcomputer are arranged on the transverse plate IV, the signal receiving device is electrically connected with the input end of the single chip microcomputer, and the display screen is electrically connected with the output end of the single chip microcomputer.
Furthermore, an inserted bar is vertically inserted into the fixed frame, a second jack is statically connected to the fixed frame, the top of the second jack is in contact with the inserted bar, and the top of the inserted bar is statically connected with the arc-shaped plate.
The invention has the beneficial effects that:
1. the invention provides a PT secondary voltage loop detection device.A signal transmitting device and a signal receiving device are arranged on a mounting plate 6, and whether a corresponding loop is correct or not can be obtained by judging the frequency received by the signal receiving device for analysis, so that various problems of the loop can be tested at one time, such as open circuit of any plurality of cores, reverse circuit phenomenon of any plurality of cores, short circuit phenomenon among loops of any plurality of cores and the like. These trouble spots, if inspected by the multimeter zone, may take a long time to troubleshoot, and require an experienced master to troubleshoot the trouble. But utilize this device can once only various defects of visual inspection department, and the master and the slave that experience is not abundant can also confirm the concrete position of trouble easily, can save troubleshooting time and reduce the degree of difficulty of troubleshooting to a great extent.
2. When the depth of the PT cabinet is larger, the mounting frame can be rotated to enable the mounting frame to slide along the arc plate and then be fixed, the star-shaped handle can also be twisted, the sleeve pipe moves forwards along the round rod under the action of the thread block, the mounting plate is enabled to go deep into the PT cabinet and is located at a proper measuring point position, the use is flexible, and the practicability of the invention is improved.
3. The signal transmitting device can transmit a plurality of groups of low-voltage and high-frequency signals simultaneously. The purpose of the low voltage is to avoid that when the voltage loop has a short-circuit fault and the contacts of the parallel device re-acting relay are connected in series in the short-circuit loop, a large short-circuit current still cannot be generated, so that the contacts of the re-acting relay cannot be burnt out. The high frequency is used as the signal acquisition quantity, the frequency of the multi-path signals is 1 to 20kHZ respectively, and thus low-voltage high-frequency signals with different frequencies are transmitted inside each wire core. The subsequent voltage loops transmit the signals, and the cables are shielded cables, so that the interference of external high-frequency signals is avoided. And the high-frequency signal adopts the kHZ level mainly in order to avoid 50HZ power frequency interference. The signal receiving device is provided with a plurality of receiving terminals which can respectively receive a plurality of signals, each terminal receives the signal and then transmits the signal to the singlechip 26 for analysis, the frequency is displayed on the display screen 25 after the analysis, and a worker judges whether the wiring of the signal is correct or not according to the received frequency condition.
4. In order to increase the fixing firmness of the fixing frame, a transverse plate II is additionally arranged below the fixing frame, and when the jack I is lifted, the transverse plate II is in close contact with the ground, so that the friction force between the fixing frame and the ground is increased, and the fixing frame is effectively prevented from moving randomly in the measuring process; when the measurement is finished, the first jack is shortened, the second transverse plate moves upwards, and the fixing frame can be conveniently pushed.
5. The second jack is extended/shortened, the inserted link moves up/down, the arc plate moves up/down, and the mounting plate is lifted/lowered, so that the measuring height range of the device is enlarged, and the practicability is stronger.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural view of an arc plate and a mounting bracket;
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 4 is a schematic view of the connection between the inserted link, the second jack and the fixing frame;
FIG. 5 is a schematic structural view of a flexible shaft and a connecting assembly thereof;
FIG. 6 is a schematic view of the connection structure of the round bar and the sleeve;
FIG. 7 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a first jack and a connecting assembly thereof;
wherein, 1-a fixed frame, 2-an arc plate, 3-a mounting frame, 4-an extension bar, 5-a round bar, 6-a mounting plate, 7-a balancing weight, 8-a signal transmitting device, 9-a signal receiving device, 10-a sleeve, 11-a flexible shaft, 12-a star handle, 13-a thread block, 14-a bulge, 15-a chute, 16-a universal wheel, 17-a jack I, 18-a hollow tube, 19-an upper sliding bar, 20-a lower sliding bar, 21-a lever, 23-a transverse plate I, 24-a transverse plate II, 25-a display screen, 26-a singlechip, 27-an inserted bar, 28-a jack II, 29-a bottom plate, 30-a vertical bar I, 31-a diagonal bar, 32-a bolt and 33-a vertical bar II, 34-transverse plate three, 35-rotating shaft, 36-transverse plate four.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1-2, which is a first embodiment of the present invention, a PT secondary voltage loop detection device includes a fixing frame 1 as shown in fig. 1, where the fixing frame 1 includes a bottom plate 29, a first vertical rod 30 is vertically disposed above the bottom plate 29, four inclined rods 31 are symmetrically disposed on an outer peripheral surface of the first vertical rod 30, and the inclined rods 31 are welded on the bottom plate 29; an arc-shaped plate 2 is welded on the top of a first vertical rod 30, the arc-shaped plate 2 is in a semi-circular arc shape, an installation frame 3 is connected onto the arc-shaped plate 2 in a sliding mode, the structure of the installation frame 3 is shown in figure 2 and comprises a sliding block and a cylinder which is obliquely bonded on the sliding block, sliding grooves 15 are formed in two sides of the arc-shaped plate 2, protrusions 14 which are clamped with the sliding grooves 15 are formed in the sliding block, the protrusions 14 are clamped in the sliding grooves 15, and under the action of the protrusions 14 and the sliding grooves 15, the installation frame 3 slides along the arc-shaped plate 2; a fixing component for fixing the mounting frame 3 is arranged between the arc-shaped plate 2 and the mounting frame 3, the fixing component is a bolt 32, a screw hole is processed on the mounting frame 3, the bolt 32 is in threaded connection with the screw hole, the end surface of a stud of the bolt 32 is in contact with the arc-shaped plate 2, and the mounting frame 3 can be fixed by screwing the bolt 32; an extension bar 4 is inserted into the cylinder and is fixedly adhered, the end part of the extension bar 4 positioned at the upper part is horizontally adhered with a round bar 5, and the central axis of the round bar 5 and the central axis of the arc-shaped plate 2 are positioned on the same straight line; the other end of the round rod 5 is bonded with a bearing, the mounting plate 6 is of a cuboid plate-shaped structure, the mounting plate 6 is provided with a signal transmitting device 8 or a signal receiving device 9, a blind hole matched with the bearing is processed on the mounting plate 6, the bearing is bonded in the blind hole, and the mounting plate 6 is rotatably connected with the round rod 5; the bottom of the mounting plate 6 is bonded with a balancing weight 7, the weight of the balancing weight 7 is larger than that of the whole mounting plate 6, when the mounting frame 3 slides on the arc-shaped plate 2, the central axis of the round rod 5 is invariable all the time, and when the round rod 5 rotates, the mounting plate 6 is kept still under the action of the balancing weight 7;
integrative forming diaphragm four 36 between 2 both ends of arc, install display screen 25 and singlechip 26 on the diaphragm four 36 of installation signal receiver 9, signal transmitter 8 and the input of singlechip 26 of signal receiver 9 electricity connection, the output of singlechip 26 is connected to display screen 25 electricity, signal transmitter 8 can 20 groups low pressure of simultaneous transmission, the signal of high frequency, the receiving device has 20 way receiving terminals, can accept 20 way signals respectively, reach singlechip 26 behind every terminal received signal and resolve, the frequency shows on display screen 25 after the resolution.
The implementation manner of the embodiment is as follows:
if the PT cabinet is deep, the mounting frame 3 can slide on the arc plate 2, then a bolt 32 is screwed down, the mounting frame 3 is fixed on the arc plate 2, at this time, the extension bar 4 and the round rod 5 can both extend into the PT cabinet, the signal transmitting device 8 and the signal receiving device 9 are just opposite to a PT secondary loop, the signal generating device transmits 20 paths of low-voltage and high-frequency signals, the signal receiving device 9 receives each path of signal and then transmits the signals to the single chip microcomputer 26 for frequency analysis, the display screen 25 displays the frequency of each path of signal, and a worker judges whether the wiring of the path of signal is correct according to the received frequency condition:
1. if the frequencies of the signals received by the receiving terminals of the receiving devices 1 to 20 are respectively as follows: and if the 1 path only receives 1kHZ, the 2 path only receives 2kHZ, … … and the 20 path only receives 20kHZ, the faults that the checked loop is correct, no contact failure exists, the loop is short-circuited and the loop is reversed are indicated.
2. If a certain path of the receiving device does not receive the high-frequency signal, the possibility that the loop is loosened, broken or mistakenly connected exists in the path, and a worker is guided to conduct targeted inspection on the wire core.
3. If a certain path of the receiving device receives 2-frequency high-frequency signals at the same time, for example, the receiving terminal 8 receives 8kHZ and 9kHZ high-frequency signals at the same time, it indicates that a loop short circuit phenomenon exists at a certain position for the 8-path wire core and the 9-path wire core, and a worker can specifically perform loop short circuit fault troubleshooting on the 8-path wire core and the 9-path wire core.
4. If the receiving device has two paths of high-frequency signals which simultaneously receive 2 frequencies and are reversed, for example, the receiving terminal 8 receives a 9kHZ signal and the receiving terminal 9 receives an 8kHZ signal, it indicates that loop reversal phenomena exist at a certain position for the 8-path wire core and the 9-path wire core, and a worker can specifically perform loop reversal fault troubleshooting on the 8-path wire core and the 9-path wire core.
Example two
As shown in fig. 3-6, a second embodiment of the present invention is different from the first embodiment in that a sleeve 10 with an opening at one end is sleeved on a round rod 5, the non-opening end of the sleeve 10 is rotatably connected to an installation plate 6, and the connection manner of the sleeve 10 and the installation plate 6 is the same as the connection manner between the round rod 5 and the installation plate 6, which is not described herein again; as shown in fig. 5 and 6, the extension bar 4 and the round bar 5 are both hollow tubes 18, and have communicated channels inside, the flexible shaft 11 is inserted in the channels, one end of the flexible shaft 11 is welded with the star-shaped handle 12, the other end is welded with the screw block 13, the star-shaped handle 12 is rotated, and the screw block 13 rotates along with the flexible shaft 11; an internal thread matched with the thread of the thread block 13 is processed in the sleeve 10, and the sleeve 10 is connected to the thread block 13 in a threaded manner; the inside symmetry of sleeve 10 opening one end sets up protruding 14, sets up on the pipe and supplies protruding 14 gliding spout 15, and screw block 13 is rotatory, and drive sleeve 10 antedisplacement, and when the T cabinet degree of depth is great, twist and move star type handle 12, sleeve 10 antedisplacement along round bar 5 under screw block 13's effect, make mounting panel 6 go deep into the PT cabinet, be located suitable measuring point position, need not to remove mounting bracket 3.
As shown in fig. 4, the first vertical rod 30 is a hollow structure, the inserting rod 27 is vertically inserted into the first vertical rod 30, the second vertical rod 33 is vertically arranged on each of the four inclined rods 31, the third transverse plate 34 is welded on the bottom surface of the second vertical rod 33, the second jack 28 is installed on the third transverse plate 34, the top surface of the second jack 28 is in contact with the inserting rod 27, the top of the inserting rod 27 is fixedly connected with the arc-shaped plate 2, the second jack 28 is lifted at the moment, the inserting rod 27 is lifted, the arc-shaped plate 2 is driven to lift, and the measuring range of the device in the vertical direction is enlarged.
EXAMPLE III
Referring to fig. 7-8, a third embodiment of the present invention is shown, which is different from the first embodiment in that, as shown in fig. 7, a first jack 17 is fixedly installed on a bottom plate 29, cleaning holes are formed on both sides of the bottom plate 29, a hollow tube 18 is welded in the cleaning holes, an upper sliding rod 19 and a lower sliding rod 20 are inserted in the hollow tube 18, as shown in fig. 8, a lever 21 is arranged between the upper sliding rod 19 and the lower sliding rod 20, both ends of the lever 21 are rotatably connected with the upper sliding rod 19 and the lower sliding rod 20, respectively, the lever 21 can also slide on the upper sliding rod 19 and the lower sliding rod 20, a rotating shaft 35 is inserted in the middle of the lever 21, both ends of the rotating shaft 35 are horizontally welded in the hollow tube 18, a first transverse plate 23 is adhered between the tops of the upper sliding rod 19, the first jack 17 is arranged right below the first transverse plate 23, a second transverse plate 24 is adhered between the bottoms of the lower sliding rod 20, when the first jack 17 rises, the upper sliding rod 19 rises, under the action of the lever 21, the transverse plate II 24 moves downwards to be tightly attached to the ground, so that the friction force between the fixing frame 1 and the ground is increased, the fixing frame 1 cannot easily move, the stability is increased, and the lever 21 is in an inclined state at the moment, so that the first jack 17 is prevented from being incapable of retracting; when the first jack 17 is shortened, the upper sliding rod 19 moves downwards, and under the action of the lever, the second transverse plate 24 moves upwards to leave the ground, and at the moment, the fixed frame 1 can be freely pushed.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A PT secondary voltage loop detection device is characterized by comprising a fixed frame (1), the fixing frame (1) is provided with an arc-shaped plate (2), the arc-shaped plate (2) is connected with a mounting frame (3) in a sliding way, a fixing component for fixing the mounting rack (3) is arranged between the arc-shaped plate (2) and the mounting rack (3), an extension bar (4) is connected on the mounting rack (3), the end part of the extension bar (4) is horizontally connected with a round bar (5), the other end of the round bar (5) is rotatably provided with a mounting plate (6), the bottom of the mounting plate (6) is provided with a balancing weight (7), when the mounting rack (3) slides on the arc-shaped plate (2), the central axis of the round rod (5) is invariable all the time, the position of mounting panel (6) is unchangeable all the time, install signal emission device (8) or signal receiver (9) on mounting panel (6).
2. The PT secondary voltage loop detection device of claim 1, wherein a sleeve (10) is sleeved on the round rod (5), the other end of the sleeve (10) is rotatably connected with the mounting plate (6), a flexible shaft (11) is inserted in the extension bar (4) and the round rod (5), one end of the flexible shaft (11) is provided with a star-shaped handle (12), the other end of the flexible shaft is provided with a thread block (13), the sleeve (10) is in threaded connection with the thread block (13), a protrusion (14) is arranged in the sleeve (10), and a sliding groove (15) for the protrusion (14) to slide is arranged on the round rod (5).
3. The PT secondary voltage loop detection device of claim 1, wherein the signal emitting device (8) is capable of emitting multiple low-voltage and high-frequency signals simultaneously, and the signal receiving device (9) has multiple receiving terminals capable of receiving multiple signals emitted by the signal emitting device (8).
4. The PT secondary voltage loop detection device according to claim 1, wherein universal wheels (16) are arranged on the bottom surface of the fixing frame (1), a first jack (17) is arranged on the fixing frame (1), hollow tubes (18) are arranged on two sides of the fixing frame (1), an upper sliding rod (19) and a lower sliding rod (20) are inserted into the hollow tubes (18), a lever (21) is arranged between the upper sliding rod (19) and the lower sliding rod (20), the middle part of the lever (21) is rotatably arranged in the hollow tubes (18), a first transverse plate (23) is arranged between the tops of the upper sliding rod (19), the first jack (17) is arranged under the first transverse plate (23), a second transverse plate (24) is arranged between the bottoms of the lower sliding rod (20), and when the first jack (17) is lifted, the second transverse plate (24) is downwards attached to the ground, when the first jack (17) is lowered, the second transverse plate (24) moves upwards to leave the ground.
5. The PT secondary voltage loop detection device according to claim 1, wherein a transverse plate four (36) is arranged between two ends of the arc-shaped plate (2), a display screen (25) and a single chip microcomputer (26) are arranged on the transverse plate four (36) provided with the signal receiving device (9), the signal receiving device (9) is electrically connected with an input end of the single chip microcomputer (26), and the display screen (25) is electrically connected with an output end of the single chip microcomputer (26).
6. The PT secondary voltage loop detection device of claim 1, wherein an insert rod (27) is vertically inserted into the fixing frame (1), a second jack (28) is statically connected to the fixing frame (1), the top of the second jack (28) is in contact with the insert rod (27), and the top of the insert rod (27) is statically connected with the arc-shaped plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110600316.4A CN113376550A (en) | 2021-05-31 | 2021-05-31 | PT secondary voltage return circuit detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110600316.4A CN113376550A (en) | 2021-05-31 | 2021-05-31 | PT secondary voltage return circuit detection device |
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| CN113376550A true CN113376550A (en) | 2021-09-10 |
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| CN206193094U (en) * | 2016-11-29 | 2017-05-24 | 国网四川省电力公司电力科学研究院 | Current transformer secondary circuit monitoring module , specially become acquisition terminal |
| CN107443355A (en) * | 2017-08-04 | 2017-12-08 | 国网山东省电力公司电力科学研究院 | A kind of mechanical arm and control method for partial discharge of switchgear detection |
| CN207675920U (en) * | 2017-11-22 | 2018-07-31 | 国网内蒙古东部电力有限公司电力科学研究院 | A kind of voltage transformer error experiment auxiliary safety holder |
| CN210323339U (en) * | 2019-04-15 | 2020-04-14 | 广州供电局有限公司 | Secondary circuit tester |
| CN210720513U (en) * | 2019-06-17 | 2020-06-09 | 天津鸿润通汇科技有限公司 | Signal transmitter capable of being adjusted at multiple angles |
| CN110850334A (en) * | 2019-11-28 | 2020-02-28 | 国网福建省电力有限公司龙岩供电公司 | Nondestructive testing method and device for CT secondary circuit state |
| CN213181381U (en) * | 2020-07-09 | 2021-05-11 | 江西中昌工程咨询监理有限公司 | Tunnel wall body firmness check out test set |
| CN213275920U (en) * | 2020-08-04 | 2021-05-25 | 云南电网有限责任公司红河供电局 | Portable measurement secondary circuit line inspection device |
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Application publication date: 20210910 |