CN111952924A - Current leading-out device of resting cable, installation method and anti-theft alarm system - Google Patents
Current leading-out device of resting cable, installation method and anti-theft alarm system Download PDFInfo
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- CN111952924A CN111952924A CN202010918591.6A CN202010918591A CN111952924A CN 111952924 A CN111952924 A CN 111952924A CN 202010918591 A CN202010918591 A CN 202010918591A CN 111952924 A CN111952924 A CN 111952924A
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- 230000000284 resting effect Effects 0.000 title abstract description 12
- 238000009434 installation Methods 0.000 title abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 152
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 239000010410 layer Substances 0.000 claims description 15
- 239000011241 protective layer Substances 0.000 claims description 13
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 3
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- 239000004020 conductor Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
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- 239000011425 bamboo Substances 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 230000002265 prevention Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
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- 238000012806 monitoring device Methods 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
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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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
- H01R13/5205—Sealing means between cable and housing, e.g. grommet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/04—Cable-end sealings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention relates to a current leading-out device, an installation method and an anti-theft alarm system of a resting cable, which are used for detecting a current signal of a detected resting cable, wherein the current leading-out device is used for connecting a cable head of the detected resting cable, the current leading-out device comprises a sealing cap, a sealing cap connector, a conductive pile and a lead, the cable head comprises a sealing cap part and an outer protection part, and the outer protection layer of the detected resting cable is removed from the sealing cap part; sealed cap is the cylinder section of thick bamboo structure, and inside is formed with and seals cap portion size assorted room of holding for hold the cap portion, electrically conductive stake be located hold indoorly, be used for connecting the sinle silk, and connect out through the wire, the bottom of sealed cap is equipped with walks the line hole, sealed cap connector fixed connection sealed cap, sealed cap connector is equipped with the wiring end, the wire is through walking the line hole access wiring end. Compared with the prior art, the invention realizes the sealing of the conductive pile through the multilayer waterproof design, has the waterproof effect, can stably collect the circulation signals and ensures the reliability of the anti-theft monitoring of the cable.
Description
Technical Field
The invention relates to the field of cable theft prevention, in particular to a current leading-out device of a resting cable, an installation method and a theft prevention alarm system.
Background
The extra-high voltage shutdown cable is a power cable of 110kV or higher voltage class which is in a shutdown state for a long time but is partially used or fully used in the future for a certain period of time. Since such cables are in a state of being out of service for a long time, once stolen, they are difficult to be discovered in a short time. Like ordinary cables, the ultrahigh-voltage cable-stopping cores (601) are mainly made of metal copper, and due to the fact that copper price rises, the ultrahigh-voltage cable-stopping cores have more copper content, and stealing incidents aiming at the ultrahigh-voltage cable-stopping cores are increased continuously. The stolen ultrahigh-voltage stop cable not only causes direct economic loss of a power enterprise, but also causes part of construction project delay construction period, thereby generating indirect economic loss.
The invention with the publication number of CN108918949A discloses an ultrahigh voltage resting cable technical prevention monitoring system and method based on a circulating current monitoring method, the system comprises an intelligent current monitoring device, a power supply, a cloud monitoring center and a mobile terminal, one end of three phases of a resting cable is respectively conducted, the other end of the three phases of the resting cable is connected with the intelligent current monitoring device and the power supply to form a circulating current detection loop, and the intelligent current monitoring device is connected with the mobile terminal through the cloud monitoring center.
The ultrahigh-voltage resting cable technical prevention monitoring system judges whether the cable is stolen or not by detecting a circulating current signal of the cable; but only discloses a system scheme and does not disclose the detail of collecting the circulating current signal of the cable.
The collection of cable current conversion signals needs to ensure stable and reliable connection between devices, and has a waterproof function so as to stably collect circulating current signals and ensure the reliability of monitoring.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a current leading-out device, a mounting method and an anti-theft alarm system of a stop cable, which are stable and reliable in connection and have a waterproof function.
The purpose of the invention can be realized by the following technical scheme:
a current leading-out device of a rest cable is used for detecting a current signal of a detected rest cable, the current leading-out device is used for being connected with a cable head of the detected rest cable, the current leading-out device comprises a sealing cap, a sealing cap connector, a conductive pile and a lead, the cable head comprises a sealing cap part and an outer protection part, the sealing cap part comprises a wire core, an insulating layer and a grounding protective layer, and the outer protection part comprises the wire core, the insulating layer, the grounding protective layer and an outer protective layer;
the sealing cap is of a cylindrical structure, a containing chamber matched with the size of the sealing cap part is formed inside the sealing cap and used for containing the sealing cap part, the conductive piles are located in the containing chamber and used for connecting the wire cores and leading out the wires, wire routing holes are formed in the bottom of the sealing cap, the sealing cap connector is fixedly connected with the sealing cap and provided with wiring ends, and the wires are connected into the wiring ends through the wire routing holes.
Further, the sealing cap is connected with the grounding sheath through a lead seal.
Furthermore, a first sealing ring is arranged in the wire feeding hole and used for achieving sealing connection of the wire and the wire feeding hole.
Furthermore, a second sealing ring is arranged at the joint of the sealing cap and the sealing cap connector.
Furthermore, a third sealing ring is arranged in the wiring end and used for realizing the sealing connection of the lead and the wiring end.
Further, the bottom of sealing cap is equipped with a plurality of first bolt holes, the sealing cap connector correspondence is equipped with a plurality of second bolt holes, the sealing cap connector passes through fixing bolt in proper order, process second bolt hole and first bolt hole, fixed connection sealing cap.
Further, the sealing cap is made of 6061 alloy material.
Further, the sealing cap connector is made of nylon materials.
Further, the wire is a silica gel insulated wire.
The invention also provides an installation method of the current leading-out device of the resting cable, which comprises the following steps:
s1: cutting off part of the outer protection layer at the end of the detected pause cable to form a cap sealing part and an outer protection part;
s2: inserting the conductive pile into the wire core, connecting the exposed end of the conductive pile with a lead, and leading out from the wiring hole;
s3: mounting the sealing cap on the cap part, and carrying out lead sealing treatment on a seam between the sealing cap and the grounding protection layer;
s4: and after the lead sealing treatment is cooled, connecting the lead led out in the step S2 to the wiring end of the sealing cap connector, and fixing the sealing cap connector on the sealing cap.
The invention also provides an intelligent anti-theft alarm system for a rest cable, which adopts the current leading-out device for the rest cable, and comprises intelligent current monitoring equipment and alarm equipment, wherein the rest cable comprises an A wire, a B wire and a C wire, the current leading-out devices for the rest cable as claimed in claim 1 are arranged at two ends of the A wire, the B wire and the C wire, the tail ends of the A wire, the B wire and the C wire are mutually connected to realize three-phase short circuit, the head ends of the A wire, the B wire and the C wire are respectively and correspondingly connected with the A-phase, B-phase and C-phase connection ends of the intelligent current monitoring equipment, and the intelligent current monitoring equipment is connected with the alarm equipment.
Compared with the prior art, the invention has the following advantages:
(1) the current leading-out device is connected with the wire core through the conductive pile to detect a circulating current signal, and the conductive pile and a lead thereof are reliably fixed through the sealing cap and the sealing cap connector; the multi-layer design is adopted, and the conducting wire extends out only through the arranged wiring hole and the wiring terminal, so that the sealing of the conducting pile is realized, the waterproof effect is achieved, and the stable and reliable collection of the circulating current signals can be ensured.
(2) The current leading-out device disclosed by the invention has the advantages that in order to enhance the self waterproof function, the joint of the sealing cap and the grounding protective layer is subjected to lead sealing treatment, the first sealing ring is arranged in the wiring hole, the second sealing ring is arranged at the joint of the sealing cap and the sealing cap connector, the third sealing ring is arranged in the wiring end, and the sealing cap connector are connected through a plurality of bolts, so that the multilayer waterproof function is achieved.
(3) Based on the current leading-out device, the intelligent anti-theft alarm system is constructed, the micro-current is used for monitoring the cable, external power supply is not needed, micro-current signals can be stably collected, and the reliability of the intelligent anti-theft alarm system is ensured.
Drawings
Fig. 1 is a schematic view of the installation of a current lead-through for a rest cable according to the invention;
FIG. 2 is a schematic structural view of the sealing cap;
FIG. 3 is a left side view of the sealing cap;
FIG. 4 is a left side view of the closure connector;
FIG. 5 is a cross-sectional view of the closure connector;
in the figure, 1, a sealing cap, 101, a wiring hole, 102, a first sealing ring, 103, a first bolt hole, 2, a sealing cap connector, 201, a terminal, 202, a second sealing ring, 203, a third sealing ring, 204, a second bolt hole, 205, a second sealing ring groove, 206, a fixing bolt, 3, a conductive pile, 4, a lead, 5, a lead sealing treatment object, 6, a tested stop cable, 601, a wire core, 602, an insulating layer, 603, a grounding protective layer, 604 and an outer protective layer.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1, the present embodiment provides a current leading-out device of a pause cable, which is used for detecting a current signal of a detected pause cable 6, the current leading-out device is connected to a cable head of the detected pause cable 6, the current leading-out device includes a sealing cap 1, a sealing cap connector 2, a conductive pile 3 and a conducting wire 4, the sealing cap 1 and the sealing cap connector 2 form a special connection sealing cap of the current leading-out device of the present embodiment, the special connection sealing cap has the functions of connecting a cable core and a main device and waterproofing a cable head, and an IP68 waterproofing design is adopted.
The cable head comprises a cap sealing part and an outer protecting part, wherein the cap sealing part comprises a wire core 601, an insulating layer 602 and a grounding protective layer 603, and the outer protecting part comprises the wire core 601, the insulating layer 602, the grounding protective layer 603 and an outer protecting layer 604;
sealing cap 1 is the cylinder section of thick bamboo structure, and inside is formed with and seals cap portion size assorted room of holding for hold the cap portion, conductive pile 3 is located and holds indoorly, is used for connecting sinle silk 601, and connects out through wire 4, and the bottom of sealing cap 1 is equipped with wire hole 101, sealing cap connector 2 fixed connection sealing cap 1, and sealing cap connector 2 is equipped with wiring end 201, and wire 4 inserts wiring end 201 through walking wire hole 101.
The components of the device and the method of installation are described in detail below.
1. Sealing cap
As shown in fig. 2 and 3, the sealing cap is an aluminum sealing cap, and is made of 6061 alloy material by CNC lathe processing, and the inner diameter of the sealing cap needs to be consistent with the diameter of the cable metal sheath.
The sealing cap 1 is connected to the ground protection layer 603 by lead sealing, and after the lead sealing, a lead sealing treatment substance 5 is formed between the sealing cap 1 and the ground protection layer 603.
The bottom of the sealing cap 1 is provided with a plurality of first bolt holes 103, and a first sealing ring 102 is arranged in the wire feeding hole 101 and used for realizing the sealing connection between the wire 4 and the wire feeding hole 101. The wire 4 is a silica gel insulated wire.
2. Sealing cap connector 2
As shown in fig. 4 and 5, the cap connector 2 is made of nylon material by CNC lathe machining, and its diameter, hole position, etc. are corresponding to the special aluminum cap.
A second sealing ring 202 is arranged at the joint of the sealing cap 1 and the sealing cap connector 2. The cap connector 2 is correspondingly provided with a second seal ring groove 205 for accommodating the second seal ring 202.
A third sealing ring 203 is arranged in the terminal 201 and is used for realizing the sealing connection between the lead 4 and the terminal 201.
The bottom of sealing cap 1 is equipped with a plurality of first bolt holes 103, and sealing cap connector 2 corresponds and is equipped with a plurality of second bolt holes 204, and sealing cap connector 2 passes through fixing bolt 206 in proper order, through second bolt hole 204 and first bolt hole 103, fixed connection sealing cap 1. In the present embodiment, the number of first bolt holes 103 and second bolt holes 204 is six.
The two ends of the middle part of the sealing cap connector 2 are concave to form a groove, the middle part is connected by a connecting plate to form a wiring terminal 201, and the wiring terminal 201 is provided with a through hole for connecting a lead 4.
3. Mounting method
The method for mounting the current leading-out device of the pause cable comprises the following steps:
s1: cutting off part of the outer sheath 604 at the end of the detected pause cable 6 to form a cap part and an outer sheath;
s2: inserting the conductive pile 3 into the wire core 601, connecting the exposed end of the conductive pile 3 with a wire 4, and leading out from the wire routing hole 101;
s3: mounting the sealing cap 1 on a cap sealing part, and carrying out lead sealing treatment on a seam between the sealing cap 1 and the grounding protection layer 603;
s4: after the lead sealing treatment is cooled, the lead wire 4 led out in step S2 is connected to the terminal 201 of the cap connector 2, and the cap connector 2 is fixed to the sealing cap 1.
The embodiment also provides an intelligent anti-theft alarm system for the rest cable adopting the current leading-out device for the rest cable, which comprises intelligent current monitoring equipment and alarm equipment, wherein the rest cable comprises an A wire, a B wire and a C wire, the current leading-out device for the rest cable as claimed in claim 1 is arranged at two ends of the A wire, the B wire and the C wire, the tail ends of the A wire, the B wire and the C wire are connected with each other to realize three-phase short circuit, the head ends of the A wire, the B wire and the C wire are respectively and correspondingly connected with the A-phase wiring end, the B-phase wiring end and the C-phase wiring end of the intelligent current monitoring equipment, and the intelligent current monitoring equipment is connected with the alarm equipment.
The intelligent anti-theft alarm system monitors the cable by using micro-current without external power supply, and has the advantages of simple structure, convenient construction and the like.
The intelligent anti-theft alarm system for the shutdown cable can be installed under the line working conditions of two-end sealing caps, GIS two-end access and two-end sealing caps (no transposition/grounding box).
Taking a circuit with two end sealing caps (no transposition/grounding box) as an example, the installation steps are as follows:
1) removing insulating sheaths (namely outer sheaths) at two ends of the cable to expose a 30-40 cm aluminum shell grounding sheath (namely a grounding sheath);
2) inserting a conductive pile into a wire core of the cable head, connecting the exposed end of the conductive pile with a silica gel insulated wire and leading out from a wire hole of the aluminum sealing cap;
3) and then the aluminum sealing cap is arranged on the cable head, and lead sealing treatment is carried out at the joint of the aluminum sealing cap and the aluminum shell grounding protective layer. The lead sealing treatment must meet the technical requirements of the lead sealing process, so that the aluminum sealing cap is ensured to be fixed and the waterproof performance of the cable is achieved;
4) after the lead sealing is cooled, the lead is connected to the wiring end of the sealing cap connector, and the sealing cap connector is fixed on the aluminum sealing cap by using a bolt;
(in the whole installation process of the cable head, sealing rings are required to be installed on a wiring hole of the aluminum sealing cap, a joint of the aluminum sealing cap and the sealing cap connector and a wiring end of the sealing cap connector so as to achieve the multilayer waterproof effect.)
5) After the cable heads are completely installed, connecting the wiring ends of the three sealing cap connectors at the far ends by short-circuit wires to ensure that the three phases of the cable are short-circuited;
6) the wiring terminals of the three sealing cap connectors at the near end are respectively connected with the wiring terminals of the phase A, the phase B and the phase C of the main equipment (namely intelligent current monitoring equipment);
7) and pulling out the engineering activating plug on the main equipment to start the hardware of the alarm system.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A current leading-out device of a rest cable is used for detecting a current signal of a detected rest cable (6), and is connected with a cable head of the detected rest cable (6), and is characterized in that the current leading-out device comprises a sealing cap (1), a sealing cap connector (2), a conductive pile (3) and a lead (4), the cable head comprises a sealing cap part and an outer protection part, the sealing cap part comprises a wire core (601), an insulating layer (602) and a grounding protective layer (603), and the outer protective part comprises a wire core (601), an insulating layer (602), a grounding protective layer (603) and an outer protective layer (604);
sealing cap (1) is the cylinder barrel structure, inside be formed with sealing cap portion size assorted holds the room, is used for holding sealing cap portion, conducting pile (3) are located hold indoor, are used for connecting sinle silk (601), and pass through wire (4) connect out, sealing cap connector (2) fixed connection sealing cap (1), sealing cap connector (2) are equipped with wiring end (201), the bottom of sealing cap (1) is equipped with walks line hole (101), wire (4) are passed through walk line hole (101) and insert wiring end (201).
2. A current lead-out arrangement of a rest cable according to claim 1, characterized in that the sealing cap (1) is connected to the grounding sheath (603) by lead sealing.
3. A current lead-out device of a rest cable according to claim 1, characterized in that a first sealing ring (102) is arranged in the wire hole (101) for sealing connection of the lead wire (4) with the wire hole (101).
4. A current lead-out arrangement of a rest cable according to claim 1, characterized in that the connection of the sealing cap (1) and the cap connector (2) is provided with a second sealing ring (202).
5. A current lead-out device of a rest cable according to claim 1, characterized in that a third sealing ring (203) is arranged in the terminal (201) for sealing connection of the conductor (4) to the terminal (201).
6. The current leading-out device of a rest cable according to claim 1, characterized in that the bottom of the sealing cap (1) is provided with a plurality of first bolt holes (103), the sealing cap connector (2) is correspondingly provided with a plurality of second bolt holes (204), and the sealing cap connector (2) is fixedly connected with the sealing cap (1) through fixing bolts (206) passing through the second bolt holes (204) and the first bolt holes (103) in sequence.
7. A current lead-out arrangement of a rest cable according to claim 1, characterized in that the sealing cap (1) is made of 6061 alloy material.
8. A current lead-out arrangement of a rest cable according to claim 1, characterized in that the cap connector (2) is of nylon material.
9. A method of mounting a current lead-out device of a rest cable according to claim 2, comprising the steps of:
s1: cutting off part of the outer protective layer (604) at the end of the tested pause cable (6) to form a cap part and an outer protective part;
s2: inserting the conductive pile (3) into the wire core (601), connecting the exposed ends of the conductive pile (3) by using a lead (4), and leading out from the wiring hole (101);
s3: mounting the sealing cap (1) on the cap part, and carrying out lead sealing treatment on a joint of the sealing cap (1) and the grounding protection layer (603);
s4: and after the lead sealing treatment is cooled, connecting the lead (4) led out in the step S2 to a terminal (201) of the sealing cap connector (2), and fixing the sealing cap connector (2) on the sealing cap (1).
10. An intelligent anti-theft alarm system for a rest cable adopting the current leading-out device of the rest cable according to claim 1, which is characterized by comprising intelligent current monitoring equipment and alarm equipment, wherein the rest cable comprises an A wire, a B wire and a C wire, the current leading-out device of the rest cable according to claim 1 is arranged at two ends of the A wire, the B wire and the C wire, the tail ends of the A wire, the B wire and the C wire are connected with each other to realize three-phase short circuit, the head ends of the A wire, the B wire and the C wire are respectively correspondingly connected with the A-phase, the B-phase and the C-phase connecting ends of the intelligent current monitoring equipment, and the intelligent current monitoring equipment is connected with the alarm equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010918591.6A CN111952924A (en) | 2020-09-03 | 2020-09-03 | Current leading-out device of resting cable, installation method and anti-theft alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010918591.6A CN111952924A (en) | 2020-09-03 | 2020-09-03 | Current leading-out device of resting cable, installation method and anti-theft alarm system |
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| CN111952924A true CN111952924A (en) | 2020-11-17 |
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| CN202010918591.6A Pending CN111952924A (en) | 2020-09-03 | 2020-09-03 | Current leading-out device of resting cable, installation method and anti-theft alarm system |
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