A standby cable real-time monitoring system

Abstract

This utility model belongs to the field of railway transportation technology and discloses a real-time monitoring system for backup cables. It includes a DC power supply connected to multiple connected backup cables to provide DC voltage; a relay connected to the multiple connected backup cables; an indicator light connected to the relay to indicate the status of the multiple connected backup cables; an insulation testing unit connected to the multiple connected backup cables to measure their resistance to ground; and a loop resistance testing unit connected to the multiple connected backup cables to measure the loop resistance of the closed loop formed by the multiple connected backup cables. The real-time monitoring system for backup cables provided by this utility model greatly reduces manual testing, decreases the number of trackside operations, reduces safety hazards, and reduces workload.

Description

Technical Field

[0001] This utility model relates to the field of railway transportation communication technology, and in particular to the field of cable condition monitoring technology, specifically to a real-time monitoring system for backup cables. Background Technology

[0002] Currently, backup cables in the railway network are tested annually, but this testing cycle cannot detect cable breaks or wire mixing faults in a timely and real-time manner. Furthermore, testing backup cables now requires personnel to travel remotely to seal and connect the core wires before testing can be conducted indoors, inevitably increasing the workload for staff. When any pair of core wires in a cable fails, personnel cannot immediately confirm whether the backup cable core wires are functioning correctly; they must wait for outdoor fault-handling personnel to arrive on-site for testing and confirmation. If the backup cable has also already failed and has not been detected in time, situations may arise where personnel are ready to use the backup core wires for reconnection, but the backup core wires are unusable, significantly increasing fault latency. Utility Model Content

[0003] The purpose of this utility model is to provide at least one real-time monitoring system for backup cables, which eliminates manual testing, reduces the number of on-line operations, reduces safety hazards, and reduces workload.

[0004] To address the aforementioned technical problems, at least one embodiment of this utility model provides a real-time monitoring system for backup cables, comprising:

[0005] A DC power supply, connected to multiple spare cables, is used to provide DC voltage;

[0006] The relay is connected to the multiple spare cables.

[0007] An indicator light, connected to the relay, is used to indicate the status of the multiple connected spare cables;

[0008] An insulation testing unit, connected to the multiple connected spare cables, is used to measure the ground resistance of the multiple connected spare cables;

[0009] The loop resistance test unit is connected to the multiple connected spare cables and is used to measure the loop resistance of the closed loop formed by the multiple connected spare cables.

[0010] In some embodiments, the positive terminal of the relay coil is connected to the positive terminal of the DC power supply via the plurality of connected spare cables; the negative terminal of the relay coil and the negative terminal of the DC power supply are grounded.

[0011] In some embodiments, a real-time monitoring system for backup cables further includes:

[0012] The display unit is connected to the insulation test unit and the loop resistance test unit, and is used to display the resistance to ground and the loop resistance.

[0013] In some embodiments, the display unit is a touch screen.

[0014] In some embodiments, a real-time monitoring system for backup cables further includes:

[0015] The rectifier is connected to the DC power supply and the indicator light.

[0016] In some embodiments, a real-time monitoring system for backup cables further includes:

[0017] An audible alarm is connected to the relay, and the audible alarm and the indicator light are used to obtain the status of the spare cable based on the contact status of the relay.

[0018] In some embodiments, the sound alarm is a buzzer.

[0019] In some embodiments, a real-time monitoring system for backup cables further includes:

[0020] A fuse is connected to the plurality of connected spare cables, and the fuse has a fusing current of 1.55A.

[0021] In some embodiments, the relay type is a normally open relay.

[0022] In some embodiments, the backup cable type is YJV22, YJY23, and NH-YJV22.

[0023] This utility model provides a real-time monitoring system for backup cables, comprising: a DC power supply connected to multiple connected backup cables for providing DC voltage; a relay connected to the multiple connected backup cables; an indicator light connected to the relay for indicating the status of the multiple connected backup cables; an insulation testing unit connected to the multiple connected backup cables for measuring the resistance to ground of the multiple connected backup cables; and a loop resistance testing unit connected to the multiple connected backup cables for measuring the loop resistance of the closed loop formed by the multiple connected backup cables. Compared with the prior art, the real-time monitoring system for backup cables provided in this application has the following advantages:

[0024] (1) No manual testing is required. The status of the backup cable can be reflected in real time on the monitoring panel, which reduces the number of on-line operations, reduces safety hazards, and reduces the workload.

[0025] (2) It can monitor the status of the backup cable in real time. If the backup cable is broken, there will be an audible and visual alarm. It can promptly detect potential equipment problems and ensure that the backup core wire is in good condition.

[0026] (3) When dealing with a broken wire fault, there is no need to perform core wire testing again, reducing the fault handling procedure and shortening the equipment fault delay.

[0027] (4) The insulation value of a pair of core wires to ground can be tested at once by simply disconnecting the DC power supply circuit breaker. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, and these illustrative descriptions do not constitute a limitation on the embodiments.

[0029] Figure 1 This is a schematic diagram of the structure of a real-time monitoring system for backup cables provided in an embodiment of this utility model;

[0030] Figure 2 This is a construction design drawing of a backup cable real-time monitoring system provided by a specific embodiment of this utility model;

[0031] Figure 3 This is a diagram of the rectifier's operating power supply provided in a specific embodiment of this utility model;

[0032] Figure 4 This is a schematic diagram (within the box) of the D2GJ cable monitoring relay operation principle provided by a specific embodiment of this utility model;

[0033] Figure 5 This is a schematic diagram of the backup cable real-time monitoring indicator light assembly provided in a specific embodiment of this utility model;

[0034] Figure 6 This is a schematic diagram of the sound and light alarm principle provided by a specific embodiment of this utility model. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this utility model. The various embodiments can be combined with and referenced by each other without contradiction.

[0036] In the following, the terms “comprising” or “may include”, which may be used in various embodiments of the present invention, indicate the presence of the claimed function, operation, or element, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the present invention, the terms “comprising,” “having,” and their cognates are intended only to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or adding one or more combinations of the foregoing.

[0037] In various embodiments of this utility model, the expression "or" or "at least one of B and / or C" includes any combination or all combinations of the words listed simultaneously. For example, the expression "B or C" or "at least one of B and / or C" may include B, may include C, or may include both B and C.

[0038] The terms used in the various embodiments of this utility model (such as "first," "second," etc.) may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above terms do not limit the order and / or importance of the elements. The above terms are only used for the purpose of distinguishing one element from other elements. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of this utility model, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0039] It should be noted that if a description refers to "connecting" a component to another component or "connecting" it to another component, then the first component can be directly connected to the second component, and a third component can be "connected" between the first and second components. Conversely, when a component is "directly connected" to another component or "directly connected" to another component, it can be understood that there is no third component between the first and second components.

[0040] The terminology used in the various embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of this invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this invention pertain. The terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this invention.

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0042] In some embodiments, see Figure 1 This application provides a real-time monitoring system for backup cables, comprising:

[0043] DC power supply, with multiple connected spare cables ( Figure 1 As shown in Figures 1, 2...n (where n is the number of spare cables), these cables are connected to provide DC voltage.

[0044] The relay is connected to the multiple spare cables.

[0045] An indicator light, connected to the relay, is used to indicate the status of the multiple connected spare cables;

[0046] An insulation testing unit, connected to the multiple connected spare cables, is used to measure the ground resistance of the multiple connected spare cables;

[0047] The loop resistance test unit is connected to the multiple connected spare cables and is used to measure the loop resistance of the closed loop formed by the multiple connected spare cables.

[0048] Specifically, the real-time monitoring system for spare cables provided in this application utilizes relay devices for real-time monitoring. The method involves connecting a spare core wire in series, treating this series-connected spare core wire as a conductor, and then applying a DC voltage to this conductor to activate the relay. Finally, a specific stage of a 24V power supply illuminates the corresponding indicator light through the relay's activation contacts. During routine maintenance, simply checking whether all indicator lights are functioning correctly is sufficient to determine the condition of the through-wire.

[0049] A direct current power supply (DC power supply) is a power supply device that provides a constant voltage or current, with the output current flowing in a constant direction. DC power supplies can be classified according to different criteria:

[0050] Classified by working principle:

[0051] Linear power supplies provide a stable DC output through steps such as transformer step-down, rectification, filtering, and voltage regulation. Their advantages are low ripple and low noise, but their efficiency is relatively low and their size and weight are relatively large.

[0052] Switching power supply: It uses high-frequency switching technology to provide DC output through switching conversion, rectification, filtering and other steps. Its advantages are high efficiency, small size and light weight, but its ripple and noise are relatively large.

[0053] Classification by output characteristics:

[0054] Fixed output DC power supply: The output voltage or current is fixed and cannot be adjusted.

[0055] Adjustable output DC power supply: The output voltage or current can be adjusted within a certain range, making it suitable for tests and experiments that require different voltages or currents.

[0056] Classified by application:

[0057] Laboratory power supplies: used for laboratory testing and development, typically featuring adjustable output and multiple protection functions.

[0058] Industrial power supplies: used in industrial control and automation equipment, which typically require high reliability and stability.

[0059] Communication power supply: Used in communication equipment, requiring high stability and low noise.

[0060] Classified by input power type:

[0061] AC-to-DC power supply: Converts AC power (such as mains power) to DC power.

[0062] DC-DC power supply: Converts one type of DC power supply to another, often used for voltage conversion and regulation.

[0063] It should be noted that the main parameters to consider when selecting and using the above-mentioned DC power supplies include output voltage range, output current range, ripple and noise, stability, efficiency, protection functions (such as overvoltage protection, overcurrent protection, short circuit protection, etc.), as well as physical size and heat dissipation.

[0064] A relay is an automatic control electrical switching device, mainly used to control the switching of high-power circuits. It works by utilizing the principle of electromagnetic induction, switching a high-voltage circuit by using a low-voltage signal in the control circuit.

[0065] A relay consists of a coil, contacts, and an iron core. During operation, a low-voltage control signal flows through the relay coil, generating a magnetic field that attracts the iron core, causing the contacts to change position and thus controlling the opening and closing of the circuit. When the control current is disconnected, the magnetic field disappears, the iron core resets, the contacts return to their original state, and the circuit stops receiving power. Specifically:

[0066] Coil: The core component of the relay, generating a magnetic field when energized. Armature: When the coil is energized, the armature is attracted by magnetic force, causing the contacts to change state. Contacts: The switching part of the relay, responsible for connecting or disconnecting the circuit. Contacts come in two forms: normally open (NO) and normally closed (NC), representing "open circuit when not energized" and "closed circuit when not energized," respectively. Spring: Used to reset the contacts when the current is interrupted.

[0067] Main types of relays:

[0068] Mechanical relays: The most common type, which use the electromagnetic effect of a coil to drive a mechanical structure to switch contact states. Advantages: Simple structure, stable operation, and relatively low price. Disadvantages: Mechanical parts wear down, resulting in a relatively short service life and slower response time.

[0069] Solid-state relays (SSRs) use semiconductor components (such as transistors and bipolar transistors) instead of mechanical contacts. Advantages: No mechanical parts, long service life, fast response speed, and strong resistance to vibration and shock. Disadvantages: Higher price and usually requires additional heat dissipation.

[0070] Thermal relays are used to protect motors, power tools, and other equipment in circuits from overload. They detect current through a thermal element (usually a bimetallic strip) and automatically disconnect the circuit when an overload occurs.

[0071] Time relays: including time delay relays, timers, etc., are used to control the delayed start or stop of circuits.

[0072] Automatic reset relay: After the contacts are opened, they automatically reset after a period of time, so that the contacts return to their initial state.

[0073] The insulation test unit is used to measure the resistance to ground of spare cables by applying a high voltage (typically 500V or 1000V). A megohmmeter is used to measure the cable insulation resistance, which is measured in megohms (MΩ).

[0074] The testing procedure includes: ensuring the cable is completely de-energized and discharged. Cleaning the cable surface to remove dirt and moisture. Connecting the positive terminal of the megohmmeter to the cable conductor and the negative terminal to ground or the cable shield. Applying the test voltage according to the standard (e.g., 500V or 1000V). Recording the stabilized insulation resistance value. Determining whether the insulation resistance is qualified according to the standard.

[0075] The loop resistance test unit is used to measure the loop resistance of a closed loop containing a spare cable. Specifically: ensure the loop is completely de-energized and discharged. Clean the connection points, ensuring good contact. Connect the positive and negative terminals of the tester to the two ends of the loop, respectively, and apply the test current as required by the equipment. Record the stable loop resistance value, and determine whether the loop resistance is qualified according to the standard.

[0076] In some embodiments, the positive terminal of the relay coil is connected to the positive terminal of the DC power supply via the plurality of connected spare cables; the negative terminal of the relay coil and the negative terminal of the DC power supply are grounded.

[0077] In some embodiments, a real-time monitoring system for backup cables further includes:

[0078] The display unit is connected to the insulation test unit and the loop resistance test unit, and is used to display the resistance to ground and the loop resistance.

[0079] In some embodiments, the display unit is a touch screen.

[0080] In some embodiments, a real-time monitoring system for backup cables further includes:

[0081] The rectifier is connected to the DC power supply and the indicator light.

[0082] A rectifier is an electronic device or circuit that converts alternating current (AC) into direct current (DC). Rectifiers are indispensable components in power systems and are widely used in power electronic equipment, chargers, battery-powered systems, DC motor drives, and various other applications.

[0083] The working principle of rectification is based on the unidirectional conductivity of semiconductor diodes. During the positive half-cycle of alternating current, the current flows through the diodes of the rectifier; during the negative half-cycle, the diodes do not conduct, thus "cutting off" the current during the negative half-cycle. The output current only includes the positive half-cycle portion, thereby obtaining a unidirectional direct current.

[0084] Main types of rectifiers:

[0085] Half-wave rectifier: The simplest rectification method, using a single diode. During the positive half-cycle of the alternating current, the diode conducts, and current flows; during the negative half-cycle, the diode is cut off and does not conduct. The output current is only a portion of the positive half-cycle, exhibiting significant ripple, and the quality of the output DC current is poor.

[0086] Full-wave rectifier: It uses two or four diodes to output current in both the positive and negative half-cycles of AC power, providing a more stable DC current.

[0087] Bridge rectifier: The most common form of full-wave rectification, using four diodes to form a bridge circuit. It can make full use of the positive and negative half-cycles of the alternating current, resulting in smaller ripple in the output DC current.

[0088] Three-phase rectifier: mainly used for rectifying three-phase AC power, usually using six diodes (full-wave bridge rectifier), which can provide a more stable DC output.

[0089] In some embodiments, a real-time monitoring system for backup cables further includes:

[0090] An audible alarm is connected to the relay, and the audible alarm and the indicator light are used to obtain the status of the spare cable based on the contact status of the relay.

[0091] In some embodiments, the sound alarm is a buzzer.

[0092] In some embodiments, a real-time monitoring system for backup cables further includes:

[0093] A fuse is connected to the plurality of connected spare cables, and the fuse has a fusing current of 1.55A.

[0094] In some embodiments, the relay type is a normally open relay. The audible alarm determines that the backup cable is in an abnormal state by detecting a signal when the relay contacts open.

[0095] In some embodiments, the backup cable type is YJV22, YJY23, and NH-YJV22.

[0096] To further illustrate the solution, this utility model also provides a specific implementation of a real-time monitoring system for backup cables, which includes the following:

[0097] The principle will now be explained using the cable between stations A as an example.

[0098] (1) Arrangement of combined positions:

[0099] Based on the number of cables, the required number of rectifiers and relays is calculated and arranged in a specific order. The calculation shows that a total of 6 layers of equipment are needed within the A station area. The construction design drawings are as follows: Figure 2 As shown:

[0100] (2) Working principle of rectifier power supply.

[0101] The XZ22 train has a regulated backup power supply at ground level. Investigation revealed that this power supply powers the current sensors of the signal lights in the CTC section, the section fuse alarms, and the rectifiers for the station fuse alarms. Power outages to these devices will not affect normal train operation. Therefore, the regulated power supply terminals at ground level XZ22 can be used for cable monitoring. Figure 3 As shown, the 220V power supply from the ground floor passes through the ground floor circuit breaker to the side circuit breaker, where it powers the rectifier. After the rectifier operates, it outputs a DC power supply of 24-66V.

[0102] (3) Introduction to the operating principle of monitoring relays:

[0103] The following describes the process using the backup cable at the D2G split point as an example. The 220V power supply is rectified into DC output. The negative terminal of the output DC voltage passes through the QF-5-1-10 distribution panel to terminal 18 of the upstream C2G split point, and then through a horizontal cable to terminal 18 of the downstream D2G split point. Terminals 17 and 18 of the D2G XB box are manually connected. After the current reaches terminal 18 of D2G, it goes through a short circuit to terminal 17, then through a horizontal cable to terminal 17 of C2G, then through a main cable to the section distribution panel QF-5-1-9, and finally through a 7*0.52 connecting wire to terminal 4 of D2GJ. Terminal 1 of D2GJ is connected to the positive output of the rectifier, thus activating the corresponding relay. If there is a break in the line through which the negative terminal passes, the negative terminal cannot return to terminal 4 of the relay, and the relay will drop, indicating a break in one of the two backup core wires, requiring repair. Each cable corresponds to one monitoring relay. Multiple core wires are connected in series for monitoring. See [link to relevant documentation]. Figure 4 .

[0104] (4) Cable breakage audible and visual alarm principle:

[0105] To facilitate timely detection of cable breakage faults by maintenance personnel, an audible and visual alarm system was installed on the rack. The design plan is to install it on the 6th floor. The installation effect is shown in the rack arrangement diagram. The audible and visual alarm system is as follows: Figure 5 As shown:

[0106] When a cable breaks, the corresponding monitoring relay de-activates, the corresponding green indicator light goes out, the overall alarm red light illuminates, and the alarm sounds. The specific principle is as follows: Figure 6 As shown:

[0107] Take the 3661 signal cable as an example. Figure 6 As shown, when the 3661 signal cable breaks or one of the spare core wires breaks, the 3661J monitoring relay drops. Since the positive terminal of the 3661 green light passes through the first set of pull-up contacts of the 3661J, the 3661 green light goes out when the 3661J drops.

[0108] The circuit diagram includes a cable alarm relay, DLBJ. The DLBJ relay operates as follows: the positive power supply is connected to terminal 1 of the relay via the second set of energizing contacts of all monitoring relays in each zone, while the negative power supply is directly connected to terminal 4. When all cables are functioning correctly, all corresponding monitoring relays are energized. When the DLBJ relay is energized, the alarm indicator light and alarm are not powered, and there is no audible or visual alarm. When any cable breaks or the spare wire breaks, the negative terminal cannot reach terminal 1 of the DLBJ, causing the DLBJ to deactivate. As shown in the schematic diagram above, when the DLBJ deactivates, it powers on the main alarm indicator (red light) and the audible alarm. At this time, the alarm indicator light on the monitoring unit illuminates, and the audible alarm sounds.

[0109] An embodiment of this utility model provides a real-time monitoring system for backup cables, comprising: a DC power supply connected to multiple connected backup cables for providing DC voltage; a relay connected to multiple connected backup cables; an indicator light connected to the relay for indicating the status of the multiple connected backup cables; an insulation testing unit connected to the multiple connected backup cables for measuring the resistance to ground of the multiple connected backup cables; and a loop resistance testing unit connected to the multiple connected backup cables for measuring the loop resistance of the closed loop formed by the multiple connected backup cables.

[0110] The technical problem this application aims to solve is to address the shortcomings of the aforementioned existing system by utilizing relay equipment for real-time monitoring. The method involves connecting a spare core wire in series, treating this series-connected spare core wire as a conductor, and then applying a DC voltage to this conductor to activate the relay. Finally, a specific stage of a 24V power supply is used to illuminate the corresponding indicator light through the relay's activation contacts. During routine maintenance, simply checking whether all indicator lights are functioning correctly is sufficient to determine the condition of the through-wire.

[0111] Specifically, the real-time monitoring system for backup cables provided in this application eliminates manual testing, reduces the number of on-site operations, reduces safety hazards, and reduces workload. The monitoring panel can reflect the status of the backup cable in real time, allowing on-site personnel to monitor the status of the backup core wires. In the event of a cable fault, it can accurately and quickly determine whether the backup cable is usable, eliminating the need for remote testing and reducing the time spent on developing and handling fault solutions. The developed real-time monitoring system for backup cables in the section has undergone multiple improvements and field tests, meeting the requirements of on-site electrical personnel. It achieves the goals of eliminating manual on-site testing, reducing on-site operations, reducing safety hazards, and reducing workload, while also providing real-time monitoring of the backup cable status on the monitoring panel. The real-time monitoring system for backup cables in the section can accurately detect cable interruptions. When a backup cable is interrupted, the corresponding indicator light indoors goes out, and an audible and visual alarm sounds, enabling real-time monitoring of the backup cable.

[0112] In the description of this specification, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0113] The terms "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of the present invention, and the order of steps is not limited and may be adjusted appropriately as needed.

[0114] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0115] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A standby cable real-time monitoring system, characterized by, Comprise: A direct current power supply connected with the plurality of connected backup cables for providing direct current voltage; A relay connected with the plurality of connected backup cables; An indicating lamp connected with the relay for indicating the state of the plurality of connected backup cables; An insulation test unit connected with the plurality of connected backup cables for measuring the ground resistance of the plurality of connected backup cables; A loop resistance test unit connected with the plurality of connected backup cables for measuring the loop resistance of the closed loop formed by the plurality of connected backup cables.

2. The backup cable real-time monitoring system of claim 1, wherein, The positive pole of the coil of the relay is connected with the positive pole of the direct current power supply through the plurality of connected backup cables; the negative pole of the coil of the relay and the negative pole of the direct current power supply are grounded.

3. The backup cable real-time monitoring system of claim 1, wherein, Further comprise: A display unit connected with the insulation test unit and the loop resistance test unit for displaying the ground resistance and the loop resistance.

4. The backup cable real-time monitoring system of claim 3, wherein, The type of the display unit is touch screen.

5. The back-up cable real-time monitoring system of claim 1, wherein, Further comprise: A rectifier connected with the direct current power supply and the indicating lamp.

6. The back-up cable real-time monitoring system of claim 1, wherein, Further comprise: A sound alarm connected with the relay, the sound alarm and the indicating lamp are used for obtaining the state of the backup cable according to the contact state of the relay.

7. The back-up cable real-time monitoring system of claim 6, wherein, The type of the sound alarm is buzzer.

8. The backup cable real-time monitoring system of claim 1, wherein, Further comprise: A fuse connected with the plurality of connected backup cables, the fuse current of the fuse is 1.55A.

9. The backup cable real-time monitoring system of claim 1, wherein, The type of the relay is normally open relay.

10. The back-up cable real-time monitoring system of claim 1, wherein, The type of the backup cable is YJV22, YJY23 and NH-YJV22.

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