CN113791282B - Electricity safety monitoring system and building thereof - Google Patents
Electricity safety monitoring system and building thereof Download PDFInfo
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- CN113791282B CN113791282B CN202111069977.5A CN202111069977A CN113791282B CN 113791282 B CN113791282 B CN 113791282B CN 202111069977 A CN202111069977 A CN 202111069977A CN 113791282 B CN113791282 B CN 113791282B
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
- G01R27/205—Measuring contact resistance of connections, e.g. of earth connections
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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Abstract
The invention discloses an electricity consumption safety monitoring system which comprises a grounding grid, a grounding resistance detection device, a grounding state monitoring device, a centralized acquisition component and a state monitoring terminal, wherein the grounding resistance detection device and the grounding state monitoring device are connected in series with the grounding grid, the grounding resistance detection device is connected with the grounding state monitoring device in parallel, the grounding resistance detection device, the grounding state monitoring device and the grounding grid form a circuit loop, the grounding resistance value detected by the grounding resistance detection device is larger than a preset resistance threshold, and the grounding resistance detection device cuts off the electric connection of the circuit loop. The invention can flexibly set the preset resistance threshold according to the actual demands of customers, effectively reduces the situations of false alarm and missing alarm, reduces the maintenance cost, improves the customer experience, can effectively avoid electric shock accidents and electric fires, and improves the reliability and the safety of a power supply system.
Description
Technical Field
The invention belongs to the technical field of electricity safety, and particularly relates to an electricity safety monitoring system and a building thereof.
Background
With the development of modern society, the scale of intelligent building is continuously expanding, and the use of various electrical appliances in the intelligent building is also increasing, especially the popularization of computer network information technology, and the building is increasingly adopting various informationized electrical equipment, which brings the following new problems for the electrical appliance protection and grounding of the intelligent building:
1. overload and short-circuit protection are mainly emphasized in the traditional low-voltage power supply system, and the purpose of the traditional low-voltage power supply system is to protect electric equipment and power supply lines from damage. However, if the power supply system does not take reliable grounding measures or does not make grounding according to the requirements of the building lightning protection design rule, the method of mixed use of the grounding form of the low-voltage power distribution system exists in the building electrical design and construction process, or the quality of electrical grounding is not in accordance with the requirements, and the important electronic equipment is not connected with equipotential, and the like, electric shock accidents are very easy to happen.
2. The measures such as protection zero connection and overcurrent protection device arranged in the existing low-voltage distribution system can not completely and effectively prevent the occurrence of electric leakage fire, so that frequent fire accidents of high-rise buildings are caused.
3. With the use of a large number of electrical equipment, the application of the leakage protector is also becoming popular, the leakage protector is used for effectively preventing personal electric shock and electrical fire protection electrical appliances caused by ground faults in a limited time, but the leakage protector cannot play a due role due to improper selection or incorrect wiring, and the reliability and safety of a power supply system are reduced.
4. In the design of a low-voltage distribution system, when a short circuit fault of large short circuit current occurs in a lower-level distribution circuit, even if an upper-level protection device of the low-voltage distribution system is provided with a so-called three-stage protection circuit breaker with short circuit delay, the low-level distribution circuit breaker is always unselectably tripped out of level, large-area power failure is caused, and sometimes huge economic loss is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the first aspect of the invention provides an electric safety monitoring system, which monitors the resistance value and the grounding state of a grounding grid of a building in an all-around manner in real time, once the resistance value or the grounding state of the grounding grid occurs, the electric connection of a circuit loop where the grounding grid is positioned is automatically cut off and an indication signal is sent out, so that the condition that the electric connection of the whole building is interrupted due to abnormal resistance value or grounding state of the grounding grid at a certain position is avoided, the safety of electric equipment of the building is protected to the greatest extent, fault occurrence points can be found as soon as possible according to the indication signal, the maintenance and repair cost is greatly saved, and meanwhile, accidents such as fire, electric shock and the like caused by nonstandard grounding when overload or short-circuit protection is adopted can be avoided.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electrical safety monitoring system, including a ground network, a ground resistance detection device, a ground state monitoring device, a centralized collection unit and a state monitoring terminal, wherein the ground resistance detection device and the ground state monitoring device are connected in series with the ground network, the ground resistance detection device is connected in parallel with the ground state monitoring device, the ground resistance detection device detects a current ground resistance value of a line in real time, the ground state monitoring device monitors ground state information of the current line in real time, the centralized collection unit is configured to collect the ground resistance value and the ground state information of the current line, and upload the ground resistance value and the ground state information to the state monitoring terminal, the state monitoring terminal is configured to store the ground resistance value and the ground state information, the ground resistance detection device, the ground state monitoring device and the ground network form a circuit loop, the ground resistance value detected by the ground resistance detection device is greater than a preset resistance threshold, and the ground resistance detection device cuts off electrical connection of the circuit loop.
Further, the ground resistance detection device comprises a first ground resistance detection device and a second ground resistance detection device, the centralized acquisition component comprises a first centralized acquisition component and a second centralized acquisition component, the ground state monitoring device comprises a first ground state monitoring device and a second ground state monitoring device, the first ground resistance detection device is directly connected with two unconnected auxiliary ground grids and the ground grids at the same time, the first ground resistance detection device, the first ground state monitoring device and the ground grids form a first circuit loop, the first circuit loop is connected with the first acquisition component in series, the second ground resistance detection device is connected with the ground grids through the ground devices, the second ground resistance detection device, the second ground state monitoring device, the ground devices and the ground grids form a second circuit loop, and the second circuit loop is connected with the second acquisition component in series.
Preferably, the number of the first grounding state monitoring devices is n, and n is a positive integer greater than or equal to 1.
Preferably, the number of the second grounding state monitoring devices is m, and m is a positive integer greater than or equal to 1.
Preferably, the grounding device comprises a grounding bar and/or a lightning protection ground wire.
Preferably, the second grounding state monitoring device is connected with the grounding grid through an external device, and the external device comprises a distribution box, a grounding bar and electric equipment.
Further, the ground resistance detection device, the ground state monitoring device, the centralized acquisition component and the state monitoring terminal further comprise wireless data transmission components, the ground resistance detection device, the ground state monitoring device and the centralized acquisition component are respectively connected, and the centralized acquisition component and the state monitoring terminal are connected through the wireless data transmission components to perform data transmission.
In a second aspect of the present invention, there is provided a building including the first circuit loop and the second circuit loop, wherein the first ground resistance detection device, the first ground state monitoring device and the ground grid form the first circuit loop; the second grounding resistance detection device, the second grounding state monitoring device, the grounding device and the grounding grid form a second circuit loop, wherein the first circuit loop and the first centralized acquisition component form a first safety monitoring system; the second circuit loop and the second centralized acquisition component form a second safety monitoring system, the first safety monitoring system is arranged on one floor of the building, and the second safety monitoring system is arranged on other floors of the building.
Further, the first circuit loop is connected in series with the first centralized collection component, the second circuit loop is connected in series with the second centralized collection component, and the first safety monitoring system and the second safety monitoring system are connected in parallel.
Further, when the first grounding state monitoring device monitors abnormal grounding state data, the electrical connection of the first circuit loop is cut off, and when the second grounding state monitoring device monitors abnormal grounding state data, the electrical connection of the second circuit loop is cut off.
Further, when the grounding resistance value detected by the first grounding resistance detection device is greater than a preset resistance threshold, the first grounding resistance detection device cuts off the electrical connection of the first safety monitoring system, and when the grounding resistance value detected by the second grounding resistance detection device is greater than the preset resistance threshold, the second grounding resistance detection device cuts off the electrical connection of the second safety monitoring system.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the circuit grounding resistance value and the grounding state information are monitored in real time, once the circuit fails, the fault circuit is immediately powered off, the alarm is not needed to be given after the circuit is overloaded or short-circuited, and once the circuit is grounded, the fault circuit is immediately powered off, so that the occurrence of electric shock accidents and electric fires is avoided, and the reliability and the safety of a power supply system are improved.
2. According to the invention, the first safety monitoring system is arranged on one layer on the ground of the building, so that the length of a connecting line of the first safety monitoring system with the grounding grid and the auxiliary grounding grid is effectively saved, and the installation cost is saved.
3. According to the invention, the second safety monitoring system is arranged on more than one floor of the ground of the building, and the second safety monitoring system is not required to be directly connected with the grounding grid and the auxiliary grounding grid, so that the installation difficulty of the safety monitoring system is reduced.
4. According to the invention, the first safety monitoring system and the second safety monitoring system are connected in parallel, so that the normal operation of the second safety monitoring system is not affected after the first safety monitoring system is in abnormal state and the electric connection is cut off.
5. According to the invention, the preset resistance threshold can be flexibly set according to the actual demands of customers, so that false alarm and missing alarm conditions are effectively reduced, the maintenance cost is reduced, and the customer experience is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electrical safety monitoring system according to the present invention;
FIG. 2 is a schematic diagram of a first embodiment of an electrical safety monitoring system according to the present invention;
FIG. 3 is a schematic diagram of a second embodiment of an electrical safety monitoring system according to the present invention;
fig. 4 is a schematic structural diagram of a first grounding resistance detecting device of an electrical safety monitoring system according to the present invention.
Fig. 5 is a schematic structural diagram of a second ground resistance detection device of the electrical safety monitoring system according to the present invention.
Fig. 6 is a schematic diagram of an embodiment of an electrical safety monitoring system for a building according to the present invention.
Reference numerals:
a1 … … first safety monitoring system
A2 … … second safety monitoring system
A3 … … grounding resistance detection device
A4 … … grounding state monitoring device
A5 … … concentrated acquisition component
A6 … … state monitoring terminal
A7 … … grounding grid
102 … … first grounding state monitoring device
103 … … first centralized collection component
104 … … auxiliary grounding net
105 … … first ground resistance detection device
201 … … external device
202 … … grounding device
203 … … second ground resistance detection device
204 … … second grounding state monitoring device
205 … … second centralized collection element
401 … … sounding mechanism
402 … … lighting mechanism
403 … … first alarm assembly
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to facilitate understanding of the technical scheme of the invention, the related technical terms of the invention are interpreted as follows:
the grounding grid is a general term for a grounding body which is formed by mutually connecting a plurality of metal grounding poles buried in the ground at a certain depth and conductors. The device is widely applied to the industries of electric power, buildings, computers, industrial and mining enterprises, communication and the like, and plays roles of safety protection, shielding and the like.
The auxiliary grounding grid is used for auxiliary testing of the resistance value of the grounding grid by adopting a mode that the conductor is directly contacted with the ground. The construction installation can be carried out together with the grounding grid, or the installation can be carried out separately.
The smaller the grounding resistance is, the better the grounding resistance is, the general standard is 4-10 ohms according to different requirements of equipment, the highest standard cannot be more than 10 ohms, and the lower the grounding resistance is, the better the grounding resistance is, and the preset resistance threshold can be set according to the requirements of customers.
The standard ground resistance specification currently practiced requires:
1. the independent lightning protection grounding resistance should be not more than 10 ohm;
2. the independent safety protection grounding resistance should be no more than 4 ohms;
3. the independent alternating current working grounding resistance should be not more than 4 ohm;
4. the independent direct current working grounding resistance is not more than 4 ohms;
5. the common ground (combined ground) should be no greater than 1 ohm.
The grounding bar is arranged on copper plates connected with a grounding body on equipment and galvanized flat iron arranged along the wall of a power distribution room.
The lightning protection ground wire is one or two pairs of bare wires which are arranged above the underground optical/cable and parallel to the optical/cable, the bare wires are fully grounded and relatively close to the lightning strike point, and the wire is one of the hit targets which is the same as the optical/cable if the wire is not the primary target of lightning current attack, so the wire buried above the optical/cable is called a buried optical/cable underground shielding wire and is commonly called a drainage wire or a lightning protection ground wire.
The distribution box is a circuit distribution box for all users to use electricity.
As shown in fig. 2, the first ground resistance detecting device 105 directly detects the ground resistance by using a three-point method, and the first ground resistance detecting device 105 needs to be connected to two unconnected auxiliary ground nets 104 and the ground net A7 at the same time, that is, connected to three points to detect the ground resistance. The accuracy of the ground resistance detected by the first ground resistance detecting means 105 is high, but the installation requirement is relatively high because of the need to directly connect with the ground net A7 and the auxiliary ground net 104.
As shown in fig. 3, the second ground resistance detection device 203 detects the loop resistance by a loop method, and the second ground resistance detection device 203 may be directly installed to detect the loop-formed ground system, or if the loop-formed ground system is not present, the auxiliary ground network 104 needs to be added to form a loop, and then the second ground resistance detection device 203 is installed. Since the second ground resistance detection device 203 does not need to be directly connected to the ground net A7 and the auxiliary ground net 104, the installation requirement is relatively low.
The first aspect of the invention provides an electricity consumption safety monitoring system, which comprises a grounding grid A7, a grounding resistance detection device A3, a grounding state monitoring device A4, a centralized acquisition component A5 and a state monitoring terminal A6.
Referring to fig. 1, the ground resistance detection device A3 and the ground state monitoring device A4 are connected in series with the ground network A7, and the ground resistance detection device A3 is connected in parallel with the ground state monitoring device A4.
Further, the grounding resistance detection device A3 detects the current grounding resistance value of the circuit in real time, the grounding state monitoring device A4 monitors the grounding state information of the current circuit in real time, and the centralized acquisition component A5 is used for acquiring the grounding state information monitored by the grounding state monitoring device A4 and the resistance value detected by the grounding resistance detection device A3.
Specifically, the ground state monitoring device A4 transmits the monitored ground state information to the centralized acquisition component A5, and the ground resistance detecting device A3 also transmits the detected resistance value to the centralized acquisition component A5.
In one embodiment, the centralized acquisition component A5 actively extracts the current data of the ground state monitoring device A4 and the ground resistance detection device A3.
Further, the centralized acquisition component A5 uploads the acquired grounding state information and grounding resistance value to the state monitoring terminal A6, and the state monitoring terminal A6 stores the information, so that a user can check the information at any time conveniently.
The state monitoring terminal A6 may be a device having a storage function such as a PC or a mobile terminal.
Further, the ground resistance detection device A3, the ground state monitoring device A4 and the ground network A7 form an independent circuit loop, and when the ground resistance value detected by the ground resistance detection device A3 is greater than a preset resistance threshold, the ground resistance detection device A3 cuts off the electrical connection of the circuit loop.
Specifically, the preset resistance threshold may be set according to an actual situation.
In one embodiment, the preset resistance threshold is 0-10 ohms. When the current ground resistance value detected by the ground resistance detection device A3 is 11 ohms, the ground resistance detection device A3 automatically cuts off the electric connection of the circuit loop, when the current ground resistance value detected by the ground resistance detection device A3 is 1 ohm, the ground resistance detection device A3 does not perform any action, and the circuit loop normally works.
Further, the ground state monitoring device A4 monitors that the ground state is abnormal, and the ground state monitoring device A4 cuts off the electrical connection of the circuit loop.
Specifically, the ground state monitoring device A4 includes an optocoupler and an MCU, after the ground state monitoring device A4 supplies power, a voltage of about 5V is output to the ground network A7, the voltage passes through the optocoupler of the ground state monitoring device A4 through the circuit loop, the MCU collects the on-off state of the optocoupler to determine the ground state, the state is a normal state determination result, and the state is an abnormal state determination result.
Further, the ground state monitoring device A4 further comprises a third alarm assembly, the ground state monitoring device A4 monitors that the ground state is abnormal, the third alarm assembly can send out an alarm signal, and the effect of finding out a fault point can be achieved rapidly.
Specifically, the third alarm assembly comprises a third sounding mechanism and a third lighting mechanism, and the alarm signals are sound alarm signals and lighting alarm signals.
Further, the centralized acquisition component A5 includes a second alarm component, and when the centralized acquisition component A5 receives abnormal grounding resistance values or grounding state information, the second alarm component sends an alarm signal.
Specifically, the second alarm assembly comprises a second sounding mechanism and a second lighting mechanism, and the alarm signals are sound alarm signals and lighting alarm signals.
Preferably, the second sounding mechanism is a loudspeaker, and the second lighting mechanism is an LED lamp.
Specifically, the centralized acquisition component A5 receives all the grounding resistance values or grounding state information, and as long as one of the grounding resistance values or grounding state information is abnormal, the centralized acquisition component A5 notifies the second alarm component to send an alarm signal, so that a user can find a line fault point conveniently.
In one embodiment, the grounding resistance value is 11 ohms, the grounding state information is normal, and the centralized acquisition component A5 notifies the second alarm component to send out an alarm signal.
In the second embodiment, the ground resistance value is 0 ohm, the ground state information is normal, and the centralized acquisition component A5 does not perform any action.
In the third embodiment, the grounding resistance value is 1 ohm, the grounding state information is abnormal, and the centralized acquisition component A5 notifies the second alarm component to send out an alarm signal.
Further, the ground resistance detection device A3, the ground state monitoring device A4, the centralized acquisition component A5 and the state monitoring terminal A6 further comprise wireless data transmission components, the ground resistance detection device A3, the ground state monitoring device A4 and the centralized acquisition component A5 are connected, and the centralized acquisition component A5 and the state monitoring terminal A6 are connected through the wireless data transmission components to perform data transmission.
Referring to fig. 2, the ground resistance detecting device A3 includes a first ground resistance detecting device 105, the centralized collecting unit A5 includes a first centralized collecting unit 103, the ground state monitoring device A4 includes a first ground state monitoring device 102, the first ground resistance detecting device 105 is connected to two unconnected auxiliary ground grids 104 and the ground grid A7 at the same time, and the first ground resistance detecting device 105 can detect the ground resistance of the ground grid A7 in real time.
Specifically, the grounding grid A7 is disposed below a building and buried below the ground, a lightning protection ground wire connected with the grounding grid A7 is installed in a wall of the building, and the first grounding resistance detection device 105 and the first grounding state monitoring device 102 are connected with the lightning protection ground wire.
Further, the first ground resistance detecting device 105 is connected in parallel with the first ground state monitoring device 102.
Specifically, the number of the first grounding status monitoring devices 102 is n, where n is a positive integer greater than or equal to 1, and may be set according to the actual needs of the building.
Specifically, when the number of the first ground state monitoring devices 102 is greater than 1, the plurality of first ground state monitoring devices 102 are connected in parallel, and are simultaneously connected in parallel with the first ground resistance detecting device 105, and the first ground resistance detecting device 105 and the ground net A7 respectively form a first circuit loop with the first ground state monitoring devices 102.
Further, the first circuit loop is connected in series with the first focus collection part 103. Specifically, when the first ground resistance detecting device 105 detects an abnormal resistance value, the electrical connection of the first circuit loop is cut off.
Specifically, when the first grounding state monitoring device 102 monitors an abnormal grounding state, the electrical connection of the first circuit loop is cut off.
Specifically, when the electrical connection of the first circuit loop is cut off, the first centralized collection unit 103 will send out an alarm signal.
Referring to fig. 3, the ground resistance detecting device A3 includes a second ground resistance detecting device 203, the centralized collecting unit A5 includes a second centralized collecting unit 205, the ground state monitoring device A4 includes a second ground state monitoring device 204, and the second ground resistance detecting device 203 is connected to the ground network A7 through the ground device 202.
Specifically, the number of the second grounding status monitoring devices 204 is m, where m is a positive integer greater than or equal to 1, and may be set according to actual requirements.
Specifically, when the number of the second ground state monitoring devices 204 is greater than 1, the plurality of second ground state monitoring devices 204 are connected in parallel, and are simultaneously connected in parallel with the second ground resistance detecting device 203, and the second ground resistance detecting device 203, the ground device 202, and the ground net A7 respectively form a second circuit loop with the second ground state monitoring devices 204.
Specifically, the grounding device 202 may be a grounding bar, a lightning protection ground wire, or both.
Specifically, the second ground resistance detection device 203, the second ground state monitoring device 204, the grounding device 202, and the grounding network A7 form a second circuit loop.
Specifically, the second circuit loop is connected in series with the second centralized collection unit 205.
Further, the ground state monitoring device A4 may be connected to the ground network A7 through an external device 201.
Preferably, the external device 201 may be a distribution box, a grounding bar, or electric equipment, and may be installed in a connection manner according to actual requirements.
Further, the ground resistance detection device A3 further includes a first alarm component 403.
Specifically, when the second ground resistance detection device 203 detects an abnormal resistance value, the electrical connection of the second circuit loop is cut off.
Specifically, when the second grounding state monitoring device 204 detects an abnormal grounding state, the electrical connection of the second circuit loop is cut off. Specifically, the second centralized collection unit 205 may send an alarm signal when the electrical connection of the second circuit loop is cut off.
Referring to fig. 4, the first ground resistance detecting apparatus 105 further includes a first alarm component 403.
Specifically, the first ground resistance detection device 105 includes 19 ports, where the 1 st and 2 nd ports are connected to an external dc power supply, the 3 rd and 4 th ports are RS232 ports, and are used for being connected to a centralized acquisition component A5 of the corresponding port, the 6 th, 7 th and 8 th ports are used for transmitting a first generation mobile communication signal, that is, a 2.5G mobile communication signal, the 9 th, 10 th and 11 th ports are RS485 interfaces, and are used for being connected to a centralized acquisition component A5 of the corresponding port, the 12 th, 13 th, 14 th and 15 th ports are reserved ports, the 16 th and 17 th ports are respectively connected to an auxiliary ground network 104, the 18 th port is connected to a ground network A7, and the 19 th port is used for grounding of the external dc power supply.
Further, the first alarm component 403 sends an indication signal when the value of the ground resistance detected by the first ground resistance detecting device 105 is greater than a preset resistance threshold.
Specifically, the first alarm assembly 403 includes a sound generating mechanism 401 and an illumination mechanism 402, where the indication signals are an audio indication signal and an illumination indication signal.
Specifically, the sound generating mechanism 401 is a speaker, and the lighting mechanism 402 is an LED lamp.
Furthermore, the lighting mechanism further comprises a digital display unit, and the digital display unit can intuitively display the current grounding resistance value, so that the user can conveniently check the current grounding resistance value.
Specifically, referring to fig. 5, the second ground resistance detection device 203 also includes a first alarm component 403.
Specifically, the second ground resistance detection device 203 includes 4 connection ports, where the 51 st and 52 th ports are connected to an external dc power supply, and are used to supply power to the second ground resistance detection device 203, and the 53 st and 54 th ports are signal line connection ports.
In one embodiment, the 4 connection ports of the second ground resistance detection device 203 are provided with different colors, so as to facilitate differentiation.
Specifically, when the value of the ground resistance detected by the second ground resistance detecting device 203 is greater than the preset resistance threshold, the first alarm component 403 sends an indication signal.
Preferably, the first alarm assembly 403 includes a sound generating mechanism 401 and an illumination mechanism 402, and the indication signals are an audio indication signal and an illumination indication signal.
Preferably, the sound generating mechanism 401 is a speaker, and the lighting mechanism 402 is an LED lamp.
Further, the lighting mechanism 402 further includes a digital display unit, which can intuitively display the current grounding resistance value, so as to facilitate the user to check.
Referring to fig. 6, in a second aspect of the present invention, a building is provided, which includes a first safety monitoring system A1 and a second safety monitoring system A2, wherein the first safety monitoring system A1 includes a first circuit loop, the second safety monitoring system A2 includes a second circuit loop, and the first ground resistance detecting device 105, the first ground state monitoring device 102 and the ground network A7 form a first circuit loop; the second ground resistance detection device 203, the second ground state monitoring device 204, the ground device 202 and the ground network A7 form a second circuit loop, wherein the first circuit loop and the first centralized acquisition component 103 form a first safety monitoring system A1; the second circuit loop and the second centralized acquisition component 205 form a second safety monitoring system A2, the first safety monitoring system A1 is installed on an upper floor of the building, and the second safety monitoring system A2 is installed on other floors of the building.
Specifically, the first circuit loop is connected in series with the first centralized collection unit 103, the second circuit loop is connected in series with the second centralized collection unit 205, and the first safety monitoring system A1 and the second safety monitoring system A2 are connected in parallel. In this way, the circuit on-off of the first safety monitoring system A1 and the second safety monitoring system A2 cannot influence each other.
Specifically, when the first ground state monitoring device 102 monitors abnormal ground state data, the electrical connection of the first circuit loop is cut off.
Specifically, the number of the first grounding status monitoring devices 102 is n, where n is a positive integer greater than or equal to 1.
Specifically, when the number of the first ground state monitoring devices 102 is greater than 1, the plurality of first ground state monitoring devices 102 are connected in parallel, and are simultaneously connected in parallel with the first ground resistance detecting device 105, and the first ground resistance detecting device 105 and the ground net A7 respectively form a first circuit loop with the first ground state monitoring devices 102.
Specifically, when the value of the ground resistance detected by the first ground resistance detecting device 105 is greater than the preset resistance threshold, the first ground resistance detecting device 105 cuts off the electrical connection of the first safety monitoring system A1.
Specifically, the preset resistance threshold is 0-10 ohms. When the current ground resistance value detected by the first ground resistance detection device 105 is 11 ohms, the first ground resistance detection device 105 will automatically cut off the electrical connection of the first safety monitoring system A1, and when the current ground resistance value detected by the first ground resistance detection device 105 is 1 ohm, the first ground resistance detection device 105 does not perform any action, and the first safety monitoring system A1 works normally.
Further, when the second ground state monitoring device 204 monitors abnormal ground state data, the electrical connection of the second circuit loop is cut off.
Specifically, the number of the second grounding status monitoring devices 204 is m, where m is a positive integer greater than or equal to 1.
Specifically, when the number of the second ground state monitoring devices 204 is greater than 1, the plurality of second ground state monitoring devices 204 are connected in parallel, and are simultaneously connected in parallel with the second ground resistance detecting device 203, and the second ground resistance detecting device 203, the ground device 202, and the ground net A7 respectively form a second circuit loop with the second ground state monitoring devices 204.
Specifically, when the value of the ground resistance detected by the second ground resistance detecting device 203 is greater than the preset resistance threshold, the second ground resistance detecting device 203 cuts off the electrical connection of the second safety monitoring system A2.
Further, the first circuit loop and the second circuit loop are respectively connected in series with the centralized acquisition component A5.
Specifically, the first circuit loop is connected in series with the first centralized collection unit 103, and the second circuit loop is connected in series with the second centralized collection unit 205.
Further, the first centralized collection unit 103 and the second centralized collection unit 205 further comprise a second alarm assembly.
Further, when the first centralized collection unit 103 or the second centralized collection unit 205 collects abnormal grounding resistance values or abnormal grounding state information, the second alarm assembly will send out an alarm signal.
Further, the first ground resistance detection device 105 and the second ground resistance detection device 203 further comprise a first alarm component 403.
The working principle and the using flow of the invention are as follows:
according to the electricity consumption safety monitoring system and the building thereof, the ground resistance detection device A3, the ground state monitoring device A4 and the ground network A7 form the independent circuit loop, when the circuit loop is abnormal, the circuit loop is automatically powered off, so that the circuit state is automatically monitored, the uninterrupted monitoring circuit is achieved, the electricity consumption safety of the whole circuit of the building is protected once the abnormality occurs and the electricity consumption is immediately powered off; because the monitoring circuit is an independent circuit loop, the on-off of the circuit is not affected, the power failure of the whole building caused by abnormal connection at a certain point is avoided, and the maintenance cost is saved; and the circuit can be powered off as long as one of the grounding state and the grounding resistor is abnormal, so that the possibility of false alarm and missing alarm is effectively reduced, and a signal can be sent once the abnormality occurs, thereby helping a user to quickly find out the place where the fault occurs, greatly reducing the maintenance cost and simultaneously avoiding the occurrence of accidents such as fire, electric shock and the like caused by the abnormal grounding when overload or short-circuit protection is adopted.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the system is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the wireless terminal may refer to the corresponding process in the foregoing embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system/terminal device and connection manner may be implemented in other manners. For example, the system/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, systems or units, which may be in electrical, mechanical or other forms.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (8)
1. The utility model provides an electricity safety monitoring system, includes, earth mat, earth resistance detection device, earth state monitoring device, concentrated collection part and state monitoring terminal, earth resistance detection device and earth state monitoring device with earth mat series connection, earth resistance detection device and earth state monitoring device parallel connection, earth resistance detection device real-time detection circuit current ground resistance value, earth state monitoring device real-time monitoring current circuit's earth state information, concentrated collection part is used for gathering current circuit's ground resistance value and earth state information, and will earth resistance value and earth state information upload to state monitoring terminal, state monitoring terminal is used for storing earth resistance value and earth state information, its characterized in that: the grounding resistance detection device, the grounding state monitoring device and the grounding network form a circuit loop, when the grounding resistance value detected by the grounding resistance detection device is larger than a preset resistance threshold value, the grounding resistance detection device cuts off the electrical connection of the circuit loop,
the grounding resistance detection device comprises a first grounding resistance detection device and a second grounding resistance detection device, the centralized acquisition component comprises a first centralized acquisition component and a second centralized acquisition component, the grounding state monitoring device comprises a first grounding state monitoring device and a second grounding state monitoring device, the first grounding resistance detection device is directly connected with the grounding grid and two unconnected auxiliary grounding grids at the same time, the first grounding resistance detection device, the first grounding state monitoring device and the grounding grid form a first circuit loop, the first circuit loop is connected with the first centralized acquisition component in series, the second grounding resistance detection device is connected with the grounding grid through the grounding device, the second grounding resistance detection device, the second grounding state monitoring device and the grounding grid form a second circuit loop, the second circuit loop is connected with the second centralized acquisition component in series,
the first circuit loop and the first centralized acquisition component form a first safety monitoring system, the second circuit loop and the second centralized acquisition component form a second safety monitoring system, the first safety monitoring system is arranged on one layer of the ground of a building, the second safety monitoring system is arranged on more than one layer of the ground of the building, and the first safety monitoring system and the second safety monitoring system are connected in parallel.
2. An electrical safety monitoring system according to claim 1, wherein: the number of the first grounding state monitoring devices is n, n is a positive integer greater than or equal to 1, the number of the second grounding state monitoring devices is m, and m is a positive integer greater than or equal to 1.
3. An electrical safety monitoring system according to claim 1, wherein: the grounding device comprises a grounding row and/or a lightning protection ground wire.
4. An electrical safety monitoring system according to claim 1, wherein: the second grounding state monitoring device is connected with the grounding grid through an external device, and the external device comprises a distribution box, a grounding bar and electric equipment.
5. An electrical safety monitoring system according to claim 1, wherein: the grounding resistance detection device, the grounding state monitoring device, the centralized acquisition component and the state monitoring terminal further comprise wireless data transmission components, the grounding resistance detection device, the grounding state monitoring device and the centralized acquisition component are respectively connected, and the centralized acquisition component and the state monitoring terminal are connected through the wireless data transmission components to perform data transmission.
6. A building, characterized in that: comprising an electrical safety monitoring system as claimed in claim 1.
7. The building according to claim 6, wherein: and when the first grounding state monitoring device monitors the abnormal grounding state data, the electrical connection of the first circuit loop is cut off, and when the second grounding state monitoring device monitors the abnormal grounding state data, the electrical connection of the second circuit loop is cut off.
8. The building according to claim 6, wherein: when the grounding resistance value detected by the first grounding resistance detection device is larger than a preset resistance threshold, the first grounding resistance detection device cuts off the electric connection of the first safety monitoring system, and when the grounding resistance value detected by the second grounding resistance detection device is larger than the preset resistance threshold, the second grounding resistance detection device cuts off the electric connection of the second safety monitoring system.
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