CN115411836A - Power supply device and electric energy meter box - Google Patents
Power supply device and electric energy meter box Download PDFInfo
- Publication number
- CN115411836A CN115411836A CN202110583297.9A CN202110583297A CN115411836A CN 115411836 A CN115411836 A CN 115411836A CN 202110583297 A CN202110583297 A CN 202110583297A CN 115411836 A CN115411836 A CN 115411836A
- Authority
- CN
- China
- Prior art keywords
- short
- switch
- power supply
- circuit
- electric energy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
-
- 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
- H02H3/02—Details
- H02H3/027—Details with automatic disconnection after a predetermined time
-
- 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
- H02H3/08—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 responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a power supply device, which comprises at least one power supply wiring device and at least one switch with a short-circuit short-delay protection function, wherein a power supply module, an electronic controller and a communication module are arranged on the power supply wiring device, the electronic controller sends the comprehensive voltage and current electrical quantity information of the power supply wiring device or/and the comprehensive switch voltage and current electrical quantity information with the short-circuit short-delay protection function to at least one of a terminal, a master station and a manager through the communication module, and the invention also discloses an electric energy meter box with the power supply device.
Description
Technical Field
The invention belongs to the field of low-voltage power distribution, and particularly relates to a power supply device and an electric energy meter box with selective protection and control functions.
Background
Fig. 1-4 are schematic diagrams illustrating a wiring principle of an existing electric energy meter box, a power input end is single-phase 1P, 1p + n or three-phase 3P, 3p + n, the power input end is connected to a wire inlet end of a meter front switch 2, a wire outlet end of the meter front switch 2 is electrically connected to a wire inlet end of an electric energy meter 3, a wire outlet end of the electric energy meter 3 is electrically connected to a wire inlet end of a meter rear switch 4, and a wire outlet end of the meter rear switch 4 is connected to a load end.
The meter front switch in the multi-meter position electric energy meter box is fundamentally different from other power distribution systems: the wire at the outlet end of the front switch of the meter box is respectively output by a plurality of wires with small cross section area in parallel connection, so that the phenomenon of 'large switch and small wire' exists, and further a large-sized circuit breaker (such as 125A/160A/200A/250A) cannot protect the wire with small cross section area (such as 6-16 mm), the wire is burnt, and serious safety accidents are caused.
When the electric energy meter box is positioned at the nearest or farthest power supply distance (50-500 meters) of a transformer, if a short-circuit fault occurs to a wire between a post-meter switch and a pre-meter switch (the short-circuit current value is 400-1500A), the protection setting value of the pre-meter switch is 1000-2250A, if the short-circuit fault current is smaller than the setting value of a circuit breaker instantaneous release and the circuit breaker fails, the circuit breaker enters an overload long-delay protection stage, the 250A circuit breaker has the protection time of more than 2 minutes under the condition of 400A overload current, if the section of a copper wire connected to the electric energy meter is only 12mm, the copper wire with the section of 12mm can only bear about 21s of time under the current load of 400A, the wire cannot be damaged, and the wire can be burnt out beyond the time, so that a serious safety accident is caused.
Take the table front switch of 160A as an example: if the setting current value of the short-circuit instantaneous tripping of the switch In front of the meter is set to 10In and 1600A, the short-circuit protection of the breaker can be refused as long as the short-circuit current at the position of the meter box is less than 1600A. The circuit breaker only acts as a disconnector. With this configuration, adding a branch table front switch for each "small wire" branch is an effective solution to solve the aforementioned problems. However, this brings the problem of selective protection between the branch front switch and the back switch.
Whether the matching between the upper and lower circuit breakers is correct or not and whether the fault current is limited in the minimum range or not are related to the operation safety of the power distribution system, and are very important for preventing the system from being damaged, preventing the accident from being expanded and preventing the equipment from being damaged. This presents the problem of selectively protecting the cooperation between the branch front and back switches.
By selective protection is meant the coordination between the current-time action characteristics between two or more stages of circuit breakers in a power distribution system, when an overcurrent fault occurs within a given range, only the circuit breaker that is active within that range is active, while the circuit breakers of the other stages are inactive, thereby keeping the number of loads affected by the fault to a minimum. The different factors can change the resistance value of the loop, and the change of the resistance value can change the short-circuit current value, so that the short-circuit current of each station is different. Therefore, the design of the circuit breaker level difference matching scheme of the power distribution system has not been solved well because the above factors are changed too much.
In addition, the conventional power equipment is low in metering precision and high in difficulty in fault reason analysis, and power is cut off in a large range when maintenance and repair are carried out, so that electricity consumption of residents and industrial production is seriously influenced, and inconvenience is brought to users.
Disclosure of Invention
In order to solve at least one of the problems, the invention provides a power supply device and an electric energy meter box, which realize high-precision metering, subsection line loss analysis and fault on-site study and judgment by combining a power supply wiring device and a switch with a short-circuit short-delay protection function, realize short-circuit short-delay protection driven by a short-circuit short-delay release of the switch with the short-circuit short-delay protection function and short-circuit instant protection driven by an instant release of a switch behind a meter, realize overcurrent selective protection between the switch with the short-circuit short-delay protection function and the switch behind the meter, and lock the fault range to the fault minimum range.
The invention is realized by the following technical scheme:
on one hand, the invention provides a power supply device, which comprises at least one power supply wiring device and at least one switch with a short-circuit short-delay protection function, wherein a lead-out end conductor of the power supply wiring device is connected with the switch with the short-circuit short-delay protection function, a lead-in end of the power supply wiring device is connected with a power supply lead, the power supply wiring device is provided with a power supply module, an electronic controller and a communication module, a current collector is arranged in the power supply wiring device or/and the switch with the short-circuit short-delay protection function, and the electronic controller sends the comprehensive voltage and current electric quantity information of the power supply wiring device or/and the comprehensive switch with the short-circuit short-delay protection function electric quantity information of the voltage and the current to at least one of a terminal, a master station and a manager through the communication module.
Preferably, any one of the switches with the short-circuit short-delay protection function is in signal connection with the power connection device, the power connection device integrates the electrical quantity information of voltage and current and the change of the connection signal of the switch with the short-circuit short-delay protection function to perform fault study and judgment, and the electronic controller transmits fault tripping information to at least one of the station area terminal, the master station and the manager through the communication module.
Preferably, the switch with the short-circuit short-delay protection function is provided with a short-circuit short-delay release.
Preferably, the short-circuit short-delay release is an electromagnetic release with a long idle stroke.
Preferably, the electromagnetic release comprises at least a movable iron core and a resistance return elastic component.
Preferably, the electromagnetic trip comprises at least one freely movable iron core.
Preferably, the short circuit short delay release comprises an electronic delay circuit and a release actuator.
Preferably, the switch with the short-circuit short-delay protection function is a single-phase 1P, 1p + n,2P switch or a three-phase 3P, 3p + n,4P switch suitable for an alternating-current power supply system.
Preferably, the communication mode adopted by the communication module 6 includes a wireless communication mode and/or a wired communication mode, the wireless communication mode includes at least one of 4G, 5G, WIFI, BLE, zigBee, NB-IoTLoRa communication modes, and the wired communication mode includes at least one of HPLC, PLC, RS485, LAN, CAN, and Profibus communication modes.
Preferably, a voltage collector is further arranged on the power supply wiring device, the current collector and the voltage collector send collected current and voltage information to the electronic controller, and the electronic controller processes the information to obtain an electric quantity metering value.
Preferably, the power supply wiring device is further provided with a temperature collector, the temperature collector sends collected temperature data to the electronic controller, and the electronic controller compares the temperature data with a preset temperature threshold value and judges whether temperature protection is carried out.
On the other hand, the invention also provides an electric energy meter box, which comprises the power supply device, a box body, at least one electric energy meter, at least one meter rear switch, a first insulating lead connected with the electric energy meter and the switch with the short-circuit short-delay protection function, and a second insulating lead connected with the electric energy meter and the meter rear switch, wherein the meter rear switch is provided with a short-circuit instantaneous release for executing short-circuit instantaneous protection, when the meter rear switch and the switch on the same branch circuit have short-circuit faults at the load end of the meter rear switch, the switch with the short-circuit short-delay protection function and the meter rear switch realize selective protection, namely the meter rear switch is released, and the switch with the short-circuit short-delay protection function is not released.
Preferably, the switch with the short-circuit short-delay protection function is electrically connected to an incoming line end of the electric energy meter, the meter rear switch is electrically connected to an outgoing line end of the electric energy meter, and the switch with the short-circuit short-delay protection function, the meter rear switch and the electric energy meter are all installed in the box body. The invention has the following beneficial effects:
1. the electric energy meter box system comprises a switch with a short-circuit short-delay protection function and a meter back switch two-stage protection element, and realizes overcurrent selective protection between the switch with the short-circuit short-delay protection function and the meter back switch through short-circuit short-delay protection driven by a short-circuit short-delay release of the switch with the short-circuit short-delay protection function and short-circuit instant protection driven by an instant release of the meter back switch. And locking the fault range to the fault minimum range to prevent the accident from being expanded. Namely, the overcurrent fault of the switch load end behind the meter is protected by the switch behind the meter, and the overcurrent fault of the line between the switch load end with the short-circuit short-delay protection function and the wire inlet end of the switch behind the meter is protected by the switch with the short-circuit short-delay protection function.
2. This electric energy meter box system, based on the system angle consideration, retrench, merge low pressure product, the respective inside components and parts of equipment, make the used low pressure product of system, the inside components and parts total number that uses of equipment obtain retrench, merge and reduce, further save the single item cost of low pressure product, equipment separately, practice thrift inside occupation space, improve inside electronic components and parts environmental friendliness, improve the electromagnetic compatibility performance, reduce inside temperature rise, increase of service life.
3. The electronic controller and the communication module in the electric energy meter box system have plug-in replacement functions, and the requirement on electric quantity metering precision is still met after replacement; meanwhile, the problem of service life matching of electronic component parts and mechanical structure parts is solved; need not to pull down the insulating base module of connecting once electrically conductive return circuit, guarantee the power supply continuity, reduce maintenance equipment cost and cost of labor.
4. The electronic controller in the electric energy meter box system has a power output function, provides additional stable power supply for the protection device/equipment/device connected to the single-phase cable on the side of the outlet end when the short-circuit voltage is reduced, and therefore the protection device/equipment/device connected to the single-phase cable on the side of the outlet end does not need to be provided with a current self-generating power supply device.
5. The electric energy meter box system can realize the monitoring of current, voltage, earth fault current and temperature equivalent, and simultaneously has the functions of metering, automatic physical topology support, metering misalignment, suspected electricity stealing alarm, on-site fault study and judgment, active reporting, HPLC communication, wireless communication, RS485 communication, line loss analysis support and the like.
6. The combination of the power supply wiring device 1 and the switch 2 with the short-circuit short-delay protection function can meet the requirements of upgrading of a fine-quality platform area, an intelligent platform area and a ubiquitous Internet of things platform area, and has intelligent functions such as high-precision metering, sectional line loss analysis, suspected electricity stealing analysis, fault on-site study and judgment and the like; the refinement degree of line protection can be improved, and the height of independent selective protection level of each branch is increased; in maintenance and repair, only the branch where the fault is located is stopped, so that the requirement of isolation and repair can be met, and the influence range of power failure can be reduced; the structure combination mode is flexible, the requirements of a newly-built scene can be met, and the scene requirements of old equipment reformation with complex and complicated varieties can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a first schematic diagram of a conventional electric energy meter box wiring;
FIG. 2 is a second schematic diagram of a conventional electric energy meter box;
FIG. 3 is a third schematic diagram of the conventional electric energy meter box wiring;
FIG. 4 is a fourth schematic diagram of a conventional electric energy meter box;
FIG. 5 is a schematic structural diagram of the electric energy meter box of the present invention;
FIG. 6 is a schematic view of a power wiring device of the electric energy meter box of the present invention;
FIG. 7 is a schematic view of a long-idle-stroke electromagnetic trip of the electric energy meter box of the present invention;
FIG. 8 is a schematic structural diagram of an electronic short-circuit short-delay trip mechanism of an electric energy meter box according to the present invention;
FIG. 9 is a schematic diagram of the wiring mode of the switch of the electric energy meter box of the invention as 1P + N, 2P;
FIG. 10 is a schematic diagram of a 3P connection mode of the switch of the electric energy meter box of the invention;
FIG. 11 is a schematic diagram of the wiring mode of the switch of the electric energy meter box of the invention at 3P + N, 4P;
FIG. 12 is a first schematic diagram of the electrical energy meter box wiring of the present invention;
fig. 13 is a second schematic diagram of the wiring of the electric energy meter box of the invention.
Detailed Description
In order to make the purpose and technical solution of the present invention clearer, the following describes an embodiment of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 5 and fig. 6, this embodiment discloses a power supply device, which includes at least one power connection device 1 and at least one switch 2 with short-circuit short-delay protection function, a lead-out end conductor of the power connection device 1 is connected to the switch 2 with short-circuit short-delay protection function, a lead-in end of the power connection device 1 is connected to a power lead, the power connection device 1 is provided with a power module 1-1, an electronic controller 11 and a communication module 6, a current collector 12 is provided in the power connection device 1, the electronic controller 11 sends electrical quantity information of the integrated voltage and current of the power connection device to at least one of a terminal, a master station and a manager through the communication module 6, in other embodiments, a current collector 12 may also be provided in the switch 2 with short-circuit short-delay protection function, correspondingly, the electronic controller 11 sends the electrical quantity information of the integrated voltage and current of the switch 2 with short-delay protection function to at least one of a terminal, a trip and a manager through the communication module 6, any one switch 2 with short-circuit short-delay protection function is connected to the power connection device 1, the electrical quantity information of the short-circuit short-delay protection switch 1 is transmitted to the short-circuit short-delay protection device through the communication module 11.
The combination of the power supply wiring device 1 and the switch 2 with the short-circuit short-delay protection function can meet the upgrading requirements of a fine-quality platform area, an intelligent platform area and a ubiquitous Internet of things platform area, and has the intelligent functions of high-precision metering, sectional line loss analysis, suspected electricity stealing analysis, fault on-site study and judgment and the like; the refinement degree of the line protection can be improved, and the height of the independent selective protection level of each branch is increased; in maintenance and repair, only the branch where the fault is located is stopped, so that the requirement of isolation and repair can be met, and the influence range of power failure can be reduced; the structure combination mode is flexible, the requirements of a newly-built scene can be met, and the scene requirements of old equipment reformation with complex and complicated varieties can be met.
Furthermore, the signal connection is a signal connection line of the power supply wiring device 1 and is connected to the outlet terminal of the switch 2 with the short-circuit short-delay protection function or the corresponding position; the signal connection can also be wireless connection, and the power supply wiring device 1 receives potential wireless signals on the outlet terminal of the switch 2 with the short-circuit short-delay protection function or at the corresponding position.
The current collector 12 outputs a current signal in a linear relationship and the same phase with the main circuit current within a rated range, and has resolution capability of ten milliampere grades; the current collector 12 adopts at least one of a current transformer, a current divider, a hall current sensor, a fluxgate current sensor, a rogowski coil, a reluctance current sensor and an optical fiber current sensor.
The communication mode adopted by the communication module 6 comprises a wireless communication mode and/or a wired communication mode, and the wireless communication mode comprises at least one of 4G, 5G, WIFI, BLE, zigBee, NB-IoT and LoRa communication modes; the wired communication comprises at least one of HPLC, PLC, RS485, LAN, CAN and Profibus communication modes.
The switch 2 with the short-circuit short-delay protection function and the power supply wiring device 1 are provided or configured with a function of measuring the electric quantity, so that the switch 2 with the short-circuit short-delay protection function and the power supply wiring device 1 can obtain the electric quantity information of voltage and current.
The electric quantity metering function is realized in the following mode: the switch 2 with the short-circuit short-delay protection function and/or the power supply wiring device 1 comprise a current collector 12 and a voltage collector, wherein the current collector 12 provides a current signal for the current signal sampling circuit of the electronic controller 11, the voltage signal collected by the voltage collector provides the voltage signal sampling circuit of the electronic controller 11, and the power supply module of the electronic controller 11 adopts a voltage power supply circuit or can adopt external input. The current signal sampling circuit of the electronic controller 11 and the voltage signal sampling circuit of the electronic controller 11 further send the processed signals to the microprocessor of the electronic controller 11, and the electrical quantity measuring values, such as data of current, voltage, power, electricity quantity, harmonic wave, etc., are obtained after the signals are processed by the microprocessor of the electronic controller 11. The processed electrical quantity metering data is further transmitted to a local display unit, such as a liquid crystal display. And/or transmitted to the communication module 6, and further uploaded to a device such as a platform terminal and a master station through the processing of the communication module 6 to perform service applications such as edge calculation processing and other analysis processing.
The switch 2 with the short-circuit short-delay protection function and the power supply wiring device 1 are provided or configured with a function of monitoring temperature.
The realization mode of the temperature monitoring function is as follows: the switch 2 with the short-circuit short-delay protection function and/or the power supply wiring device 1 further comprise a temperature collector, the temperature collector can generate a temperature signal, and the microprocessor of the electronic controller 11 generates a temperature monitoring information and an overtemperature protection instruction according to internal firmware and the temperature signal. The temperature collector is one of a thermocouple, a thermistor, a platinum resistor and a temperature IC, and the temperature collector collects the temperature of at least one position in the vicinity of the power supply wiring device, the switch wire inlet end, the switch wire outlet end and the internal key electrical contact point. The microprocessor of the electronic controller 11 compares the internal firmware thereof with a preset temperature early warning/protection threshold value to determine whether to perform temperature early warning/protection. If the temperature is early-warned, transmitting early-warning information to a local human-computer interaction module for local temperature early warning and display and/or transmitting the early-warning information to the communication module for remote temperature early warning; and if the temperature protection is carried out, a driving circuit of the electronic controller is driven, and when the driving circuit finally controls a signal, a magnetic flux converter in a driving switch acts and further the switch is tripped, so that the breaking of a main circuit is realized, and the corresponding over-temperature action protection function is realized.
The switch 2 with the short-circuit short-delay protection function and the power supply wiring device 1 are provided or configured with a function of residual current monitoring or protection.
The implementation mode of the residual current monitoring function is as follows: the current collector 12 is configured to have a residual current transformer, provides a residual current signal to a residual current signal sampling circuit of the electronic controller 11, and the voltage signal collected by the voltage collector is provided to a voltage signal sampling circuit of the electronic controller 11, and the power module of the electronic controller 11 uses a voltage power supply circuit or external input. The residual current signal sampling circuit of the electronic controller 11 further sends the processed signal to the microprocessor of the electronic controller, and after the signal is processed by the microprocessor of the electronic controller 11, a residual current monitoring value is obtained for residual current monitoring and further can be used in application scenes such as electric power fire monitoring and residual current protection.
The electronic controller 11 has a fault trip reason research and judgment function: the current collector provides a current signal for the current signal sampling circuit of the electronic controller 11, wherein the current signal sampling circuit comprises a secondary current signal and a secondary duty ratio signal, the voltage signal collected by the voltage collector is provided for the voltage signal sampling circuit of the electronic controller 11, and the electric energy of the power module of the electronic controller 11 adopts a voltage power circuit or can adopt external input. The rated range of the current collector is generally 1.2 times that of the switch, so that an output current signal within the rated range and an output current signal with a certain duty cycle characteristic after saturation exist, the current signal is transmitted to a current signal sampling circuit to carry out sampling processing on an analog signal, an output current signal is further generated, the output current signal is further transmitted to a signal processing circuit, and then is further transmitted to the electronic controller 11; meanwhile, the potential value of the outlet end of the switch 2 with the short-circuit short-delay protection function is sampled and processed and then transmitted to the electronic controller 11, the current signal, the potential signal and the real-time change condition thereof obtained by the electronic controller 11 are synthesized to obtain whether a fault event exists, and the processed events are further transmitted to a local display unit, such as a liquid crystal display. And/or the data is transmitted to the communication module, and is further uploaded to equipment such as a station terminal and a master station through the processing of the communication module 6 to perform service applications such as edge calculation processing and other analysis processing.
The short-circuit short-delay release of the switch 2 with the short-circuit short-delay protection function in this embodiment is an electromagnetic release with a long idle stroke, as shown in fig. 7, the electromagnetic release includes a base, a coil, a free moving iron core 21, a moving iron core 22, a push rod 25, and a resistance reset elastic component, where the resistance reset elastic component includes a first elastic component 23 and a second elastic component 24, the moving iron core 22 and the push rod 25 are integrally or fixedly disposed, the free moving iron core 21 is a hollow rod-shaped structure, the free moving iron core 21 is slidably sleeved on the push rod 25, the free moving iron core 22 includes a first iron core portion and a second iron core portion with different diameters, the diameter of the second iron core portion is larger than that of the first iron core portion, a step is formed between the first iron core portion and the second iron core portion, the second elastic component 24 is sleeved outside the push rod 25 and the free moving iron core 22, one end of the second elastic component abuts on the base, the other end of the second elastic component abuts on the step, the first elastic component 23 is sleeved on the push rod 25, one end of the free moving iron core 22 abuts on the push rod, and the other end of the moving iron core 22 abuts on the step. When the fault current reaches a preset value, the free movable iron core 21 overcomes the resistance of the first elastic piece 24 to move, after the free movable iron core 21 moves, the resistance of the second elastic piece 23 to the movable iron core 22 becomes small, the movable iron core 22 drives the ejector rod 25 to move forwards, after the free movable iron core 21 moves for a certain distance, the resistance of the first elastic piece 24 becomes large, so that the movement speeds of the movable iron core 22 and the ejector rod 25 become relatively small, the movement speeds of the movable iron core 22 and the ejector rod 25 within a certain current range are delayed, and the delay effect is achieved; when the time of the fault current is short and the tripping rod of the electromagnetic trip moves to the tripping position, the movable iron core 22 returns to the original position under the action of the restoring force of the second elastic piece 23, the product is not tripped, the tripping of the switch 4 behind the meter is realized, and the tripping of the switch 2 with the short-circuit short-delay protection function is not tripped.
In another embodiment, as shown in fig. 8, the short-circuit short-delay release of the present invention includes an electronic delay circuit 26 and a release actuator 27, when the fault current reaches a preset value, the electronic delay circuit 26 is activated, and when a specified time is reached, the electronic delay circuit 26 sends a release signal to the release actuator 27 to release, so as to release the short-circuit short-delay release; when the fault current does not reach the predetermined time, the electronic delay circuit 26 does not transmit the trip signal, the trip actuator 27 does not receive the signal, and the trip processing is not performed. The short-circuit short-delay protection of the short-circuit short-delay release under a certain current is realized by the short-circuit short-delay release.
In order to realize the configuration and use of various power supply systems, the switch 2 with the short-circuit short-delay protection function in the electric energy meter box system can be suitable for single-phase 1P, 1p + n and 2P switches in an alternating current power supply system, as shown in fig. 9, or suitable for three-phase 3P switches in the alternating current power supply system, as shown in fig. 10, or suitable for 3p + n and 4P switches in the alternating current power supply system, as shown in fig. 11.
Please refer to fig. 5 and fig. 6, this embodiment further provides an electric energy meter box 100, where the electric energy meter box 100 includes the power supply device, a box 10, at least one electric energy meter 3, and at least one meter rear switch 4, the power supply wiring device 1 is disposed at an inlet end of the electric energy meter box, the switch 2 is connected to the power supply wiring device 1 through a third insulated wire 7, the switch 2 is connected to an inlet end of the electric energy meter 3 through a first insulated wire 8, the meter rear switch 4 is connected to an outlet end of the electric energy meter 3 through a second insulated wire 9, the meter rear switch 4 is connected to a load end of the meter rear switch 4 through a wire, an electronic controller 11 is disposed on the power supply wiring device 1, the communication module 6 is disposed on the electronic controller 11, communication modules are disposed on the electric energy meter 3 and the switch 2 and are used for performing communication connection with the electronic controller, and the power supply wiring device 1, the switch 2, the electric energy meter 3, and the meter rear switch 4 are all disposed in the box 10.
Further, be equipped with short-circuit short-delay release on the switch 2 of taking short-circuit short-delay protect function, when on same branch circuit behind the table switch 4 with switch 2 of taking short-circuit short-delay protect function is in when the short-circuit fault takes place for the load end of switch 4 behind the table, switch 2 is selective protection with switch 4 behind the table, promptly switch 4 behind the table trips, switch 2 does not trip, electronic controller 11 passes through communication module 6 is to at least one transmission trouble dropout information in platform district, main website, the administrator.
Further, the meter back switch 4 is provided with a short-circuit instantaneous release for short-circuit instantaneous protection, in the same branch, when the load end of the meter back switch 4 has a short-circuit fault, the meter back switch 4 executes short-circuit instantaneous protection tripping, the switch 2 performs short-circuit short-delay protection non-tripping, the switch 2 does not trip under the protection action of the short-circuit short-delay release, the tripping time of the short-circuit short-delay release is longer than that of the short-circuit instantaneous release, so that large-scale power failure is avoided, the fault range is locked to the fault minimum range, and the accident is prevented from being enlarged.
Fig. 12 and 13 are schematic diagrams of the wiring of the electric energy meter box of the present invention, a power input end of the electric energy meter box in fig. 5 is three-phase, 3p + n, a power input end of the electric energy meter box in fig. 6 is three-phase, the power input end is connected to a wire inlet end of the power wiring device 1, a wire inlet end of the switch 2 with short-circuit short-delay protection function is connected to the power wiring device 1, a wire outlet end of the switch 2 with short-circuit short-delay protection function is electrically connected to a wire inlet end of the electric energy meter 3, a wire outlet end of the electric energy meter 3 is electrically connected to a wire inlet end of the switch 4 behind the meter, and a wire outlet end of the switch behind the meter is connected to a load end.
The electric energy meter box can realize the monitoring of current, voltage, earth fault current and temperature equivalent, and has the functions of measurement, automatic physical topology support, measurement misalignment, suspected electricity stealing alarm, on-site fault study and judgment, active reporting, HPLC communication, wireless communication, RS485 communication, line loss analysis support and the like.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (13)
1. A power supply device is characterized by comprising at least one power supply wiring device (1), at least one switch (2) with short circuit short time delay protection function,
the conductor at the outlet end of the power supply wiring device (1) is connected with the switch (2) with the short-circuit short-time delay protection function, the inlet end of the power supply wiring device (1) is connected with a power supply lead,
be provided with power module (1-1), electronic controller (11) and communication module (6) on power termination (1), in power termination (1) or/and be provided with electric current collector (12) in taking short circuit short time delay protect function's switch (2), electronic controller (11) will power termination (1) synthesize the electric quantity information of voltage, electric current or/and take short circuit short time delay protect function's switch (2) to synthesize the electric quantity information of voltage, electric current and pass through communication module (6) are sent for at least one in terminal, main website, the administrator.
2. The power supply device according to claim 1, wherein any one of the switches (2) with short-circuit and short-delay protection functions is in signal connection with the power connection device (1), the power connection device (1) integrates electrical quantity information of voltage and current, and changes of the connection signal of the switch (2) with short-circuit and short-delay protection function are used for fault study, and the electronic controller transmits fault tripping information to at least one of a platform area terminal, a main station and a manager through the communication module.
3. The power supply device according to claim 1, wherein the switch (2) with short-circuit short-delay protection function is provided with a short-circuit short-delay release.
4. The power supply apparatus of claim 3, wherein the short circuit short delay release is an electromagnetic release having a long backlash.
5. The power supply device according to claim 4, characterized in that said electromagnetic release comprises at least a plunger (22) and a resistive return spring assembly.
6. Power supply device according to claim 4, characterized in that the electromagnetic release comprises at least one freely movable plunger (21).
7. The power supply apparatus of claim 3, wherein the short delay trip comprises an electronic delay circuit and a trip actuator.
8. The power supply device according to claim 1, wherein the switch (2) with short-circuit short-delay protection function is a single-phase 1P, 1p + n,2P switch or a three-phase 3P, 3p + n,4P switch suitable for use in an ac power supply system.
9. The power supply device according to claim 1, wherein the communication mode adopted by the communication module (6) comprises wireless communication and/or wired communication mode, the wireless communication comprises at least one of 4G, 5G, WIFI, BLE, zigBee and NB-IoTLoRa communication mode, and the wired communication comprises at least one of HPLC, PLC, RS485, LAN, CAN and Profibus communication mode.
10. The power supply device according to claim 1, wherein a voltage collector is further arranged on the power supply wiring device (1), the current collector (12) and the voltage collector send collected current and voltage information to the electronic controller (11), and the electronic controller (11) processes the collected current and voltage information to obtain an electrical quantity metering value.
11. The power supply device according to claim 1, wherein a temperature collector is further arranged on the power supply wiring device (1), the temperature collector sends collected temperature data to the electronic controller (11), and the electronic controller (11) compares the temperature data with a preset temperature threshold value to judge whether temperature protection is performed or not.
12. An electric energy meter box is characterized by comprising a power supply device, a box body (10), at least one electric energy meter (3), at least one meter rear switch (4), a first insulating lead for connecting the electric energy meter (3) and the switch (2) with the short-circuit short-delay protection function, and a second insulating lead for connecting the electric energy meter (3) and the meter rear switch (4), wherein the meter rear switch (4) is provided with a short-circuit instantaneous release for executing short-circuit instantaneous protection, when the meter rear switch (4) and the switch (2) on the same branch have a short-circuit fault at a load end of the meter rear switch, the switch (2) with the short-circuit short-delay protection function and the meter rear switch (4) realize selective protection, namely the meter rear switch (4) is released, and the switch (2) with the short-circuit short-delay protection function is not released.
13. The electric energy meter box according to claim 12, characterized in that the switch (2) with short-circuit short-delay protection function is electrically connected to the incoming line end of the electric energy meter (3), the meter back switch (4) is electrically connected to the outgoing line end of the electric energy meter (3), and the switch (2) with short-circuit short-delay protection function, the meter back switch (4) and the electric energy meter (3) are all installed in the box body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110583297.9A CN115411836A (en) | 2021-05-27 | 2021-05-27 | Power supply device and electric energy meter box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110583297.9A CN115411836A (en) | 2021-05-27 | 2021-05-27 | Power supply device and electric energy meter box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115411836A true CN115411836A (en) | 2022-11-29 |
Family
ID=84155115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110583297.9A Pending CN115411836A (en) | 2021-05-27 | 2021-05-27 | Power supply device and electric energy meter box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115411836A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11740265B1 (en) * | 2022-06-09 | 2023-08-29 | Accuenergy (Canada) Inc. | Signal conditioning circuit |
-
2021
- 2021-05-27 CN CN202110583297.9A patent/CN115411836A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11740265B1 (en) * | 2022-06-09 | 2023-08-29 | Accuenergy (Canada) Inc. | Signal conditioning circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108512202B (en) | Circuit breaker suitable for intelligent power grid user side and protection method thereof | |
| CN215300162U (en) | Low-voltage transformer area load uninterrupted switching system | |
| CN115411836A (en) | Power supply device and electric energy meter box | |
| CN211629005U (en) | Circuit fault detection module integrated in circuit breaker | |
| EP4010954B1 (en) | Power distribution lateral protection system and method | |
| CN203242926U (en) | Low-voltage power distribution cabinet with residual current protection function | |
| CN208142825U (en) | High-voltage bus rapid protection device | |
| CN103580007A (en) | Intelligent frame controller | |
| Hibatullah et al. | Monitoring of Protection System for Overvoltage Faults in Distribution Networks | |
| CN103151196B (en) | State indicating instrument of three-working-position operating mechanism of high-voltage switch cabinet and state indicating method thereof | |
| CN203761036U (en) | Line protection device | |
| CN109802377A (en) | A kind of transfevent ground connection arc-extinction device | |
| CN112735924A (en) | Intelligent circuit breaker | |
| CN210957782U (en) | 35kV transformer substation sectional bus system based on mixed superconducting current limiter | |
| CN111293675A (en) | Fusion type power transmission line fault isolation device | |
| CN219017554U (en) | Intelligent monitoring circuit breaker | |
| CN204905742U (en) | Middling pressure looped netowrk vacuum circuit breaker cabinet | |
| CN221125853U (en) | Multi-protection intelligent circuit breaker | |
| CN215528345U (en) | Intelligent distribution box | |
| CN214313030U (en) | Intelligent pole-mounted vacuum circuit breaker for transformation and upgrading | |
| CN202930911U (en) | Large current centralized leakage protection device | |
| CN219554656U (en) | Maintenance power distribution optimizing equipment | |
| CN212808450U (en) | Integrated electric energy metering equipment | |
| CN220253822U (en) | Automatic reclosing alternating current photovoltaic grid-connected cabinet | |
| RU2189680C2 (en) | Factory-assembled switch gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |