CN112578319A - Low-voltage distribution cabinet equipment line connection point monitoring alarm device - Google Patents
Low-voltage distribution cabinet equipment line connection point monitoring alarm device Download PDFInfo
- Publication number
- CN112578319A CN112578319A CN202110035141.7A CN202110035141A CN112578319A CN 112578319 A CN112578319 A CN 112578319A CN 202110035141 A CN202110035141 A CN 202110035141A CN 112578319 A CN112578319 A CN 112578319A
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- Prior art keywords
- line
- voltage
- wire
- distribution cabinet
- low
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention belongs to the technical field of power supply equipment, and particularly relates to a monitoring and alarming device for a line connection point of low-voltage power distribution cabinet equipment, which comprises an A line, a B line, a C line and a grounding line O line forming a three-phase power line, and is characterized in that: the voltage sampling transformers are respectively connected with the wire inlet and the wire outlet of the A wire, the B wire and the C wire, the voltage sampling transformers are connected with the voltage dividing resistors, the two voltage dividing resistors connected to the same-phase power line are respectively connected with a voltage sampling comparison analysis circuit, the voltage sampling comparison analysis circuit is connected with a programming chip, and the programming chip is connected with the wireless signal transmitter through a plug-in GSM transmitting module. The invention has the beneficial effects that: the contact and the line connection point of distribution switch in the ability effective monitoring low-voltage distribution cabinet constantly cause because of ageing, oxidation, overflowing etc. generate heat, burn out the phenomenon, report to the police and transmit information before not causing more serious accident, inform the staff in time to maintain, avoided causing the emergence of power failure accident.
Description
(I) technical field
The invention belongs to the technical field of power supply equipment, and particularly relates to a monitoring and alarming device for a line connection point of low-voltage power distribution cabinet equipment.
(II) background of the invention
The low-voltage power supply distribution cabinet matched with a 10KV power distribution transformer for a power supply system in China is arranged at the foremost end of a power supply line, various distribution equipment switches and monitoring instruments are arranged in the low-voltage power supply distribution cabinet, the low-voltage power supply distribution cabinet is a master control junction for supplying power energy to various users through a low-voltage line, a large number of connecting circuits and control switches are arranged in the low-voltage power supply distribution cabinet, nodes are large, and after the low-voltage power supply distribution cabinet runs for a period of time, overcurrent, aging and oxidation phenomena are easily caused, the problems that a single-phase line or a multi-phase line is burnt out of a contact and a. The system consumes manpower and material resources, influences the normal power supply of the line and causes certain loss for users.
Disclosure of the invention
In order to make up for the defects of the prior art, the invention provides the monitoring and alarming device for the line connection point of the low-voltage power distribution cabinet equipment, which has stable performance, low manufacturing cost and convenient installation.
The invention is realized by the following technical scheme:
the utility model provides a low-voltage distribution cabinet equipment line connection point monitoring alarm device, is including A line, B line, C line and the earth connection O line that constitutes the three-phase power cord, characterized by: the voltage sampling transformers are respectively connected with the wire inlet and the wire outlet of the A wire, the B wire and the C wire, the voltage sampling transformers are connected with the voltage dividing resistors, the two voltage dividing resistors connected to the same-phase power line are respectively connected with a voltage sampling comparison analysis circuit, the voltage sampling comparison analysis circuit is connected with a programming chip, and the programming chip is connected with the wireless signal transmitter through a plug-in GSM transmitting module.
Furthermore, the programming chip is connected with an alarm through an alarm circuit.
Furthermore, the programming chip is connected with current limiting resistors respectively corresponding to the line A, the line B and the line C, and each current limiting resistor is connected with a light-emitting indicating tube.
Furthermore, a time delay circuit is connected between the voltage sampling comparison analysis circuit and the programming chip.
Furthermore, a power supply rectifier bridge and a filter capacitor are sequentially connected between the voltage sampling transformer and the voltage dividing resistor.
Furthermore, a circuit working power transformer is connected to the C line inlet, the circuit working power transformer is connected with a power voltage stabilizing circuit, and the power voltage stabilizing circuit is connected with a standby battery pack.
Furthermore, two filter capacitors are connected between the circuit working power transformer and the power voltage stabilizing circuit.
Furthermore, power input wiring points are respectively arranged at the wire inlets of the A wire, the B wire and the C wire, power output wiring points are respectively arranged at the wire outlets of the A wire, the B wire and the C wire, and a circuit breaker contact is arranged between the wire inlets and the wire outlets of the A wire, the B wire and the C wire.
The invention has the beneficial effects that: the contact and the line connection point of the distribution switch in the low-voltage power distribution cabinet can be effectively monitored at any time, the phenomena of heating and burning caused by aging, oxidation, overcurrent and the like are avoided, more serious alarm and information transmission are carried out before accidents are avoided, workers are informed of timely maintenance, and the power failure accident is avoided. Simple structure, low in cost, installation convenient operation has reduced bigger loss, has improved the power supply reliability.
(IV) description of the drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the circuit principle of the present invention;
in the figure, a line 1A, a line 2B, a line 3C, a line 4 grounding wire O, a voltage sampling transformer 5, a voltage dividing resistor 6, a voltage sampling contrast analysis circuit 7, a programming chip 8, a 9-card GSM transmitting module, a wireless signal transmitter 10, an alarm circuit 11, an alarm 12, a current limiting resistor 13, a light emitting indicator tube 14, a time delay circuit 15, a power supply rectifier bridge 16, a filter capacitor 17, a circuit 18 working power supply transformer, a power supply voltage stabilizing circuit 19, a standby battery pack 20, a power supply input connection point 21, a power supply output connection point 22 and a circuit 23 disconnection switch contact.
(V) detailed description of the preferred embodiments
The attached drawing is an embodiment of the invention. The embodiment comprises an A line 1, a B line 2, a C line 3 and a grounding line O line 4 which form a three-phase power line, wherein the inlet and the outlet of the A line 1, the B line 2 and the C line 3 are respectively connected with a voltage sampling transformer 5, the voltage sampling transformer 5 is connected with a voltage dividing resistor 6, two voltage dividing resistors 6 connected to the same-phase power line are respectively connected with a voltage sampling comparison analysis circuit 7, the voltage sampling comparison analysis circuit 7 is connected with a programming chip 8, and the programming chip 8 is connected with a wireless signal transmitter 10 through a plug-in card GSM transmitting module 9. The programming chip 8 is connected with an alarm 12 through an alarm circuit 11. The programming chip 8 is connected with current limiting resistors 13 respectively corresponding to the line A1, the line B2 and the line C3, and each current limiting resistor 13 is connected with a light-emitting indicator tube 14. And a time delay circuit 15 is connected between the voltage sampling comparison analysis circuit 7 and the programming chip 8. A power supply rectifier bridge 16 and a filter capacitor 17 are sequentially connected between the voltage sampling transformer 5 and the divider resistor 6. The inlet of the C line 3 is connected with a circuit working power transformer 18, the circuit working power transformer 18 is connected with a power supply voltage stabilizing circuit 19, and the power supply voltage stabilizing circuit 19 is connected with a standby battery pack 20. Two filter capacitors 17 are connected between the circuit working power transformer 18 and the power supply voltage stabilizing circuit 19. The wire inlets of the A wire 1, the B wire 2 and the C wire 3 are respectively provided with a power input wiring point 21, the wire outlets of the A wire 1, the B wire 2 and the C wire 3 are respectively provided with a power output wiring point 22, and a circuit breaker contact 23 is arranged between the wire inlets and the wire outlets of the A wire 1, the B wire 2 and the C wire 3. In the figure, B1, B2, B3, B5, B6 and B7 are voltage sampling transformers, B4 is a circuit working power supply transformer, Z1, Z2, Z3 are power supply rectifier bridges, C3 are filter capacitors, R3 are divider resistors, Ic3 is a power supply voltage stabilizing circuit, Ic3 are voltage sampling comparison analysis circuits, Ic3 is a delay circuit, R3, C3 and C3 are delay circuits, Ic3, B3 and Ic3 are peripheral chip programmable instructions for Ic editing information. The capacitor C12, the resistor R10 and the crystal oscillator M are peripheral elements of Ic8, the Ic9 is an alarm circuit, and the R11, the R12 and the R13 are current-limiting resistors of the luminous indicating tubes D1, D2 and D3. Ic10 is a plug-in card GSM transmitter module, and Y is a wireless signal transmitter.
By adopting the monitoring and alarming device for the low-voltage power distribution cabinet equipment line connection point, the power input ends of the B1, B2 and B3 voltage sampling transformers 5 are respectively connected with the three-phase power supply inlet ports of the line A1, the line B2 and the line C3, namely the uppermost part of all power distribution equipment, and the input ends of the B5, the B6 and the B7 voltage sampling transformers 5 are respectively connected with the three-phase power supply outlet ports of the line A1, the line B2 and the line C3, namely the lowermost end of all the equipment. B1 and B5 are connected to the same phase A, B2 and B6 are connected to the same phase B, B3 and B7 are connected to the same phase C, if the line contact on the phase A of the power supply or the terminal contact of the equipment line pressing line is oxidized and aged, the resistance is increased, the contact is heated, and if the contact is seriously ignited and burnt, at this time, the voltage output ends of the voltage sampling transformers B1 and B5 will generate different voltages, which are caused by the voltage reduction generated by the connection points, and are generally obvious, the output end voltage of B5 is lower than the output end voltage of B1, the output voltages of B1 and B5 output direct current through the power rectifier bridges Z1 and Z5, then filtered by C1 and C6, and then divided by the voltage dividing resistors R1 and R4 to enter pins 1 and 2 of the voltage sampling comparative analysis circuit 7, when the voltage output by the B5 is lower than the comparison voltage set by the R4, the 3 pin output high level of the Ic2 is delayed for a certain time by the delay circuit Ic5 (the delay is mainly used for preventing interference caused by various transient voltages on the line). The level of the 3 pin of the Ic5 is changed from low to high, the information instruction storage circuit Ic8 works, the 13 pin outputs an instruction to enable the alarm circuit Ic9 to generate sound alarm, the 20 pin sends an instruction to turn on the GSM module circuit, the 18 pin outputs programmed voice or digital information and sends the information from the Ic10, a remote worker or a command platform can receive the alarm information, the worker can arrive at the site in time for maintenance to avoid larger loss, and the light-emitting indication tube D1 emits light to indicate so that the worker finds the power phase of a specific fault to find a fault point. B2 and B6 constitute the monitoring of the sampled voltage for phase B of the power supply, and B3 and B7 constitute the monitoring for phase C. The whole alarm information is sent in the same monitoring working mode and procedure as those formed by B1 and B5, and when the circuit breaker is automatically powered off and tripped due to human or electric leakage, line overcurrent and circuit breaker automatic power failure, the Ic8 sends different instruction information so as to be convenient for workers to identify. The transformer B4 is a working power transformer, and supplies the voltage to the whole circuit after being stabilized by the voltage stabilizing circuit IC1, and simultaneously charges the standby battery pack E. In the circuit, the voltage sampling transformer can be made of a subminiature high-quality copper wire, so that long-time normal sampling work is guaranteed, and the electric bridge, all the voltage comparison analysis circuits, the delay circuit, the information instruction, the programming chip, the GMS signal transmitting module and the alarm circuit are manufactured in industrial quality, so that the service life and the working reliability of the whole monitoring device are guaranteed.
Claims (8)
1. The utility model provides a low-voltage distribution cabinet equipment line connection point monitoring alarm device, is including A line (1), B line (2), C line (3) and earth connection O line (4) that constitute the three-phase power cord, characterized by: the wire inlet and the wire outlet of the A wire (1), the B wire (2) and the C wire (3) are respectively connected with a voltage sampling transformer (5), the voltage sampling transformer (5) is connected with a divider resistor (6), the two divider resistors (6) connected to the same phase power line are respectively connected with a voltage sampling comparison analysis circuit (7), the voltage sampling comparison analysis circuit (7) is connected with a programming chip (8), and the programming chip (8) is connected with a wireless signal transmitter (10) through a plug-in GSM transmitting module (9).
2. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 1, which is characterized in that: the programming chip (8) is connected with an alarm (12) through an alarm circuit (11).
3. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 1, which is characterized in that: the programming chip (8) is connected with current limiting resistors (13) respectively corresponding to the line A (1), the line B (2) and the line C (3), and each current limiting resistor (13) is connected with a light-emitting indicator tube (14).
4. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 1, which is characterized in that: a time delay circuit (15) is connected between the voltage sampling comparison analysis circuit (7) and the programming chip (8).
5. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 1, which is characterized in that: a power supply rectifier bridge (16) and a filter capacitor (17) are sequentially connected between the voltage sampling transformer (5) and the divider resistor (6).
6. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 1, which is characterized in that: the inlet of the C line (3) is connected with a circuit working power transformer (18), the circuit working power transformer (18) is connected with a power voltage stabilizing circuit (19), and the power voltage stabilizing circuit (19) is connected with a standby battery pack (20).
7. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 6, which is characterized in that: two filter capacitors (17) are connected between the circuit working power transformer (18) and the power voltage stabilizing circuit (19).
8. The low-voltage distribution cabinet equipment line connection point monitoring and alarming device of claim 1, which is characterized in that: the wire inlet of A line (1), B line (2) and C line (3) is equipped with power input wiring point (21) respectively, and the wire outlet of A line (1), B line (2) and C line (3) is equipped with power output wiring point (22) respectively, is equipped with circuit breaker contact (23) between the wire inlet and the wire outlet of A line (1), B line (2), C line (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110035141.7A CN112578319A (en) | 2021-01-12 | 2021-01-12 | Low-voltage distribution cabinet equipment line connection point monitoring alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110035141.7A CN112578319A (en) | 2021-01-12 | 2021-01-12 | Low-voltage distribution cabinet equipment line connection point monitoring alarm device |
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| Publication Number | Publication Date |
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| CN112578319A true CN112578319A (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110035141.7A Pending CN112578319A (en) | 2021-01-12 | 2021-01-12 | Low-voltage distribution cabinet equipment line connection point monitoring alarm device |
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Citations (9)
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|---|---|---|---|---|
| CN101741061A (en) * | 2008-11-24 | 2010-06-16 | 射阳伟龙电气有限公司 | Distribution transformer medium voltage low voltage integration protection method |
| CN203607923U (en) * | 2013-11-20 | 2014-05-21 | 芜湖东旭光电科技有限公司 | Emergency distribution system with insulation on-line monitoring function |
| CN203658545U (en) * | 2013-12-31 | 2014-06-18 | 施耐德电器工业公司 | Contact fault detecting and indicating device for heavy current protection/control switch |
| CN104376767A (en) * | 2014-11-20 | 2015-02-25 | 国家电网公司 | Practical training platform device for handling typical low-voltage faults |
| CN204241582U (en) * | 2014-10-11 | 2015-04-01 | 北京易艾斯德科技有限公司 | A kind of distributive data center power distribution monitoring device |
| CN205982497U (en) * | 2016-08-22 | 2017-02-22 | 山东力创科技股份有限公司 | AC distribution first cabinet inlet wire of row and monitoring module that is qualified for next round of competitions |
| CN108777089A (en) * | 2018-06-08 | 2018-11-09 | 国家电网有限公司 | A kind of correct errors with wiring connects electric training system with the dress table of fabrication evaluation |
| CN109524885A (en) * | 2019-01-23 | 2019-03-26 | 贵州电网有限责任公司 | A kind of intelligent low-pressure comprehensive distribution box based on Internet of Things chip wireless communication module |
| CN211209093U (en) * | 2019-10-29 | 2020-08-07 | 山东科技大学 | Intelligent prepackage type transformer substation |
-
2021
- 2021-01-12 CN CN202110035141.7A patent/CN112578319A/en active Pending
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| CN203658545U (en) * | 2013-12-31 | 2014-06-18 | 施耐德电器工业公司 | Contact fault detecting and indicating device for heavy current protection/control switch |
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| CN104376767A (en) * | 2014-11-20 | 2015-02-25 | 国家电网公司 | Practical training platform device for handling typical low-voltage faults |
| CN205982497U (en) * | 2016-08-22 | 2017-02-22 | 山东力创科技股份有限公司 | AC distribution first cabinet inlet wire of row and monitoring module that is qualified for next round of competitions |
| CN108777089A (en) * | 2018-06-08 | 2018-11-09 | 国家电网有限公司 | A kind of correct errors with wiring connects electric training system with the dress table of fabrication evaluation |
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