CN110611313A - Three-phase four-wire AC power frequency intelligent protection safety power supply - Google Patents
Three-phase four-wire AC power frequency intelligent protection safety power supply Download PDFInfo
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- CN110611313A CN110611313A CN201910959903.5A CN201910959903A CN110611313A CN 110611313 A CN110611313 A CN 110611313A CN 201910959903 A CN201910959903 A CN 201910959903A CN 110611313 A CN110611313 A CN 110611313A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a three-phase four-wire alternating current power frequency intelligent protection safety power supply, which comprises an input circuit breaker, wherein the input circuit breaker is connected with an external three-phase circuit; the output circuit breaker is connected with an internal three-phase circuit; the IT power supply module is used for changing the output connection mode of the circuit; a first contactor; a control system power supply module; a radio insulation detection module; a second contactor; a capacitive short circuit spark suppressor module; a mains supply contactor; an emergency power transmission switch module; a main control chip; and (5) assisting the control chip. Through the insulating condition of radio insulation detection module in the on-line measuring circuit and feed back to main control chip in real time, the person of being convenient for use examines the problem fast, makes short-circuit current suppressed through holding the sense short circuit spark suppressor module, avoids producing the short circuit spark, increases safety power supply's security, and the inhibition speed is faster, safety power supply passes through full function DTU and realizes the data interconnection with the computer, and the person of being convenient for use manages safety power supply.
Description
Technical Field
The invention relates to the field of safety power supplies, in particular to a three-phase four-wire alternating-current power-frequency intelligent protection safety power supply.
Background
With the development of industrial technology, the modern industry generally uses industrial automatic electrical equipment, because the safety coefficient of industrial electrical equipment is lower than the factor of safety of civilian equipment, and in the operation process, the personal safety accident electric fire accident that arouses because environment, gas, temperature etc. frequently takes place, and industrial power consumption circuit is exposed outdoors for a long time, then use and air oxidation lead to the circuit insulating properties degradation degree to be greater than civilian electric wire far away, and industrial power consumption is higher than civilian power supply, then the electric fire accident takes place more easily, and adopt three-phase four-wire safety power supply can effectively avoid and reduce the emergence of electric safety accident, prevent the influence that is brought by circuit, equipment, environment.
The existing three-phase safety power supply in the market is basically a plurality of grounding systems such as TN, TT, TNS, TNC and TNCS, the systems have the common point that the line insulation condition cannot be detected on line, and the mechanical action type spark suppressor is low in speed in the aspect of spark suppression and is easy to cause electrical fire accidents.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a three-phase four-wire alternating-current power-frequency intelligent protection safety power supply.
In order to achieve the purpose, the invention adopts the following technical scheme:
three-phase four-wire alternating current power frequency intelligent protection safety power supply comprises:
the input circuit breaker is connected with an external three-phase circuit;
the output circuit breaker is connected with an internal three-phase circuit;
the IT power supply module is used for changing the output connection mode of the circuit;
the first contactor is used for controlling the on-off state of the IT power supply module;
the control system power supply module is used for controlling the single-phase power supply of the system;
the radio insulation detection module is used for detecting the online insulation state of the equipment and the subscriber line;
the second contactor is used for controlling the output switch state of the IT power supply module;
the capacitive short circuit spark suppressor module is used for suppressing a spark phenomenon caused by a large current in a circuit due to short circuit;
the mains supply contactor is used for connecting a mains supply circuit and outputting the mains supply circuit to the internal three-phase circuit;
the emergency power transmission switch module is used for switching to a mains supply circuit for outputting when equipment fails;
the main control chip is used for collecting data sent back by each sensor, analyzing, demodulating and controlling all the linkage mechanisms and sending data to the big data platform;
and the auxiliary control chip is used for quickly calculating data returned by short circuit, fault, overcurrent and overload.
Preferably, the input circuit breaker, the first contactor, the IT power module, the second contactor, the radio insulation detection module, the capacitive short circuit spark suppressor module and the output circuit breaker are electrically connected in sequence, the control system power module is electrically connected to the output end of the input circuit breaker, the input end and the output end of the commercial power contactor are respectively electrically connected to the output end of the input circuit breaker and the input end of the capacitive short circuit spark suppressor module, and the emergency power transmission switch module is electrically connected to the control end of the commercial power contactor;
the IT power supply module is a special power supply made of high-permeability grain-oriented silicon steel, the insulation coefficient is up to 3000V, the inductive reactance system is high, and the IT power supply module can bear more than three times of impact current without damaging the voltage of a power grid;
when a circuit or equipment is in a short circuit condition, a large current can be generated to cause sparks which are extremely dangerous and can ignite inflammable and explosive articles, the capacitive short circuit spark suppressor module can suppress a large current in the reactor, the large current is pressed into magnetic energy due to the characteristic that the current of the reactor can not change suddenly, and then a detection signal is transmitted to the main control chip for processing;
the radio insulation detection module sends the direct current 100V radio signal to an IT power output system, and the current is calculated according to the ground high-value grounding resistance between the output secondary circuit and the ground, so that the leakage current value and the resistance value are obtained.
Preferably, the main control chip is electrically connected with the auxiliary control chip in a communication manner, the main control chip is electrically connected with a first mutual inductance current detection circuit, the auxiliary control chip is electrically connected with a second mutual inductance current detection circuit, and the first mutual inductance current detection circuit and the second mutual inductance current detection circuit are respectively and electrically connected with the output end of the radio insulation detection module and the input end of the capacitance-inductance short circuit spark suppressor module.
Preferably, the main control chip is respectively and electrically connected with an indicator lamp, an acousto-optic system module, a display screen, a smoke detection module, a heat dissipation module and a full-function DTU module.
The full-function DTU module comprises three working modes of 2-3-4G/NB-IOT and wired and WIFI, different communication connections can be conveniently realized according to field communication equipment, the applicability of communication connection of a safety power supply is improved, the smoke detection module can detect surrounding combustible gas and smoke generated by combustion, then detected signals are transmitted to the main control chip, the main control chip controls and disconnects the input circuit breaker to enable the safety power supply to be not conducted with an external three-phase circuit, the fire safety of the safety power supply is improved, when the smoke detection module does not detect smoke, the input circuit breaker can be opened by the main control chip to be connected with the external three-phase circuit, the DTU module is automatically opened and closed, the use is convenient, and circuit data detected by the safety power supply are displayed by the display screen through output data of the main control chip, such as input current, output current, The leakage resistance value and the like, the heat generated when the safety power supply operates can be quickly reduced by the heat dissipation module, and the stable operation of the safety power supply is ensured.
Preferably, the main control chip is electrically connected with the input circuit breaker, the first contactor, the IT power supply module, the second contactor, the radio insulation detection module and the mains supply contactor respectively, and the auxiliary control chip is electrically connected with the capacitive short circuit spark suppressor module;
the main control chip is connected with the input circuit breaker to realize detection of input voltage and control of the input circuit breaker, the main control chip is connected with the first contactor to realize control of connection and disconnection of an external three-phase circuit of commercial power and an IT power supply module, the main control chip is connected with the IT power supply module to realize state detection of the IT power supply module, the main control chip is connected with the second contactor to realize connection and disconnection control of safety power output by the IT power supply module, the main control chip is connected with the commercial power contactor to realize switching output control of the commercial power and the safety power supply, the main control chip is connected with the radio insulation detection module to realize radio insulation detection, the main control chip is connected with the first mutual inductance current detection circuit to realize detection of output current, the auxiliary control chip is connected with the capacitive inductance short circuit spark suppressor module to realize capacitive inductance acquisition voltage detection, and the auxiliary.
Preferably, the capacitive short spark suppressor module comprises a first suppression circuit, a second suppression circuit, a third suppression circuit, and a fourth suppression circuit;
the auxiliary control chip and the capacitive short circuit spark suppressor module form a short circuit spark suppression circuit, the dual power operational amplifier performs phase inversion amplification processing on information collected by the reactor and the current transformer, the first suppression circuit, the second suppression circuit, the third suppression circuit and the fourth suppression circuit respectively collect the information, then a buffer circuit formed by the first suppression circuit, the second suppression circuit, the third suppression circuit and the fourth suppression circuit sends signals to the auxiliary control chip for processing, the auxiliary control chip comprises two serial ports for communication, one serial port returns data to the main control chip and serves as a message, when a short circuit occurs, the auxiliary control chip detects short circuit current through the second mutual inductance current detection circuit, and meanwhile, the first suppression circuit, the second suppression circuit, the third suppression circuit and the fourth suppression circuit of the capacitive short circuit spark suppressor module suppress the short circuit current in the capacitor to avoid spark generation, and the auxiliary control chip transmits the short circuit data to the main control chip, and the main control chip outputs the short-circuit action response to the second contactor so as to disconnect the safety power supply from the internal three-phase circuit.
The invention has the following beneficial effects:
1. through the leakage current value and the resistance value of radio insulation detection module detection circuitry, can exist and damage the electric leakage condition in the on-line measuring circuit, and radio insulation detection module exports the testing result to main control chip, and main control chip passes through the display screen with the result again and shows, and convenient to use person short-term test circuit condition and quick investigation problem.
2. The capacitive short circuit spark suppressor module adopts a first suppression circuit, a second suppression circuit, a third suppression circuit and a fourth suppression circuit to perform short circuit suppression on each line in a three-phase four-wire circuit respectively, so that short circuit current is suppressed in the capacitive short circuit spark suppressor module, sparks generated by a safety power supply during short circuit are avoided, the safety of the safety power supply is improved, and the suppression spark action speed of the electronic capacitive short circuit spark suppressor module is far higher than that of a mechanical spark suppressor.
3. Realize the remote data interconnection of safety power and management computer through full function DTU module for the user can long-rangely look over the in service behavior of safety power, and convenient to use person manages safety power, makes three-phase safety power more be applicable to industrial use.
In conclusion, the radio insulation detection module is used for detecting the insulation condition in the circuit on line and feeding the insulation condition back to the main control chip in real time, so that a user can conveniently and quickly troubleshoot the problem, the capacitive short circuit spark suppressor module is used for suppressing the short circuit current, short circuit sparks are avoided, the safety of the safety power supply is improved, the suppression speed is higher, the safety power supply is connected with a computer through the full-function DTU, and the user can conveniently manage the safety power supply.
Drawings
FIG. 1 is a schematic circuit connection diagram of a three-phase four-wire AC power frequency intelligent protection safety power supply provided by the invention;
FIG. 2 is a schematic diagram of a first suppression circuit of the three-phase four-wire AC power frequency intelligent protection safety power supply provided by the invention;
FIG. 3 is a schematic diagram of a second suppression circuit of the three-phase four-wire AC power frequency intelligent protection safety power supply provided by the invention;
FIG. 4 is a schematic diagram of a third suppression circuit of the three-phase four-wire AC power frequency intelligent protection safety power supply provided by the invention;
fig. 5 is a schematic diagram of a fourth suppression circuit of the three-phase four-wire ac power-frequency intelligent protection safety power supply provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, a three-phase four-wire ac power frequency intelligent protection safety power supply includes:
the input circuit breaker is connected with an external three-phase circuit;
the output circuit breaker is connected with the internal three-phase circuit;
the IT power supply module is used for changing the output connection mode of the circuit;
the first contactor is used for controlling the on-off state of the IT power supply module;
the control system power supply module is used for controlling the single-phase power supply of the system;
the radio insulation detection module is used for detecting the online insulation state of the equipment and the subscriber line;
the second contactor is used for controlling the output switch state of the IT power supply module;
the capacitive short circuit spark suppressor module is used for suppressing a spark phenomenon caused by a large current in a circuit due to short circuit;
the mains supply contactor is used for connecting a mains supply circuit and outputting the mains supply circuit to the internal three-phase circuit;
the emergency power transmission switch module is used for switching to a mains supply circuit for outputting when equipment fails;
the main control chip is used for collecting data sent back by each sensor, analyzing, demodulating and controlling all the linkage mechanisms and sending data to the big data platform;
and the auxiliary control chip is used for quickly calculating data returned by short circuit, fault, overcurrent and overload.
The power supply system comprises an input circuit breaker, a first contactor, an IT power supply module, a second contactor, a radio insulation detection module, a capacitive short circuit spark suppressor module and an output circuit breaker which are electrically connected in sequence, wherein an operation and control system power supply module is electrically connected to the output end of the input circuit breaker;
the IT power supply module is a special power supply made of high-permeability grain-oriented silicon steel, the insulation coefficient is up to 3000V, the inductive reactance system is high, and the IT power supply module can bear more than three times of impact current without damaging the voltage of a power grid;
when a circuit or equipment is in a short circuit condition, a large current can be generated to cause sparks which are extremely dangerous and can ignite inflammable and explosive articles, the capacitive short circuit spark suppressor module can suppress a large current in the reactor, the large current is pressed into magnetic energy due to the characteristic that the current of the reactor can not change suddenly, and then a detection signal is transmitted to the main control chip for processing;
the radio insulation detection module sends the direct current 100V radio signal to an IT power output system, and the current is calculated according to the ground high-value grounding resistance between the output secondary circuit and the ground, so that the leakage current value and the resistance value are obtained.
The main control chip is electrically connected with the auxiliary control chip in a communication mode, the main control chip is electrically connected with a first mutual inductance current detection circuit, the auxiliary control chip is electrically connected with a second mutual inductance current detection circuit, and the first mutual inductance current detection circuit and the second mutual inductance current detection circuit are respectively electrically connected to the output end of the radio insulation detection module and the input end of the capacitance short circuit spark suppressor module.
The main control chip is respectively and electrically connected with an indicator lamp, an acousto-optic system module, a display screen, a smoke detection module, a heat dissipation module and a full-function DTU module.
The full-function DTU module comprises three working modes of 2-3-4G/NB-IOT and wired and WIFI, different communication connections can be conveniently realized according to field communication equipment, the applicability of communication connection of a safety power supply is improved, the smoke detection module can detect surrounding combustible gas and smoke generated by combustion, then detected signals are transmitted to the main control chip, the main control chip controls and disconnects the input circuit breaker to enable the safety power supply to be not conducted with an external three-phase circuit, the fire safety of the safety power supply is improved, when the smoke detection module does not detect smoke, the input circuit breaker can be opened by the main control chip to be connected with the external three-phase circuit, the DTU module is automatically opened and closed, the use is convenient, and circuit data detected by the safety power supply are displayed by the display screen through output data of the main control chip, such as input current, output current, The leakage resistance value and the like, the heat generated when the safety power supply operates can be quickly reduced by the heat dissipation module, and the stable operation of the safety power supply is ensured.
The main control chip is respectively electrically connected with the input circuit breaker, the first contactor, the IT power supply module, the second contactor, the radio insulation detection module and the mains supply contactor, and the auxiliary control chip is electrically connected with the capacitive short circuit spark suppressor module;
the main control chip is connected with the input circuit breaker to realize detection of input voltage and control of the input circuit breaker, the main control chip is connected with the first contactor to realize control of connection and disconnection of an external three-phase circuit of commercial power and an IT power supply module, the main control chip is connected with the IT power supply module to realize state detection of the IT power supply module, the main control chip is connected with the second contactor to realize connection and disconnection control of safety power output by the IT power supply module, the main control chip is connected with the commercial power contactor to realize switching output control of the commercial power and the safety power supply, the main control chip is connected with the radio insulation detection module to realize radio insulation detection, the main control chip is connected with the first mutual inductance current detection circuit to realize detection of output current, the auxiliary control chip is connected with the capacitive inductance short circuit spark suppressor module to realize capacitive inductance acquisition voltage detection, and the auxiliary.
The capacitive short circuit spark suppressor module comprises a first suppression circuit, a second suppression circuit, a third suppression circuit and a fourth suppression circuit;
the auxiliary control chip and the capacitive short circuit spark suppressor module form a short circuit spark suppression circuit, the dual power operational amplifier performs phase inversion amplification processing on information collected by the reactor and the current transformer, the first suppression circuit, the second suppression circuit, the third suppression circuit and the fourth suppression circuit respectively collect the information, then a buffer circuit formed by the first suppression circuit, the second suppression circuit, the third suppression circuit and the fourth suppression circuit sends signals to the auxiliary control chip for processing, the auxiliary control chip comprises two serial ports for communication, one serial port returns data to the main control chip and serves as a message, when a short circuit occurs, the auxiliary control chip detects short circuit current through the second mutual inductance current detection circuit, and meanwhile, the first suppression circuit, the second suppression circuit, the third suppression circuit and the fourth suppression circuit of the capacitive short circuit spark suppressor module suppress the short circuit current in the capacitor to avoid spark generation, and the auxiliary control chip transmits the short circuit data to the main control chip, and the main control chip outputs the short-circuit action response to the second contactor so as to disconnect the safety power supply from the internal three-phase circuit.
When the intelligent power supply is used, an input circuit breaker of a safety power supply is connected with an external three-phase circuit of commercial power, then the safety power supply is started, a main control chip detects whether the voltage of the input power supply is stable through the input circuit breaker, the input circuit breaker is switched on after the input voltage is stable, the input voltage value is displayed on a display screen, then the temperature of an IT power supply module is detected, when the temperature is detected normally, a commercial power contactor and a first contactor are attracted, so that the commercial power circuit is connected, the IT power supply module finishes input power supply, then a second contactor is attracted, so that the safety power is sent to a radio insulation detection module for detection, and when an output circuit breaker is switched on, the safety power supply starts to supply;
when the circuit has a leakage condition, the circuit current changes, the main control chip controls the radio insulation detection module to send a direct current 100V radio signal to the IT power output system, the current is calculated according to the ground high-value grounding resistance between the output secondary circuit and the ground, the leakage current value and the resistance value are obtained and displayed on the display screen, and a user can conveniently and quickly troubleshoot the problems;
when a short circuit occurs in a line, the short-circuit current is suppressed through a first suppression circuit, a second suppression circuit, a third suppression circuit and a fourth suppression circuit of the capacitive-induction short-circuit spark suppressor module, so that a short-circuit point cannot suddenly change, the short-circuit current cannot form electric sparks, and the safety of the short-circuit point is improved;
the running condition of the safety power supply controls the full-function DTU module to realize data interconnection with the computer through the main control chip, and the running data is fed back to the computer in real time, so that the management of a user is facilitated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. Three-phase four-wire AC power frequency intelligent protection safety power supply, its characterized in that includes:
the input circuit breaker is connected with an external three-phase circuit;
the output circuit breaker is connected with an internal three-phase circuit;
the IT power supply module is used for changing the output connection mode of the circuit;
the first contactor is used for controlling the on-off state of the IT power supply module;
the control system power supply module is used for controlling the single-phase power supply of the system;
the radio insulation detection module is used for detecting the online insulation state of the equipment and the subscriber line;
the second contactor is used for controlling the output switch state of the IT power supply module;
the capacitive short circuit spark suppressor module is used for suppressing a spark phenomenon caused by a large current in a circuit due to short circuit;
the mains supply contactor is used for connecting a mains supply circuit and outputting the mains supply circuit to the internal three-phase circuit;
the emergency power transmission switch module is used for switching to a mains supply circuit for outputting when equipment fails;
the main control chip is used for collecting data sent back by each sensor, analyzing, demodulating and controlling all the linkage mechanisms and sending data to the big data platform;
and the auxiliary control chip is used for quickly calculating data returned by short circuit, fault, overcurrent and overload.
2. The three-phase four-wire AC power frequency intelligent protection safety power supply of claim 1, wherein the input circuit breaker, the first contactor, the IT power module, the second contactor, the radio insulation detection module, the capacitance induction short circuit spark suppressor module and the output circuit breaker are electrically connected in sequence, the control system power module is electrically connected to the output end of the input circuit breaker, the input end and the output end of the commercial power contactor are respectively electrically connected to the output end of the input circuit breaker and the input end of the capacitance induction short circuit spark suppressor module, and the emergency power transmission switch module is electrically connected to the control end of the commercial power contactor.
3. The three-phase four-wire AC power frequency intelligent protection safety power supply of claim 1, wherein the main control chip is electrically connected with the auxiliary control chip in a communication manner, the main control chip is electrically connected with a first mutual inductance current detection circuit, the auxiliary control chip is electrically connected with a second mutual inductance current detection circuit, and the first mutual inductance current detection circuit and the second mutual inductance current detection circuit are respectively electrically connected with the output end of the radio insulation detection module and the input end of the capacitive short circuit spark suppressor module.
4. The three-phase four-wire AC power frequency intelligent protection safety power supply of claim 1, wherein the main control chip is electrically connected with an indicator lamp, an acousto-optic system module, a display screen, a smoke detection module, a heat dissipation module and a full-function DTU module respectively.
5. The three-phase four-wire AC power frequency intelligent protection safety power supply of claim 1, wherein the main control chip is electrically connected with the input breaker, the first contactor, the IT power supply module, the second contactor, the radio insulation detection module and the mains supply contactor respectively, and the auxiliary control chip is electrically connected with the capacitive short circuit spark suppressor module.
6. The three-phase four-wire AC power frequency intelligent protection safety power supply of claim 1, wherein the capacitive short circuit spark suppressor module comprises a first suppression circuit, a second suppression circuit, a third suppression circuit and a fourth suppression circuit.
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| CN201910959903.5A CN110611313A (en) | 2019-10-10 | 2019-10-10 | Three-phase four-wire AC power frequency intelligent protection safety power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113241754A (en) * | 2021-03-09 | 2021-08-10 | 华邦创科(惠州市)智能科技有限公司 | Three-phase four-wire parallel phase controller |
| CN113872182A (en) * | 2021-07-15 | 2021-12-31 | 华邦创科(惠州市)智能科技有限公司 | A three-phase △-Y isolated safe power supply system |
| CN120473942A (en) * | 2025-05-19 | 2025-08-12 | 广东华创智能电气科技有限公司 | Three-phase L-type intelligent protector |
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