CN206452094U - A kind of intelligent self-recovery protector of overvoltage/undervoltage - Google Patents

A kind of intelligent self-recovery protector of overvoltage/undervoltage Download PDF

Info

Publication number
CN206452094U
CN206452094U CN201621098213.3U CN201621098213U CN206452094U CN 206452094 U CN206452094 U CN 206452094U CN 201621098213 U CN201621098213 U CN 201621098213U CN 206452094 U CN206452094 U CN 206452094U
Authority
CN
China
Prior art keywords
circuit
overvoltage
control module
undervoltage
intelligent self
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.)
Active
Application number
CN201621098213.3U
Other languages
Chinese (zh)
Inventor
刘访
何贺恩
梁永昌
甘向锋
温光宏
胡日亮
黄庆铿
叶旭铭
邹小辉
萧伟云
姚小金
伍浩洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Original Assignee
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd filed Critical Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority to CN201621098213.3U priority Critical patent/CN206452094U/en
Application granted granted Critical
Publication of CN206452094U publication Critical patent/CN206452094U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

The utility model embodiment discloses a kind of intelligent self-recovery protector of overvoltage/undervoltage; over-pressed, under-voltage and decompression under current condition is solved to haul oneself willingly into unstability, remove after o-volt protection because the low-voltage circuit breaker of all circuits is all remained closed; all user equipmenies will start simultaneously; starting current is very big; easily cause circuit instantaneous overload; it is totally unfavorable to electric power netting safe running and without o-volt protection breaker is removed, need that closing by hand workload is big, slow-footed problem when run unit restores electricity.The utility model embodiment includes:Detection module, shows circuit with voltage collection circuit and lamp;Control module, with analysis voltage, optocoupler mating, protection and high-power output circuit;The control module includes detection module, detects circuit voltage status by the detection module, and carry out the operation of transmission or not runback by the control module.

Description

A kind of intelligent self-recovery protector of overvoltage/undervoltage
Technical field
The utility model is related to circuit intelligent control protection field, more particularly to a kind of over-pressed, under-voltage and decompression intelligence is certainly Multiple protection device.
Background technology
In general, voltage in a supply line not steady state value, it may accordingly be produced because of the change of load Fluctuation.This voltage pulsation (such as under-voltage or overvoltage) in supply line once the scope that can bear beyond electrical equipment, Detrimental effect will be brought to electrical equipment, even cause the damage of electrical equipment.Therefore, under-voltage protection or mistake are generally used Protection device is pressed to ensure that electrical equipment is used under normal power supply state.
Existing market is used for over-pressed, under-voltage and decompression intelligent protection cabinet seldom, and its structure species is simple, and main use turns Switch is changed, auxiliary reclay and time relay assembly are formed, be not that loose contact do not throw is exactly to be chronically at switching state, Produce vibration and burn closing coil, serious even resulting in is unable to normal electricity consumption or produced great use electrification.
Utility model content
The utility model embodiment discloses a kind of intelligent self-recovery protector of overvoltage/undervoltage, is descended for solving current condition Pressure, under-voltage and decompression are hauled oneself willingly into unstability, removed after o-volt protection because the low-voltage circuit breaker of all circuits is all remained closed, institute There is user equipment will be while starting, starting current is very big, easily cause circuit instantaneous overload, it is totally unfavorable to electric power netting safe running And without o-volt protection breaker is removed, need that closing by hand workload is big, slow-footed problem when run unit restores electricity.
The utility model embodiment provides a kind of intelligent self-recovery protector of overvoltage/undervoltage, including:
Detection module, shows circuit with voltage collection circuit and lamp;
Control module, with analysis voltage, optocoupler mating, protection and high-power output circuit;
Control module includes detection module, and circuit voltage status is detected by detection module, and stopped by control module implementation, Power transmission runback is operated.
Alternatively, the circuit being provided with the intelligent self-recovery protector of overvoltage/undervoltage as detection module and control module power by The rectification circuit of 3 transformers and corresponding DC transfer circuit composition.
Alternatively, lamp shows circuit and specifically included:
Monolithic paster 8S003F3Pb, indicator lamp, chip 7S33,1n4007 are electrically connected with successively.
Alternatively, control module is specifically included:
Control module has analysis per road voltage circuit, optocoupler is coupled, protected and high-power relay output circuit;
Detection module, optical coupler P521, integrated chip AT89C2051, integrated chip 74SL14 are electric successively in control module Property connection.
Alternatively, control module is specifically included:
Detection module is also electrically connected with 7812 protection mu balanced circuits, 7805 protection mu balanced circuits in control module.
Alternatively, control module is specifically included:
Control module also has the luminous tube display driver circuit being electrically connected with control chip.
Alternatively, including:
Overvoltage/undervoltage intelligence self-recovery protector with luminous tube display driver circuit provided with being connected, for instruction device work Make the luminous tube of state.
Alternatively, including:
Overvoltage/undervoltage intelligence self-recovery protector with the drive circuit of control module provided with being connected, for setting time Double toggle switch.
Alternatively, including:
Control module is connected with high-power magnetic relay by drive circuit.
Alternatively, including:
The N wire terminals being connected with control module, A phases joint, B are additionally provided with overvoltage/undervoltage intelligence self-recovery protector to connect Head, C phase joints;
It is auxiliary that active point be connected with rectification circuit, splice grafting head and switch are additionally provided with overvoltage/undervoltage intelligence self-recovery protector Help contact access point.
As can be seen from the above technical solutions, the utility model embodiment has advantages below:
The utility model embodiment provides a kind of intelligent self-recovery protector of overvoltage/undervoltage, including:Detection module, with electricity Acquisition Circuit and lamp is pressed to show circuit;Control module, with analysis voltage, optocoupler mating, protection and high-power output circuit;Control Module includes detection module, detects circuit voltage status by detection module, and carries out transmission or not runback by control module and grasps Make, solve over-pressed, under-voltage and decompression under current condition and haul oneself willingly into unstability, remove low due to all circuits after o-volt protection Voltage breaker is all remained closed, and all user equipmenies will start simultaneously, and starting current is very big, easily causes circuit instantaneous overload, Totally unfavorable to electric power netting safe running and no dismounting o-volt protection breaker, needs closing by hand when run unit restores electricity Workload is big, slow-footed problem.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, before creative labor is not paid Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the detection module circuit theory schematic diagram of the utility model technique device.
Fig. 2 is the control module circuit theory schematic diagram of the utility model technique device.
Fig. 3 is the utility model technique device and the connection diagram of power supply unit Application Example.
Illustrate, IO1~IO3- input/output interfaces, D1- fairings, D3- fairings, D5- fairings, D2- diodes, D4- diodes, D6- diodes, 7812- integrated protective circuit chips, 7805- integrated protective circuit chips, C1 ~C16- electric capacity, R1~R3- resistance, 8S003F3Pb- monolithic pasters, 1A- pasters, 7S33- chips, the pole of 1n4007- rectifications two Pipe, the interface of IC1- integrated chips AT89C2051, IC2- integrated chip 74SL14,1- IC chip 7812, the integrated electricity of 2- The ground connection mouth of road chip 7812, the interface of 3- IC chips 7812, the interface of 4- IC chips 7805,5- control modules, Q1- switching devices, Q2- switching devices, QF- breakers, ZJ1~ZJ2 auxiliary reclays, TA- current transformers, HA- buttons, Get an electric shock A611- transformers, B611- transformers, C611- transformers, Qd- veneers position.
Embodiment
The utility model embodiment discloses a kind of intelligent self-recovery protector of overvoltage/undervoltage, is descended for solving current condition Pressure, under-voltage and decompression are hauled oneself willingly into unstability, removed after o-volt protection because the low-voltage circuit breaker of all circuits is all remained closed, institute There is user equipment will be while starting, starting current is very big, easily cause circuit instantaneous overload, it is totally unfavorable to electric power netting safe running And without o-volt protection breaker is removed, need that closing by hand workload is big, slow-footed problem when run unit restores electricity.
Referring to a kind of one embodiment provided in Fig. 1, Fig. 2, the utility model embodiment includes:
Detection module, shows circuit with voltage collection circuit and lamp;
Control module, with analysis voltage, optocoupler mating, protection and high-power output circuit;
Control module includes detection module, and circuit voltage status is detected by detection module, and stopped by control module implementation, Power transmission runback is operated.
Further, what the circuit being provided with the intelligent self-recovery protector of overvoltage/undervoltage as detection module and control module was powered The rectification circuit being made up of 3 transformers and corresponding DC transfer circuit.
Further, lamp shows circuit and specifically included:
8S003F3Pb monolithics paster, indicator lamp, chip 7S33,1n4007 commutation diode are electrically connected with successively.
Further, control module is specifically included:
Control module has analysis per road voltage circuit, optocoupler is coupled, protected and high-power relay output circuit;
Detection module, P521 optical couplers, AT89C2051 integrated chips, 74SL14 integrated chips are electric successively in control module Property connection.
Further, control module is specifically included:
Detection module also electrically connects with 7812 integrated protective circuit chips, 7805 integrated protective circuit chips in control module Connect.
Further, control module is specifically included:
Control module also has the luminous tube display driver circuit being electrically connected with control chip.
Further, including:
Overvoltage/undervoltage intelligence self-recovery protector with luminous tube display driver circuit provided with being connected, for instruction device work Make the luminous tube of state.
Further, including:
Overvoltage/undervoltage intelligence self-recovery protector with the drive circuit of control module provided with being connected, for setting time Double toggle switch.
Further, including:
Control module is connected with high-power magnetic relay by drive circuit.
Further, including:
The N wire terminals being connected with control module, A phases joint, B are additionally provided with overvoltage/undervoltage intelligence self-recovery protector to connect Head, C phase joints;
It is auxiliary that active point be connected with rectification circuit, splice grafting head and switch are additionally provided with overvoltage/undervoltage intelligence self-recovery protector Help contact access point.
Wherein, provided with three detection modules, a control modules, detection in the intelligent self-recovery protector housing of overvoltage/undervoltage There is per phase voltage module collection, setting and lamp to show circuit.
Referring to Fig. 1, three detection modules are by electricity such as model ST monolithic pasters 8S003F3Pb, chip 7S33 and paster 1A Sub- component composition, for indicating that six indicator lamps of power supply signal state refer to Fig. 1.
Referring to Fig. 2, control module has analysis per road voltage circuit, optocoupler is coupled, protect and the output of high-power relay Circuit, the luminous tube display driver circuit being connected with control chip, and the luminous tube display module being connected with control chip.
The electronic device that control module is adapted by model AT89C2051 integrated chips and 74SL14 integrated chips is electrically connected Composition is connect, two rectification circuits powered for above-mentioned two integrated chip are additionally provided with, in the intelligent self-recovery protector shell of overvoltage/undervoltage Body, for double toggle switch of setting time, is additionally provided with and display module phase provided with being connected with drive circuit on housing Connection, for two or several luminous tubes of instruction device working condition, control module is connected with two by drive circuit High-power magnetic relay, is additionally provided with the rectification circuit that operating voltage is provided for foregoing circuit, rectification circuit is by 3 in housing Transformer and corresponding DC transfer circuit composition, are additionally provided with what is be connected as follows with control module and rectification circuit on housing External tapping:N wire terminals, A phases joint, B phases joint, C phases joint, active point, splice grafting head and switch auxiliary contact access point.As schemed It is the present apparatus and the application implementation connection diagram of power supply unit shown in 3.
Each contact in device takes N, A, B, C phase voltage, 0~220V of phase voltage, automatic air-break switch auxiliary contact respectively Take normally closed, active point, splice grafting point, can be attempted by automatic air-break switch breaker or button correspondence switch closing and switch opening at, it is green, red and Blue lamp is bright to represent that switch is dividing, closed a floodgate and protective position, and detection module red light lamp is bright to indicate power supply signal, and power supply is normal, inspection Surveying the red blue lamp all light of module represents power supply signal in normal range (NR);Control module green light represents switch in open position, red Lamp is bright to represent switch in closing position, and power supply is normal, and automatic air-break switch is in operating position;Blue lamp is bright to represent that this device enters guarantor Position is protected, power supply is normal, if line facility is faulty, must safeguard periphery circuit or equipment, disconnect the coincidence of this installation's power source , this device closing time is adjustable (tri- kinds of 5-10-15S), is set by toggle switch, while being 2 on 5S, 1 in up or down It is for 15S down in 10S, 1 time 2;This device power cut off delay is 3S, is confirmed as more than the time without electric separating brake, closing frequencies is once (can predetermined set), the present apparatus can realize being automatically brought into operation for power transmission and power-off.
A kind of intelligent self-recovery protector of overvoltage/undervoltage is provided in the present embodiment, including:One housing, housing is specifically also wrapped Include:Detection module 5, with voltage acquisition, initialization circuit;Control module, with analysis voltage, optocoupler mating, protection and big work( Rate output circuit;It is electrically connected between detection module and control module, circuit voltage status is detected by detection module, and pass through control Module carries out the operation of transmission or not runback, solves over-pressed, under-voltage and decompression under current condition and hauls oneself willingly into unstability, removes decompression Low-voltage circuit breaker after protection due to all circuits is all remained closed, and all user equipmenies will start simultaneously, and starting current is very big, Easily cause circuit instantaneous overload, totally unfavorable to electric power netting safe running and no dismounting o-volt protection breaker, operation is single Need that closing by hand workload is big, slow-footed problem when bit recovery is powered.
One of the concrete application process for the intelligent self-recovery protector of a kind of overvoltage/undervoltage that the utility model embodiment is provided Embodiment includes:
The present apparatus can realize that power transmission and power-off are automatically brought into operation process as follows:
Power transmission is automatically brought into operation:
High pressure drop switch power transmission or high voltage load cabinet, breaker cabinet and low voltage knife switch close a floodgate or knife-like switch is in closing position Put, i.e. three-phase A, B, C is powered.
A phases first, second are powered or power transmission simultaneously, it is ensured that breaker controller voltage and decompression loop voltage, now also It can not close a floodgate, there is electricity when B, C are identical, and equally detect, handle, after device confirms that A, B, C are powered after delay in 3 seconds, and nothing Over-pressed and under-voltage, device 5-15 seconds (adjustable) sends switching signal, and closing contact makes breaker closing by A phase control voltages. Any mutually over-pressed, the under-voltage and decompression of A, B, C is detected, microprocessor waiting is failure to actuate.
B phases first, second are powered or power transmission simultaneously, device collection, analysis, photoelectric coupling, microprocessor analysis, processing, There is electricity when A, C are identical, and equally detect, handle, after device confirms that A, B, C are powered after delay in 3 seconds, and without over-pressed and under-voltage, Device 5-15 seconds (adjustable) sends switching signal, and closing contact makes breaker closing by A phase control voltages.Detect A, B, C Any mutually over-pressed, under-voltage and decompression, microprocessor waiting is failure to actuate.
The finally energization of C phases or simultaneously power transmission, device collection, analysis, photoelectric coupling, microprocessor analysis, processing, in A, B phase There is an electricity simultaneously, and equally detect, handle, after device confirms that A, B, C are powered after delay in 3 seconds, and without over-pressed and under-voltage, device 5-15 seconds (adjustable) sends switching signal, and closing contact makes breaker closing by A phase control voltages.Detect A, B, C any Mutually over-pressed, under-voltage and decompression, microprocessor waiting is failure to actuate.
Power failure is automatically brought into operation:
A phase high pressure drop switch fall down or cable, disconnecting link close it is abnormal, cause A phase voltages do not have (0V decompressions), Not enough rated voltage 15% (below 185V is under-voltage --- adjustable) and higher than rated voltage 10% (more than 245V overvoltages --- adjustable) In the case of, voltage does not have (0V decompressions), no-voltage release action, killer switch separating brake;When over-pressed and under-voltage, the micro- place of the present apparatus The analysis of reason device sends sub-gate signal in 3 seconds in delay after (ensure thunderbolt or instantaneous loss of pressure misoperation), by great-power electromagnetic after Electrical equipment acts separating brake, and accordingly light instruction, breaker open operation.If A phase voltages recover normal, device was 5-15 seconds (adjustable) Automatically send switching signal and close breaker.
B phase high pressure drop switch fall down or cable, disconnecting link close it is abnormal, cause B phase voltages do not have (0V decompressions), Not enough rated voltage 15% (below 185V is under-voltage --- adjustable) and higher than rated voltage 10% (more than 245V overvoltages --- adjustable) In the case of, present apparatus collection B voltages decompression, it is over-pressed and under-voltage when, microprocessor analysis (ensured thunderbolt or wink in delay 3 seconds When decompression misoperation) after send sub-gate signal, separating brake is acted by high-power magnetic relay, and accordingly light and indicate, open circuit Device separating brake.If B phase voltages recover normal, device sends switching signal automatically 5-15 seconds (adjustable) and closes breaker.
C phase high pressure drop switch fall down or cable disconnecting links close it is abnormal, cause C phase voltages do not have (0V decompressions), Not enough rated voltage 15% (below 185V is under-voltage --- adjustable) and higher than rated voltage 10% (more than 245V overvoltages --- adjustable) In the case of, present apparatus collection C voltage decompression, it is over-pressed and under-voltage when, microprocessor analysis (ensured thunderbolt or wink in delay 3 seconds When decompression misoperation) after send sub-gate signal, separating brake is acted by high-power magnetic relay, and accordingly light and indicate, open circuit Device separating brake.If C phase voltages recover normal, device sends switching signal automatically 5-15 seconds (adjustable) and closes breaker.
Detection module is transmitted to control module by gathering circuit voltage status in the utility model embodiment, and through control Molding block analysis, photoelectric coupling, microprocessor analysis, processing have been carried out and have stopped power transmission and be automatically brought into operation, solved current condition and descended Pressure, under-voltage and decompression are hauled oneself willingly into unstability, removed after o-volt protection because the low-voltage circuit breaker of all circuits is all remained closed, institute There is user equipment will be while starting, starting current is very big, easily cause circuit instantaneous overload, it is totally unfavorable to electric power netting safe running And without o-volt protection breaker is removed, need that closing by hand workload is big, slow-footed problem when run unit restores electricity.
The utility model embodiment provides a kind of intelligent self-recovery protector of overvoltage/undervoltage, including:Detection module 5, has Voltage collection circuit and lamp show circuit;Control module, with analysis voltage, optocoupler mating, protection and high-power output circuit;Institute Stating control module includes detection module 5, and circuit voltage status is detected by the detection module 5, and real by the control module Row transmission or not runback is operated, and is solved over-pressed, under-voltage and decompression under current condition and is hauled oneself willingly into unstability, removes after o-volt protection Because the low-voltage circuit breaker of all circuits is all remained closed, all user equipmenies will start simultaneously, and starting current is very big, easily draw Circuit instantaneous overload is played, totally unfavorable to electric power netting safe running and no dismounting o-volt protection breaker, run unit recovers Need that closing by hand workload is big, slow-footed problem during power supply.
A kind of intelligent self-recovery protector of overvoltage/undervoltage provided by the utility model is described in detail above, for Those of ordinary skill in the art, the thought of foundation the utility model embodiment, in specific embodiments and applications It will change, in summary, this specification content should not be construed as to limitation of the present utility model.

Claims (10)

1. a kind of intelligent self-recovery protector of overvoltage/undervoltage, it is characterised in that including:
Detection module, shows circuit with voltage collection circuit and lamp;
Control module, with analysis voltage, optocoupler mating, protection and high-power output circuit;
The control module includes detection module, detects circuit voltage status by the detection module, and pass through the control mould Block carries out the operation of transmission or not runback.
2. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 1, it is characterised in that including:
What the circuit being provided with the intelligent self-recovery protector of the overvoltage/undervoltage as the detection module and the control module was powered The rectification circuit being made up of 3 transformers and corresponding DC transfer circuit.
3. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 1, it is characterised in that the lamp shows circuit and specifically wrapped Include:
Monolithic paster 8S003F3Pb, indicator lamp, chip 7S33,1n4007 are electrically connected with successively.
4. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 1, it is characterised in that the control module is specifically wrapped Include:
The control module has analysis per road voltage circuit, optocoupler is coupled, protected and high-power relay output circuit;
Detection module, optical coupler P521, integrated chip AT89C2051, integrated chip 74SL14 are electric successively in the control module Property connection.
5. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 4, it is characterised in that the control module is specifically wrapped Include:
The detection module is also electrically connected with 7812 protection circuits, 7805 protection circuits in the control module.
6. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 4, it is characterised in that the control module is specifically wrapped Include:
The control module also has the luminous tube display driver circuit being electrically connected with control chip.
7. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 6, it is characterised in that including:
The intelligent self-recovery protector of the overvoltage/undervoltage with the luminous tube display driver circuit provided with being connected, for indicating dress Put the luminous tube of working condition.
8. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 1, it is characterised in that including:
The intelligent self-recovery protector of the overvoltage/undervoltage is provided with to be connected with the drive circuit of the control module, during for setting Between double toggle switch.
9. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 1, it is characterised in that including:
The control module is connected with high-power magnetic relay by drive circuit.
10. the intelligent self-recovery protector of overvoltage/undervoltage according to claim 2, it is characterised in that including:
The N wire terminals being connected with the control module, A phases joint, B are additionally provided with the intelligent self-recovery protector of the overvoltage/undervoltage Phase joint, C phase joints;
Active point be connected with the rectification circuit is additionally provided with the intelligent self-recovery protector of the overvoltage/undervoltage, splice grafting head and is opened Close auxiliary contact access point.
CN201621098213.3U 2016-09-29 2016-09-29 A kind of intelligent self-recovery protector of overvoltage/undervoltage Active CN206452094U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621098213.3U CN206452094U (en) 2016-09-29 2016-09-29 A kind of intelligent self-recovery protector of overvoltage/undervoltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621098213.3U CN206452094U (en) 2016-09-29 2016-09-29 A kind of intelligent self-recovery protector of overvoltage/undervoltage

Publications (1)

Publication Number Publication Date
CN206452094U true CN206452094U (en) 2017-08-29

Family

ID=59661942

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621098213.3U Active CN206452094U (en) 2016-09-29 2016-09-29 A kind of intelligent self-recovery protector of overvoltage/undervoltage

Country Status (1)

Country Link
CN (1) CN206452094U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451345A (en) * 2016-09-29 2017-02-22 广东电网有限责任公司东莞供电局 Overvoltage-undervoltage intelligent self-restoring protection device
CN109617010A (en) * 2018-12-06 2019-04-12 公牛集团股份有限公司 A kind of overvoltage/undervoltage protective device and its control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106451345A (en) * 2016-09-29 2017-02-22 广东电网有限责任公司东莞供电局 Overvoltage-undervoltage intelligent self-restoring protection device
CN109617010A (en) * 2018-12-06 2019-04-12 公牛集团股份有限公司 A kind of overvoltage/undervoltage protective device and its control method
CN109617010B (en) * 2018-12-06 2020-08-14 公牛集团股份有限公司 Over-voltage and under-voltage protection device and control method thereof

Similar Documents

Publication Publication Date Title
CN204068405U (en) The earth leakage protective DC power-supply system of a kind of band
CN101447660B (en) Automatic reclosing controller of general low-voltage circuit breaker
CN107204603A (en) Miniature circuit breaker reclosing controller and control method in a kind of low pressure distributed photovoltaic power
CN205427552U (en) High -voltage switch intelligent control ware
CN206452094U (en) A kind of intelligent self-recovery protector of overvoltage/undervoltage
CN101447661B (en) Control method for automatic reclosing controller
CN102148529A (en) Control device and control method thereof for intelligently supplying power to circuit breaker control unit
CN203645325U (en) Double-circuit power supply intelligent communication controller
CN205319962U (en) Digital high voltage dc source control system
CN105261530B (en) A kind of more strokes of breaker realize circuit and control method
CN208352961U (en) A kind of comprehensive protective circuit breaker
CN204441855U (en) A kind of under voltage trip gear
CN201130844Y (en) Automatic reclosing control apparatus for low-voltage breaker
CN206517038U (en) Leakage protection circuit with ground wire grounded resistance detection function
CN101976819B (en) Mine explosion-proof alternative current (AC) vacuum electromagnetic starter
CN205123234U (en) No external power supply type motor protector of intelligence
CN201146380Y (en) Protective equipment for decompression, phase-off and self-switchover
CN204314645U (en) A kind of low-voltage distribution system by screen break-make automaton
CN103855690A (en) Power-off releaser circuit used for auto-reclosing switch
CN208955640U (en) A kind of Self-recover overvoltage-undervoltage protector
CN201846063U (en) Mining explosion-proof alternating-current vacuum electromagnetic starter
CN105262052A (en) Intelligent motor protector without external power source
CN205158000U (en) Control system recloses
CN106451345A (en) Overvoltage-undervoltage intelligent self-restoring protection device
CN205246778U (en) Mimic -disconnecting switch for electric power

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant