CN103311884B - A kind of Self-recover overvoltage-undervoltage protector with creepage protection function - Google Patents
A kind of Self-recover overvoltage-undervoltage protector with creepage protection function Download PDFInfo
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- CN103311884B CN103311884B CN201310143375.9A CN201310143375A CN103311884B CN 103311884 B CN103311884 B CN 103311884B CN 201310143375 A CN201310143375 A CN 201310143375A CN 103311884 B CN103311884 B CN 103311884B
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Abstract
A kind of Self-recover overvoltage-undervoltage protector with creepage protection function, it includes box body and control unit, control unit includes power circuit (1), current sampling circuit (2), voltage sampling circuit (3), microprocessor (4), keystroke handling circuit (5), working state indicating circuit (6), magnetic relay drive circuit (7), magnetic latching relay (8), creepage mutual inductor (9), storage capacitor (10) and chip periphery circuit (11), a kind of Self-recover overvoltage-undervoltage protector with creepage protection function provided by the invention, after overvoltage/undervoltage protection act, when supply voltage is returned in normal voltage range, turn on automatically power supply, ensure the continuity of power supply, power supply quality is ensured；After earth leakage protective action, after manual key of fixing a breakdown confirms, turn on automatically power supply, power supply continuity is ensure that, protects personal safety.
Description
Technical field
The invention belongs to low voltage electrical apparatus technology field, is exactly specifically to be related to a kind of self-resetting type mistake with creepage protection function
Pressure-failure protector.
Background technology
In the field that low-voltage electrical apparatus uses, single phase power supply overvoltage, under-voltage often occurs, causes various electrical equipment to damage,
Or because electric leakage causes personal injury.In order to avoid the generation of this security incident, protection is installed in low-voltage electrical apparatus is using circuit
Device, when overvoltage, under-voltage occurs in supply line, protection device can rapidly, safely be cut off under continuous high-pressure impact
Circuit, abnormal voltage is avoided to be sent into the generation that terminal appliance causes the accident, when voltage recovers normal value, protector will be in regulation
Interior automatic processing circuit, it is ensured that terminal appliance normal operation in the case of unattended, at present, such protection device have three kinds
Form：One kind is neutral conductor interrupted protective equipment, and overvoltage/undervoltage defencive function, but such are realized using the cooperation of electrical apparatus release and relay
Protector does not possess creepage protection function, and is difficult to obtain zero potential benchmark, such protector is often produced malfunction；Second
Kind is the breaker also protected with electric leakage with overvoltage/undervoltage, though such protector has earth leakage protective and overvoltage/undervoltage defencive function,
Power off and can not recover automatically after being threaded off because of overvoltage/undervoltage protection act, palpus user's closing by hand, in-convenience in use, it have impact on power supply and connect
Continuous property；The third is the Self-recover overvoltage-undervoltage protector using common relay, does not possess creepage protection function, though it can reach certainly
Multiple function, but due to using common relay, making rated operational current to accomplish 40A and below 40A, if relay leads to for a long time
Electricity, then power consumption is big, temperature rise, and reliability is poor.
The Chinese patent patent No. 200920159472.6 discloses a kind of Self-recover overvoltage-undervoltage for illuminator and protected
Device, its control circuit are protected by power circuit, voltage sampling circuit, microprocessor, working state indicating circuit, drive circuit, magnetic
Relay, energy storage filter capacitor composition are held, using microprocessor voltage detecting and control, operation voltage value, delay time adjustment
Simply, precision is high, effectively protects rear condenser from the damage of overvoltage or under-voltage, using magnetic latching relay as execution
Element, power consumption is low, energy-conserving and environment-protective, and has auto-reset function, but this technology does not have creepage protection function, easily occurs
Security incident.
The content of the invention
Overvoltage in circuit is installed for existing low-voltage electrical apparatus, undervoltage protection device is not used to realize earth leakage protective simultaneously
With runback bit function, the present invention provides a kind of Self-recover overvoltage-undervoltage protector with creepage protection function, not only has leakage simultaneously
Electric protection and runback bit function, also there is the characteristics of power consumption is low, energy-conserving and environment-protective, improve the safe application performance of low-voltage electrical apparatus.
Technical scheme
In order to realize above-mentioned technical purpose, a kind of Self-recover overvoltage-undervoltage protection with creepage protection function of present invention design
Device, it includes box body and control unit, and control unit includes power circuit, current sampling circuit, voltage sampling circuit, microprocessor
Device, keystroke handling circuit, working state indicating circuit, magnetic relay drive circuit, magnetic latching relay, creepage mutual inductor, storage
Energy electric capacity and chip periphery circuit, it is characterised in that：The power circuit input inputs for civil power, and output end is connected to micro- place
Manage on device, magnetic relay drive circuit, magnetic latching relay and storage capacitor, the current sampling circuit input is electric leakage
Transformer leading-out terminal, output end are connected to microprocessor, and voltage sampling circuit input inputs for civil power, and output end is connected to micro-
Processor, sampled voltage signal is provided for microprocessor, keystroke handling circuit input end is button, and output end is connected to microprocessor
Device, actuation of keys control signal is provided for microprocessor, microprocessor exports two groups of signals, and one group is transported to working condition instruction
Circuit, another group is transported to magnetic relay drive circuit, by driving magnetic latching relay after magnetic relay drive circuit.
The storage capacitor input is connected to power circuit, output end connection magnetic latching relay, relay is kept for magnetic
Device action provides instantaneous energy；
The chip periphery circuit input end is connected to power circuit, output end connection microprocessor, is carried for microprocessor
Power supply source；
The creepage mutual inductor input inputs for civil power.
The power circuit includes decompression capacitor, discharge resistance, rectifier bridge, filter capacitor, piezo-resistance, first resistor,
Second resistance, 3rd resistor, the 4th resistance, voltage-stabiliser tube, triode and three terminal regulator, second resistance, 3rd resistor, voltage-stabiliser tube
With triode form shunt regulating circuit be connected with after magnetic relay drive circuit, three terminal regulator output end through the first electric capacity with
Second electric capacity is connected with microprocessor.
The magnetic relay drive circuit includes the first driving resistance, the second driving resistance, the 3rd driving resistance, 4 wheel driven
Dynamic resistance, the first driving electric capacity, the second driving electric capacity, the first driving diode, the second driving diode, the first three poles of driving
Pipe, the second driving triode, magnetic relay drive circuit output end connection magnetic latching relay.
The current sampling circuit includes sample resistance, and the current signal that creepage mutual inductor creepage mutual inductor is gathered is changed
For voltage signal, voltage signal is sent into current-differencing amplifying circuit, then micro- place is sent into after the filtering of electric current low-pass filter circuit
Manage device.
The voltage sampling circuit is sent into voltage differential amplifying circuit again through voltage LPF after line voltage is depressured
Microprocessor is sent into after circuit.
Beneficial effect
The present invention detects voltage and output control signal using microprocessor, and operation voltage value, delay time adjustment are simple,
Precision is high, effectively protects follow-up electrical equipment to influence to cause to damage from overvoltage, under-voltage.Leakage current is detected using microprocessor
And output control signal, high sensitivity, effectively avoid the personal injury caused by electric leakage.Using magnetic latching relay as execution
Element, can bear overload current, and it is extremely low that magnetic latching relay usually runs power consumption, energy-conserving and environment-protective, after overvoltage/undervoltage protection act,
When supply voltage is returned in normal voltage range, turn on automatically power supply, ensure the continuity of power supply, ensured power supply quality.
After earth leakage protective action, after manual key of fixing a breakdown confirms, turn on automatically power supply, power supply continuity is ensure that, is protected
Personal safety.
Brief description of the drawings
Accompanying drawing 1 is the working state schematic representation of control unit in the present invention.
Accompanying drawing 2 is power circuit connection diagram in the present invention.
Accompanying drawing 3 is current sampling circuit connection diagram in the present invention.
Accompanying drawing 4 is voltage sampling circuit connection diagram in the present invention.
Accompanying drawing 5 is magnetic relay drive circuit connection relationship diagram in the present invention.
Accompanying drawing 6 is keystroke handling circuit connecting relation schematic diagram in the present invention.
Embodiment
With reference to the accompanying drawings and examples, the present invention will be further described
Embodiment
As shown in accompanying drawing 1~6, a kind of Self-recover overvoltage-undervoltage protector with creepage protection function, it includes box body and control
Unit processed, control unit include power circuit 1, current sampling circuit 2, voltage sampling circuit 3, microprocessor 4, keystroke handling electricity
Road 5, working state indicating circuit 6, magnetic relay drive circuit 7, magnetic latching relay 8, creepage mutual inductor 9, storage capacitor 10
With chip periphery circuit 11, wherein, the input of power circuit 1 is civil power input, and output end is connected to microprocessor 4, magnetic
On relay drive circuit 7, magnetic latching relay 8 and storage capacitor 10, the input of current sampling circuit 2 is mutual for electric leakage
The leading-out terminal of sensor 9, output end are connected to microprocessor 4, and the input of voltage sampling circuit 3 is inputted for civil power, and output end is connected to
Microprocessor 4, sampled voltage signal is provided for microprocessor 4, the input of keystroke handling circuit 5 is button, and output end is connected to
Microprocessor 4, actuation of keys control signal is provided for microprocessor 4, microprocessor 4 exports two groups of signals, and one group is transported to work
Make condition indication circuit 6, another group is transported to magnetic relay drive circuit 7, by driving magnetic to keep after magnetic relay drive circuit 7
Relay 8.
The input of storage capacitor 10 is connected to power circuit 1, output end connection magnetic latching relay 8, is kept for magnetic
The action of relay 8 provides instantaneous energy；
The input of chip periphery circuit 11 is connected to power circuit 1, and output end connection microprocessor 4, is microprocessor
Device 4 provides power supply；
The input of creepage mutual inductor 9 inputs for civil power.
The power circuit 1 includes decompression capacitor 1C1, discharge resistance 1R1, rectifier bridge 1DB, filter capacitor 1C2, pressure-sensitive electricity
Hinder 1R2, first resistor 1R3, second resistance 1R4,3rd resistor 1R5, the 4th resistance 1R6, voltage-stabiliser tube 1D1, triode 1Q1 and three
Hold voltage-stablizer 1U1, second resistance 1R4,3rd resistor 1R5, voltage-stabiliser tube 1D1 and triode 1Q1 form shunt regulating circuit with after
Magnetic relay drive circuit 7 connects, and three terminal regulator 1U1 output ends are through the first electric capacity 1C3 and the second electric capacity 1C4 and microprocessor
4 connections.
The magnetic relay drive circuit 7 includes the first driving resistance 7R1, the second driving resistance 7R2, the 3rd driving resistance
7R3, the 4th driving resistance 7R4, the first driving electric capacity 7C1, the second driving electric capacity 7C2, the first driving diode 7D1, second drive
Dynamic diode 7D2, the first driving triode 7Q1, the second driving triode 7Q2, the output end of magnetic relay drive circuit 7 connection magnetic
Guard relay 8.
The current sampling circuit 2 includes sample resistance 2R1, and the electric current that creepage mutual inductor creepage mutual inductor 9 is gathered is believed
Number voltage signal is converted to, voltage signal is sent into current-differencing amplifying circuit, then sent after the filtering of electric current low-pass filter circuit
Enter microprocessor 4；Current-differencing amplifying circuit is made up of R34, R35, R36, R37, C8, C20, U3 and filter capacitor C5, C22,
Electric current low-pass filter circuit is made up of R37, C21.
After the line voltage of voltage sampling circuit 3 is depressured by resistance R20, R21, R22, R26, R27, R28 bleeder circuit
The differential amplifier circuit of R17, R23, R29, R31, C12, C17, U6 and filter capacitor C15, C19 composition is sent into, then through R30, C16
Microprocessor 4 is sent into after low-pass filter circuit.
Keystroke handling circuit 5 is made up of K1, R39, C23, push button signalling input microprocessor 4, is inputted as microprocessor 4
Signal.
The operation principle of Self-recover overvoltage-undervoltage protector of the present invention：After obtaining electric from power network, microprocessor 4 is adopted by voltage
Sample circuit 3 continuously detects line voltage, when detecting that line voltage is in normal range (NR), exports two groups of signals, one group of output
To working state indicating circuit 6, normal indicator lamp is bright, and another way exports adhesive pulse signal to magnetic relay drive circuit 7, by
Magnetic relay drive circuit 7 drives the adhesive of magnetic latching relay 8, connects major loop.When line voltage occurs over-pressed or under-voltage,
Microprocessor 4 detects overvoltage or under-voltage condition by voltage sampling circuit 3, exports two groups of signals, and one group exports and gives work shape
State indicating circuit 6, corresponding overvoltage or under-voltage condition indicator lamp are bright, and another group exports release pulse signal and drive electricity to magnetic relay
Road 7, drive magnetic latching relay 8 to discharge by magnetic relay drive circuit 7, cut off major loop, reach overvoltage/undervoltage protection purpose.When
When line voltage recovers normal, microprocessor 4 detects normal condition by voltage sampling circuit 3, exports normal signal to work
Make condition indication circuit 6, over-pressed or under-voltage indicator lamp goes out, and normal indicator lamp is bright, and enters delay timing in 60 seconds, is delayed when 60 seconds
Voltage is all normal in time, exports adhesive pulse signal to magnetic relay drive circuit 7, is driven by magnetic relay drive circuit 7
The adhesive of magnetic latching relay 8, connects major loop, and that restores electricity reaches automatic and recovers purpose.It is logical in "on" position, microprocessor 4
Overcurrent sample circuit 2 continuously detects leakage current signal, if detect that leakage current signal is more than setting value, exports one group immediately
Signal drives magnetic latching relay 8 to discharge to magnetic relay drive circuit 7, magnetic relay drive circuit 7, and cut-out at once is led back
Road, reaches the purpose of protection personal safety, and microprocessor 4 exports another group of signal to working state indicating circuit 6, shown current
In electric leakage gate-dividing state, because electric leakage separating brake when, after must artificially fixing a breakdown, button confirm, turn on automatically major loop, ensure
The security of electricity consumption.The effect of storage capacitor 10 is to provide instantaneous energy for the action of magnetic latching relay 8.Keystroke handling circuit
5 confirm except there is after the separating brake that leak electricity button, while also play the role of in normal work that test protector being capable of separating brake.
The claimed content of the present invention is not limited only to the content described in above example, any to be enlightened by by invention
Technical scheme both fall within protection scope of the present invention.
Claims (3)
1. a kind of Self-recover overvoltage-undervoltage protector with creepage protection function, it includes box body and control unit, control unit bag
Include power circuit (1), current sampling circuit (2), voltage sampling circuit (3), microprocessor (4), keystroke handling circuit (5), work
Make condition indication circuit (6), magnetic relay drive circuit (7), magnetic latching relay (8), creepage mutual inductor (9), storage capacitor
And chip periphery circuit (11) (10), it is characterised in that：Power circuit (1) input inputs for civil power, output end connection
Onto microprocessor (4), magnetic relay drive circuit (7), magnetic latching relay (8) and storage capacitor (10), the electric current
Sample circuit (2) input is creepage mutual inductor (9) leading-out terminal, and output end is connected to microprocessor (4), voltage sampling circuit
(3) input inputs for civil power, and output end is connected to microprocessor (4), provides sampled voltage signal for microprocessor (4), presses
Key process circuit (5) input is button, and output end is connected to microprocessor (4), and actuation of keys control is provided for microprocessor (4)
Signal processed, microprocessor (4) export two groups of signals, and one group is transported to working state indicating circuit (6), another group be transported to magnetic after
Electrical apparatus driving circuit (7), magnetic latching relay (8) is driven by magnetic relay drive circuit (7)；
Storage capacitor (10) input is connected to power circuit (1), output end connection magnetic latching relay (8), is protected for magnetic
Hold relay (8) action and instantaneous energy is provided；
Chip periphery circuit (11) input is connected to power circuit (1), and output end connection microprocessor (4), is micro- place
Manage device (4) and power supply is provided；
Creepage mutual inductor (9) input inputs for civil power；
The current sampling circuit (2) includes sample resistance (2R1), and the current signal that creepage mutual inductor (9) gathers is converted to
Voltage signal, voltage signal is sent into current-differencing amplifying circuit, then microprocessor is sent into after the filtering of electric current low-pass filter circuit
Device (4)；
The voltage sampling circuit (3) is sent into voltage differential amplifying circuit again through voltage LPF electricity after line voltage is depressured
Microprocessor (4) is sent into behind road.
A kind of 2. Self-recover overvoltage-undervoltage protector with creepage protection function as claimed in claim 1, it is characterised in that：It is described
Power circuit (1) includes decompression capacitor (1C1), discharge resistance (1R1), rectifier bridge (1DB), filter capacitor (1C2), piezo-resistance
(1R2), first resistor (1R3), second resistance (1R4), 3rd resistor (1R5), the 4th resistance (1R6), voltage-stabiliser tube (1D1), three
Pole pipe (1Q1) and three terminal regulator (1U1), second resistance (1R4), 3rd resistor (1R5), voltage-stabiliser tube (1D1) and triode
(1Q1) forms shunt regulating circuit and is connected with magnetic relay drive circuit (7), and three terminal regulator (1U1) output end is through the first electricity
Hold (1C3) and the second electric capacity (1C4) is connected with microprocessor (4).
A kind of 3. Self-recover overvoltage-undervoltage protector with creepage protection function as claimed in claim 1, it is characterised in that：It is described
Magnetic relay drive circuit (7) include first driving resistance (7R1), second driving resistance (7R2), the 3rd driving resistance (7R3),
4th driving resistance (7R4), the first driving electric capacity (7C1), the second driving electric capacity (7C2), the first driving diode (7D1), the
Two driving diodes (7D2), the first driving triode (7Q1), the second driving triode (7Q2), magnetic relay drive circuit (7)
Output end connection magnetic latching relay (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310143375.9A CN103311884B (en) | 2013-04-23 | 2013-04-23 | A kind of Self-recover overvoltage-undervoltage protector with creepage protection function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310143375.9A CN103311884B (en) | 2013-04-23 | 2013-04-23 | A kind of Self-recover overvoltage-undervoltage protector with creepage protection function |
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| CN103311884A CN103311884A (en) | 2013-09-18 |
| CN103311884B true CN103311884B (en) | 2017-12-19 |
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| CN103779831B (en) * | 2014-02-10 | 2016-11-23 | 西安阿普顿电力技术有限公司 | SCM Based three-phase self-resetting type over voltage protector |
| CN104836189B (en) * | 2015-04-14 | 2018-01-26 | 华南理工大学建筑设计研究院 | It is a kind of can Self-resetting and remote reset electric protective device and its method |
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| CN106298365A (en) * | 2016-08-08 | 2017-01-04 | 深圳唯创知音电子有限公司 | A kind of control relay circuit and relay |
| CN106229942A (en) * | 2016-09-30 | 2016-12-14 | 中山市拓昊电器有限公司 | A kind of control circuit of earth leakage protective device |
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| CN107276023A (en) * | 2017-08-03 | 2017-10-20 | 合肥锦和信息技术有限公司 | A kind of self-recovering type overvoltage protector circuit |
| CN108471104A (en) * | 2018-05-30 | 2018-08-31 | 浙江凯发电气有限公司 | A kind of Self-recover overvoltage-undervoltage protector and its circuit |
| CN109449875A (en) * | 2018-11-07 | 2019-03-08 | 温州宝翔科技有限公司 | A kind of self- recoverage adjustable current protector |
| CN111725888A (en) * | 2019-03-22 | 2020-09-29 | 上海永继电气股份有限公司 | Relay control device and operation method thereof |
| CN113009252A (en) * | 2021-02-25 | 2021-06-22 | 航天科工空间工程发展有限公司 | Aircraft initiating explosive device detonation control and monitoring circuit |
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