CN202696128U - Over-voltage protection module - Google Patents
Over-voltage protection module Download PDFInfo
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- CN202696128U CN202696128U CN 201220320044 CN201220320044U CN202696128U CN 202696128 U CN202696128 U CN 202696128U CN 201220320044 CN201220320044 CN 201220320044 CN 201220320044 U CN201220320044 U CN 201220320044U CN 202696128 U CN202696128 U CN 202696128U
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Abstract
The utility model discloses an over-voltage protection module and belongs to the technical field of low-voltage electrical appliances. The over-voltage protection module comprises a power circuit, an input circuit, an output circuit, a microprocessor circuit and a voltage sampling circuit, wherein the voltage sampling circuit is connected with a three-phase main loop and the microprocessor circuit; the microprocessor circuit is connected with the input circuit and the output circuit; the input circuit at least comprises a channel of external signal input; the output circuit at least comprises two groups of independently-controlled output contacts; and the power circuit supplies working voltage to the microprocessor circuit, the voltage sampling circuit and the input circuit. The over-voltage protection module has the advantages that the generality of three-pole and four-pole molded case circuit breakers can be realized; and under the condition that the structure of a circuit breaker body is not changed, over-voltage and low-voltage protection functions of the circuit breaker are flexibly added, a protection function of the circuit breaker is greatly completed, and an automatic re-closing function of an after-current molded case circuit breaker can be flexibly realized.
Description
Technical field
The utility model belongs to the low voltage electrical apparatus technology field, is specifically related to a kind of overvoltage protective module.
Background technology
In Industry Control, power consumption equipment all adopts three phase mains usually, and a lot of power consumption equipments in use have higher requirement to the working power that provides.Continuous increase along with power consumption, the overvoltage problem of thing followed power circuit, use to the various power consumption equipments of enterprise and family causes safely very large threat, and is also more and more by the loss that overvoltage causes, and the power consumption equipment of a pickup generation is more and more responsive.Variation along with power consumption equipment; protection to power consumption equipment also is gradually improved; low-voltage circuit breaker in the low-voltage distribution loop is important protection electric elements; basic three-stage protection function is provided; conventional low-pressure plastic shell circuit breaker; defencive function is generally take electric current as main; unusual for voltage; existing low-pressure plastic shell circuit breaker can detect unusual voltage by adopting overvoltage protective module or device; compare with predetermined value at the voltage of major loop breaker of plastic casing is disconnected, realize the purpose of protection subordinate's line load and equipment.The overvoltage protective module of existing breaker of plastic casing usually needs access N phase, mainly for be four-pole circuit breaker, and often inapplicable for three-pole breaker, limited to a certain extent the range of application of overvoltage protective module on breaker of plastic casing.In addition, the overvoltage protective module of existing breaker of plastic casing does not often have outside input yet, can not expand other function.Usually this series products also only has the output contact of one group of independent control, is unfavorable for expanding output function, such as to the control of motor-operating mechanism (operating unit of circuit breaker) etc.
In view of above-mentioned prior art, be necessary existing overvoltage protective module is improved, technical scheme described below produces under this background.
Summary of the invention
The purpose of this utility model is to provide a kind of overvoltage protective module; can realize that three, four utmost point breaker of plastic casing are general; and with outside input function; possess at least two groups and independently control output contact; electric operating can be controlled and shunt release (coil) can be controlled again; can be assembled on the circuit breaker with modular form, flexible, the greatly perfect again defencive function of circuit breaker.
The purpose of this utility model reaches like this; a kind of overvoltage protective module; comprise power circuit; input circuit; output circuit; microcontroller circuit and voltage sampling circuit; described voltage sampling circuit is connected with the three-phase major loop; voltage sampling circuit connects microcontroller circuit; microcontroller circuit is connected with output circuit with input circuit; described input circuit comprises the input of one tunnel external signal at least; described output circuit comprises the output contact of two groups of independent controls at least, and power circuit is microcontroller circuit; voltage sampling circuit and input circuit provide suitable operating voltage.
In a specific embodiment of the present utility model, described overvoltage protective module also comprises indicating circuit and initialization circuit, and described indicating circuit is connected with microcontroller circuit with initialization circuit.
In another specific embodiment of the present utility model, described voltage sampling circuit comprises one road differential amplifier circuit at least, and the output of each road differential amplifier circuit is connected to separately microcontroller circuit.
In another specific embodiment of the present utility model, described power circuit comprises DC power supply circuit for generating and reference power supply circuit for generating, and described DC power supply circuit for generating provides the second DC power supply VDD for voltage sampling circuit, microcontroller circuit and input circuit; Described reference power supply circuit for generating provides reference level VREF for voltage sampling circuit.
In another specific embodiment of the present utility model, the input of described power circuit can be taken from the end of incoming cables of circuit breaker independently.
Also have in the specific embodiment of the present utility model, described indicating circuit adopts one or both indicating modes in LED light or the LCDs, is used in real time indication line voltage state.
More of the present utility model and in specific embodiment, described initialization circuit is made of DIP switch or rotary code switch, be used for setting voltage and operate time.
In of the present utility model and then specific embodiment, described input circuit can be isolated form input circuit or non-isolation type input circuit, and perhaps both have concurrently.
Of the present utility model again more and in specific embodiment, the input signal of described input circuit is level or the contact signal of representative residual current acting, or external control signal.
In again of the present utility model and then specific embodiment, the output contact of described output circuit is a kind of in mechanical contact or the electronic contact.
The utility model is owing to having adopted said structure, and power circuit is had no progeny even circuit breaker divides from the direct power taking in circuit breaker end of incoming cables, still can make the overvoltage protective module normal operation.Indicating circuit can be indicated the line voltage state in real time, and reminding user is in time processed problem, plays the safeguard protection effect; Voltage sampling circuit utilizes differential amplifier circuit to gather simultaneously three-phase voltage, can detect overvoltage or the low pressure of any two-phase; Microcontroller circuit can carry out real-time judge, adjusts default standard value, makes protection more accurate; Set delay time by initialization circuit in addition, can effectively avoid when moment occurring during power network overvoltage owing to cutting off unnecessary work that electrical network causes the user and interrupt and damage.Overvoltage protective module can be realized the general of three, four utmost point breaker of plastic casing; and possess at least two groups and independently control output contact; can control the motor-operating mechanism action; can control again shunt release (coil) action; overvoltage protective module can be installed on the circuit breaker with modular form; simple and convenient; in the situation that do not change the breaker body structure; increased neatly the function of circuit breaker overvoltage, low-voltage variation; the greatly perfect defencive function of circuit breaker, and can realize flexibly the automatic reclosing function of residual current breaker of plastic casing.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is voltage sampling circuit schematic diagram of the present utility model.
Fig. 3 (a) is DC power supply circuit for generating schematic diagram of the present utility model.
Fig. 3 (b) is reference power supply circuit for generating schematic diagram of the present utility model.
Fig. 4 is the electric principle connection layout of initialization circuit of the present utility model, indicating circuit and microcontroller circuit.
Fig. 5 (a) is the input circuit schematic diagram of an embodiment of the present utility model.
Fig. 5 (b) is the input circuit schematic diagram of another embodiment of the present utility model.
Fig. 6 (a) is the output circuit schematic diagram with one group of output contact of an embodiment of the present utility model.
Fig. 6 (b) is the output circuit schematic diagram with another group output contact of an embodiment of the present utility model.
Fig. 7 (a) is the output circuit schematic diagram with one group of output contact of another embodiment of the present utility model.
Fig. 7 (b) is the output circuit schematic diagram with another group output contact of another embodiment of the present utility model.
Embodiment
In order to make the public can fully understand technical spirit of the present utility model and beneficial effect; the applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but the applicant is not restriction to technical scheme to the description of embodiment, anyly makes form and immaterial variation all should be considered as protection range of the present utility model according to the utility model design.
See also Fig. 1, a kind of overvoltage protective module comprises power circuit, input circuit, output circuit, microcontroller circuit and voltage sampling circuit, and the output of voltage sampling circuit connects microcontroller circuit, and microcontroller circuit is connected with output circuit with input circuit.Described overvoltage protective module also comprises indicating circuit and initialization circuit, and described indicating circuit is connected with microcontroller circuit with initialization circuit.The input of described voltage sampling circuit is connected to end of incoming cables or the leading-out terminal of major loop circuit breaker, and is connected with the three-phase major loop, obtains voltage measurement signal by difference channel.Described input circuit comprises the input of one tunnel external signal at least, and described output circuit comprises the output contact of two groups of independent controls at least.Described microcontroller circuit carries out AD to voltage measurement signal and is converted to digital signal, indicate, show, and with the parameter of setting relatively, if surpass the protection value of setting, then send the output contact of instruction control output circuit closed or disconnect.The output contact of described output circuit can be any of mechanical contact or electronic contact, makes breaker open operation by the action element action that is connected with output contact, reaches the purpose of overvoltage protection or low-voltage variation.Action element can be shunt opening coil, motor-operating mechanism etc.Indicating circuit is indicated the line voltage parameter in real time.The input of described power circuit can be taken from the end of incoming cables of major loop circuit breaker independently, and power circuit provides suitable operating voltage for microcontroller circuit, voltage sampling circuit, input circuit.
The input of described voltage sampling circuit is connected to end of incoming cables or the leading-out terminal of major loop circuit breaker, gets A, B, C phase line line voltage between any two, and the method for this kind voltage sample is applicable to three utmost points or four-pole circuit breaker.If only be used for the phase voltage between the desirable A of four-pole circuit breaker voltage sampling circuit, B, C phase line and the neutral line N.Three, four extremely general for taking into account, the utility model take get A, B, C mutually between any two line voltage as example, phase voltage to obtain principle identical, as long as A, B, C phase line form difference channel with center line N respectively.Described voltage sampling circuit comprises one road differential amplifier circuit at least, and the output of each road differential amplifier circuit is connected to separately microcontroller circuit.See also Fig. 2, described voltage sampling circuit comprises operational amplifier N1A, N1B, N1C and resistance R 1～R12, and in the present embodiment, operational amplifier N1A, N1B, N1C adopt LM324.One terminating resistor R10, one end of resistance R 1 also is connected with the end of incoming cables of major loop circuit breaker or the A phase line of leading-out terminal, the end of the other end connecting resistance R3 of resistance R 1 and 2 pin of operational amplifier N1A, 1 pin of the other end of resistance R 3 and operational amplifier N1A connects 18 pin of microcontroller N3 in the microcontroller circuit, the end of the 3 pin connecting resistance R2 of operational amplifier N1A and an end of resistance R 4, the end of the other end connecting resistance R5 of resistance R 2 also is connected with the end of incoming cables of major loop circuit breaker or the B phase line of leading-out terminal, the other end of resistance R 5 and an end of resistance R 7 are connected 6 pin and are connected with operational amplifier N1B, 7 pin of the other end of resistance R 7 and operational amplifier N1B connect 17 pin of microcontroller N3 in the microcontroller circuit, the end of the 5 pin connecting resistance R6 of operational amplifier N1B and an end of resistance R 8, the end of the other end connecting resistance R9 of resistance R 6 also is connected with the end of incoming cables of major loop circuit breaker or the C phase line of leading-out terminal, the other end of resistance R 9 and an end of resistance R 11 are connected 9 pin and are connected with operational amplifier N1C, 8 pin of the other end of resistance R 11 and operational amplifier N1C connect 15 pin of microcontroller N3 in the microcontroller circuit, the end of the 10 pin connecting resistance R12 of operational amplifier N1C and the other end of resistance R 10, the other end of resistance R 4, the other end of the other end of resistance R 8 and resistance R 12 meets reference level VREF jointly, 4 pin of operational amplifier N1A meet the second DC power supply VDD, the 11 pin ground connection of operational amplifier N1A.Three road differential amplifier circuits output of voltage sampling circuit is got R1=R2=R5=R6=R9=R10, R3=R4=R7=R8=R11=R12 corresponding to the measuring-signal of three-route voltage.The output of differential amplifier circuit can use principle of stacking to calculate, and each signal is put on separately differential amplifier circuit, obtains corresponding output, and the output of several signal independent roles is superposeed obtains final result at last.Use the computational methods of Analogical Electronics, easily obtain
Order
UAB=(UA-UB), UBC=(UB-UC), UCA=(UC-UA), then
U
Ab=KUAB+VREF, U
Bc=KUBC+VREF, U
Ca=KUCA+VREF, visible output voltage is corresponding with input voltage.
See also Fig. 3 (a) and Fig. 3 (b), described power circuit comprises DC power supply circuit for generating and reference power supply circuit for generating, and described DC power supply circuit for generating provides the second DC power supply VDD for voltage sampling circuit, microcontroller circuit and input circuit; Described reference power supply circuit for generating provides reference level VREF for voltage sampling circuit.DC power supply circuit can only be used decompression capacitor and current-limiting resistance take the three-phase power taking as example during the mode of employing two-phase power taking therein on the way.The DC power supply circuit for generating comprises capacitor C 1～C5, resistance R 13～R16, diode D1～D6, voltage-stabiliser tube Z1 and power supply chip N2, and in the present embodiment, power supply chip N2 adopts MAX1615.The A phase line of the end of incoming cables of one termination major loop circuit breaker of capacitor C 1, the end of the other end connecting resistance R13 of capacitor C 1, the positive pole of another terminating diode D1 of resistance R 13 and the negative pole of diode D2, the negative pole of the negative pole of diode D1 and diode D3, the end that the negative pole of diode D5 is connected with resistance R connects, the positive pole of diode D3 and an end of resistance R 14 are connected negative pole and are connected with diode D4, one end of another termination capacitor C 2 of resistance R 14, the B phase line of the end of incoming cables of another termination major loop circuit breaker of capacitor C 2, the positive pole of diode D5 and an end of resistance R 15 are connected negative pole and are connected with diode D6, one end of another termination capacitor C 3 of resistance R 15, the C phase line of the end of incoming cables of another termination major loop circuit breaker of capacitor C 3, the negative pole of the other end of resistance R 16 and voltage-stabiliser tube Z1, one end of capacitor C 4,1 pin of power supply chip N2 with are connected pin and connect and export the first DC power supply VCC, 3 pin of power supply chip N2 are connected with the end that 4 pin are connected with capacitor C and export the second DC power supply VDD, the positive pole of diode D2, the positive pole of diode D4, the positive pole of diode D6, the positive pole of voltage-stabiliser tube Z1, the other end of capacitor C 4,2 pin of power supply chip N2 and the other end common ground of capacitor C 5.The end of incoming cables of major loop circuit breaker is taken from the input of described DC power supply circuit for generating independently, the voltage of major loop is carried out step-down and by carrying out bridge rectifier after resistance R 13～R15 current limliting by decompression capacitor C1～C3, output pulsating direct current behind current-limiting resistance R16 by voltage-stabiliser tube Z1 voltage stabilizing, filter capacitor C4 filtering, export the first DC power supply VCC, power supply chip N2 carries out step-down and voltage stabilizing to the first DC power supply VCC, and the output after the voltage stabilizing is as the second DC power supply VDD.Described reference power supply circuit for generating comprises resistance R 17, R18 and operational amplifier N1D, and operational amplifier N1D adopts LM324.One termination, the second DC power supply VDD of resistance R 17, the end of the other end connecting resistance R18 of resistance R 17 and 12 pin of operational amplifier N1D, 13 pin of operational amplifier N1D are connected with 14 pin and output reference level VREF, the other end ground connection of resistance R 18.Divider resistance R17, R18 obtain reference level VREF through operational amplifier N1D, as the reference level of differential amplifier circuit after the second DC power supply VDD is carried out dividing potential drop.Consider the actual requirements such as power consumption, voltage-stabiliser tube Z1 also can realize by the voltage stabilizing circuit that is comprised of power transistor.Reference level VREF also can produce with the reference voltage chip.
Overvoltage protective module described in the utility model also comprises indicating circuit and initialization circuit, and described indicating circuit is connected with microcontroller circuit with initialization circuit.Described indicating circuit can adopt one or both indicating modes of LED light or LCDs, is used in real time indication line voltage state, describes as an example of LED light example in the present embodiment.Described initialization circuit is made of DIP switch or rotary code switch, is used for setting voltage and operate time, describes as an example of code switch example in the present embodiment.Specifically see also Fig. 4, described indicating circuit comprises resistance R 21～R23 and light-emitting diode H1～H3, the end of resistance R 21, R22, R23 connects respectively 19,20,1 pin of microcontroller N3 in the microcontroller circuit, the other end of resistance R 21, R22, R23 is the positive pole of sending and receiving optical diode H1, H2, H3 respectively, the negative pole common ground of light-emitting diode H1, H2, H3; Described initialization circuit is made of code switch S2, and code switch S2 described herein adopts P36S, and 1,4,3 pin of code switch S2 connect respectively 14,13,12 pin of microcontroller N3 in the microcontroller circuit, 2, the 5 pin common grounds of code switch S2.This only take a code switch as example, can expand to many.Please consult Fig. 4, described microcontroller circuit comprises microcontroller N3, resistance R 19, R20, R24, capacitor C 6～C8, crystal oscillator Y1, diode D7 and switch S 1 again, and in the utility model, described microcontroller N3 adopts M16C.The end of one terminating resistor R24 of switch S 1 and 10 pin of microcontroller N3, the end of the 3 pin connecting resistance R20 of microcontroller N3, one end of the positive pole of diode D7 and capacitor C 8,4 pin of microcontroller N3 connect an end of capacitor C 7 and the end of crystal oscillator Y1, one end of another termination capacitor C 6 of crystal oscillator Y1 and 6 pin of microcontroller N3, the end of the 8 pin connecting resistance R19 of microcontroller N3, the other end of resistance R 24,7 of microcontroller N3,16 pin, the other end of resistance R 19, the negative pole of the other end of resistance R 20 and diode D7 connects the second DC power supply VDD, the other end of switch S 1 jointly, 5 pin of microcontroller N3, the other end of capacitor C 6, the other end common ground of the other end of capacitor C 7 and capacitor C 8.Wherein, resistance R 20, capacitor C 8 and diode D7 form reset circuit, guarantee the microcontroller N3 normal operation that powers on, and the while reset circuit also can adopt reset chip; Capacitor C 6, C7 and crystal oscillator Y1 form crystal oscillating circuit; Resistance R 24 and switch S 1 form button circuit, are used for resetting of relevant function, as resetting with the locking behind the automatic reclosing function.The signal that microcontroller circuit is sent here voltage sampling circuit carries out the AD conversion, obtain the digital signal corresponding to main circuit voltage, and with set point or predetermined threshold ratio, at voltage during greater than superpotential threshold value or less than the threshold value of low-voltage, after the time-delay of setting or predetermined threshold, send actuating signal, the contact action of control output circuit, and control indicator light and carry out the state indication, data and the current states such as magnitude of voltage when the band liquid crystal, also can be shown.Light-emitting diode H1 adopts green light, lights the expression normal operation, and Light-Emitting Diode H2 adopts red light, lights the expression locking, and Light-Emitting Diode H3 adopts red light, glittering expression overvoltage or overvoltage action failure, normal bright expression low pressure or low voltage activate fault.On the other hand, when magnitude of voltage is normal, if detect input circuit the signal input is arranged, such as the residual current acting signal, then microcontroller circuit is after certain time-delay, the corresponding contacts action of control output circuit makes the motor-operating mechanism that links to each other with output circuit drive residual current circuit breaker and again closes a floodgate.The residual current fault continues to occur after overlapping, and then no longer overlaps operation, then locking is pressed switch S 1 and can be removed locking.
In the utility model, described input circuit can be isolated form input circuit or non-isolation type input circuit, and perhaps both have concurrently.See also Fig. 5 (a), show isolated form input circuit schematic diagram, comprise resistance R 25, R26, diode D8 and optocoupler 01, the one end of incoming cables in-1 end of one termination circuit breaker of resistance R 25,1 pin of another termination optocoupler 01 of resistance R 25,2 pin of optocoupler 01 connect the positive pole of diode D8, the negative pole of diode D8 connects another end of incoming cables in-2 end of circuit breaker, 11 pin of microcontroller N3 in the one termination microcontroller circuit of 4 pin of optocoupler 01 and resistance R 26, another termination second DC power supply VDD of resistance R 26,3 pin ground connection of optocoupler 01.See also Fig. 5 (b), described input circuit adopts the non-isolation type input circuit, comprise resistance R 27～R29 and transistor V1, the one end of incoming cables in-1 end of one termination circuit breaker of resistance R 27, the end of the other end connecting resistance R28 of resistance R 27 and the base stage of transistor V1,11 pin of microcontroller N3 in the one termination microcontroller circuit of the collector electrode of transistor V1 and resistance R 29, another termination second DC power supply VDD of resistance R 29, the emitter of the other end of resistance R 28 and transistor V1 connects another end of incoming cables in-2 end of circuit breaker, and common ground.The input signal of input circuit is level or the contact signal of representative residual current acting, or external control signal, when the signal input is arranged, optocoupler 01 conducting, in is low level, and when not having input signal, optocoupler 01 not conducting, in is high level, microcontroller N3 has known the no signal input according to the level situation of change of in, and then carry out relevant instruction, and resistance R 25～R26 is current-limiting resistance, diode D8 is the counnter attack diode.The course of work of non-Isolation input circuit is similar, and resistance R 27, R29 are current-limiting resistance, and resistance R 28 is divider resistance, and transistor V1 is as electronic switch.
In the utility model, described output circuit comprises the output contact of two groups of independent controls at least, and described output contact can be any of mechanical contact or electronic contact.See also Fig. 6 (a) and Fig. 6 (b), described output circuit adopts mechanical contact, comprise resistance R 30, R31, transistor V2, V3, diode D9, D10, with relay K 1, K2,9 pin of microcontroller N3 in the one termination microcontroller circuit of resistance R 30, the base stage of another termination transistor V2 of resistance R 30, the collector electrode of transistor V2 connects the positive pole of diode D9 and 16 pin of relay K 1, the negative pole of diode D9 is succeeded 1 pin of electrical equipment K1,5 pin of relay K 1 and 8 pin access respectively input out-1 end and the out1-2 end of the action element of circuit breaker, as the output contact of one group of independent control, the grounded emitter of transistor V2; 2 pin of microcontroller N3 in the one termination microcontroller circuit of resistance R 31, the base stage of another termination transistor V3 of resistance R 31, the collector electrode of transistor V3 connects the positive pole of diode D10 and 16 pin of relay K 2, the negative pole of diode D10 is succeeded 1 pin of electrical equipment K2,5 pin of relay K 2 and 8 pin access respectively input out2-1 end and the out2-2 end of the action element of circuit breaker, as the output contact of the independent control of another group, the grounded emitter of transistor V3.When KZ1 is high level, transistor V2 conducting behind current-limiting resistance R30, the coil of control relay K1 gets electric, output contact closed (or disconnection), and KZ1 is when being low level, not conducting of transistor V2, the coil of relay K 1 must not be electric, and the output contact state does not change.The level of KZ1 is by microcontroller N3 control, and level changes when meeting the demands, and is low level when normal.The course of work of relay K 2 is identical therewith.See also Fig. 7 (a) and Fig. 7 (b), described output circuit adopts electronic contact, comprise resistance R 32, R33 and optocoupler 02,03,1 pin of optocoupler 02 connects 9 pin of microcontroller N3 in the microcontroller circuit, the end of 2 pin connecting resistance R32 of optocoupler 02,3 pin of optocoupler 02 and 4 pin access respectively input out1-2 end and the out1-1 end of the action element of circuit breaker, as the output contact of one group of independent control, the other end ground connection of resistance R 32; 1 pin of optocoupler 03 connects 2 pin of microcontroller N3 in the microcontroller circuit, the end of 2 pin connecting resistance R33 of optocoupler 03,3 pin of optocoupler 03 and 4 pin access respectively input out2-2 end and the out2-1 end of the action element of circuit breaker, as the output contact of the independent control of another group, the other end ground connection of resistance R 33.Optocoupler 02 is obstructed when KZ1 is low level, is output as high resistant, and optocoupler 02 conducting is output as low-resistance when KZ1 is high level, and resistance R 32 is current-limiting resistance.The course of work of optocoupler 03 is identical therewith.Can certainly adopt solid-state relay or power transistor to form the electronic contact output circuit, not repeat them here.
Described overvoltage protective module adopt stand alone type or with the mode of circuit breaker assembly unit, if adopt the split mounting type module then to be installed in left side or the right side of circuit breaker.Described overvoltage protective module can form auto recloser with residual current breaker of plastic casing and motor-operating mechanism; it receives the residual current protection action signal of residual current breaker of plastic casing input; output control signals to motor-operating mechanism, the control motor-operating mechanism is realized automatic reclosing to the residual current breaker of plastic casing.Described overvoltage protective module also has the under-voltage protection function, and communication function can be expanded the separation indicating module.
Claims (10)
1.
A kind of overvoltage protective module; it is characterized in that comprising power circuit, input circuit, output circuit, microcontroller circuit and voltage sampling circuit; described voltage sampling circuit is connected with the three-phase major loop; voltage sampling circuit connects microcontroller circuit; microcontroller circuit is connected with output circuit with input circuit; described input circuit comprises the input of one tunnel external signal at least; described output circuit comprises the output contact of two groups of independent controls at least, and power circuit provides suitable operating voltage for microcontroller circuit, voltage sampling circuit and input circuit.
2.
A kind of overvoltage protective module according to claim 1 is characterized in that described overvoltage protective module also comprises indicating circuit and initialization circuit, and described indicating circuit is connected with microcontroller circuit with initialization circuit.
3.
A kind of overvoltage protective module according to claim 1 is characterized in that described voltage sampling circuit comprises one road differential amplifier circuit at least, and the output of each road differential amplifier circuit is connected to separately microcontroller circuit.
4.
A kind of overvoltage protective module according to claim 1, it is characterized in that described power circuit comprises DC power supply circuit for generating and reference power supply circuit for generating, described DC power supply circuit for generating provides the second DC power supply VDD for voltage sampling circuit, microcontroller circuit and input circuit; Described reference power supply circuit for generating provides reference level VREF for voltage sampling circuit.
5.
A kind of overvoltage protective module according to claim 1 is characterized in that the input of described power circuit can take from the end of incoming cables of circuit breaker independently.
6.
A kind of overvoltage protective module according to claim 2 is characterized in that described indicating circuit adopts one or both indicating modes of LED light or LCDs, is used in real time indication line voltage state.
7.
A kind of overvoltage protective module according to claim 2 is characterized in that described initialization circuit is made of DIP switch or rotary code switch, is used for setting voltage and operate time.
8.
A kind of overvoltage protective module according to claim 1 is characterized in that described input circuit can be isolated form input circuit or non-isolation type input circuit, and perhaps both have concurrently.
9.
A kind of overvoltage protective module according to claim 1, the input signal that it is characterized in that described input circuit are level or the contact signal of representative residual current acting, or external control signal.
10.
A kind of overvoltage protective module according to claim 1, the output contact that it is characterized in that described output circuit are a kind of in mechanical contact or the electronic contact
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320044 CN202696128U (en) | 2012-07-04 | 2012-07-04 | Over-voltage protection module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220320044 CN202696128U (en) | 2012-07-04 | 2012-07-04 | Over-voltage protection module |
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| Publication Number | Publication Date |
|---|---|
| CN202696128U true CN202696128U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220320044 Expired - Lifetime CN202696128U (en) | 2012-07-04 | 2012-07-04 | Over-voltage protection module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049937A (en) * | 2021-03-11 | 2021-06-29 | 东莞市沃德普自动化科技有限公司 | Illumination light source with operating condition monitoring |
-
2012
- 2012-07-04 CN CN 201220320044 patent/CN202696128U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049937A (en) * | 2021-03-11 | 2021-06-29 | 东莞市沃德普自动化科技有限公司 | Illumination light source with operating condition monitoring |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |