CN202616741U - Under-voltage and over-voltage bidirectional electrical apparatus release - Google Patents
Under-voltage and over-voltage bidirectional electrical apparatus release Download PDFInfo
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- CN202616741U CN202616741U CN 201220250620 CN201220250620U CN202616741U CN 202616741 U CN202616741 U CN 202616741U CN 201220250620 CN201220250620 CN 201220250620 CN 201220250620 U CN201220250620 U CN 201220250620U CN 202616741 U CN202616741 U CN 202616741U
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Abstract
The utility model relates to the field of electrical apparatus releases, and especially relates to a under-voltage and over-voltage bidirectional electrical apparatus release. The electrical apparatus release includes a filter circuit, a starting power supply circuit, an electromagnet for release control, a switch circuit, a control circuit for controlling the on and off of the switch circuit, and a stabilized power supply circuit for supplying power to the switch circuit and the control circuit. The power supply input end of the filter circuit is connected to an electrical network, the power supply output end of the filter circuit is connected to the power supply input end of the starting power supply circuit, and the power supply output end of the starting power supply circuit, the switch circuit, and an electromagnet coil form a series loop. The under-voltage and over-voltage bidirectional electrical apparatus release provided is simple in circuit, large in starting moment, reliable in attraction, and low in coil heating value, as well as can realize the under-voltage and over-voltage bidirectional releasing.
Description
Technical field
The utility model relates to the release field, relates in particular to a kind of under-voltage, overvoltage two way release device.
Background technology
Device for under-voltage releasing equipment is a circuit breaker, especially one of critical elements of frame-type circuit breaker.Under-voltage release is when its terminal voltage is reduced to a certain prescribed limit, makes circuit breaker that a kind of release of delaying time or not having the time-delay disconnection arranged, when supply voltage descends; Even slowly drop in 70% to 35% scope of rated operational voltage; Under-voltage release should operate, and under-voltage release equals 35% o'clock of release rated operational voltage at supply voltage, and under-voltage release should be able to prevent that circuit breaker closing is complete; Moving armature has back-moving spring to eject-thread off in the trip coil dead electricity, coil; When supply voltage is equal to or greater than the rated operational voltage of 85% under-voltage release; Under hot condition; Should be able to guarantee that circuit breaker is reliably closed, trip coil gets electric, and the interior moving armature of coil has the coil electromagnetic force to overcome the spring force suction and keeps certain moment-adhesive.The essence of undervoltage tripping, be prevent circuit breaker subordinate electric equipment be operated under the under-voltage condition electric current excessive after, the effective measures that the electric equipment self-heating increases the weight of.
Existing electromagnetic undervoltage release ubiquity coil heating amount is high, and the little or circuit of device for under-voltage releasing equipment staring torque is problem such as complicacy too; And existing " under-voltage " release does not all have " overvoltage " tripping function.Yet in more occasion, like the night of industrial enterprise, usually there is the overvoltage phenomenon in occasions such as the minor scale power net of small water conservancy generating and self power generation, naval vessel.Make electrical installation under the overvoltage condition, can have a strong impact on its useful life, performance and fail safe or the like.So it is the important means of effective protective circuit breaker subordinate electric equipment safety that overvoltage is threaded off.
The utility model content
The technical problem that the utility model will solve is: the coil heating amount is big when overcoming existing electromagnetic undervoltage release operate as normal, staring torque is little, too problem such as complicacy of not adhesive phenomenon, circuit is often arranged; Especially can not realize the technical problem of overvoltage dropout etc., the utility model provides a kind of under-voltage, overvoltage two way release device.
The utility model solves the technical scheme that its technical problem adopted: a kind of under-voltage, overvoltage two way release device; It is characterized in that: comprise filter circuit, start power circuit, electromagnet, the switching circuit of the control that is used to thread off, be used for the control circuit of control switch connecting and disconnecting of the circuit; And the voltage-stabilized power supply circuit that is used for providing power supply to switching circuit and control circuit; The power input of described filter circuit links to each other with electrical network; The power output end of described filter circuit links to each other with the power input that starts power circuit, and the power output end of described startup power circuit, switching circuit and electromagnet coil constitute series loop;
Described control circuit comprises the SB signal sample circuit that is used for gathering startup power circuit output supply voltage, SA signal sample circuit and the microcontroller circuit that is used to gather line voltage; Described microcontroller circuit has first signal sending end that is used for the control switch connecting and disconnecting of the circuit;
The SB signal sending end of described SB signal sample circuit all is connected with microcontroller circuit with the SA signal sending end of SA signal sample circuit, and described first signal sending end is connected with switching circuit;
Described microcontroller circuit comprises microprocessor: when the SA signal greater than 80% of electrical network rated voltage, and SB connects switching circuit when satisfying predetermined value, i.e. switching circuit and electromagnet formation series loop; When the SA signal be lower than the electrical network rated voltage 50% or be higher than the electrical network rated voltage 120% the time, switching circuit is opened circuit.
In order to realize the highly reliable strong startup of big moment; Make that again the whole caloric value of release is little, described startup power circuit comprises that the decompression capacitor that links to each other with the power output end of filter circuit, the rectification circuit that links to each other with the power output end of decompression capacitor, positive pole link to each other with the dc output end of rectification circuit and the startup electric capacity of minus earth; Start the power output end of the just very said startup power circuit of electric capacity.
For fear of when input voltage is too high, the voltage that starts on the electric capacity is also very high, thereby causes starting capacitance overvoltage and explode damage.Also comprise relay, the normally-closed contact of described relay links to each other with the positive pole that starts electric capacity with the dc output end of rectification circuit respectively, and the coil of described relay is connected with microcontroller circuit, and described microcontroller circuit comprises microprocessor:
When the SA signal greater than 80% of electrical network rated voltage, and SB connects switching circuit when satisfying predetermined value, i.e. switching circuit and electromagnet formation series loop;
When the SA signal less than the electrical network rated voltage 50% the time, switching circuit is opened circuit;
When the SA signal greater than the electrical network rated voltage 120% the time, it is electric that relay is got, its normally-closed contact breaks off;
When the SA signal less than the electrical network rated voltage 120% the time, make relay electric-loss, its normally-closed contact is closed.
For definite delay time, and guarantee the reliable adhesive of electromagnet, described microcontroller circuit comprises
BCD toggle switch: needing the occasion of delayed releasing, different toggle switch combinations is set, after described microprocessor reads this signal, confirming the delay time of delayed releasing;
Microprocessor: if the delay time that the BCD toggle switch is represented is non-vanishing, and when the SA signal less than the electrical network rated voltage 50% after trigger, finish up to delay time, switching circuit is opened circuit.
As preferably, described filter circuit is the EMC circuit, and two-way inhibition is from electrical network and the inner interference signal that produces of release.
Further; Described SB signal sample circuit is located at positive pole and the 3rd divider resistance between the ground and the series connection of the 4th divider resistance that starts electric capacity after comprising series connection successively; Described the 4th divider resistance two ends are parallel with second voltage-stabiliser tube, and described SB signal is the voltage of drawing between the 3rd divider resistance and the 4th divider resistance.
In order to reduce power consumption, be connected with the halfwave rectifier diode behind the filter circuit, the positive pole of described halfwave rectifier diode is connected with the power output end of filter circuit.The power input of described voltage-stabilized power supply circuit is connected with the negative pole of halfwave rectifier diode.The SA signal sample circuit comprises successively negative pole and first divider resistance between the ground and two divider resistances of being located at the halfwave rectifier diode after the series connection; The described second divider resistance two ends are parallel with perhaps first voltage-stabiliser tube of filtered electrical, and described SA signal is the voltage of drawing between first divider resistance and second divider resistance.
Usually, described voltage-stabilized power supply circuit can be the power circuit of switch form, the circuit of series connection step-down form or the reduction voltage circuit of pulse width modulation form.Described switching circuit can be circuit, relay circuit, thyristor circuit or the transistor circuit that power MOS pipe is formed.
Microprocessor in the described microcontroller circuit can be single-chip microcomputer (MCU), SOC(system on a chip) (SOC), CPLD, FPGA or DSP.
Described charging circuit can be the quick-charging circuit that triode, metal-oxide-semiconductor or thyristor are formed.Described discharge circuit can be the constant current discharge circuit that triode or metal-oxide-semiconductor are formed.Described reserve electric capacity is electrochemical capacitor or limitless electric capacity.
The beneficial effect of the utility model is,
1, the startup power circuit is set; After switching circuit was connected, electric charge all was released to solenoid, the voltage on the solenoid on the startup electric capacity; Size decision by the decompression capacitor capacity; And decompression capacitor does not produce active power, has both realized that big moment starts, and makes that again the whole caloric value of release is little;
2, judge in advance in the utility model whether the SA signal satisfies the adhesive condition, judge then whether the SB signal has reached the preliminary filling value.Only after two conditions satisfy simultaneously, just there is single chip circuit control switch circuit to connect electromagnet, guaranteed absolutely adhesive;
3, be provided with the EMC circuit in the startup power circuit, two-way inhibition is from electrical network and the inner interference signal that produces of release;
4, voltage-stabilized power supply circuit and SA signal sample circuit are connected in after the half-wave rectifying circuit, can significantly reduce power consumption;
5, when input voltage is too high, the voltage that starts on the electric capacity is also very high, causes easily starting capacitance overvoltage and the damage of exploding; Increased a relay; When input voltage was too high, the microcontroller circuit control relay broke off normally-closed contact, can effectively protect startup electric capacity;
In sum, the utility model is under-voltage, overvoltage two way release device, and circuit is simple, staring torque is big, adhesive is reliable, and the coil heating amount is little, can realize under-voltage and overvoltage two way release, and control idea is clear.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is that the utility model is under-voltage, the circuit theory diagrams of overvoltage two way release device embodiment 1.
Fig. 2 is that the utility model is under-voltage, the circuit theory diagrams of overvoltage two way release device embodiment 2.
Among the figure 1, the EMC circuit, 2, voltage-stabilized power supply circuit, 3, microcontroller circuit, 4, electromagnet, 5, switching circuit.
Embodiment
Combine accompanying drawing that the utility model is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, the basic structure of the utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
As shown in Figure 1, the utility model is under-voltage, the circuit theory diagrams of overvoltage two way release device embodiment 1.By EMC circuit 1, decompression capacitor CK, bridge rectifier BG, start capacitor C S1, detect the SB signal sample circuit that starts capacitor C S1 voltage, the switching circuit 5 of SA signal sample circuit, voltage-stabilized power supply circuit 2, single chip circuit 3 and control electromagnet 4 break-makes of detection of grid voltage forms.The 1 two-way inhibition of EMC circuit is from electrical network and the inner interference signal that produces of release.Capacitor C K is before electromagnet 4 is switched on action, through charging to starting capacitor C S1 after the bridge rectifier BG rectification.
The SB signal sample circuit is composed in series by being located at the positive pole and the 3rd divider resistance R3 between the ground, the 4th divider resistance R4 that start capacitor C S1 successively.
The SA signal sample circuit comprises successively negative pole and the first divider resistance R1 between the ground and the second divider resistance R2 that is located at halfwave rectifier diode D0 after the series connection, also comprises a filter capacitor CD1 parallelly connected with the second divider resistance R2.After single-chip microcomputer receives sampled signal SA, after the employing rising edge triggers and catches the electrical network cycle and utilize Hanning window interpolation FFT method to calculate the electrical network zero crossing, the effective value of current line voltage.Be connected to halfwave rectifier SA signal sample circuit afterwards, circuit is simple, and oneself power consumption can significantly reduce.
Line voltage is connected between a kind of input L and N of no-voltage delayed release of the utility model.L1 meets decompression capacitor CK after 1 filtering of EMC circuit, and the other end of decompression capacitor CK is received the input of bridge rectifier BG, and N1 connects another input of bridge rectifier BG.The positive output end of bridge rectifier BG is defined as VH, negative output terminal ground connection.
After powering on; Bridge rectifier BG is that pulsating direct current is to starting capacitor C S1 charging with the alternating current circuit rectification; The charging voltage that starts power circuit power output end VH be input ac voltage
doubly;
that be generally 80% electrical network rated voltage Ue doubly, like 248V.Charging voltage VH is produced sampled signal SB and is sent into single chip circuit 3 by the SB signal sample circuit.Charging voltage VH receives an end of electromagnet 4 simultaneously.
By the voltage after the rectifier diode D0 halfwave rectifier, be loaded into voltage-stabilized power supply circuit 2 and SA signal sample circuit.15V (12V) voltage that voltage-stabilized power supply circuit 2 produces is that switching circuit 5 provides power supply, and the 5V of generation (3.3V) voltage is that single chip circuit 3 work provide power supply.The sampled signal SA that the SA signal sample circuit produces, the design effective monitoring scope is 0～130%Ue, then can satisfy requirement under-voltage, the overvoltage monitoring.
In the single chip circuit 3 toggle switch can be set, need the occasion of delayed releasing, different toggle switch combinations is set, after single-chip microcomputer reads this signal, confirm the delay time of delayed releasing.
As shown in Figure 2, the utility model is under-voltage, the circuit theory diagrams of overvoltage two way release device embodiment 2.In order to prevent to start capacitor C S1 overvoltage and the damage of exploding; The normally-closed contact that also comprises relay J 1 relay J 1 links to each other with the positive pole that starts capacitor C S1 with the dc output end of rectification circuit BG respectively; The coil of relay J 1 is connected with microcontroller circuit 3, and microcontroller circuit 3 comprises microprocessor:
When the SA signal greater than 80% of electrical network rated voltage, and SB connects switching circuit 5 when satisfying predetermined value, promptly switching circuit 5 constitutes series loops with electromagnet 4;
When the SA signal less than the electrical network rated voltage 50% the time, switching circuit 5 is opened circuit;
When the SA signal greater than the electrical network rated voltage 120% the time, make relay J 1 electric, its normally-closed contact breaks off;
When the SA signal less than the electrical network rated voltage 120% the time, make relay J 1 dead electricity, its normally-closed contact is closed.
After switching circuit 5 was connected, startup capacitor C S1 went up electric charge and all is released to solenoid, the voltage on the solenoid; Be about 50V, by the size decision of decompression capacitor CK capacity, and decompression capacitor CK does not produce active power; Both realized that big moment started, made again that the whole caloric value of release was little.
The filter capacitor CD1 of second divider resistance R2 two ends parallel connection among the embodiment 1 is replaced by the first voltage-stabiliser tube Z1, increases the parallelly connected second voltage-stabiliser tube Z2 at the 4th divider resistance R4 two ends.When the line voltage overrate 120% the time, the first voltage-stabiliser tube Z1 and the second voltage-stabiliser tube Z2 play the amplitude limit effect.
With above-mentioned desirable embodiment according to the utility model is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (10)
1. under-voltage, overvoltage two way release device; It is characterized in that: comprise filter circuit, start power circuit, electromagnet (4), the switching circuit (5) of the control that is used to thread off, be used for the control circuit of control switch circuit (5) break-make; And the voltage-stabilized power supply circuit (2) that is used for providing power supply to switching circuit (5) and control circuit; The power input of described filter circuit links to each other with electrical network; The power output end of described filter circuit links to each other with the power input that starts power circuit, and the power output end of described startup power circuit, switching circuit (5) constitute series loop with electromagnet (4) coil;
Described control circuit comprises the SB signal sample circuit that is used for gathering startup power circuit output supply voltage, SA signal sample circuit and the microcontroller circuit (3) that is used to gather line voltage; Described microcontroller circuit (3) has first signal sending end that is used for control switch circuit (5) break-make;
The SB signal sending end of described SB signal sample circuit all is connected with microcontroller circuit (3) with the SA signal sending end of SA signal sample circuit, and described first signal sending end is connected with switching circuit (5).
2. under-voltage, overvoltage two way release device as claimed in claim 1, it is characterized in that: described microcontroller circuit (3) comprises microprocessor:
When the SA signal greater than 80% of electrical network rated voltage, and SB connects switching circuit (5) when satisfying predetermined value, promptly switching circuit (5) constitutes series loop with electromagnet (4);
When the SA signal less than the electrical network rated voltage 50% or be higher than the electrical network rated voltage 120% the time, switching circuit (5) is opened circuit.
3. under-voltage, overvoltage two way release device as claimed in claim 1 is characterized in that: described startup power circuit comprises that the decompression capacitor (CK) that links to each other with the power output end of filter circuit, the rectification circuit (BG) that links to each other with the power output end of decompression capacitor (CK), positive pole link to each other with the dc output end of rectification circuit (BG) and the startup electric capacity (CS1) of minus earth; Start the power output end (VH) of the just very said startup power circuit of electric capacity (CS1).
4. under-voltage, overvoltage two way release device as claimed in claim 3; It is characterized in that: also comprise relay (J1); The normally-closed contact of described relay (J1) links to each other with the positive pole that starts electric capacity (CS1) with the dc output end of rectification circuit (BG) respectively; The coil of described relay (J1) is connected with microcontroller circuit (3), and described microcontroller circuit (3) comprises microprocessor:
When the SA signal greater than 80% of electrical network rated voltage, and SB connects switching circuit (5) when satisfying predetermined value, promptly switching circuit (5) constitutes series loop with electromagnet (4);
When the SA signal less than the electrical network rated voltage 50% the time, switching circuit (5) is opened circuit;
When the SA signal greater than the electrical network rated voltage 120% the time, make relay (J1) electric, its normally-closed contact breaks off;
When the SA signal less than the electrical network rated voltage 120% the time, make relay (J1) dead electricity, its normally-closed contact is closed.
5. like claim 2 or 4 described under-voltage, overvoltage two way release devices, it is characterized in that: described microcontroller circuit (3) comprises
BCD toggle switch: needing the occasion of delayed releasing, different toggle switch combinations is set, after described microprocessor reads this signal, confirming the delay time of delayed releasing;
Microprocessor: if the delay time that the BCD toggle switch is represented is non-vanishing, and when the SA signal less than the electrical network rated voltage 50% after trigger, finish up to delay time, switching circuit (5) is opened circuit.
6. under-voltage, overvoltage two way release device as claimed in claim 1 is characterized in that: described filter circuit is EMC circuit (1).
7. under-voltage, overvoltage two way release device as claimed in claim 1; It is characterized in that: described SB signal sample circuit is located at positive pole and the 3rd divider resistance (R3) between the ground and the 4th divider resistance (R4) that starts electric capacity (CS1) after comprising series connection successively; Described the 4th divider resistance (R4) two ends are parallel with second voltage-stabiliser tube (Z2), and described SB signal is the voltage of drawing between the 3rd divider resistance (R3) and the 4th divider resistance (R4).
8. under-voltage, overvoltage two way release device as claimed in claim 1 is characterized in that: be connected with halfwave rectifier diode (D0) behind the filter circuit, the positive pole of described halfwave rectifier diode (D0) is connected with the power output end of filter circuit.
9. under-voltage, overvoltage two way release device as claimed in claim 8 is characterized in that: the power input of described voltage-stabilized power supply circuit (2) is connected with the negative pole of halfwave rectifier diode (D0).
10. under-voltage, overvoltage two way release device as claimed in claim 8; It is characterized in that: the SA signal sample circuit comprises successively is located at the negative pole of halfwave rectifier diode (D0) and first divider resistance (R1) between the ground and second divider resistance (R2) after the series connection; Described second divider resistance (R2) two ends are parallel with filter capacitor (CD1) or first voltage-stabiliser tube (Z1), and described SA signal is the voltage of drawing between first divider resistance (R1) and second divider resistance (R2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250620 CN202616741U (en) | 2012-05-30 | 2012-05-30 | Under-voltage and over-voltage bidirectional electrical apparatus release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250620 CN202616741U (en) | 2012-05-30 | 2012-05-30 | Under-voltage and over-voltage bidirectional electrical apparatus release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202616741U true CN202616741U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220250620 Withdrawn - After Issue CN202616741U (en) | 2012-05-30 | 2012-05-30 | Under-voltage and over-voltage bidirectional electrical apparatus release |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202616741U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709875A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Under-voltage and over-voltage two-way release |
| CN103915299A (en) * | 2014-04-17 | 2014-07-09 | 东莞辰达电器有限公司 | Automatic reset ground fault breaker and control circuit structure of automatic reset ground fault breaker |
-
2012
- 2012-05-30 CN CN 201220250620 patent/CN202616741U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709875A (en) * | 2012-05-30 | 2012-10-03 | 江苏国星电器有限公司 | Under-voltage and over-voltage two-way release |
| CN102709875B (en) * | 2012-05-30 | 2014-11-05 | 江苏国星电器有限公司 | Under-voltage and over-voltage two-way release |
| CN103915299A (en) * | 2014-04-17 | 2014-07-09 | 东莞辰达电器有限公司 | Automatic reset ground fault breaker and control circuit structure of automatic reset ground fault breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121219 Effective date of abandoning: 20141105 |
|
| RGAV | Abandon patent right to avoid regrant |