CN1959894A - Flameproof protection switch - Google Patents
Flameproof protection switch Download PDFInfo
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- CN1959894A CN1959894A CN 200610154740 CN200610154740A CN1959894A CN 1959894 A CN1959894 A CN 1959894A CN 200610154740 CN200610154740 CN 200610154740 CN 200610154740 A CN200610154740 A CN 200610154740A CN 1959894 A CN1959894 A CN 1959894A
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Abstract
The multifunctional flameproof protection switch includes current sensor, zero sequence mutual inductor, test button, reset button, control circuit, electromagnetic trip, two pieces of static contactor and moving contactor. Characters are: one end of moving contactors is setup at circuit board, an insulated hook is setup at middle, and a moving contactor is setup at the other end respectively; reset spring is sheathed on the reset button; being setup at base and configured opposite to insulated hook, reset hook is connected to iron core; static contactor is setup at one end of the static piece, and circuit board is at the other end of the static piece; N pole is passed through the zero sequence mutual inductor. L pole is passed through both of the inductor and current sensor. Using iron core to pull the reset hook makes release between reset hook and insulated hook so as to disconnect electrical source. Advantages are: large tripping force, quick action, and high sensitivity etc.
Description
Technical field:
The present invention relates to a kind of highly sensitive Flameproof protection switch, is a kind of multi-functional flameproof protection devices such as short-circuit protection, overload protection, overvoltage protection, overtemperature protection, earth leakage protective that have.
Technical background:
Along with science and technology development, the mains switch with fire-proof function is required for people gradually.Flameproof protection switch will provide the reliability guarantee for protecting property safeties such as the person and electrical equipment.Flameproof protection switch installs overload protective device additional and realizes on described power protection switch.Existing overload protective device mainly adopts bimetal leaf; thereby make its flexural deformation realize cutting off the electricity supply after the energising heating, when one times of electric current of overload, generally needed to trip in several seconds to half an hour; thereby deenergization fast, and break-time is influenced by environmental temperature.When electrical appliance transships for a certain reason, electrical heating, on fire, even after burning, overload protective device does not also have the phenomenon of tripping operation to happen occasionally, thereby does not have effective protective effect.Special in the small household appliance of rated current below 1A, its defective is more obvious.Simultaneously, existing flameproof protection socket has only single overload protection function.
Summary of the invention:
The above-mentioned defective that prior art that the present invention will solve exists, provide that a kind of tripping force is big, quick action, highly sensitive, reliability is high and the Flameproof protection switch that has creepage protection function concurrently.
The present invention also will provide a kind of Flameproof protection switch with over-voltage protecting function.
The present invention also will provide a kind of Flameproof protection switch with overheat protective function.
The present invention also will provide a kind of Flameproof protection switch with anti-surge defencive function.
The present invention also will provide a kind of Flameproof protection switch with short-circuit protection function.
The present invention also will provide a kind of Flameproof protection switch with overvoltage tripping alarm function.
The technical scheme that addresses the above problem employing is: Flameproof protection switch, comprise two static contacts and the movable contact spring of the over-current sensor, zero-sequence transformer, test button, reset button, control circuit, magnetictrip, the N utmost point and the L utmost point that are arranged on the circuit board, described magnetictrip comprises skeleton, main tripping coil, iron core and spring; It is characterized in that described two movable contact spring one ends are arranged on the circuit board, the centre is provided with an insulation hook, and the other end is respectively equipped with a moving contact; Suit back-moving spring on the described reset button, bottom are provided with the hook that resets with the relative configuration of described insulation hook, and the described hook that resets is connected with iron core; One end of described two static contacts is respectively equipped with a fixed contact, and the other end is arranged on the circuit board; The N utmost point passes zero-sequence transformer, and the L utmost point passes zero-sequence transformer and over-current sensor simultaneously.
Flameproof protection switch of the present invention; its mechanical part makes it to thread off with the hook that insulate and realizes deenergization by the iron core direct pull hook that resets, thus have simple in structure, tripping force big, quick action, highly sensitive, working stability reliable, long service life, low cost and other advantages.
What is more important, Flameproof protection switch of the present invention has adopted over-current sensor and zero-sequence transformer simultaneously, thereby has overload protection and creepage protection function concurrently.Zero-sequence transformer is used to detect leakage current, and phase line of power and center line all pass zero-sequence transformer, and in the winding access control circuit of zero-sequence transformer.Electrical equipment is when operate as normal, because the current value of phase line and center line is identical, magnetic direction is opposite, cancels out each other in magnetic field, and the induced voltage in the winding of zero-sequence transformer is zero, and control circuit is failure to actuate.When leakage current appears in circuit, the current value of phase line of power and center line is unequal, will in the winding of zero-sequence transformer, induce faint electric leakage signal voltage like this, this induced signal voltage amplifies, compares, overturns through control circuit IC is that high level triggers the controllable silicon conducting, the iron core of solenoid produces magnetic attraction moves iron core inwards, the pulling tripping mechanism, deenergization.
Over-current sensor of the present invention is also different with traditional current transformer, and traditional current transformer is that former limit winding is inserted power supply, induces measuring current at winding.And over-current sensor of the present invention is not established former limit winding, and phase line of power is directly passed the overcurrent instrument transformer.When electric current surpasses rated operational current, will be at the faint signal voltage of inducing of over-current sensor.When this induced signal voltage reached setting value, control circuit triggered the controllable silicon deenergization.Over-current sensor design volume of the present invention can design very for a short time; as 6 * φ 15mm; so protection socket volume can design very for a short time; and because over-current sensor just can play supervisory function bit when no-voltage is above; thereby reaction is sensitiveer; especially be applied to the small household appliance of rated current below 1A, its advantage is more remarkable.
As a further improvement on the present invention, described control circuit comprise be used to receive the signal of telecommunication of described zero-sequence transformer and over-current sensor winding and compare, amplify, overturn the control chip of back output triggering signal and under the effect of control chip triggering signal the controllable silicon of conducting tripping coil.
Described control chip IC can be any standard structure, because of the fireproofing over loading protecting volume of switch less, preferred single-row model VG54123, winding one end of described zero-sequence transformer is connected to 1 pin of control chip, the negative electrode of voltage-stabiliser tube, an end of the 3rd current-limiting resistance, an end of second filter capacitor and an end of ground capacity, and the other end is connected to the anode of voltage-stabiliser tube, an end, an end of second current-limiting resistance, the other end of the 3rd current-limiting resistance, the other end of second filter capacitor and an end of build-out resistor of anti-surge switch; 2 pin of another termination control chip of described build-out resistor; 3 pin of another termination control chip of described ground capacity; The other end and an end of power adjustments resistance, the other end of another termination power adjustments resistance and the other end of anti-surge switch of winding one termination second current-limiting resistance of described over-current sensor.Described anti-surge switch is a normally closed switch coaxial with reset button; anti-surge normally closed switch disconnects earlier before hand is pressed reset button; when moving contact contacts rear defence surge normally closed switch closure again with fixed contact; the produced simultaneously moment surge voltage that prevents and avoided resetting, the influence that protection switch is resetted.
The different name termination source phase line of described main tripping coil, termination silicon controlled anode of the same name; Described silicon controlled negative electrode connects 3 pin of control chip, an end of anti-interference capacitor, an end of first filter capacitor, an end of first matching capacitance and the negative pole 4 of full-wave rectifying circuit, and the described silicon controlled control utmost point connects 7 pin of control chip, the other end of anti-interference capacitor and an end of second matching capacitance; Another output 2 of described full-wave rectifying circuit connects first current-limiting resistance, and the anode of the other end sending and receiving optical diode of first current-limiting resistance, the negative electrode of described light-emitting diode connect the other end of first filter capacitor and 8 pin of control chip; 6 pin of another termination control chip of described second matching capacitance; 4 pin of another termination control chip of described first matching capacitance and 5 pin; The input 1,3 of described full-wave rectifying circuit is connected respectively to phase line of power and center line.
Further improve as of the present invention again, also be wound with a short circuit tripping coil on the described skeleton, described short circuit tripping coil is connected on the phase line of major loop, and the different name end of described main tripping coil links to each other with the end of the same name of short circuit tripping coil.When electrical equipment produces short circuit, produce instantaneous large-current at the short-circuit protection coil, iron core action drive is resetted link up with and the dropout of insulation hook, thus generation tripping operation action.
Further improve analog leakance test circuit that constitutes by the switch series connection of simulation leak resistance and test button of cross-over connection on the phase line of on the zero-sequence transformer center line in front and zero-sequence transformer back again as of the present invention.The two ends of the described test button switch thermistor in parallel and second piezo-resistance.Supply voltage just often, test button disconnects, the thermistor and second piezo-resistance are high-impedance state; When supply voltage is higher than rated voltage or surge voltage and thunderstorm hour arranged, second piezo-resistance moment was low resistive state, be equivalent to press test button, analog leakance test, the electric current that passes the phase line of zero-sequence transformer and center line is just unequal, will induce faint voltage signal in zero-sequence transformer, amplifying, compare, overturn through IC is that high level triggers the controllable silicon conducting by the output of 8 pin, the positive half cycle that makes alternating current is by the electromagnetic trip coil, iron core action drive is resetted link up with and the dropout of insulation hook, thereby produce the tripping operation action, deenergization.
When circuit produces when overheated, correspondingly, thermistor, then also conducting of analog leakance test circuit, the conducting that is triggered of control circuit controllable silicon, magnetictrip is threaded off rapidly, deenergization.
In order to guarantee control chip when the overvoltage or have thunderstorm hour not burnt out, the power line two ends of described full-wave rectifying circuit first piezo-resistance in parallel.
Also insert a sound light alarming circuit that constitutes by the 3rd current-limiting resistance, piezoelectric ceramic piece and the series connection of starter neon bulb between described power supply phase line and the center line.When the supply voltage overrun, voltage-sensitive ceramic produces weak voltage, and neon bulb will be luminous, produces alarm signal.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a mechanical structure schematic diagram of the present invention.
The upward view of Fig. 2 Fig. 1.
Fig. 3 is the circuit diagram of control circuit of the present invention.
Embodiment
With reference to Fig. 1, Fig. 2, the mechanical structure part of Flameproof protection switch of the present invention comprises two static contacts 12 and the movable contact spring 3 of over-current sensor 1, zero-sequence transformer 2, test button 19, reset button 16, control circuit 17, magnetictrip, the N utmost point and the L utmost point.Described magnetictrip comprises skeleton 21, is wound on the main tripping coil 4 that comprises on the skeleton 21, around the short circuit tripping coil 5 of main tripping coil 4 outsides and shared iron core 6 and spring 7.
With reference to Fig. 3; the control circuit of Flameproof protection switch of the present invention; receive the signal of telecommunication of described zero-sequence transformer 2 and the signal of telecommunication of over-current sensor 1 winding, comparing, amplify, overturn at control chip IC is to trigger the controllable silicon VT1 conducting that is connected on the main tripping coil 4 by high level.
Described control chip IC is single-row VG54123 type, winding L 1 one ends of described zero-sequence transformer 2 are connected to 1 pin of control chip IC, the negative electrode of voltage-stabiliser tube D2, the end of the 3rd current-limiting resistance R5, the end of the second filter capacitor C5 and the end of ground capacity C6, and the other end is connected to the anode of voltage-stabiliser tube D2, an end, the end of the second current-limiting resistance R4, the other end of the 3rd current-limiting resistance R5, the other end of the second filter capacitor C5 and the end of build-out resistor R6 of anti-surge K switch 2; 2 pin of another termination control chip IC of described build-out resistor R6; 3 pin of another termination control chip IC of described ground capacity C6; The other end and an end of power adjustments resistance R 3, the other end of another termination power adjustments resistance R 3 and the other end of anti-surge K switch 2 of the winding L 2 one terminations second current-limiting resistance R4 of described current sensor 1.
The different name termination phase line of described main tripping coil L4 (being the part 4 among Fig. 1), the anode of termination controllable silicon VT1 of the same name; The negative electrode of described controllable silicon VT1 connects 3 pin (being the negative pole of rectifier power source) of control chip IC, the end of anti-interference capacitor C1, the end of the first filter capacitor C2, the end of the first matching capacitance C3 and the output 4 of full-wave rectifying circuit, and the control utmost point of described controllable silicon VT1 connects the other end of anti-interference capacitor C1 and the end of the second matching capacitance C4; Another output 2 of described full-wave rectifying circuit meets the first current-limiting resistance R1, the anode of the other end sending and receiving optical diode LED of the first current-limiting resistance R1, the negative electrode of described LED connect the other end of the first filter capacitor C2 and 8 pin of control chip IC (being the positive pole of rectifier power source); 6 pin of another termination control chip IC of the described second matching capacitance C4; 4 pin and 5 pin of another termination control chip IC of the described first matching capacitance C3; Be connected respectively to phase line of power and center line behind input 1, the 3 first piezo-resistance RV1 in parallel of described full-wave rectifying circuit D1, D2, D3, D4.
Short circuit tripping coil L3 (being the part 5 among Fig. 1) is connected on the phase line of major loop, and the different name end of described main tripping coil L4 links to each other with the end of the same name of short circuit tripping coil L3.
Analog leakance test circuit that constitutes by K switch 1 series connection of simulation leak resistance R2 and test button 19 of cross-over connection on the phase line of on the zero-sequence transformer center line in front and zero-sequence transformer back.The two ends of the described test button K switch 1 thermistor R θ in parallel and the second piezo-resistance RV2.
Also insert a sound light alarming circuit that constitutes by the 3rd current-limiting resistance R7, piezoelectric ceramic piece Y and starter neon bulb S series connection between described power supply phase line and the center line.
The operation principle of Flameproof protection switch of the present invention is as follows:
When pressing reset button, switch is energising just; When pressing test button, switch is outage just.When causing short circuit, overload, overvoltage, overheated, electric leakage by various different reasons in the circuit loop, protective device will trip immediately, deenergization, protection personal safety and electrical appliance equipment.
One, energising
When pressing reset button 16, the hook 8 that resets that is connected by rotating shaft will be under the promotion of spring 7, and fixing insulation is linked up with 9 closely on movable contact spring 3, and articulates.When hand was decontroled, because the effect of back-moving spring contacts moving contact 10 with fixed contact 11, power supply indicator 18 (LED among Fig. 3) was bright, finishes energising work.
Two, disconnect
When pressing test button 19, zero-sequence transformer 2 induces a faint simulation electrical leakage voltage signal, amplifying, compare, overturn through IC integrated circuit 17 is high level, by the output of 5 pin, trigger controllable silicon VT, make its conducting, main simultaneously tripping coil 4 energisings, generation magnetic field, iron core in the coil 6 is spurred inwards, hook draws back, and makes tripping mechanism dropout, deenergization, and indicator light extinguishes.
When cause short circuit, the stall of motor oil starvation or power consumption equipment to make moist electric current when increasing in the circuit loop because of wire insulation is aging; over-current sensor 1 will induce faint signal voltage; the same with simulation electrical leakage voltage signal, make that protective device is threaded off rapidly, deenergization.
When electric leakage being arranged in the circuit loop or when having the people to get an electric shock, zero-sequence transformer will induce faint electric leakage signal voltage, the same with simulation electrical leakage voltage signal, make that protective device is threaded off rapidly, deenergization.Overvoltage protection is controlled by RV2; Overtemperature protection is controlled by R θ; Short-circuit protection is controlled by L4.Simultaneously, Flameproof protection switch because of the tripping operation of various failure causes after, piezoelectric ceramic piece Y and starter neon bulb S will produce sound and light alarm immediately.
Claims (9)
1, Flameproof protection switch, two static contacts (12) and the movable contact spring (3) that comprise the over-current sensor (1), zero-sequence transformer (2), test button (19), reset button (16), control circuit, magnetictrip, the N utmost point and the L utmost point that are arranged on the circuit board (13), described magnetictrip comprise skeleton (21), main tripping coil (4,5), iron core (6) and spring (7); It is characterized in that described two movable contact springs (3) one ends are arranged on the circuit board (13), the centre is provided with an insulation hook (9), and the other end is respectively equipped with a moving contact (10); Described reset button (16) goes up suit back-moving spring (15), and the bottom is provided with the hook (8) that resets with (9) the relative configuration of described insulation hook, and the described hook (8) that resets is connected with iron core (6); One end of described two static contacts (12) is respectively equipped with a fixed contact (11), and the other end is arranged on the circuit board (13); The N utmost point passes zero-sequence transformer (2), and the L utmost point passes zero-sequence transformer (2) and over-current sensor (1) simultaneously.
2, Flameproof protection switch as claimed in claim 1 is characterized in that described control circuit comprises that the control chip (IC) of triggering signal is exported in the signal of telecommunication that is used to receive described zero-sequence transformer (2) and the induction of over-current sensor (1) winding and the back that compares, amplifies, overturn and the controllable silicon (VT1) of conducting master tripping coil (4) under the effect of control chip (IC) triggering signal.
3, Flameproof protection switch as claimed in claim 2, it is characterized in that described control chip (IC) is single-row VG54123 type, winding (L1) end of described zero-sequence transformer (2) is connected to 1 pin of control chip (IC), the negative electrode of voltage-stabiliser tube (D2), one end of the 3rd current-limiting resistance (R5), one end of one end of second filter capacitor (C5) and ground capacity (C6), the other end is connected to the anode of voltage-stabiliser tube (D2), one end of anti-surge switch (K2), one end of second current-limiting resistance (R4), the other end of the 3rd current-limiting resistance (R5), one end of the other end of second filter capacitor (C5) and build-out resistor (R6); 2 pin of another termination control chip (IC) of described build-out resistor (R6); 3 pin of another termination control chip (IC) of described ground capacity (C6); The other end of winding (L2) termination second current-limiting resistance (R4) of described over-current sensor (1) and an end of power adjustments resistance (R3), the other end of the other end of another termination power adjustments resistance (R3) and anti-surge switch (K2).
4, Flameproof protection switch as claimed in claim 3, it is characterized in that described main tripping coil (4, different name termination source phase line L4), the anode of termination controllable silicon of the same name (VT1); The negative electrode of described controllable silicon (VT1) connects 3 pin of control chip (IC), an end of anti-interference capacitor (C1), an end of first filter capacitor (C2), an end of first matching capacitance (C3) and the negative pole 4 of full-wave rectifying circuit (D1, D2, D3, D4), and the control utmost point of described controllable silicon (VT1) connects 7 pin of control chip (IC), the other end of anti-interference capacitor (C1) and an end of second matching capacitance (C4); Another output 2 of described full-wave rectifying circuit connects first current-limiting resistance (R1), the anode of the other end sending and receiving optical diode (LED) of first current-limiting resistance (R1), the negative electrode of described light-emitting diode (LED) connect the other end of first filter capacitor (C2) and 8 pin of control chip (IC); 6 pin of another termination control chip (IC) of described second matching capacitance (C4); 4 pin and 5 pin of another termination control chip (IC) of described first matching capacitance (C3); The input 1,3 of described full-wave rectifying circuit (D1, D2, D3, D4) is connected respectively to phase line of power and center line.
5, Flameproof protection switch as claimed in claim 4; it is characterized in that also being wound with on the described skeleton (21) a short circuit tripping coil (L3,5); described short circuit tripping coil (L3,5) is connected on the phase line of major loop, and the different name end of described main tripping coil (L4,4) links to each other with the end of the same name of short circuit tripping coil (L3,5).
6, Flameproof protection switch as claimed in claim 5 is characterized in that analog leakance test circuit that is made of switch (K1) series connection of simulation leak resistance (R2) and test button (19) of cross-over connection on the phase line of on the zero-sequence transformer center line in front and zero-sequence transformer back.
7, Flameproof protection switch as claimed in claim 6 is characterized in that the two ends thermistor (R θ) in parallel and second piezo-resistance (RV2) of described test button switch (K1).
8, Flameproof protection switch as claimed in claim 7 is characterized in that power line two ends first piezo-resistance (RV1) in parallel of described full-wave rectifying circuit (D1, D2, D3, D4).
9,, it is characterized in that also inserting between described power supply phase line and the center line warning circuit that constitutes by the 3rd current-limiting resistance (R7), piezoelectric ceramic piece (Y) and starter neon bulb (S) series connection as any one described Flameproof protection switch of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101547406A CN100501897C (en) | 2006-11-16 | 2006-11-16 | Flameproof protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101547406A CN100501897C (en) | 2006-11-16 | 2006-11-16 | Flameproof protection switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1959894A true CN1959894A (en) | 2007-05-09 |
| CN100501897C CN100501897C (en) | 2009-06-17 |
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ID=38071517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101547406A Active CN100501897C (en) | 2006-11-16 | 2006-11-16 | Flameproof protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100501897C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651272B (en) * | 2008-08-13 | 2011-08-03 | 浙江正泰建筑电器有限公司 | Fire-proof and electric leakage-proof safety plug |
| CN101651273B (en) * | 2008-08-13 | 2011-08-03 | 浙江正泰建筑电器有限公司 | Single magnet type electric leakage protection socket |
| CN104868328A (en) * | 2015-06-08 | 2015-08-26 | 辽宁兴隆百货集团有限公司 | Temperature-control type fireproof safety socket |
| CN111769011A (en) * | 2020-06-06 | 2020-10-13 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Quick release for current-limiting circuit breaker |
| CN112098892A (en) * | 2020-09-18 | 2020-12-18 | 新兴铸管股份有限公司 | Electricity leakage alarm circuit for electricity utilization equipment |
-
2006
- 2006-11-16 CN CNB2006101547406A patent/CN100501897C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651272B (en) * | 2008-08-13 | 2011-08-03 | 浙江正泰建筑电器有限公司 | Fire-proof and electric leakage-proof safety plug |
| CN101651273B (en) * | 2008-08-13 | 2011-08-03 | 浙江正泰建筑电器有限公司 | Single magnet type electric leakage protection socket |
| CN104868328A (en) * | 2015-06-08 | 2015-08-26 | 辽宁兴隆百货集团有限公司 | Temperature-control type fireproof safety socket |
| CN111769011A (en) * | 2020-06-06 | 2020-10-13 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Quick release for current-limiting circuit breaker |
| CN111769011B (en) * | 2020-06-06 | 2022-04-15 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Quick release for current-limiting circuit breaker |
| CN112098892A (en) * | 2020-09-18 | 2020-12-18 | 新兴铸管股份有限公司 | Electricity leakage alarm circuit for electricity utilization equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100501897C (en) | 2009-06-17 |
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Effective date of registration: 20081219 Address after: Liushi CHINT Industrial Park, Zhejiang, Yueqing Province, China: 325604 Applicant after: Zhejiang Chint Building Electrics Co., Ltd. Address before: Liushi CHINT Industrial Park, Zhejiang, Yueqing Province, China: 325604 Applicant before: Chint Group Co., Ltd. |
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