CN202840473U - Three-phase four-wire high-power electronic-control leakage protection switch - Google Patents

Abstract

The utility model discloses a three-phase four-wire high-power electronic-control leakage protection switch, and relates to the technical field of control for low-voltage electric appliances. The three-phase four-wire high-power electronic-control leakage protection switch comprises a magnetic ring CH, a detection winding L1, a driving circuit QD, an execution winding L2, a dynamic breaking switch K2, a rectification power supply ZY, a control relay, a control relay of a live wire A, a control relay of a live wire B, a control relay of a live wire C, a stop switch TK and a starting switch QK. The magnetic ring CH, the detection winding L1, the driving circuit QD, the execution winding L2 and the dynamic breaking switch K2 form a leakage detection device, and the rectification power supply ZY, the control relay, the control relay of the live wire A, the control relay of the live wire B, the control relay of the live wire C, the stop switch TK and the starting switch QK form a circuit interrupting device. The three-phase four-wire high-power electronic-control leakage protection switch has the advantages of small size, high power capacity and sensitivity, long service life and the like, and can be used for protection control for three-phase four-wire user circuits with high power consumption and protection control for high-power three-phase electric appliances.

Description

A kind of three-phase and four-line large power electric control leakage switch

Technical field

The utility model relates to low-voltage electrical apparatus control technology field, particularly a kind of three-phase and four-line large power electric control leakage switch.

Background technology

Leakage switch is a kind of low-voltage electrical apparatus commonly used, is mainly used in preventing the generation of electric leakage accident, and the operating principle of its switch is: at an iron core two windings, main winding and auxiliary winding are arranged; Main winding also has two windings: be respectively input current winding (that is: three live wire windings) and output current winding (that is: zero line winding); Without when electric leakage, input current and output current equate, the vector of two magnetic fluxs and be zero on iron core just can not induce electromotive force at auxiliary winding, otherwise will form by induced voltage on the auxiliary winding, through the amplifier pushing executing mechanism, makes switch trip.Existing three-phase leakage switch mostly adopts mechanical trip formula contact apparatus, and its volume is larger, but its power that can carry is really smaller; Simultaneously, because its tripgear is the mechanical trip formula, the contact of its contact is uneven on the one hand, easily burns out the contact, and on the other hand, easily there was a mechanical failure.

Summary of the invention

For the deficiency that prior art exists, technical problem to be solved in the utility model provides that a kind of small volume, load power are larger, highly sensitive, the three-phase and four-line leakage switch of long service life.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is a kind of three-phase and four-line large power electric control leakage switch of design: be by magnet ring CH, detect winding L ₁, drive circuit QD, carry out winding L ₂With the dynamic circuit breaker K switch ₂Consist of; Also include the tripper that is consisted of by rectifier power source ZY, control relay, live wire A control relay, live wire B control relay, live wire C control relay and shutdown switch TK, starting switch QK;

In described control relay, be provided with one group of moving contact J ₁And J _{1`</sub>, two groups of fixed contact J <sub>2</sub>And J <sub>2`}J ₃And J _{3`</sub>And make contact J <sub>4</sub>, fixed contact J <sub>2</sub>Connect J <sub>3`}, J _2`Connect J ₃The zero line side of the coil J of control relay connects zero line input line L _o, its live wire end connects the output of shutdown switch TK, and the input of shutdown switch TK connects starting switch QK and make contact J ₄Output after the parallel connection, starting switch QK and make contact J ₄Input after the parallel connection connects the dynamic circuit breaker K switch ₂Output;

The live wire input of described rectifier power source ZY connects the output of shutdown switch TK, and its zero line input connects zero line input line L _oThe output of rectifier power source ZY connects respectively the moving contact J of control relay ₁And J _1`

The two ends of the coil JA of live wire A control relay (employing magnetic latching relay) connect respectively fixed contact J ₃And J _3`, be provided with a break contact J in the live wire A control relay _A, this moving contact J _ATwo ends respectively with live wire A input line L _AWith live wire A inlet wire L _{A advances}Origin or beginning connect;

The two ends of the coil JB of live wire B control relay (employing magnetic latching relay) connect respectively fixed contact J ₃And J _3`, be provided with a break contact J in the live wire B control relay _B, this moving contact J _BTwo ends respectively with live wire B input line L _BWith live wire B inlet wire L _{B advances}Origin or beginning connect;

The two ends of the coil JC of live wire C control relay (employing magnetic latching relay) connect respectively fixed contact J ₃And J _3`, be provided with a break contact J in the live wire C control relay _C, this moving contact J _CTwo ends respectively with live wire C input line L _CWith live wire C inlet wire L _{C advances}Origin or beginning connect;

Live wire A inlet wire L _{A advances}, live wire B inlet wire L _{B advances}, live wire C inlet wire L _{C advances}With zero line inlet wire L _{0 advances}Pass magnet ring CH; Detect winding L ₁Be wrapped in magnet ring CH, its two ends connect drive circuit QD; Carry out winding L ₂Two ends connect drive circuit QD, dynamic circuit breaker K switch ₂Device is being carried out winding L ₂Side; The dynamic circuit breaker K switch ₂Input connect live wire C input line L _C

Returning apparatus has by test switch K ₁With test resistance R ₁The hookup that is in series, the zero line inlet wire L before the magnet ring CH is passed in the end connection of this hookup _{0 advances}, the live wire A inlet wire L behind the magnet ring CH is passed in other end connection _{A advances}

Three-phase and four-line large power electric control leakage switch of the present utility model, the power supply that the magnet ring in the existing leakage switch of utilization and detection, driving and execution unit are controlled tripper; Tripper then adopts small volume, magnetic latching relay that power is larger, use its outage and positive pressurization does not disconnect, the reverse characteristic of pressurization disconnection, the contact conversion of the back discharge when utilizing the rectifier power source outage and control relay, control conducting and the disconnection of magnetic relay, thereby cut off three live wire inlet wires, reach in the situation that small volume can carry the purpose of relatively high power.Simultaneously, because the cut-out of three live wire inlet wires is to be finished by the larger magnetic latching relay of load power, therefore its sensitivity is higher, and the contact is difficult to get and damages, and therefore, its useful life is longer.

Per sample test, under the situation of equal volume, the utility model is compared with existing like product, and its power that can carry surpasses more than two times, and surpass more than one times useful life.If when the control magnetic relay of each phase adopts mode in parallel one or two in parallel or more identical control magnetic relay, can realize the multiplication of bearer cap.

Description of drawings

Fig. 1 is principle schematic of the present utility model.

Among the figure: L _ALive wire A input line, L _BLive wire B input line, L _CLive wire C input line, L ₀The zero line input line, L _{A advances}Live wire A inlet wire, L _{B advances}Live wire B inlet wire, L _{C advances}Live wire C inlet wire, L _{0 advances}Be the zero line inlet wire, ZY is rectifier power source, and J is the coil of control relay, J ₁And J _{1`</sub>One group of moving contact of control relay, J <sub>2</sub>And J <sub>2`}And J ₃And J _3`Two groups of fixed contacts of control relay, J ₄Be the make contact of control relay, JA is the coil of live wire A control relay, J _ABe the break contact of live wire A control relay, JB is the coil of live wire B control relay, J _BBe the break contact of live wire B control relay, JC is the coil of live wire C control relay, J _CBe the break contact of live wire C control relay, TK is shutdown switch, and QK is starting switch, and CH is magnet ring, L ₁Be to detect winding, QD is drive circuit, L ₂To carry out winding, K ₂The dynamic circuit breaker switch, K ₁Test switch, R ₁It is test resistance.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further described.Following explanation is to adopt the mode that exemplifies, but protection range of the present utility model should not be limited to this.

The present embodiment is by magnet ring CH, detects winding L ₁, drive circuit QD, carry out winding L ₂, the dynamic circuit breaker K switch ₂, rectifier power source ZY, control relay, live wire A control relay, live wire B control relay, live wire C control relay, shutdown switch TK and starting switch QK consist of, and magnet ring CH, detects winding L ₁, drive circuit QD, carry out winding L ₂, the dynamic circuit breaker K switch ₂Form earth detector, rectifier power source ZY, control relay, live wire A control relay, live wire B control relay, live wire C control relay, shutdown switch TK and starting switch QK form tripper.

Control relay adopts AC relay, in be provided with one group of moving contact J ₁And J _{1`</sub>, two groups of fixed contact J <sub>2</sub>And J <sub>2`}, J ₃And J _{3`</sub>And make contact J <sub>4</sub>Fixed contact J <sub>2</sub>Connect J <sub>3`}, J _2`Connect J ₃, consist of the commutation combination, when outage, form reverse voltage; Make contact J ₄QK is in parallel with starting switch, forms self-locking when starting.

The live wire end of the coil J of control relay is connected with the output of shutdown switch TK, its zero line side and zero line input line L ₀Connect; The input of shutdown switch TK connects make contact J ₄With the output after starting switch QK is in parallel, make contact J ₄Be connected the dynamic circuit breaker K switch with the input after the starting switch QK parallel connection ₂Output; The dynamic circuit breaker K switch ₂Input connect live wire C input line L _C(also can connect live wire A input line L _APerhaps live wire B input line L _B).

The live wire input of rectifier power source ZY is connected with the output of shutdown switch TK, its zero line input and zero line input line L ₀Connect; The output of rectifier power source ZY connects respectively the moving contact J of control relay ₁And J _1`, for the coil JA of live wire A control relay and the coil JB of live wire B control relay and the coil JC of live wire C control relay provide power supply.

The two ends of the coil JA of live wire A control relay (employing magnetic latching relay) connect respectively fixed contact J ₃And J _3`, the break contact J in the live wire A control relay _ATwo ends connect respectively live wire A input line L _AWith live wire A inlet wire L _{A advances}Origin or beginning, live wire A inlet wire L _{A advances}For load provides A phase power supply.

The two ends of the coil JB of live wire B control relay (employing magnetic latching relay) connect respectively fixed contact J ₃And J _3`, the break contact J in the live wire B control relay _BTwo ends connect respectively live wire B input line L _BWith live wire B inlet wire L _{B advances}Origin or beginning, live wire B inlet wire L _{B advances}For load provides B phase power supply.

The two ends of the coil JC of live wire C control relay (employing magnetic latching relay) connect respectively fixed contact J ₃And J _3`, the break contact J in the live wire C control relay _CTwo ends connect respectively live wire C input line L _CWith live wire C inlet wire L _{C advances}Origin or beginning, live wire C inlet wire L _{C advances}For load provides C phase power supply.

Magnet ring CH is circular magnetic core, wherein passes live wire A inlet wire L _{A advances}, live wire B inlet wire L _{B advances}, live wire C inlet wire L _{C advances}With zero line inlet wire L _{0 advances}Detect winding L ₁Install around on magnet ring CH, and connect drive circuit QD, for it provides induced voltage; Carry out winding L ₂The supporting execution action bar that can automatically recover that is equipped with of side, in the end fitting dynamic circuit breaker K switch of this execution action bar ₂, drive circuit QD and execution winding L ₂Connect, for it provides drive current.

Test switch K ₁With test resistance R ₁Series connection consists of hookup, and the zero line inlet wire L before the magnet ring CH is passed in the end connection of this hookup _{0 advances}, the live wire A inlet wire L behind the magnet ring CH is passed in other end connection _{A advances}

During startup, press starting switch QK, by zero line input line L ₀With live wire C input line L _CThrough K ₂After provide power supply for rectifier power source ZY and control relay together, at this moment, the control relay action, the forward current of rectifier power source ZY output is by J _{1`</sub>, J <sub>2`}, J ₃, flow to separately the coil JC of coil JB, live wire C control relay of coil JA, the live wire B control relay of live wire A control relay after, again through J _3`, J ₂, J ₁, get back to rectifier power source ZY.At this moment, break contact J _A, break contact J _BWith break contact J _CBe communicated with respectively live wire A input line L _AWith live wire A inlet wire L _{A advances}Connection, live wire B input line L _BWith live wire B inlet wire L _{B advances}Connection, live wire C input line L _CWith live wire C inlet wire L _{C advances}Be communicated with, for load provides three phase mains.Meanwhile, the make contact J of control relay ₄And close, form self-locking.

In the use procedure, when electric leakage occurring in the load circuit, at this moment, pass the live wire A inlet wire L of magnet ring CH _{A advances}, live wire B inlet wire L _{B advances}With live wire C inlet wire L _{C advances}The electric current of middle inflow and the zero line inlet wire L that passes magnet ring CH _{0 advances}The electric current of middle outflow does not wait, thereby, detect winding L ₁On induce voltage, and be transported to drive circuit QD and amplify, after amplifying, flow to the execution winding L ₂, drive the execution action bar action of its side, thereby so that device in the dynamic circuit breaker K switch of this execution action boom end ₂Disconnect, and then cut off the live wire that leads to rectifier power source ZY and control relay.At this moment, rectifier power source ZY and control relay decompression, on the one hand, the make contact J of control relay ₄Disconnect; On the other hand, the moving contact J of control relay ₁And J _{1`</sub>Reset, at this moment, J <sub>1</sub>Connect J <sub>3</sub>, J <sub>1`}Connect J _{3`</sub>Meanwhile, the electric capacity among the rectifier power source ZY can discharge in the moment of outage, by J <sub>1`}Through J _3`Flow to respectively the coil JA of live wire A control relay, the coil JB of live wire B control relay and the coil JC of live wire C control relay, consist of oppositely pressurization, impel break contact J _A, break contact J _BWith break contact J _CDisconnect (that is: tripping operation), thereby, live wire A input line L cut off respectively _AWith live wire A inlet wire L _{A advances}Connection, live wire B input line L _BWith live wire B inlet wire L _{B advances}Connection, live wire C input line L _CWith live wire C inlet wire L _{C advances}Connection, load outage.Detect winding L thereafter, ₁Decompression is carried out winding L ₂Recover the dynamic circuit breaker K switch ₂Recover; Owing to make contact J this moment ₄Disconnect, thereby rectifier power source ZY and control relay be pressurization not, therefore can not recover action.

After the leak current fault in the load circuit is got rid of, in the time of need to restoring electricity, press starting switch QK, with aforementioned the same, at this moment, the live wire that leads to rectifier power source ZY and control relay is connected, and rectifier power source ZY and control relay restore electricity, the control relay action, the forward power supply of rectifier power source ZY output is by J _{1`</sub>, J <sub>2`}, J ₃, flow to separately coil JA, the coil JB of live wire B control relay, the coil JC of live wire C control relay of live wire A control relay, again through J _3`, J ₂, J ₁, get back to rectifier power source ZY.Because it is opposite by voltage that capacitor discharge is loaded on the coil JC of coil JB, live wire C control relay of coil JA, the live wire B control relay of live wire A control relay when tripping to be carried in voltage on the coil JC of coil JB, live wire C control relay of coil JA, the live wire B control relay of live wire A control relay this moment, therefore, break contact J _A, break contact J _BWith break contact J _CBe communicated with live wire A input line L _AWith live wire A inlet wire L _{A advances}Connection, live wire B input line L _BWith live wire B inlet wire L _{B advances}Connection, live wire C input line L _CWith live wire C inlet wire L _{C advances}Being communicated with, is load supplying again.

When needs quit work, press shutdown switch TK, at this moment, with the dynamic circuit breaker K switch ₂The principle that disconnects is the same, has cut off respectively live wire A input line L _AWith live wire A inlet wire L _{A advances}Connection, live wire B input line L _BWith live wire B inlet wire L _{B advances}Connection, live wire C input line L _CWith live wire C inlet wire L _{C advances}Connection, load outage.

When the needs test, press test switch K ₁, electric current is by the live wire A inlet wire L that passes behind the magnet ring CH _{A advances}, test resistance R ₁, test switch K ₁Get back to and pass the front zero line inlet wire L of magnet ring CH _{0 advances}, at this moment, pass the live wire A inlet wire L of magnet ring CH _{A advances}, live wire B inlet wire L _{B advances}With live wire C inlet wire L _{C advances}The electric current of middle inflow and the zero line inlet wire L that passes magnet ring CH _{0 advances}The electric current of middle outflow does not wait, thereby, detect winding L ₁On induce voltage, and be transported to drive circuit QD, the same with leak current fault in the above-mentioned load circuit, can cut off respectively at once live wire A input line L _AWith live wire A inlet wire L _{A advances}Connection, live wire B input line L _BWith live wire B inlet wire L _{B advances}Connection, live wire C input line L _CWith live wire C inlet wire L _{C advances}Connection.The adjusting test resistance R ₁The size of resistance can be set different sensitivity.Its Power resumption is with above-mentioned the same.

Three-phase and four-line large power electric control leakage switch of the present utility model both can be used for the protection control of the large electricity consumption subscriber line circuit of three-phase and four-line, also can be used for the protection control of relatively high power three-phase electric apparatus.

Claims (2)

1. a three-phase and four-line large power electric control leakage switch is by magnet ring CH, detects winding L ₁, drive circuit QD, carry out winding L ₂With the dynamic circuit breaker K switch ₂Consist of; It is characterized in that: also include the tripper that is consisted of by rectifier power source ZY, control relay, live wire A control relay, live wire B control relay, live wire C control relay and shutdown switch TK, starting switch QK;

In described control relay, be provided with one group of moving contact J ₁And J _{1`</sub>, two groups of fixed contact J <sub>2</sub>And J <sub>2`}J ₃And J _{3`</sub>And make contact J <sub>4</sub>, fixed contact J <sub>2</sub>Connect J <sub>3`}, J _2`Connect J ₃The zero line side of the coil J of control relay connects zero line input line L _o, its live wire end connects the output of shutdown switch TK, and the input of shutdown switch TK connects starting switch QK and make contact J ₄Output after the parallel connection, starting switch QK and make contact J ₄Input after the parallel connection connects the dynamic circuit breaker K switch ₂Output;

The live wire input of described rectifier power source ZY connects the output of shutdown switch TK, and its zero line input connects zero line input line L _oThe output of rectifier power source ZY connects respectively the moving contact J of control relay ₁And J _1`

The two ends of the coil JA of live wire A control relay connect respectively fixed contact J ₃And J _3`, be provided with a break contact J in the live wire A control relay _A, this moving contact J _ATwo ends respectively with live wire A input line L _AWith live wire A inlet wire L _{A advances}Origin or beginning connect;

The two ends of the coil JB of live wire B control relay connect respectively fixed contact J ₃And J _3`, be provided with a break contact J in the live wire B control relay _B, this moving contact J _BTwo ends respectively with live wire B input line L _BWith live wire B inlet wire L _{B advances}Origin or beginning connect;

The two ends of the coil JC of live wire C control relay connect respectively fixed contact J ₃And J _3`, be provided with a break contact J in the live wire C control relay _C, this moving contact J _CTwo ends respectively with live wire C input line L _CWith live wire C inlet wire L _{C advances}Origin or beginning connect;

Live wire A inlet wire L _{A advances}, live wire B inlet wire L _{B advances}, live wire C inlet wire L _{C advances}With zero line inlet wire L _{0 advances}Pass magnet ring CH; Detect winding L ₁Be wrapped in magnet ring CH, its two ends connect drive circuit QD; Carry out winding L ₂Two ends connect drive circuit QD, dynamic circuit breaker K switch ₂Device is being carried out winding L ₂Side; The dynamic circuit breaker K switch ₂Input connect live wire C input line L _C

2. three-phase and four-line large power electric control leakage switch according to claim 1, it is characterized in that: returning apparatus has by test switch K ₁With test resistance R ₁The hookup that is in series, the zero line inlet wire L before the magnet ring CH is passed in the end connection of this hookup _{0 advances}, the live wire A inlet wire L behind the magnet ring CH is passed in other end connection _{A advances}

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