CN201210473Y

CN201210473Y - Circuit breaker having secondary protection function

Info

Publication number: CN201210473Y
Application number: CNU2008200672634U
Authority: CN
Inventors: 万家盛; 汪志强
Original assignee: Hubei Shengjia Wiring Co Ltd
Current assignee: Hubei Shengjia Wiring Co Ltd
Priority date: 2008-05-20
Filing date: 2008-05-20
Publication date: 2009-03-18
Anticipated expiration: 2018-05-20

Abstract

The utility model is a breaker having the secondary protecting function, comprising a case body which is made from the insulating flame retardant material; a first breaking unit used for achieving the leading and breaking of the phase circuit under the normal state; the utility model also comprises a circuit substrate fixedly provided in the case body; a secondary protecting breaking unit locating at the same side of the case body of the secondary protecting breaking unit; the secondary protecting breaking unit comprises a detecting circuit located on the circuit substrate used for detecting whether the first breaking unit has the efficiency of the power breaking operation; a secondary breaking achieving mechanism connected to the detecting circuit; when the first breaking unit has no efficiency of the power breaking, the utility model automatically breaks the power.

Description

Circuit breaker with secondary protection function

Technical field

The utility model relates to a kind of circuit breaker, particularly a kind of in the time can't cutting off the power circuit connection status under the normal condition realizes disconnecting the circuit breaker that power line connects by second protection mechanism.

Background technology

Switch switchgear for power department, be the assurance Electrical Safety, carry out circuit switching imperative equipment, its internal structure of existing circuit breaker sees also shown in Figure 1, and it comprises: a box body 001, adopt the insulation fire proofing to make, portion is provided with following structure within it:

An one live wire incoming end 032 and a live wire output 037 are in order to be linked in the power line; One actuating mechanism, it comprises: one handle 021, it has an operating side and is arranged at outside the described box body 001, carries out the break-make control of circuit; One movable contact spring 024, its end have a moving contact 025; One interlock controll block group 022, it is made up of a plurality of STATEMENT OF FEDERALLY SPONSORED, rotate by the axle that is arranged in the described box body 001, an end of its STATEMENT OF FEDERALLY SPONSORED that goes up most 0221 is connected with described handle 021, and the end of bottom STATEMENT OF FEDERALLY SPONSORED 0222 is connected with the front end of described movable contact spring 023; One fixed contact 031, it is connected with described live wire input 032, when the described interlock controll block group 022 of turn handle 021 pulling, thereby causes seesawing of movable contact spring 024, the contact that realizes moving contact 025 and fixed contact 031 with separate, finally reach the purpose of power circuit break-make.It also comprises: an arc-extinguishing mechanism and an overcurrent protection mechanism; described arc-extinguishing mechanism is in order to eliminate the destruction of electric arc to circuit breaker; it comprises that a metal is when an arc plate 034 and an arc-extinguish chamber 035; described metal arc extinguishing board 033 is connected with described fixed contact 031 and extends to described box body 001 bottom, and described arc-extinguish chamber 035 is corresponding with described fixed contact 031.Described overcurrent protection mechanism is a magnetictrip 051; be arranged at described actuating mechanism bottom; the one end is connected with described movable contact spring upper end 023; its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED 052; the other end of described STATEMENT OF FEDERALLY SPONSORED 052 is connected with described interlock controll block group 022; when overcurrent appears in power line, make described dynamic and static contact separately, load and power line are disconnected.

But along with people to improving constantly that electric power safety and control require, existing circuit breaker is to be difficult to reach this requirement, still there is following defective in it by analysis:

At first, through long-term use, cause between the inside moving contact of circuit breaker and the fixed contact and produced glutinous company, even that is to say that circuit breaker is from be in off-state in form, but its inner in fact power line also is in connected state, and just there has been great potential safety hazard in this;

Secondly, when situation about having a power failure, actually the user can't judge power cut problem, or circuit breaker breaks down, if blindly repairing then brings hidden danger to safe handling;

Once more, if fault has taken place circuit breaker, the user can't obtain clear and definite indication, just can't in time fix a breakdown, and has caused difficulty so just for normal safety utilization of electric power;

At last, for Long-distance Control, how can cut off the supply of electric power of designated user by Long-distance Control, and it is carried out remote supervisory also is the feature that existing product does not possess, when (arrearage etc.) need circuit breaker to cut off the electricity supply for a certain reason, must the staff arrive the electricity consumption scene in person, could handle, like this poor efficiency.

In view of above-mentioned defective, the utility model creator has obtained this creation finally through long term studies and test.

Summary of the invention

The purpose of this utility model is, a kind of circuit breaker with secondary protection function is provided, in order to overcome above-mentioned defective.

For achieving the above object, the technical solution adopted in the utility model is, a kind of circuit breaker with secondary protection function is provided, and it comprises:

One box body, it adopts the insulation fire proofing to make;

One first breaking units is in order to realize the break-make of place phase alignment circuit under the normal condition; Wherein, also comprise:

One circuit substrate, it is fixedly installed on described box body inside;

One second protection breaking units, itself and described first breaking units are positioned at the homonymy of box body, and described second protection breaking units comprises:

Whether one circuit for detecting is positioned on the described circuit substrate, lost efficacy when described first breaking units carries out the power line open-circuit operation in order to detect;

The one secondary actuator that opens circuit, it is connected with described circuit for detecting, carries out the power line open-circuit operation when losing efficacy at described first breaking units, outage automatically;

Preferable, described first breaking units comprises:

One handle, it has an operating side and is arranged at outside the described box body, carries out the break-make control of power circuit;

One first movable contact spring, its end have one first moving contact;

One interlock controll block group, it is made up of a plurality of interlock controll blocks, connects by hinged two, and wherein an end of one first interlock controll block is connected with described handle, and a link end of controll block of an end is connected with the front end of described first movable contact spring;

One first fixed contact, it is connected with the described first phase line splicing ear;

Preferable, described first breaking units also comprises: a magnetictrip, be arranged at described actuating mechanism bottom, the one end is connected with described first movable contact spring, its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED, and one in the other end of described STATEMENT OF FEDERALLY SPONSORED and the described interlock controll block group supports STATEMENT OF FEDERALLY SPONSORED and be connected, when overcurrent appears in power line, make described sound contact separately, load and power line are disconnected;

Preferable, described circuit for detecting comprises:

One touch-switch, it is arranged at the bottom of described handle, and the one end is connected with a terminal on described first movable contact spring by a lead;

One electromagnet, it is arranged on the interior support of described box body, and the solenoid input of described electromagnet is connected with above-mentioned lead, and its output is connected with a zero terminal line; The handle of described first breaking units is when the off position turn, and described touch-switch closure if phase line does not disconnect, then has electric current to enter into described magnet spool, causes the action of described electromagnet;

Preferable, the described secondary actuator that opens circuit comprises:

The one secondary actuating mechanism that opens circuit, it comprises:

One rollover stand, described rollover stand rotates around a twisted axis, and the end that ejects of described iron core leans in described rollover stand one side, and it also has a faying surface;

One returning face plate, its twisted axis around the centre rotates, and an end of described returning face plate is overlapped on the described faying surface;

One current collector assembly, it is arranged in the interior support of described box body, and described current collector assembly comprises: a T shape frame is with spring on it, described T shape frame one end has a conduction moving contact, and the other end of described T shape frame leans the other end at described returning face plate;

One wire frame, its inside are provided with one second phase line splicing ear, and the described second phase line splicing ear is connected with phase line, and it extends the phase line of coming by two fixed contacts and described first breaking units and is connected;

Described conduction moving contact and two fixed contact normalities are closed;

Preferable, also comprising a malfunction indicating circuit, it is arranged on the described circuit substrate, and it comprises:

One indicator light is in order to indicate whether invalid state of the first breaking units break function;

Preferable, also comprising a power line condition indication circuit, it is arranged on the described circuit substrate, and it comprises:

One indicator light, it is connected on the described zero line and the first phase line splicing ear, in order to the indication power line whether voltage is arranged;

Preferable, also comprise: a power-switching circuit, it is arranged on the described circuit substrate, and it carries out transformation with power voltage line handles, for described malfunction indicating circuit and power line condition indication circuit provide electric power.

Of the present utility model compared with the prior art producing effect again is:

At first,,, also can cut off power line, increase fail safe by described second protection breaking units even between the inside of circuit breaker moving contact and fixed contact, produced glutinous company owing to increased the second protection breaking units;

Secondly, increased the power line indicator light, when the electricity consumer unregulated power was supplied, can determine clearly to have a power failure still was because aimless maintenance has been avoided in the unregulated power supply that the circuit breaker self reason causes;

Once more, increase the circuit breaker malfunction indicator lamp, when the circuit breaker cut-out function breaks down, can indicate timely, reduced potential safety hazard;

At last, be provided with Long-distance Control, make power department realize long-range confession, outage, reduced the manpower consumption, reduced management of power use cost the electricity consumption of electricity consumer.

Description of drawings

Fig. 1 is the internal structure schematic diagram of the circuit breaker of prior art;

Fig. 2 is the schematic diagram that the utlity model has circuit breaker embodiment one internal structure of secondary protection function;

Fig. 3 is the schematic diagram that the utlity model has circuit breaker embodiment two internal structures of secondary protection function;

Fig. 4 is the circuit diagram one with circuit breaker embodiment three of secondary protection function for the utility model;

Fig. 5 is the circuit diagram two with circuit breaker embodiment three of secondary protection function for the utility model.

Embodiment

Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the utility model is above-mentioned.

See also shown in Figure 2; it is the schematic diagram that the utlity model has circuit breaker embodiment one internal structure of secondary protection function; it is (to have only an actuating mechanism at monolithic; be responsible for the break-make of a phase line) describe; for three-phase, it just is used in combination and can realizes, it comprises: a box body 001; adopt the insulation fire proofing to make, portion is provided with following structure within it:

First breaking units, in order to realize the break-make of place phase alignment circuit under the normal condition, described first breaking units comprises: an actuating mechanism, realize the make-break operation of user to power line; One arc-extinguishing mechanism is in order to eliminate the destruction of electric arc to circuit breaker; One overcurrent protection mechanism is in order to prevent the excessive circuit breaker that burns of operating current; One first phase line splicing ear 032, it is in order to connect phase line 042;

Described actuating mechanism comprises: one handle 021, and it has an operating side and is arranged at outside the described box body 001, and the break-make of carrying out power circuit by rotation is switched; One first movable contact spring 024, its end have one first moving contact 025; One interlock controll block group 022, it is made up of a plurality of STATEMENT OF FEDERALLY SPONSORED, rotate by the axle that is arranged in the described box body 001, an end of the STATEMENT OF FEDERALLY SPONSORED that it is gone up most is connected with described handle, and the end of bottom STATEMENT OF FEDERALLY SPONSORED is connected with the front end of described first movable contact spring 024; One first fixed contact 031, it is connected with the described first phase line splicing ear 032; When the turn handle spurs the action of described interlock controll block group, thereby cause seesawing of first movable contact spring 024, realize that first moving contact 025 with 031 contact of first fixed contact with separate, finally reaches the purpose of load and power circuit break-make;

Need to prove in order to increase the reliability of circuit breaker, make the user can obviously see the on-off action of first moving contact 025, first fixed contact 031 clearly, described box body 001 top and corresponding position, described first fixed contact, 031 position are to be made by the transparent insulation fire proofing, and all be provided with fluoresent coating at described first moving contact 025 and first fixed contact 031, so that electricity consumer is observed the contact situation of dynamic and static contact.

Described overcurrent protection mechanism is a magnetictrip 051, be arranged at described actuating mechanism bottom, the one end is connected with described first movable contact spring 024, its other end leans the end in a STATEMENT OF FEDERALLY SPONSORED 052, the other end of described STATEMENT OF FEDERALLY SPONSORED 052 overlaps mutually with a wherein support STATEMENT OF FEDERALLY SPONSORED 0224 of described interlock controll block group 022, when overcurrent appears in power line, described magnetictrip 051 front end is moving to pulling back with described first movable contact spring 024, the described STATEMENT OF FEDERALLY SPONSORED 052 of described magnetictrip 051 front end pushing tow is around a rotation, causing supporting in the described interlock controll block group STATEMENT OF FEDERALLY SPONSORED 024 separates with described STATEMENT OF FEDERALLY SPONSORED, cause circuit breaker with described first moving contact 025, first fixed contact 031 separates, and load and power line disconnect;

Described arc-extinguishing mechanism is in order to eliminate the destruction of electric arc to circuit breaker, it comprises a metallic plate 033 and an arc-extinguish chamber 035, described metallic plate 033 is connected with described first fixed contact 031 and extends to described box body 001 bottom, and described arc-extinguish chamber 035 is corresponding with described first fixed contact 031;

One circuit substrate 036, it is fixedly installed on described box body 001 inside, as the carrier that each circuit is set;

One second protection breaking units, itself and described first breaking units are positioned at the homonymy of box body 001, when described first breaking units is cutting off phase alignment circuit when failure of removal occurring, the described second protection breaking units that is positioned at described box body 001 homonymy make load automatically with the power circuit disconnection; Described second protection breaking units comprises: a circuit for detecting and the secondary actuator that opens circuit, wherein,

Whether described circuit for detecting is arranged on the described circuit substrate 036, lost efficacy when described first breaking units carries out the power line open-circuit operation in order to detect; It comprises:

One touch-switch 072, it is arranged at the bottom of described handle 021, and the one end is by the lead (not shown) that is connected with described first movable contact spring;

One electromagnet 066, it is arranged on the interior support 011 of described box body, and the solenoid input of described electromagnet is connected with above-mentioned lead, and its output is connected with a zero terminal line; When the handle 021 of first breaking units during to the off position turn, described touch-switch 072 closure, if phase line is not disconnected, then there is electric current to enter into the coil of described electromagnet 066 by described first movable contact spring 024, cause the action of described electromagnet 066;

The described secondary actuator that opens circuit detects described first breaking units at described circuit for detecting and carries out the power line open-circuit operation when losing efficacy, load automatically with the power line disconnection; It comprises:

One rollover stand 065, described rollover stand 065 rotates around a twisted axis, and the end that ejects of described iron core leans in described rollover stand 065 one side, and described rollover stand 065 also has a faying surface;

One returning face plate 064, its twisted axis around the centre rotates, and an end of described returning face plate 064 is overlapped on the described faying surface;

One current collector assembly, be arranged in the support 062 in the described box body, described current collector assembly has a T shape frame 061, be with spring 063 on it, described T shape frame 061 1 ends have a conduction moving contact, the other end of described T shape frame 061 leans the other end at described returning face plate 064, and normality spring 063 is a compressive state;

One wire frame, its inside are one second phase line splicing ear 037, and the described second phase line splicing ear 037 is connected with phase line 043, and it extends the phase line of coming by two fixed contacts and described first breaking units and is connected;

Described conducting moving contact and two fixed contact normalities are closed; The power down process of carrying out that detects first breaking units of circuit when described circuit for detecting does not have success (described first moving contact 025 does not separate with first fixed contact 031); the coil of the electromagnet 066 of described circuit for detecting has electric current to flow through; thereby cause action unshakable in one's determination; described rollover stand 065 is subjected to roof pressure unshakable in one's determination; described then rollover stand 065 sways; cause an end of described returning face plate 064 to separate with the faying surface of described rollover stand 065; T shape frame 061 moves under the effect of spring 063 in the described current collector assembly thereby make; thereby described conducting contact is separated with two fixed contacts; realize that phase line 042 and phase line 043 disconnect; the disconnection action of this second protection is enforceable, can not recover.

For the ease of when the described first breaking units disconnection process lost efficacy, make the user can clearly know failure condition, also set up a malfunction indicating circuit and be arranged on (please in conjunction with Fig. 4 or circuit diagram shown in Figure 5) on the described circuit substrate 036, it comprises:

One first indicator light 071 (LED2) is in order to indicate whether invalid state of the first breaking units break function;

For indication user power supply stop since the fault of circuit breaker own he causes or have a power failure and cause, set up a power line condition indication circuit, it comprises one second indicator light 032 (LED1), it is connected on described zero line and the first phase line splicing ear 042 (phase line incoming end), if certainly with the indicator light as neon bulb then can directly install, if bulb just has requirement to voltage without transformation; Then also need set up a power-switching circuit, it carries out transformation with power voltage line and handles, for described malfunction indicating circuit and power line condition indication circuit provide electric power, this is fairly simple circuit for a person skilled in the art, has just repeated no more here.

See also shown in Figure 3, it is the schematic diagram that the utlity model has circuit breaker embodiment two internal structures of secondary protection function, the difference of itself and the foregoing description is, except having secondary protection function, present embodiment has also had Long-distance Control circuit breaker break function, promptly make circuit breaker produce the action of opening circuit, thereby realize the action that load and power circuit disconnect by remote signal; Only having cancelled break signal at remote control center could be provided with a remote circuit breaker control unit (please in conjunction with circuit diagram shown in Figure 4) normally with breaker closing for this reason in described box body, it comprises:

One actuator that opens circuit, in order to realize cutting off the action of power circuit, it comprises: it is arranged at first electromagnet 080 in the described box body 001 on the support, be positioned at the below of described magnetictrip 051, its inside is provided with iron core, and an end of described iron core and described STATEMENT OF FEDERALLY SPONSORED 052 lower end lean;

One carries out control circuit, and it is connected with the described actuator that opens circuit, and controls the action of the described actuator that opens circuit; It comprises: a power circuit, and it is connected with the described actuator that opens circuit, for it provides electric power;

One power control circuit, the break-make of control power circuit, thus the action of controlling the described actuator that opens circuit is carried out; Wherein, described power circuit is a rectification circuit D1-D4, its output is connected with the input of the solenoid of described first electromagnet 080 (TQ2), the solenoid output of described first electromagnet 080 (TQ2) is connected with described zero terminal, and described rectification circuit D1-D4 input is connected with described phase line;

Described power control circuit comprises: one first photoelectrical coupler IC2, and in order to transmission of control signals, the one output is connected with the positive pole of described rectification circuit D1-D4; One thyristor SCR, its control end is connected with described first another output of photoelectrical coupler IC2, and the other two ends of described thyristor SCR are connected with the positive and negative electrode of described rectification circuit D1-D4, in order to control the break-make of described execution control circuit;

Its course of work is: control signal is continuously applied on the signal input part of the described first photoelectrical coupler IC2, produce high potential at the described first photoelectrical coupler IC2 output, thereby make described thyristor SCR conducting, thereby make the solenoid of described first electromagnet 080 (TQ2) have electric current to flow through, make its inner core action then, the described STATEMENT OF FEDERALLY SPONSORED 052 of pushing tow, make it around a rotation, causing supporting in the described interlock controll block group 022 STATEMENT OF FEDERALLY SPONSORED 0224 separates with described STATEMENT OF FEDERALLY SPONSORED 052, cause circuit breaker that described first moving contact 025 and first fixed contact 031 are separated, power line disconnects; Because the existence of back-moving spring 026 can be replied this off state, but prerequisite is the signal input part no signal input of the described first photoelectrical coupler IC2, can make its closure.

For fructufy effectively monitoring now to Long-distance Control, the utility model also provides a feedback circuit, the break-make information of power line is passed to remote control center, described feedback circuit comprises: one second photoelectrical coupler IC3, the one end is connected with the positive pole of described rectification circuit D1-D4, and its other end ground connection is when power line is not disconnected when still having voltage, export a signal at the output of the described second photoelectrical coupler IC3, to respective remote control control centre.

In order to adapt, a remote control signal receiving circuit also should be arranged, in order to receive outside wireless control signal with above-mentioned Long-distance Control; One decoding circuit, it is connected with described remote control signal receiving circuit, obtains corresponding digital controlled signal; One decoding circuit is resolved described digital controlled signal and be converted to voltage signal and exports to described power control circuit.

See also shown in Figure 4, it is the circuit diagram one with circuit breaker embodiment three of secondary protection function for the utility model, it is compared with the above embodiments, increased Overvoltage protecting unit again, when the situation of overvoltage in power line, occurring, the output control signal disconnects load and power line;

It comprises: a voltage signal sampling circuit, and its positive pole with described rectification circuit D1-D4 is connected, and in order to obtain the magnitude of voltage of power line, it comprises resistance R 5, the R6 of two series connection, and described voltage sampling point is the centre of two resistance R 5, R6;

One overvoltage decision circuitry, it comprises a comparator IC1, described voltage signal sampling circuit output end is connected with the in-phase input end of described comparator IC1, the inverting input of described comparator IC1 is provided with a reference voltage, described reference voltage is to be obtained by the positive pole of voltage stabilizing circuit from described rectification circuit D1-D4, described voltage stabilizing circuit comprises: a voltage stabilizing didoe WD and the capacitor C 1 in parallel with it are formed, it provides stable operating voltage for described comparator IC1, the output of described comparator IC1 is connected with the control end of described thyristor SCR, in order to prevent the destruction of reverse current to described comparator IC1, between has increased by a diode D6, as described comparator IC1 because in-phase input end voltage when excessive, it exports a high potential signal, thereby make described thyristor SCR conducting, make the solenoid of the described first electromagnet TQ2 (080) have electric current to flow through to the greatest extent, thereby make the described first electromagnet TQ2 (080) action, the described STATEMENT OF FEDERALLY SPONSORED 052 of pushing tow, it is swayed, causing supporting in the described interlock controll block group 022 STATEMENT OF FEDERALLY SPONSORED 0224 separates with described STATEMENT OF FEDERALLY SPONSORED 052, cause circuit breaker that described first moving contact 025 and first fixed contact 031 are separated, finishing load and power line disconnects, because the existence of back-moving spring 026, this off state can be replied, but prerequisite is not have overpressure problems in the power line, can make it recover closed.

Certainly depend on the ability to bear of power consumption equipment for the protection of overvoltage phenomenon to too high voltages, in order to allow the user can set the overvoltage boundary, and then the actual needs of adaptation electricity consumption situation, present embodiment also comprises overvoltage adjustment circuit, in order to adjust the voltage max that allows; It is a slide rheostat W1 that described overpressure value is adjusted circuit, is arranged between the in-phase input end and ground of described comparator IC1; Can certainly be (not shown) between the inverting input of a slide rheostat setting and described comparator IC1 and the ground, adjust the positive that enters described comparator IC1, the magnitude of voltage of inverting input by adjusting resistance value, adjust the situation of described comparator IC1 output high potential, finally adjust overpressure value;

Certainly in order to satisfy following needs to remote control control, the overvoltage decision circuitry mode (not shown) that other also can be arranged, below for an embodiment, it comprises: an A/D converter and a processor, the positive pole of described rectification circuit D1-D4 is connected with described A/D converter input, the output of described A/D converter is connected with the input of described processor, described processor internal preset one threshold value, the overvoltage phenomenon appears in power line, described processor is controlled the conducting of described thyristor SCR, finish the processing action that load is automatic and power line disconnects, certainly need not overvoltage and adjust circuit, just can realize this adjustment by the threshold voltage that is provided with in the described processor.

See also shown in Figure 5; it is the circuit diagram two with circuit breaker embodiment three of secondary protection function for the utility model; the difference of itself and circuit diagram one is; the circuit setting of the power control circuit of remote circuit breaker control unit and feedback circuit; so the purpose that is provided with is to prevent circuit device described in the utility model in use; the signal input end with the outside by user's malice is damaged; cause long-range can't be to the circuit breaker control of opening circuit; the power control circuit of described remote circuit breaker control unit, it comprises:

One first photoelectrical coupler 1IC2, in order to transmission of control signals, the one output is connected with an electric capacity 1C2; One thyristor 1SCR, its control end is connected with described first another output of photoelectrical coupler 1IC2, in order to prevent the destruction of reverse current to the described first photoelectrical coupler 1IC2, also increased by a diode 1D5, the other two ends of described thyristor 1SCR are connected with the positive and negative electrode of described rectification circuit 1D1-1D4, in order to control the break-make of described execution control circuit;

Its course of work is: when control signal continues to be arranged at the signal input part of the described first photoelectrical coupler 1IC2, because the existence of described electric capacity 1C2, its output 4 is always electronegative potential, then do not produce the long-range control of opening circuit this moment, when described control end C is not having the signal input, then output 4 is a high potential, then make described thyristor 1SCR conducting, thereby make the solenoid of the described first electromagnet 1TQ2 (080) have electric current to flow through, thereby make its inner core action, the described STATEMENT OF FEDERALLY SPONSORED 052 of pushing tow, it is swayed, cause supporting in the described interlock controll block group 022 STATEMENT OF FEDERALLY SPONSORED 0224 and separate, cause circuit breaker described moving with described STATEMENT OF FEDERALLY SPONSORED 052, fixed contact is separately finished power line and is disconnected, because the existence of back-moving spring 026, this off state can be replied, continue that lasting signal input is arranged, can make its closure but prerequisite is the signal input part of the described first photoelectrical coupler 1IC2.If when someone destroys the input of control far away, the voltage that the signal input part of the first photoelectrical coupler 1IC2 does not just have to continue is yet imported, and then natural circuit breaker action disconnection is connected with power line;

Corresponding feedback circuit is provided with 4 pin of a resistance 1R7 at the described first photoelectrical coupler 1IC2 on the basis of circuit diagram one, itself and described electric capacity 1C2 are in series and produce the effect of time-delay, avoid under normal circumstances, produce the circuit breaker action that makes a mistake before remote control signal does not arrive.

The utlity model has the circuit breaker of secondary protection function, its advantage is,

At first,,, also can make the automatic and power line disconnection of load, increase fail safe by described second protection breaking units even between the inside of circuit breaker moving contact and fixed contact, produced glutinous company owing to increased the second protection breaking units;

At last, be provided with Long-distance Control, being power department realizes long-range confession, outage to the electricity consumption of electricity consumer, has reduced the manpower consumption, has reduced management of power use cost.

The above only is preferred embodiment of the present utility model, only is illustrative for the utility model, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes to it in the spirit and scope that the utility model claim is limited, revise, even equivalence, but all will fall in the protection range of the present utility model.

Claims

1, a kind of circuit breaker with secondary protection function, it comprises:

One box body, it adopts the insulation fire proofing to make;

One first breaking units is in order to realize the break-make of place phase alignment circuit under the normal condition; It is characterized in that, also comprise:

One circuit substrate, it is fixedly installed on described box body inside;

The one secondary actuator that opens circuit, it is connected with described circuit for detecting, carries out the power line open-circuit operation when losing efficacy at described first breaking units, outage automatically.

2, the circuit breaker with secondary protection function according to claim 1 is characterized in that, described first breaking units comprises:

One first movable contact spring, its end have one first moving contact;

One first fixed contact, it is connected with the described first phase line splicing ear.

3, the circuit breaker with secondary protection function according to claim 2; it is characterized in that; described first breaking units also comprises: a magnetictrip; be arranged at described actuating mechanism bottom; the one end is connected with described first movable contact spring; its other end is connected with an end of a STATEMENT OF FEDERALLY SPONSORED; in the other end of described STATEMENT OF FEDERALLY SPONSORED and the described interlock controll block group one supports STATEMENT OF FEDERALLY SPONSORED and is connected; when overcurrent appears in power line; make described sound contact separately, load and power line are disconnected.

4, the circuit breaker with second protection energy according to claim 3 is characterized in that described circuit for detecting comprises:

One electromagnet, it is arranged on the interior support of described box body, and the solenoid input of described electromagnet is connected with above-mentioned lead, and its output is connected with a zero terminal line; The handle of described first breaking units is when the off position turn, and described touch-switch closure if phase line does not disconnect, then has electric current to enter into described magnet spool, causes the action of described electromagnet.

5, the circuit breaker with secondary protection function according to claim 4 is characterized in that, the described secondary actuator that opens circuit comprises:

The one secondary actuating mechanism that opens circuit, it comprises:

Described conduction moving contact and two fixed contact normalities are closed.

6, the circuit breaker with secondary protection function according to claim 3 is characterized in that, also comprises a malfunction indicating circuit, and it is arranged on the described circuit substrate, and it comprises:

One indicator light is in order to indicate whether invalid state of the first breaking units break function.

7, the circuit breaker with secondary protection function according to claim 4 is characterized in that, also comprises a power line condition indication circuit, and it is arranged on the described circuit substrate, and it comprises:

One indicator light, it is connected on the described zero line and the first phase line splicing ear, in order to the indication power line whether voltage is arranged.

8, according to claim 6 or 7 described circuit breakers with secondary protection function; it is characterized in that; also comprise: a power-switching circuit; it is arranged on the described circuit substrate; it carries out transformation with power voltage line handles, for described malfunction indicating circuit and power line condition indication circuit provide electric power.