Residual current circuit breaker
Technical field
The utility model relates to a kind of circuit breaker, is specifically related to a kind of residual current circuit breaker.
Background technology
Residual current circuit breaker forms primarily of zero sequence current mutual inductor, Electronic Control leakage tripping device and the circuit breaker with overload and short-circuit protection.When electric leakage in protected circuit or the person get an electric shock; as long as leakage current reaches design alternative operating current value; the secondary winding of zero sequence current mutual inductor just exports a signal, and makes breaker actuation by leakage tripping device, thus cuts off the electricity supply and play electric leakage and electrical shock protection effect.
In order to whether the creepage protection function detecting residual current circuit breaker normally works; current residual current circuit breaker is all provided with experimental rig usually; the creepage protection function of inspection residual current circuit breaker that can be regular; experimental rig generally includes the test loop be made up of the test button of connecting and test resistance; press test button conduction test loop and can trigger electric leakage signal; if residual current circuit breaker is automatically threaded off and cut off the electricity supply, illustrating that creepage protection function is normal, then illustrating that creepage protection function is not normal as automatically do not threaded off.
Because traditional experiment device is series between power supply and trip gear, once the words trip gear of long-time pressing test button will perform trip action always, cause the electronic component of trip gear to burn out, thus damage whole residual current circuit breaker.
Utility model content
For the deficiency that prior art exists, under the purpose of this utility model is to provide a kind of circuit breaker to be in trip status, experimental rig cannot.
For achieving the above object, the utility model provides following technical scheme: comprise insulation crust, the linkage being controlled breaker closing or dropout in insulation shell by handle drives is set, control the trip gear that linkage is threaded off, experimental rig, this experimental rig comprises the test resistance be electrically connected with trip gear, can the test button of opposing insulation shell slippage, the reset assembly of reset test button, it is characterized in that: described experimental rig also comprises the second electrical connector and the first electrical connector, this first electrical connector to be installed in insulation crust and to be provided with first link relative with the second electrical connector and second link relative with linkage, described linkage comprises and to be electrically connected with moving contact and with the 3rd electrical connector of linkage synchronous shift, the 3rd described electrical connector contacts to form with the second link of the first electrical connector when handle drives linkage makes breaker closing and is electrically connected, the second link when handle drives linkage makes circuit breaker tripping away from the first electrical connector removes electrical connection, the second described electrical connector is installed on test button and will contacts the electrical connection of formation first electrical connector and test resistance with the first electrical connector and test resistance respectively when test button is pressed.
By adopting technique scheme, be the second electrical connector, the first electrical connector and the 3rd connector by electrical connector split originally, second electrical connector is for connecting the first electrical connector and test resistance, and the first electrical connector is for connecting the second electrical connector and the 3rd electrical connector, when circuit breaker is trip status, the structure cut off in multistage, guarantee can not cause because electrical connector is single and contacts by mistake and make trip gear continuous firing; Secondly, when circuit breaker is closure state and experimental rig works, the test resistance of experimental rig is once drive trip gear successfully to thread off once, the 3rd electrical connector be installed on linkage will be synchronized with the movement away from the first electrical connector with linkage, the circuit of experimental rig is made to be off-state, namely experimental rig quits work, namely the electronic component avoiding trip gear burns out, thus damages whole residual current circuit breaker, extends the useful life of residual current circuit breaker.
The utility model is set to further: the first described electrical connector is torsion spring, the first described link and the second link are respectively the two ends of torsion spring, the first described link resets towards the second electrical connector, and the second described link resets towards the 3rd electrical connector.
By adopting technique scheme, first electrical connector is torsion spring, its two ends can reset respectively to the second electrical connector and the 3rd electrical connector, fully fitted when experimental rig works the second electrical connector and the 3rd electrical connector in its end, experimental rig is powered and drives trip gear more stable.
The utility model is set to further: be provided with for the sheathed erection column in the first electrical connector center in described insulation crust and carry out spacing limiting plate with the first link and the second link to pairing first link and the second link respectively.
By adopting technique scheme, first link and the second link carry out spacingly coordinating the first link and the automatically reset function of the second link by limiting plate, while limiting the first link and the second link reset scope, torsion spring position is limited, avoid torsion spring to rotate on a large scale causing the first link and the second link not corresponding with the position of the second electrical connector and the 3rd electrical connector, cause the disabler of experimental rig or contact the danger that lock strap comes by mistake.
The utility model is set to further: one end that the second described electrical connector contacts with test resistance is that circular arc is arranged.
By adopting technique scheme, arc-shaped being arranged in end, providing certain pressing force to test resistance to while increasing contact area when the second electrical connector contacts with test resistance the second electrical connector, ensure electrical connection stability.
The utility model is set to further: described reset assembly comprises back-moving spring and is fixedly installed on for installing the spring base of back-moving spring in insulation crust, and this back-moving spring arranges along test button glide direction and is installed with between test button and spring base.
By adopting technique scheme, independent return unit is adopted to reset, instead of reset while being electrically connected by other electrical connectors, even if ensure to occur that deformation also can not affect electrical connection properties after repeated, greatly improve the stability of experimental rig.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is the partial perspective view one of the utility model embodiment;
Fig. 2 is the enlarged drawing of A in Fig. 1;
Fig. 3 is the partial perspective view two of the utility model embodiment.
Embodiment
As shown in Figures 1 to 3, the utility model discloses a kind of residual current circuit breaker, comprise insulation crust 1, the linkage 2 being controlled breaker closing or dropout in insulation shell 1 by handle drives is set, control the trip gear 3 that linkage 2 is threaded off, experimental rig 4, trip gear is release, this experimental rig 4 comprises the test resistance 41 be electrically connected with trip gear 3, can the test button 42 of opposing insulation shell 1 slippage, the reset assembly 43 of reset test button 42, test resistance 41 also can be replaced by the circuit board of band experiment resistance 41, experimental rig 4 also comprises the second electrical connector 45 and the first electrical connector 44, this first electrical connector 44 to be installed in insulation crust 1 and to be provided with first link 441 relative with the second electrical connector 45 and second link 442 relative with linkage 2, linkage 2 comprises and to be electrically connected with moving contact and with the 3rd electrical connector 22 of linkage 2 synchronous shift, and this linkage is the quadric chain of co-acting lever in circuit breaker and moving contact, this quadric chain comprises the moving contact installing rack 22 installing moving contact, in the utility model embodiment, because moving contact installing rack 22 distance test (DT) button 41 is nearer, therefore this moving contact installing rack is made of metal, namely installing rack torsion spring for resetting on it realizes moving contact and the series connection of the first electrical connector, the installing rack torsion spring of Appropriate application existing structure, also can be other electrical connectors being fixed on moving contact installing rack, certainly, 3rd connector can be installed on other bars in quadric chain and be connected by other end of incoming cables of wire and circuit breaker, 3rd electrical connector 21 contacts to form with the second link 442 of the first electrical connector 44 when handle drives linkage 2 makes breaker closing and is electrically connected, the second link 442 when handle drives linkage 2 makes circuit breaker tripping away from the first electrical connector 44 removes electrical connection, second electrical connector 45 is installed on test button 4 and will contacts the electrical connection of formation first electrical connector 44 with test resistance 41 with the first electrical connector 44 and test resistance 41 respectively when test button 42 is pressed, test resistance 41 can be arranged at any position in insulation crust 1 and be connected with the second electrical connector 45 by other electric-conductors, be the second electrical connector 45 by electrical connector split originally, first electrical connector 44 and the 3rd connector 21, second electrical connector 45 is for connecting the first electrical connector 44 and test resistance 41, and the first electrical connector 44 is for connecting the second electrical connector 45 and the 3rd electrical connector 21, when circuit breaker is trip status, the structure cut off in multistage, guarantee can not cause because electrical connector is single and contacts by mistake and make trip gear continuous firing, secondly, when circuit breaker is closure state and experimental rig 4 works, the test resistance 41 of experimental rig 4 is once drive trip gear 3 successfully to thread off once, the 3rd electrical connector 21 be installed on linkage 2 will be synchronized with the movement away from the first electrical connector 44 with linkage, the circuit of experimental rig 4 is made to be off-state, namely experimental rig 4 quits work, namely the electronic component avoiding trip gear 3 burns out, thus damages whole residual current circuit breaker, extends the useful life of residual current circuit breaker.
First electrical connector 44 is torsion spring, first link 441 and the second link 442 are respectively the two ends of torsion spring, first link 441 resets towards the second electrical connector 45, second link 442 resets towards the 3rd electrical connector 21, first electrical connector 44 is torsion spring, its two ends can reset respectively to the second electrical connector 45 and the 3rd electrical connector 21, fully fitted when experimental rig works the second electrical connector 45 and the 3rd electrical connector 21 in its end, experimental rig 4 is powered and drives trip gear 3 more stable.
Be provided with for the sheathed erection column 11 in the first electrical connector 44 center in insulation crust 1 and carry out spacing limiting plate 12 with the first link 441 and the second link 442 to pairing first link 441 and the second link 442 respectively, first link 441 and the second link 442 carry out spacingly coordinating the first link 441 and the automatically reset function of the second link 442 by limiting plate 12, limit the first link 441 and the second link 442 to reset while scope and limit torsion spring position, avoid torsion spring to rotate on a large scale causing the first link 441 and the second link 442 not corresponding with the position of the second electrical connector 45 and the 3rd electrical connector 21, cause the disabler of experimental rig 4 or contact the next danger of lock strap by mistake.
One end 441 that second electrical connector 45 contacts with test resistance 41 is arranged in circular arc, arc-shaped is arranged in end, there is provided certain pressing force to test resistance 41 to while increasing contact area when the second electrical connector 45 contacts with test resistance 41 second electrical connector 45, ensure electrical connection stability.
Reset assembly 43 comprises back-moving spring 431 and is fixedly installed in insulation crust 1 for installing the spring base 13 of back-moving spring 431, this back-moving spring 431 arranges along test button 42 glide direction and is installed with between test button 42 and spring base 13, independent return unit is adopted to reset, instead of reset while being electrically connected by other electrical connectors, even if ensure to occur that deformation also can not affect electrical connection properties after repeated, greatly improve the stability of experimental rig 4.