CN208272609U - A kind of residual current action breaker - Google Patents

Abstract

The utility model discloses a kind of residual current action breakers, including breaker unit and residual current trip；The residual current trip is using protected major loop as power supply, it includes residual current transformer, residual current control unit, residual current trip unit, the residual current trip further includes residual current protecting unit associated with the division state of breaker unit, when breaker unit is in "on" position, the residual current protecting unit enables the current supply circuit between residual current trip and major loop be connected, when breaker unit is in gate-dividing state, the residual current protecting unit enables the current supply circuit between residual current trip and major loop disconnect.The line of pouring into that residual current action breaker may be implemented in the utility model is powered, and the control circuit board of residual current trip can be protected not damage because being electrified for a long time, to ensure that the long-term safety work of residual current action breaker.

Description

A kind of residual current action breaker

Technical field

The utility model relates to a kind of residual current action breakers.

Background technique

In a power distribution system, residual current action breaker is mainly used for providing direct or indirect contact protection to human body, Or fire hazard may cause to the long-standing ground fault that overcurrent protection cannot detect, protection is provided.Residual current Action breaker includes breaker unit and residual current trip, and residual current trip is connected to the outgoing line side of breaker, In failure electric current, residual current action breaker can be acted, to disconnect the power input of residual current trip.Mesh Preceding common residual current action breaker in the market clearly requires end of incoming cables and leading-out terminal, i.e., residual current acting is disconnected The end of incoming cables of road device and power supply, which are surveyed, to be connected, and the leading-out terminal of residual current action breaker is connect with load-side, power supply and load end Wiring cannot be reversed, once reversed will make residual current trip be chronically at power supply state, i.e., after breaker disconnection but not The power supply that residual current trip can be disconnected, thus will cause and occurs high current in route, so that residual current be made to thread off Device scaling loss makes entire residual current action breaker fail.Residual current action breaker use is also limited thus pours line into Function.

Utility model content

The technical problem to be solved by the utility model is to overcome the shortage of prior art, a kind of security reliability is provided more High, the wider array of residual current action breaker of the scope of application.

The utility model specifically uses following technical scheme to solve above-mentioned technical problem:

A kind of residual current action breaker, including breaker unit and residual current trip；The residual current is de- Device is detained using protected major loop as power supply comprising residual current transformer, residual current control unit, residual current tripping Unit, the residual current trip further include residual current protecting unit associated with the division state of breaker unit, When breaker unit is in "on" position, the residual current protecting unit enables the confession between residual current trip and major loop Electrical circuit conducting, when breaker unit is in gate-dividing state, the residual current protecting unit enables residual current trip and master Current supply circuit between circuit disconnects.

Preferably, the residual current protecting unit includes one group and is serially connected between residual current trip and major loop Mechanical switch in current supply circuit and the mechanical switch and breaker unit is enabled to realize the mechanical couplings mechanism of mechanical couplings, When breaker unit is in "on" position, the mechanical couplings mechanism drives the mechanical switch conducting, at breaker unit In gate-dividing state, the mechanical couplings mechanism drives the mechanical switch to disconnect.

Preferably, the mechanical switch is microswitch or relay.

Preferably, the residual current protecting unit further includes for providing the attached of the division state instruction of breaker unit Add mechanical switch, the additional mechanical switch and breaker unit mechanical couplings, the switch state of additional mechanical switch and open circuit The division state of device unit respectively corresponds.

Further, the residual current protecting unit further includes the shell for accommodating the mechanical switch.

Compared with prior art, technical solutions of the utility model have the advantages that

Due to the residual current protecting unit using the utility model, residual current action breaker is in residual current failure The power supply connection that residual current trip has been cut off after disconnection, protects the control circuit board of residual current trip will not be because of length Phase is powered and damages, to ensure that the long-term safety work of residual current action breaker.And due to increasing residual current Protection location, even if residual current action breaker can also realize protection in the case where pouring line power supply into.

Detailed description of the invention

Fig. 1 is the principles of the present invention block diagram；

Fig. 2, Fig. 3 are a kind of layout structure schematic diagram of the utility model；

Fig. 4 is the concrete structure schematic diagram of auxiliary switchgear；

Fig. 5 is one embodiment circuit diagram of the utility model；

Fig. 6 is another embodiment circuit diagram of the utility model.

Include that the following drawings marks in figure:

1, shell, 11, pedestal, 12, lid, 2, push rod, 3, microswitch, 31, contact, 4, breaker unit, 5, remaining electricity Flow buckle releaser, 6, auxiliary switchgear, 7, conducting wire, 8, shaft.

Specific embodiment

In view of the shortcomings of the prior art, as shown in Figure 1, the resolving ideas of the utility model is in main circuit power and residue electricity Residual current protecting unit associated with the division state of breaker unit is set between flow control unit, works as breaker unit In "on" position, the residual current protecting unit enables the current supply circuit between residual current trip and major loop be connected, When breaker unit is in gate-dividing state, the residual current protecting unit enables the confession between residual current trip and major loop Electrical circuit disconnects.

Using the above scheme, when occurring residual current failure in major loop, the residual circuit electric current that is through in major loop Residual current control unit is sent into after the transformer induced signal that is out of order, it is single that residual current control unit controls residual current tripping Member drives breaker unit movement, the connection of disjunction load and major loop.When breaker unit movement, while driving remaining electricity The switch state switching of protection location is flowed, so that the power supply for disconnecting residual current control unit and breaker unit connects.

The residual current protecting unit can be realized using electronic switch or mechanical switch, it is contemplated that mechanical switch has can By property and cost advantage, it is preferable that the residual current protecting unit includes one group and is serially connected with residual current trip and leads back Mechanical switch (such as microswitch, relay etc.) in current supply circuit between road and enable the mechanical switch and breaker Unit realizes the mechanical couplings mechanism of mechanical couplings, when breaker unit is in "on" position, the mechanical couplings mechanism driving The mechanical switch conducting, when breaker unit is in gate-dividing state, the mechanical couplings mechanism drives the mechanical switch disconnected It opens.

Fig. 2~Fig. 5 is one specific embodiment of the utility model, wherein Fig. 2, Fig. 3 show its layout structure.Such as Fig. 2 Shown, the residual current protecting unit of the present embodiment is made of auxiliary switchgear 6, and the auxiliary switchgear 6 is placed on disconnected The N phase position of road device unit, is connected between power supply and residual current control unit by conducting wire 7.As shown in figure 4, auxiliary is opened It closes device 6 to be made of shell 1, push rod 2 and microswitch 3, the cavity that shell 1 is made of pedestal 11 with lid 12 is for accommodating One or more microswitches 3, the embodiment of the shell 1 of the utility model are a pedestal 11 and two identical lids 12 bottom of at The two sides of seat 11 form two cavities, accommodate 2 microswitches 3 respectively, and Fig. 4 merely illustrates side and is made of pedestal 11 and lid 12 Cavity and receiving microswitch 3.The push rod 2 is placed in shell 1 and accommodates the interior simultaneously hub setting of cavity of microswitch 3 in pedestal On 11, one end is used to realize mechanical couplings, the realization of shaft 8 of the other end and breaker unit contact system with microswitch 3 Mechanical couplings.The microswitch 3 has a contact 31 matched with push rod 2.Breaker unit contact system turns Axis 8 and microswitch 3 are by the realization mechanical couplings of push rod 2, and shaft rotation drives push rod 2 to move, and push rod 2 is transported with movable contact 31 Dynamic, driving microswitch 3 acts.Push rod 2 can be corresponded with microswitch 3, can also be driven simultaneously with a push rod 2 more A microswitch 3.

As shown in figure 5, the power supply of residual current trip takes any two-phase power supply of major loop, the present embodiment is to take major loop A, C two-phase power supply is connected with residual current protecting unit, residual current between residual current control unit and main circuit power Protection location is made of auxiliary switchgear, and two microswitch K1, K2 are used in the auxiliary switchgear of the present embodiment, micro- The A phase power supply of a termination major loop of dynamic switch K1, another termination residual current control unit, a termination master of microswitch K2 The C phase power supply in circuit, another termination residual current control unit, two microswitches all pass through push rod and breaker unit contact The rotor axis mechanical of system couples.

When breaker unit closes a floodgate, microswitch K1, K2 closure are mounted on breaker and turn when breaker unit movement N phase contact reprimand on axis is opened, while breaker rotating axis rotates, and drives the putter action of auxiliary switchgear, discharges microswitch Button, the movable contact and stationary contact of microswitch become open position from closed position, to disconnect residual current control unit With the connection of power supply.

The mechanical couplings not only can drive putter action by breaker rotating axis, can also be according to the specific of breaker Structure uses other various ways, for example, driving putter action by the upper contact head of breaker；Or it is returned by the tripping on breaker The revolving meber sampled in shaft drives the putter action of auxiliary switchgear；It can also be by the tiller band dynamic auxiliary of breaker The putter action etc. of switching device.

Fig. 6 shows the basic structure of another embodiment of the utility model, as shown in fig. 6, slightly not with a upper embodiment It is same, a microswitch K3 is additionally provided in auxiliary switchgear, for providing the division state instruction of breaker unit. As instruction of closing a floodgate, one group of normally opened contact indicates one group of normally-closed contact of microswitch K3 as separating brake, and divide-shut brake signal is sent Enter residual current trip, to provide the division state instruction of breaker unit.

Claims (5)

1. a kind of residual current action breaker, including breaker unit and residual current trip；The residual current tripping Device is using protected major loop as power supply comprising residual current transformer, residual current control unit, residual current tripping are single Member, it is characterised in that: the residual current trip further includes residual current associated with the division state of breaker unit Protection location, when breaker unit is in "on" position, the residual current protecting unit enables residual current trip and leads back Current supply circuit conducting between road, when breaker unit is in gate-dividing state, the residual current protecting unit enables residual current Current supply circuit between buckle releaser and major loop disconnects.

2. residual current action breaker as described in claim 1, which is characterized in that the residual current protecting unit includes one Mechanical switch that group is serially connected in the current supply circuit between residual current trip and major loop and enable the mechanical switch with Breaker unit realizes the mechanical couplings mechanism of mechanical couplings, when breaker unit is in "on" position, the mechanical couplings machine Structure drives the mechanical switch conducting, and when breaker unit is in gate-dividing state, the mechanical couplings mechanism drives the machinery Switch disconnects.

3. residual current action breaker as claimed in claim 2, which is characterized in that the mechanical switch be microswitch or after Electric appliance.

4. residual current action breaker as claimed in claim 2, which is characterized in that the residual current protecting unit further includes For providing the additional mechanical switch of the division state instruction of breaker unit, the additional mechanical switch and breaker unit machine Tool coupling, the switch state of additional mechanical switch and the division state of breaker unit respectively correspond.

5. residual current action breaker as claimed in claim 2, which is characterized in that the residual current protecting unit further includes For accommodating the shell of the mechanical switch.