CN104347321B - Low pressure residual current device with the solid neutral conductor - Google Patents

Abstract

A residual current device comprising: a shaped housing; at least one pair of electrical contacts, the pair of electrical contacts comprising a movable contact and a fixed contact, adapted to be electrically connected to a phase conductor of an electrical circuit, and to be interconnected or disconnected from each other; a residual current protective device positioned in said shaped housing, preferably for detecting a residual current between conductors of an electrical line and generating a first trip signal. The residual current device further includes: a first connection element, the first connection element includes: a first connection part, the first connection element can be connected to a first conductor at the first connection part, and the first conductor is connected to the a residual current protective device operative connection; and a second connection portion at which the first connection element is connectable to a second connection element for connection to a neutral conductor of an electrical circuit .

Description

Low voltage residual current device with solid neutral

technical field

The invention relates to the field of residual current devices for low-voltage electrical lines.

More particularly, the invention relates to low voltage residual current installations with a solid (non-segmented) neutral.

Background technique

In the framework of the present invention, the term "low voltage" refers to voltages below 1 kV AC and 1.5 kV DC.

Numerous examples of residual current devices, in particular for single-phase or three-phase low-voltage electrical lines, are available on the market.

It should be known that a residual current device (RCD) is a circuit breaker capable of interrupting an electrical line connecting a power source and an electrical load when an on-board protection unit detects the presence of an unbalanced current (residual current) between the conductors of the electrical line.

Some RCDs are arranged to provide protection against the flow of overload current along electrical lines (overload protection).

To this end, they can be provided with a magneto-thermal trip unit capable of causing interruption of the electrical line as soon as the current exceeds a given threshold.

It will be appreciated that a distinguishing feature of some RCDs is that they do not interrupt the neutral conductor when they intervene for some reason, eg when residual current and/or overload current is detected.

In other words, when they trip, these devices operate to only segment the phase conductors of the electrical line, but not the neutral conductor (solid neutral).

RCDs with a solid neutral are usually connected to the supply part of the neutral conductor (i.e. the part of the neutral conductor that is connected to the mains) by a neutral connection cable protruding from the RCD's housing, and to the neutral conductor The connection of the load part of the conductor, ie the part of the neutral conductor which is connected to the load, is usually arranged at the neutral terminal of the RCD.

In some RCDs with a solid neutral, the neutral connection cable is routed during assembly operations while the enclosure of the circuit breaker is still open.

Such a solution leads to a deficiency in the flexibility of the product management method. In fact, in these RCDs it is very difficult to intervene in the neutral connection cable (eg for customization purposes) once the housing has been finally assembled.

Some RCDs are available on the market with a solid neutral, where the contact plate is solidly connected to and protrudes from the housing.

Such a contact plate is suitable for connection with said neutral connection cable when the housing of the RCD has been assembled.

Although it has the advantage of being able to easily and quickly customize the neutral connection cable, this solution still has some drawbacks depending on the needs of the installation.

RCDs provided with external contact plates are relatively bulky and they may be difficult to mount on the switch plate, especially when the available installation space is relatively small, as usually happens.

Furthermore, complex and expensive insulation structures are required to guarantee a suitable level of safety, since the electrical connection between the RCD and the neutral connection cable is arranged outside the RCD housing.

Contents of the invention

The main object of the present invention is to provide a low-voltage residual current device (RCD) with a solid neutral that overcomes the aforementioned drawbacks.

Within the scope of this main aim, another object of the present invention is to provide an RCD that offers considerable flexibility in the product management method, especially with regard to the customization of the electrical connection to the neutral conductor.

Another object of the present invention is to provide an RCD which has a compact structure and which is relatively easy to mount on a switchboard even though the available mounting volume is relatively small.

Another object of the invention is to provide an RCD which guarantees a relatively high level of safety.

Another object of the present invention is to provide an RCD which is easy to manufacture on an industrial scale at a cost competitive with respect to devices of the state of the art.

According to the present invention, the above main objects and objects and others, which will be apparent from the following description and accompanying drawings, are achieved by a residual current device (RCD) for low voltage electrical lines as described below.

In general definition, according to the present invention, RCD includes:

shaped shell;

at least one pair of electrical contacts, the pair of electrical contacts comprising movable contacts and fixed contacts adapted to be electrically connected to phase conductors of the electrical circuit and adapted to be interconnected or disconnected from each other;

a residual current protective device positioned in said shaped housing, preferably adapted to detect a residual current between conductors of an electrical line and to generate a first trip signal.

The RCD according to the present invention further comprises: a first connection element comprising: a first connection portion at which the first connection element can be connected to a first conductor, the first conductor to said residual current protection device is operatively coupled; and a second connection portion at which said first connection element is connectable to a second connection element adapted to be connected to a neutral line of an electrical circuit conductor connection.

According to the invention, said first connecting element is movable according to the insertion direction between a first position in which said second connecting part is positioned externally with respect to the housing of the RCD, and a second position in which said second connecting part In a position, the second connection portion is positioned within an interior volume defined by the housing. Preferably, the RCD according to the invention comprises blocking means configured to prevent movement of said first connecting element according to the extraction direction when said first connecting element is in said first position or said second position , the removal direction is opposite to the insertion direction.

Preferably, said blocking means comprise first blocking means of said first connection element and second and third blocking means of said housing.

When said first connecting element is in said first position, said first and second blocking means cooperate with each other so as to prevent movement of the first connecting element according to said extraction direction.

When said first connecting element is in said second position, said first and third blocking means cooperate with each other so as to prevent movement of the first connecting element according to said extraction direction.

Preferably, the first connection element comprises a blocking portion protruding from the first surface of said first connection element.

Preferably, when said first connection element is in said first and second position, respectively, the blocking portion is adapted to be inserted respectively into a first and a second slot obtained in said casing.

Preferably, the first blocking means comprises a first blocking surface of the blocking part of said first connection element, the second blocking means comprises a second blocking surface of said first slot of said housing, and the third blocking means comprises said The third blocking surface of the second slot of the housing.

The first and second blocking surfaces are advantageously arranged such that the first blocking surface is positioned opposite the second blocking surface when the blocking portion of the first connection element is inserted into the first slot of the housing.

The first and third blocking surfaces are advantageously arranged such that the first blocking surface is positioned opposite the third blocking surface when the blocking portion of the first connection element is inserted into the second slot of the housing.

Preferably, the blocking portion of the first connection element comprises an inclined surface arranged to allow the blocking portion when the first connection element moves from the first position to the second position according to the insertion direction. out the first slot of the housing.

Preferably, the RCD according to the invention comprises magneto-thermal protection means positioned inside the housing, adapted to detect overcurrents flowing along the phase conductors of the electrical line and to generate Second trip signal.

Preferably, the RCDs according to the invention comprise actuating means positioned inside the housing, adapted when they receive a trip signal from said residual current protective device and/or said magneto-thermal protective device Separate the movable contacts of the RCD from the fixed contacts.

In yet another aspect, the invention relates to a method for manufacturing an RCD.

According to the invention, the method comprises the steps of:

There is provided an RCD in one of the above embodiments, said RCD comprising at least:

a shaped housing defining an internal volume of said residual current device;

at least one pair of electrical contacts, the pair of electrical contacts comprising movable contacts and fixed contacts adapted to be electrically connected to said phase conductors and adapted to be connected to each other or separated from each other;

a residual current protective device positioned in said shaped housing;

The first connection element, the first connection element includes: a first connection part, the first connection part can be connected with the first conductor at the first connection part, and the first conductor is operatively coupled with the residual current protection device and a second connection portion at which the first connection element is connectable to a second connection element adapted to be connected to a neutral conductor of an electrical circuit, the first connection The element is movable according to the direction of insertion between a first position, in which the second connection part is positioned externally relative to the housing of the RCD, and a second position, in which the second connection part partially positioned within an interior volume defined by the housing;

connecting a first connection portion of the first connection element to the first conductor;

positioning the first connection element in the first position;

connecting a second connection portion of the first connection element to the second connection element when the first connection element is in the first position;

When the second connection portion of the first connection element is connected with the second connection element, the first connection element is moved from the first position to the second position according to the insertion direction.

Description of drawings

Other characteristics and advantages of the present invention will become clearer through the following description and with reference to the accompanying drawings, which are non-limiting examples, in which:

Figure 1 schematically shows a general view of an RCD according to the invention;

Figures 2-4 schematically show some views of an RCD according to the invention in different operating positions;

Figures 5-6 schematically show further views of an RCD according to the invention in different operating positions;

Figure 7 schematically shows a first connection element comprised in an RCD according to the invention; and

Fig. 8 schematically shows an example of an electrical circuit comprising an RCD according to the invention.

detailed description

With reference to the above figures, the invention relates to a residual current device (RCD) 1 for a voltage electrical line 100 .

The RCD 1 comprises a shaped housing 2 (eg made of plastics material) which defines an internal volume of the RCD.

The electrical line 100 electrically connects the power source 200 with the electrical load 300 and comprises at least one phase conductor 101 and at least one neutral conductor 102 .

The electrical line 100 is preferably of the three-phase or single-phase type.

In the following, the RCD will be described with reference to its application in single-phase electrical lines, for the sake of simplicity only and without limiting the scope of the invention.

The phase conductor 101 includes: a phase supply part 1011 electrically connected to the power source 200 ; and a phase load part 1012 electrically connected to the load 300 .

Preferably, the RCD 1 comprises a first phase terminal 151 and a second phase terminal 152 . When the RCD 1 is operatively mounted, the phase supply part 1011 is electrically connected to the first phase terminal 151 , and the phase load part 1012 is electrically connected to the second phase terminal 152 .

The RCD 1 comprises at least one electrode 14 comprising at least one movable contact and at least one fixed contact, which are preferably electrically connected to the phase terminals 151 , 152 of the RCD 1 .

These electrical contacts are therefore intended to be electrically connected to the phase conductor 101 via phase conducting paths extending through the phase terminals 151 , 152 .

The movable and fixed contacts of the electrodes 14 are adapted to be coupled to each other or separated from each other in order to allow/interrupt current flow along the phase conducting path between the phase terminals 151 , 152 and thus along the phase conductor 101 .

The number of electrodes comprised in the RCD 1 obviously depends on the number of phase conductors of the electrical line 100 .

The RCD 1 is provided with a solid neutral, ie has a neutral conductive path which can be connected to the neutral conductor 102 and which is never sectioned during operation of the RCD 1 .

The RCD 1 comprises a first connection element 3 , a second connection element 42 and a first conductor 41 which form a neutral conducting path of the RCD 1 .

The first connection element 3 comprises a first connection portion 31 at which the first connection element can be connected with a first conductor 41 which in turn is electrically connected with the neutral terminal 153 of the RCD 1 .

The first connection element 3 comprises a second connection portion 31 at which the first connection element is connectable with a second connection element 42 adapted to be connected with the neutral conductor 102 .

The RCD 1 is connected to the neutral conductor 102 through the neutral terminal 153 and the second connection element 42 .

The neutral conductor 102 includes: a neutral supply part 1021 electrically connected to the power source 200 ; and a neutral load part 1022 electrically connected to the load 300 .

Preferably, when the RCD 1 is installed, the neutral wire supply part 1021 is electrically connected with the second connection element 42 protruding from the housing 2 , while the neutral wire load part 1022 is electrically connected with the neutral wire terminal 153 . The RCD 1 comprises a residual current protective device 11 positioned inside the housing 2 .

The residual current protection device 11 , which may be of a known type, is advantageously able to detect a residual current between the conductors 101 , 102 of the electrical line 100 and to generate a first trip signal T1 according to the trend of said residual current.

Preferably, the residual current protection device 11 comprises a current detection device 111 for detecting the residual current, the current detection device 111 comprising at least one current transformer, the current transformer having Phase conducting path and neutral conducting path) form the first winding.

Preferably, the first conductor 41 of the RCD 1 is operatively coupled with the residual current protection device 11 , in particular with the converter 111 , so as to form a first winding of the converter.

Preferably, the residual current protection device 11 includes an electronic device (such as a microcontroller operatively coupled with a filter circuit), which receives the output signal from the current sensor 111 and generates a signal according to the detected trend of the residual current The trip signal T1.

Preferably, the RCD 1 is an electronic residual current device with overload protection.

In this example, the RCD 1 is provided with a residual current protection device 11 and a magneto-thermal protection device 12 .

The magneto-thermal protection device 12 , which may be of a known type, is configured to detect an overcurrent flowing along the phase conductor 101 and to generate a second trip signal T2 according to the tendency of said overcurrent.

Preferably, the RCD 1 comprises actuating means 13 (which may be of a known type) for causing the The movable contacts of the electrodes 14 are separated from the fixed contacts.

Preferably, the first connecting element 3 of the RCD 1 is formed from a shaped plate of electrically conductive material, such as steel covered by a layer of copper, which first connecting element can be produced by known industrial manufacturing methods (moulding, stamping, etc.) to get.

Preferably, the first conductor 41 of the RCD 1 is formed by a first electrical cable, which may be of a known type. Alternatively, it may be formed by conductive rods or similar structures.

Preferably, the connection between the first connection element 3 and the first conductor 41 is obtained by soldering, stamping or other similar techniques. As an alternative, this connection can be movable, such as a plug-socket connection.

Preferably, the second connection element 42 is formed by a second conductor, advantageously a second cable, which may be of a known type.

Preferably, the connection between the first connection element 3 and the second conductor 42 is obtained by soldering, stamping or other similar techniques. As an alternative, it can be a plug-socket connection or other transportable type of connection.

According to the invention, the first connecting element 3 is movable according to the insertion direction D1 between a first position 201 and a second position 202 in which the second connecting part 32 is positioned externally with respect to the housing 2 , in which In this second position, the second connecting portion 32 is positioned within the inner volume defined by the housing 2 .

Advantageously, as better described below, when the first connection element 3 is in the first position 201 , the second connection portion 32 is electrically connected with the second connection element 42 .

When the first connection element 3 is in the first position 201 , the second connection portion 32 advantageously protrudes from the housing 2 .

Conveniently, the first connecting element 3 moves from the first position 201 to the second position 202 when the second connecting part 32 is finally connected with the second connecting element 42 .

When the first connection element 3 is in the second position 202, the second connection part 32 (and preferably any other part of the connection element 3 ) is completely housed within the volume defined by the housing 2 and it no longer protrudes from the housing 2 .

Preferably, when the first connecting element 3 is in the second position 202 , the second connecting element 42 protrudes from the housing 2 .

In this way, the second connection element 42 can be easily connected to the neutral conductor 102 (for example by known connection techniques).

Preferably, the RCD 1 comprises blocking means 331, 221, 231 configured to prevent the first connection element 3 from being moved according to the extraction direction D2 (with the insertion direction D2) when the first connection element 3 is in the first position 201 or the second position 202. movement in the opposite direction to D1).

Preferably, the blocking means 331 , 221 , 231 are configured to only allow movement of the connection element 3 according to the insertion direction D1 , in particular when the connection element 3 is in the first position 201 .

The blocking means of the RCD 1 comprise first blocking means 331 of the first connection element 3 , preferably formed by its first blocking surface 331 .

The blocking means of the RCD 1 further comprises a second blocking means 221 and a third blocking means 231 of the housing 2, which are preferably formed by the second blocking surface 221 and the third blocking means of the housing 2, respectively. Surface 231 is formed.

The first blocking means 331 and the second blocking means 221 cooperate with each other so as to prevent the movement of the first connecting element 3 according to the extraction direction D2 when the connecting element 3 is in the first position 201 .

The first blocking means 331 and the third blocking means 231 cooperate with each other so as to prevent the movement of the first connecting element 3 according to the extraction direction D2 when the connecting element 3 is in the second position 202 .

Preferably, the first connection element 3 comprises a first surface 34 opposite a second surface 35 at which the connection element 3 can be connected with the first conductor 41 and the second connection element 42 .

Preferably, the first surface 34 rests on the guide surface 21 of the housing 2 when the connecting element 3 is positioned in the operating positions 201 , 202 or moved between them.

Preferably, the guide surface 21 can be obtained by an inner shaped rib or edge of the housing 2 .

Preferably, the first connection element 3 comprises a blocking portion 33 protruding from the first surface 34 .

Preferably, the blocking portion 33 comprises a first blocking surface 331 forming said first blocking means.

Preferably, the blocking portion 33 of the connecting element 3 is inserted into the first slot 22 and the second slot 23 of the housing 2, respectively, when the connecting element 3 is in the operating positions 201 and 202, respectively.

Preferably, the first and second slots 22 , 23 are obtained in the guide surface 21 of the housing 2 .

Preferably, the first slot 22 comprises a second blocking surface 221 forming said second blocking means and the second slot 23 comprises a third blocking surface 231 (forming said third blocking means).

Advantageously, the first blocking surface 331 and the second blocking surface 221 are arranged such that when the blocking portion 33 is inserted into the first slot 22 (ie when the first connecting element 3 is in the first position 201), the first blocking surface 331 faces the second blocking surface 221 .

In this way, when the blocking portion 33 is inserted into the first slot 22 , the first blocking surface 331 is positioned opposite the second blocking surface 221 .

The surfaces 331 , 221 facing each other are thus able to prevent movement of the connecting element 3 according to the extraction direction D2 .

Advantageously, the first blocking surface 331 and the third blocking surface 231 are arranged such that when the blocking portion 33 is inserted into the second slot 23 (ie when the first connecting element 3 is in the second position 202), the first blocking surface 331 faces the third blocking surface 231 .

In this way, when the blocking portion 33 is inserted into the second slot 23 , the first blocking surface 331 is positioned opposite to the third blocking surface 231 .

The surfaces 331 , 231 facing each other are thus able to prevent movement of the connecting element 3 according to the extraction direction D2 .

Preferably, the first blocking surface 331 is oriented perpendicularly with respect to the first surface 34 of the first connection element 3 , whereas the second and third blocking surfaces 221 , 231 are oriented perpendicularly with respect to the guide surface 21 of the housing 2 .

In this way, an undercut coupling is advantageously obtained between the opposing surfaces 331 , 221 and between the opposing surfaces 331 , 231 respectively when the blocking portion 33 is inserted into the first slot 22 and the second slot 23 respectively.

Apparently, when the first connecting element 3 is in the first position 201 and the second position 202, any movement of the connecting element 3 according to the extraction direction D2 will be subjected respectively to the opposing surfaces 331, 221 and between the opposing surfaces 331, 231. opposing barriers.

Preferably, the blocking portion 33 of the connecting element 3 is shaped like an inverted wedge, and it includes a shaped inclined surface 332 extending from the edge 331A of the first blocking surface 331 (at the edge 331A relative to the first connecting element 3 ). In a distal position of the first surface 34 ) extends toward the first surface 34 .

Preferably, the inclined surface 332 is oriented to allow the blocking portion 33 to leave the first slot 22 when the first connecting element 3 is moved from the first position 201 to the second position 202 .

The inclined surface 332 advantageously forms an angle of less than 90° with the first surface 34 of the first connecting element 3 (in a position distal from the edge 331A of the blocking portion 33 ).

In this way, when the connecting element 3 is moved towards the insertion direction D1 , the inclined surface 332 slides on the edge 222 of the first slot 22 , which edge 222 is positioned opposite the blocking surface 221 of the slot 22 .

In this way, the movement of the connection element 3 according to the insertion direction D1 is not prevented.

In yet another aspect, the invention relates to a method for assembling an RCD.

The method comprises the step of providing the RCD 1 in one of the embodiments described above.

The method of the invention comprises the step of connecting the first connection portion 31 of the first connection element 3 with the first conductor 41 .

Advantageously, this step is carried out during the assembly of the housing 2 of the RCD 1 while the housing 2 is still open.

Preferably, before being connected with the first connecting element 3 , the first conductor 41 is connected with the neutral line terminal 153 and coupled with the residual current protection device 11 .

The method of the invention comprises the step of positioning the first connection element 3 in the first position 201 .

This step is also advantageously carried out during the assembly phase of the housing 2 of the RCD while the housing 2 is still open.

According to the method of the invention, the first connection element 3 will be positioned in the first position 201 once the assembly of the housing 2 is complete.

When the first connecting element 3 is in the first position 201 , any movement according to the extraction direction D2 will be prevented by the interaction between the first and second blocking means 331 , 221 .

The method of the invention comprises the step of connecting the second connection portion 32 of the first connection element 3 with the second connection element 42 when said first connection element is in this first position 201 .

The method of the invention comprises the step of moving the first connection element 3 from the first position 201 to the second position 202 when the second connection part 32 is finally connected to the second connection element 42 .

When the connecting element 3 is in the second position 202 , any movement according to the extraction direction D2 will be prevented by the interaction between the first and third blocking means 331 , 231 .

Furthermore, when the connecting element 3 is in the second position 202 , the second connecting element 42 protrudes from the housing 2 .

At this point, the RCD 1 is easily installed on site by having the terminals 151, 152, 153 and the connecting element 42 connected to the phase conductor 101 and the neutral conductor 102 respectively, as described above.

It has also been shown in practice that the residual current device 1 according to the invention offers clear advantages over the solutions available in the state of the art.

The connecting element 42 of the electrical line with the neutral conductor can be customized as required without intervening in the housing 2, which significantly simplifies the manufacturing process while ensuring great flexibility in the customization of the connection structure with the neutral conductor. High level of flexibility.

On the other hand, when it is finally constructed (connection element 3 moved into position 102), RCD1 offers a very compact construction and is therefore easy to install on the switchboard.

When the connection element 3 is finally inserted (movement D1 ) inside the housing 2, an optimum insulation of the electrical connection between the first and second connection element 3, 42 can be obtained, thus ensuring a suitable level of safety.

The RCD 1 has proven to be relatively easy to manufacture on an industrial level at a cost competitive with devices of the state of the art.

Claims (9)

1. one kind is used for the residual current device (1) of low-voltage electrical circuit (100), including at least one phase conductor (101) and extremely A few neutral conductor (102), the residual current device include：

Outer profiled shell (2), the outer profiled shell define the internal capacity of the residual current device；

At least one armature contact and at least one fixed contact, the armature contact and fixed contact are suitable to and the phase conductor Electrical connection, and be adapted to mutually connect or separate each other；

Aftercurrent protecting equipment (11), the Aftercurrent protecting equipment are positioned in the outer profiled shell (2)；

First connecting element (3), first connecting element include：The first pontes (31), first connecting element can be The first pontes (31) place couples with the first conductor (41), and first conductor (41) is grasped with the Aftercurrent protecting equipment Work couples；And second connecting portion point (32), first connecting element can connect at the second connecting portion point (32) place and second Element (42) connection is connect, second connecting element is suitable to be connected with the neutral conductor,

It is characterized in that：First connecting element (3) can be according to direction of insertion (D1) and in first position (201) and second Position is moved between (202), and in first position, the second connecting portion point (32) positions relative to the outer profiled shell (2) In outside, in the second position, the second connecting portion point (32) is positioned at the internal capacity limited by the outer profiled shell (2) It is interior.

2. residual current device according to claim 1, it is characterised in that：The residual current device includes retention device (331,221,231), the retention device are configured to when first connecting element is in the first position (201) or institute Prevent motion of first connecting element according to removing direction (D2) when stating the second place (202), the removing direction with it is described Direction of insertion is opposite.

3. residual current device according to claim 2, it is characterised in that：The retention device includes the described first connection The first retention device (331) of element (3) and the second of the outer profiled shell (2) and the 3rd retention device (221,231), when When first connecting element is in the first position (201), first and second retention device cooperates, to hinder Only the first connecting element (3) is according to the removing direction (D2) motion, when first connecting element is in the second When putting (202), described first and the 3rd retention device cooperate, to prevent the first connecting element (3) according to the taking-up The motion in direction (D2).

4. residual current device according to claim 3, it is characterised in that：First connecting element (3) includes stopping Partly (33), the stop portions are protruded from the first surface (34) of first connecting element, when first connecting element (3) During in the first position (201), the stop portions (33) are adapted for insertion into first obtained in the outer profiled shell (2) Slit (22), when first connecting element (3) is in the second place (202), the stop portions (33) are suitable to insert Enter the second slit (23) obtained in the outer profiled shell (2).

5. residual current device according to claim 4, it is characterised in that：First retention device includes the stop Partly first stop surface (331) of (33), the second retention device include the second stop surface of first slit (22) (221), the 3rd retention device includes the 3rd stop surface (231) of second slit (23).

6. residual current device according to claim 5, it is characterised in that：First, second, and third stop surface It is arranged to so：When the stop portions (33) are inserted in first slit (22), first stop surface (331) is fixed Position opposes into second stop surface (221), when the stop portions are inserted in second slit (23), described the One stop surface (331) is positioned to oppose with the 3rd stop surface (231).

7. the residual current device according to any one in claim 4 to 6, it is characterised in that：The stop portions (33) inclined surface (332) is included, the inclined surface is arranged to when first connecting element (3) is according to the direction of insertion (D1) stop portions are allowed to leave described when moving to the second place (202) from the first position (201) One slit (22).

8. residual current device according to claim 1, it is characterised in that the residual current device includes：

The Aftercurrent protecting equipment (11), the Aftercurrent protecting equipment be adapted to detect for the electric wiring conductor it Between residual current, and the first trip signal (T1) is produced according to the trend of the residual current；

Magnetic-thermel protection device (12), the magnetic-thermel protection device are positioned inside the outer profiled shell, are adapted to detect for along the phase The overcurrent of conductor flowing, and the second trip signal (T2) is produced according to the trend of the overcurrent；And

Device (13) is actuated, this actuates the inside that device (13) is positioned at the outer profiled shell, is adapted so that the armature contact Separated with the fixed contact.

A kind of 9. method for assembling residual current device, it is characterised in that the described method comprises the following steps：

Residual current device (1) according to any one of claim 1-8 is provided；

So that the first pontes (31) of first connecting element (3) is connected with first conductor (41)；

First connecting element (3) is positioned in the first position (201)；

When first connecting element is in the first position (201) so that the second of first connecting element (3) connects Socket part point (32) is connected with second connecting element (42)；

When the second connecting portion point (32) of first connecting element (3) is connected with second connecting element (42) so that First connecting element (3) moves to the second according to the direction of insertion (D1) from the first position (201) Put (202).