CN220439533U - Intelligent molded case circuit breaker - Google Patents

Abstract

The utility model discloses an intelligent molded case circuit breaker, which comprises a shell, a controller, a current transformer, a second circuit board, a release and an operating mechanism, wherein the current transformer and the release are electrically connected with a first control module to form a first protection component, and the first protection component is used for driving the release to realize the opening movement of the operating mechanism when the current on a main loop conductor is abnormal; the second circuit board is also provided with a second control module, the main loop conductor is also provided with a temperature sampling element, the temperature sampling element and the release are electrically connected with the second control module to form a second overload protection assembly, and the second overload protection assembly is used for driving the release to realize the opening movement of the operating mechanism when the temperature of the main loop conductor is abnormal due to overload of the main loop; the utility model has the characteristic of overload protection even if the controller is pulled out.

Description

Intelligent molded case circuit breaker

Technical Field

The utility model relates to the field of low-voltage electricity, in particular to an intelligent molded case circuit breaker.

Background

A molded case circuit breaker, which is one of the circuit breakers, is very widely used in the technical field of power distribution. The conventional molded case circuit breaker has overload protection, instantaneous protection functions and the like. The specific implementation function of the overload protection is divided into an electronic type form and a mechanical type form (also called a thermomagnetic type structure) according to different implementation modes, and the operating mechanism is driven to trip through the heating bending of the bimetallic strip. The electronic type tripping device is specifically realized in the mode that the electronic type tripping device comprises a controller, a current transformer and a tripping device, wherein a control module is arranged in the controller, the current transformer is electrically connected with the tripping device and the control circuit, current information is sampled through the current transformer, the control module judges whether a preset threshold value is reached or not according to the sampled current information, and when the preset threshold value is reached, a tripping signal is sent to the tripping device, and the tripping device drives an operating mechanism to trip after receiving the signal.

The technology of such electronic type molded case circuit breaker is well established, but in some specific fields, customers worry about the possible damage of the controller, and the like, so that the controller must be pluggable, so that when the controller is damaged, only the controller needs to be replaced, and the whole circuit breaker does not need to be replaced. However, the controller with such a structure is abnormally dangerous after being pulled out, for example, if a user forgets to reload the controller, the circuit breaker is directly started, and the overload protection function of the circuit breaker is not realized, so that the overload protection of the load in the circuit cannot be realized, and therefore, a great potential safety hazard exists. As disclosed in CN218333649U, the circuit breaker will lose overload protection once its control module (i.e. the controller described above) is pulled out.

There is a circuit breaker with busbar overheat protection in the art, and this kind of overheat protection is realized through control module, temperature sampling element, release, and temperature sampling element gathers busbar temperature and gives control module, when control module detects that temperature exceeds the threshold value, drives operating device brake-separating through the release. When the overload occurs in the circuit, the busbar in the circuit breaker often generates heat, and the inventor discovers that the busbar overheat protection structure (such as CN209709673U, the disclosed principle of the busbar overheat protection) can be completely applied to realize the overload protection function through a large number of experiments.

Therefore, how to design a circuit breaker capable of realizing overload protection through over-temperature protection in the circuit breaker under the condition that the controller is pulled out is a direction worthy of research.

Disclosure of Invention

Therefore, the utility model aims to overcome the defects in the prior art, and aims to provide an intelligent molded case circuit breaker which has an overload protection function when a controller is removed.

The utility model provides an intelligent molded case circuit breaker, which comprises a shell, a controller, a current transformer, a second circuit board, a release and an operating mechanism, wherein the controller is arranged on the shell; the shell is provided with a module bin for accommodating a controller, the controller is removably arranged in the module bin, and a first control module is arranged in the controller; the current transformer, the release, the second circuit board and the operating mechanism are all arranged in the shell, the controller and the second circuit board are in plug-in fit to realize the electric connection of the first control module and the second circuit board, the current transformer and the release are all in electric connection with the first control module to form a first protection assembly, and the first protection assembly is used for driving the release to realize the opening movement of the operating mechanism when the current on the main loop conductor is abnormal; the second circuit board is also provided with a second control module, the main loop conductor is also provided with a temperature sampling element, the temperature sampling element and the release are electrically connected with the second control module to form a second overload protection assembly, and the second overload protection assembly is used for driving the release to realize the opening movement of the operating mechanism when the main loop is overloaded and the temperature of the main loop conductor is abnormal.

By adopting the structure, firstly, the switch can have overload protection and instantaneous protection functions by utilizing the first protection component, namely a conventional electronic protection mode in the prior art; secondly, adopt the second overload protection subassembly can realize that the circuit breaker has overload protection function, more specifically, the second overload protection subassembly is irrelevant with the controller, but forms through temperature sampling element, second control module and release, even if the controller is removed, the circuit breaker still possesses overload protection function, compares in prior art, improves load circuit's security, reduces the risk.

In some embodiments of the present application, the housing includes a base having at least two pole primary loop chambers disposed thereon, wherein at least two pole primary loop chambers have primary loop conductors disposed therein, each primary loop conductor having a temperature sampling element disposed thereon.

By adopting the structure, each main loop conductor is provided with the temperature sampling element, and the common plastic shell type circuit breaker is at least 2 poles, so that overload protection can be realized when any pole is abnormal by adopting the arrangement.

In some embodiments of the present application, the main loop conductor includes a first terminal, a first conductive member, a moving contact, a stationary contact, and a second terminal; the first wiring terminal is electrically connected with one end of the first conductive piece, and the first wiring terminal and the first conductive piece are integrated or split pieces; the other end of the first conductive piece is electrically connected with the moving contact; the fixed contact is electrically connected with the second wiring end, and the fixed contact and the second wiring end are integrated or separated; the temperature sampling element is positioned on the first conductive member.

In some embodiments of the present application, the main loop conductor includes a first terminal, a first conductive member, a second conductive member, a moving contact, a stationary contact, and a second terminal; the first wiring terminal is electrically connected with one end of the first conductive piece, and the first wiring terminal and the first conductive piece are integrated or split pieces; the first conductive piece is electrically connected with the movable contact through the second conductive piece, and the first conductive piece and the second conductive piece are of an integrated structure or a split structure; the second conductive piece is electrically connected with the movable contact through soft connection or hard connection; the fixed contact is electrically connected with the second wiring end, and the fixed contact and the second wiring end are integrated or separated; the temperature sampling element is arranged on the first conductive piece or the second conductive piece and also comprises a backup electromagnetic protector; the backup electromagnetic protector includes an armature disposed about the second conductive member and a yoke.

By adopting the structure, the backup electromagnetic protector is added, so that even if the controller is dismantled, the instantaneous protection can be realized through the backup electromagnetic protector; and the temperature sampling element is arranged near the junction of the first conductive piece and the second conductive piece, so that the temperature sampling element is arranged more adjacent to the moving contact, the accuracy of sampled temperature information is guaranteed, and the accuracy of overload protection is improved.

In some embodiments of the present application, the temperature sampling element is one of a platinum resistor, a thermistor, and a thermocouple.

The temperature sampling element adopts the common contact type temperature sampling elements and has the characteristics of high sampling precision, quick response and the like.

In some embodiments of the present application, the plug-in mating includes a first plug-in unit disposed on the controller and a second plug-in unit disposed on the second circuit board, where a set of control pins for controlling the enabling/disabling of the second overload protection component are disposed in the first plug-in unit and the second plug-in unit, and the control pins of the second plug-in unit are one of the pins of the second control module or one of the pins of the second plug-in unit is electrically connected with one of the pins of the second control module.

With this structure, the second overload protection component can be enabled/disabled by the control pin through the plugging of the controller, i.e. when the controller is plugged on the circuit board, the control pin will disable the second overload protection component at this time, because the first protection component is already sufficient to realize overload protection at this time; when the controller is pulled out, namely the control pins of the first plug-in unit and the second plug-in unit are not contacted, the second overload protection component is started, and at the moment, the controller is aged due to the fact that the first protection component is pulled out, and the second overload protection component can play a role in overload protection; the design clearly improves the compatibility of the product more strongly, and further avoids misoperation.

In some embodiments of the present application, the second circuit board is further provided with a normally closed switch located at the electrical connection position between the temperature sampling element and the second control module, and the controller is provided with a corresponding driving part; when the controller is not in plug-in fit with the second circuit board, the normally closed switch is in a closed state; after the controller is in plug-in fit with the second circuit board, the driving part drives the normally-closed switch to be in an on-off state, and the electrical connection between the temperature sampling element and the second control module is cut off.

By adopting the structure, as another implementation mode, the mode utilizes the plug of the controller to realize that the normally closed switch is turned into the on-off state, and can certainly realize the starting and the disabling of the second overload protection component, thereby improving the compatibility of products more strongly and further avoiding misoperation.

In some embodiments of the present application, a metering transformer is further sleeved on the main loop conductor, and the metering transformer is electrically connected with the controller through a second circuit board, and is used for sampling current information of the main loop conductor and feeding the current information back to the controller.

By adopting the structure, the circuit breaker can realize the metering function, and a user can conveniently acquire the electric quantity parameters through the circuit breaker.

In some embodiments of the present application, the housing further comprises a cover mated with the base, the module compartment being disposed on the cover; or, the shell further comprises a cover body arranged on the base and a top cover arranged on the cover body, and the module bin is arranged on the cover body or/and the top cover.

The structure can be applied to a plastic shell type circuit breaker with a top cover, and can also be applied to a plastic shell type circuit breaker with a base, a middle cover (cover body) and an upper cover.

In some embodiments of the present application, the number of trip units is two, one for constituting the first protection assembly and the other for constituting the second overload protection assembly.

With this configuration, as a modified embodiment, the trips of the two control loops may be provided separately.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing a structure of a molded case circuit breaker according to an embodiment of the present utility model;

fig. 2 shows an exploded view of a controller and a molded case circuit breaker according to one embodiment of the present utility model;

fig. 3 is a schematic diagram showing the structure of the molded case circuit breaker of the present utility model after the top cover, the cover body and the controller are removed;

FIG. 4 is a schematic diagram showing the structure of FIG. 3 after removing the second circuit board;

FIG. 5 is a schematic diagram of the main loop conductor, the transformer, the temperature sampling element, and the like according to one embodiment of the present utility model;

FIG. 6 shows a schematic structural view of another embodiment of the housing of the present utility model;

FIG. 7 illustrates a functional block diagram of a first protection component in one embodiment of the present utility model;

FIG. 8 illustrates a functional block diagram of a second overload protection assembly in one embodiment of the present utility model;

fig. 9-10 show several different embodiments of the shut-off structure according to the utility model, respectively.

Description of the embodiments

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1 to 10, an embodiment of the present utility model is an intelligent molded case circuit breaker, which can be widely used in a power distribution system to control on/off of a line and protect a load.

The molded case circuit breaker comprises a shell, an operating mechanism, an arc extinguishing system, a main loop conductor, a backup electromagnetic protector, a release 5, a current transformer 4, a metering transformer 7, a temperature sampling element 6, a second circuit board K2 and a controller K.

The housing is for accommodating the remaining components, and in this embodiment, the housing includes a base 11, a cover 12, and a top cover 13, the cover 12 is disposed on the base 11, and the top cover 13 is disposed on the cover 12. The base 11 is divided into two pole main loop spaces 15 by the inter-phase isolation ribs 14, and main loop conductors are arranged in the two pole main loop spaces 15, and in the embodiment, only two main loop conductors are arranged in the two pole main loop spaces, so that the base is called a 2 pole circuit breaker, and in addition, a 3 pole structure, a 4 pole structure and the like can be adopted.

The operating mechanism, the arc extinguishing system, the main loop conductor, the second circuit board K2, the current transformer 4 in the first protection component, the release 5 and other components are all arranged on the base 11. The top cover 13 is provided with a module bin 16, the controller K is arranged in the module bin 16, the controller K is electrically connected with the second circuit board K2 through a connector, and the controller K can be pulled out when the controller K needs to be replaced or removed. Of course, there are many embodiments of the module house 16, and as a modified embodiment, as shown in fig. 6, the module house 16 may be provided on the cover 12 (on the side of the top cover 13) instead of the top cover 13.

The operating mechanism comprises a handle, a lever, a frame, an upper connecting rod, a lower connecting rod, a jump buckle, a lock catch, a rebuckling, a traction rod 21 and the like, and belongs to the operating mechanism of a common plastic shell type circuit breaker, and when the operating mechanism is in a closing state, the traction rod 21 can cause the operating mechanism to realize opening operation if being triggered.

And an arc extinguishing system arranged near the fixed contact P5 and used for extinguishing the electric arc generated by the movable and fixed contacts P4 and P5 during breaking.

The main loop conductor mainly comprises a first wiring end P1, a first conductive piece P2, a second conductive piece P3, a moving contact P4, a fixed contact P5 and a second wiring end P6. The first terminal P1 and the second terminal P6 are both used for being connected with an external wire, that is, the circuit breaker can be connected into a loop with load through the first terminal P1 and the second terminal P6, so that the circuit breaker can control the on-off of the loop. The first conductive member P2 and the second conductive member P3 are in a busbar structure in this embodiment, one end of the busbar structure is electrically connected with the first terminal P1, and the electrical connection between the busbar structure and the first terminal P1 may be formed by integrally forming the first conductive member P2 and the first terminal P1, or may be connected with the first terminal P1 by adopting a welding mode. The other end of the first conductive member P2 is electrically connected to the second conductive member P3, and the same electrical connection may be formed by integrally forming the first conductive member P2 and the second conductive member P3, or may be connected to the second conductive member P3 by welding. The second conductive member P3 is electrically connected to the moving contact P4, and in this embodiment, the second conductive member P3 is electrically connected to the moving contact P4 through a soft connection, which may be achieved by a hard connection instead of the soft connection. The fixed contact P5 and the second wiring terminal P6 are integrally arranged, and the contact and separation between the fixed contact P5 and the fixed contact P5 are realized through the rotation of the movable contact P4 (under the action of an operating mechanism). The first conductive member P2 and the second conductive member P3 may be flexible connection, flexible braided wire, or the like, except for the busbar, so long as the electrical connection can be achieved.

The backup electromagnetic protector comprises a bracket 31, an armature 32 and a magnetic yoke 33, wherein the armature 32 is rotatably arranged on the bracket 31, the magnetic yoke 33 is fixed on the bracket 31, and a second conductive piece P3 penetrates through a space formed by the armature 32 and the magnetic yoke 33, so that when current flowing through a main loop conductor is abnormal, the magnetic yoke 33 can attract the armature 32 to rotate, and the armature 32 triggers the traction rod 21 to realize the opening operation of an operating mechanism, and the protection type is also called instant protection.

The controller K is internally provided with a first circuit board K1, a first control module K11 (the first control module K11 is an MCU, or one of an MPU or a DSP) and a first plug-in board K12 are arranged on the first circuit board K1, and the first circuit board K1 is in plug-in connection with a second plug-in board K21 on the second circuit board K2 through the first plug-in board K12 to ensure that the first control module K11 and the second circuit board K2 are electrically connected. Meanwhile, the current transformer 4 is electrically connected (wire connected) with the first circuit board K1, and the tripper 5 is electrically connected (wire connected) with the first circuit board K1. The first control module K11, the current transformer 4 and the release 5 form a first protection component, and the working principle of the first protection component is that the current transformer 4 is connected in series to the first conductive part P2, so that relevant parameters of current flowing through the first conductive part P2 can be sampled and fed back to the first control module K11, and when the relevant parameters exceed a threshold value, the first control module K11 is used for driving the release 5 to act (triggering the traction rod 21), so as to realize the opening operation of the operating mechanism. Such a first protection component may achieve both overload protection and transient protection.

The second circuit board K2 is provided with a second control module K22, and the temperature sampling element 6, the release 5 and the second control module K22 (the second control module K22 is an MCU, but may be one of an MPU and a DSP) are all electrically connected (connected by a wire). The temperature sampling element 6, the trip device 5 and the second control module K22 form a second overload protection assembly, and the working principle of the second overload protection assembly is that the temperature sampling element 6 is arranged on the first conductive parts P2 (each first conductive part P2 is provided with a temperature sampling element 6 for sampling the temperature parameter of the first conductive part P2 and feeding back to the second control module K22), when the temperature parameter exceeds a threshold value, the second control module K22 is used for driving the trip device 5 to act (trigger the traction rod 21) so as to realize the opening operation of the operating mechanism.

In order to increase the compatibility of the product, a shut-off structure may be provided as a preferred way, which enables and disables the function of the second overload protection assembly, i.e. the function of the second overload protection assembly is disabled when the controller K is in a plugged-in state with the second circuit board K2, and is enabled when the controller K is removed. As fig. 9 shows an embodiment of one of the shutdown structures, there is a set of control pins S1 in the first card K12 and the second card K21, the control pin S1 of the second card K21 is electrically connected with one pin of the second control module K22, and the second control module K22 can be used to identify whether the control pin S1 triggers to determine to enable or disable the function of the second overload protection component, that is, when the first card K12 (the controller K) is not inserted, the function of the second overload protection component is enabled; when the first plug-in K12 (controller K) is detected to be plugged in, the function of the second overload protection component is disabled. Such disabling the second overload protection component is embodied by enabling/disabling the second overload protection group by identifying whether the control pin S1 is triggered. The method controls the starting/disabling of the function through a pin of the MCU, belongs to a conventional design in the field of single chip microcomputer, does not improve the starting/disabling function on the aspect of software principle, and only applies the starting/disabling mode to the function of starting/disabling the second overload protection component. As another embodiment of the shutdown structure, as shown in fig. 10, a normally closed switch NF is further disposed on the first circuit board K1, and the normally closed switch NF is connected in series between the temperature sampling element 6 and the electrical connection of the second control module K22, that is, the electrical connection of the temperature sampling element 6 and the second control module K22 is controlled by the normally closed switch NF. The controller K is provided with a driving part KQ, which is used for triggering the normally closed switch NF to be turned into an on-off state, specifically, when the first plug-in component K12 is in plug-in connection with the second plug-in component K21 (the controller K is in the module bin 16), the driving part KQ triggers the normally closed switch NF to be turned into an on-off state, so that the electrical connection between the temperature sampling element 6 and the second control module K22 is cut off, and the second control module K22 will not receive the temperature information from the temperature sampling element 6, so as to achieve the effect of closing the function of the second overload protection component. When the controller K is pulled out, the driving portion KQ will not trigger the normally closed switch NF any more, and the normally closed switch NF is restored to the closed state, and the electrical connection between the temperature sampling element 6 and the second control module K22 is restored, so as to achieve the effect of opening the function of the second overload protection component.

In order to enable the circuit breaker to have a metering function, a metering transformer 7 is further sleeved on the first conductive part P2, the metering transformer 7 is electrically connected with the second circuit board through a wire (so that the electrical connection of the first control module K11 is also realized), and current information sampled by the metering transformer 7 can be fed back to the first control module K11.

Of course, in this embodiment, the first protection component and the second overload protection component share one trip unit, and an embodiment in which one trip unit is provided separately may also be adopted.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. An intelligent molded case circuit breaker, which is characterized in that: the device comprises a shell, a controller, a current transformer, a second circuit board, a release and an operating mechanism; the shell is provided with a module bin for accommodating a controller, the controller is removably arranged in the module bin, and a first control module is arranged in the controller; the current transformer, the release, the second circuit board and the operating mechanism are all arranged in the shell, the controller and the second circuit board are in plug-in fit to realize the electric connection of the first control module and the second circuit board, the current transformer and the release are all in electric connection with the first control module to form a first protection assembly, and the first protection assembly is used for driving the release to realize the opening movement of the operating mechanism when the current on the main loop conductor is abnormal; the second circuit board is also provided with a second control module, the main loop conductor is also provided with a temperature sampling element, the temperature sampling element and the release are electrically connected with the second control module to form a second overload protection assembly, and the second overload protection assembly is used for driving the release to realize the opening movement of the operating mechanism when the main loop is overloaded and the temperature of the main loop conductor is abnormal.

2. An intelligent molded case circuit breaker according to claim 1, wherein: the shell comprises a base, at least two pole main loop cavities are arranged on the base, main loop conductors are arranged in the at least two pole main loop cavities, and each main loop conductor is provided with a temperature sampling element.

3. An intelligent molded case circuit breaker according to claim 1, wherein: the main loop conductor comprises a first wiring end, a first conductive piece, a moving contact, a fixed contact and a second wiring end; the first wiring terminal is electrically connected with one end of the first conductive piece, and the first wiring terminal and the first conductive piece are integrated or split pieces; the other end of the first conductive piece is electrically connected with the moving contact; the fixed contact is electrically connected with the second wiring end, and the fixed contact and the second wiring end are integrated or separated; the temperature sampling element is positioned on the first conductive member.

4. An intelligent molded case circuit breaker according to claim 1, wherein: the main loop conductor comprises a first wiring end, a first conductive piece, a second conductive piece, a moving contact, a fixed contact and a second wiring end; the first wiring terminal is electrically connected with one end of the first conductive piece, and the first wiring terminal and the first conductive piece are integrated or split pieces; the first conductive piece is electrically connected with the movable contact through the second conductive piece, and the first conductive piece and the second conductive piece are of an integrated structure or a split structure; the second conductive piece is electrically connected with the movable contact through soft connection or hard connection; the fixed contact is electrically connected with the second wiring end, and the fixed contact and the second wiring end are integrated or separated; the temperature sampling element is arranged on the first conductive piece or the second conductive piece and also comprises a backup electromagnetic protector; the backup electromagnetic protector includes an armature disposed about the second conductive member and a yoke.

5. An intelligent molded case circuit breaker according to any of claims 1-4, wherein: the temperature sampling element is one of a platinum resistor, a thermistor and a thermocouple.

6. An intelligent molded case circuit breaker according to claim 1, wherein: the plug-in cooperation comprises a first plug-in unit arranged on the controller and a second plug-in unit arranged on the second circuit board, wherein a group of control pins for controlling the second overload protection component to be started or disabled are arranged in the first plug-in unit and the second plug-in unit, and the control pins of the second plug-in unit are one of the pins of the second control module or are electrically connected with one of the pins of the second control module.

7. An intelligent molded case circuit breaker according to claim 1, wherein: the second circuit board is also provided with a normally closed switch positioned at the electric connection part of the temperature sampling element and the second control module, and the controller is provided with a corresponding driving part; when the controller is not in plug-in fit with the second circuit board, the normally closed switch is in a closed state; after the controller is in plug-in fit with the second circuit board, the driving part drives the normally-closed switch to be in an on-off state, and the electrical connection between the temperature sampling element and the second control module is cut off.

8. An intelligent molded case circuit breaker according to claim 2, wherein: and the main loop conductor is also sleeved with a metering transformer, and the metering transformer is electrically connected with the controller through a second circuit board and is used for sampling current information of the main loop conductor and feeding the current information back to the controller.

9. An intelligent molded case circuit breaker according to claim 2, wherein: the shell also comprises a cover body matched with the base, and the module bin is arranged on the cover body; or, the shell further comprises a cover body arranged on the base and a top cover arranged on the cover body, and the module bin is arranged on the cover body or/and the top cover.

10. An intelligent molded case circuit breaker according to claim 1, wherein: the number of the release is two, one is used for forming a first protection component, and the other is used for forming a second overload protection component.