CN215870764U - Overvoltage suppression module, circuit switching device and electrical equipment - Google Patents
Overvoltage suppression module, circuit switching device and electrical equipment Download PDFInfo
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- CN215870764U CN215870764U CN202122122395.0U CN202122122395U CN215870764U CN 215870764 U CN215870764 U CN 215870764U CN 202122122395 U CN202122122395 U CN 202122122395U CN 215870764 U CN215870764 U CN 215870764U
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Abstract
The application provides an overvoltage suppression module, a circuit switching device and electrical equipment. The overvoltage suppression module is applied to a circuit breaker and specifically comprises a controllable switch and a voltage-controlled impedance unit. In the overvoltage suppression module, when the breaker is closed, the controllable switch is switched on, and when the breaker is switched off, the voltage at two ends of the breaker is greater than the threshold voltage, so that the impedance of the voltage-controlled impedance unit is reduced, namely the voltage-controlled impedance unit is switched on, and most of current flows from the voltage-controlled impedance unit, namely overvoltage at two ends of the breaker is suppressed by discharging the current; after the circuit breaker is switched off, the voltage at two ends is gradually reduced when the circuit breaker is switched off through the leakage current, the circuit breaker is not influenced any more, the controllable switch is switched off, and the energy consumption of the overvoltage suppression module is reduced because the current flowing through the overvoltage suppression module is reduced; in conclusion, the overvoltage suppression module provided by the application is applied to the circuit breaker, so that overvoltage at two ends of the circuit breaker can be suppressed, and energy consumption of the circuit breaker can be reduced.
Description
Technical Field
The utility model relates to the technical field of power electronics, in particular to an overvoltage suppression module, a circuit switching device and electrical equipment.
Background
Under normal operating conditions, the process of breaking the circuit breaker is as follows: the power of the preceding stage power device of the circuit breaker is reduced to zero, then the wave is sealed to enable the preceding stage power device to be safely stopped, and finally the circuit breaker is disconnected.
When a front-stage power device has a fault, for example, when the front-stage power device has a short circuit, the circuit breaker can be instantly disconnected, and because the current flowing through the circuit is increased at the moment, larger overvoltage can be generated, so that the service life of the circuit breaker is influenced; at present, in the prior art, overvoltage can be suppressed, but the energy consumption of the prior art is large.
Therefore, how to suppress the overvoltage at the two ends of the circuit breaker and reduce the energy consumption is a technical problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an overvoltage suppression module, a circuit switching device and an electrical device, which can suppress overvoltage at two ends of a circuit breaker and reduce energy consumption.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the first aspect of the present application provides an overvoltage suppression module applied to a circuit breaker, the overvoltage suppression module including: a controllable switch and a voltage controlled impedance unit; wherein:
one end of the controllable switch is connected with one end of the voltage-controlled impedance unit, the other end of the controllable switch is used as one end of the overvoltage suppression module, and the other end of the voltage-controlled impedance unit is used as the other end of the overvoltage suppression module;
the controllable switch is used for being switched on after the circuit breaker is closed and being switched off after the circuit breaker is switched off.
Optionally, the voltage-controlled impedance unit includes: at least one metal oxide varistor MOV, and/or at least one transient voltage suppressor TVS; wherein:
when only the MOVs or the TVSs are included, if the number of the MOVs is more than or equal to 2 or the number of the TVSs is more than or equal to 2, then all the MOVs are connected in series and parallel, or all the TVSs are connected in series and parallel;
when both the MOV and the TVS are included, each MOV and each TVS are connected in series-parallel.
Optionally, the controllable switch is at least one of a controllable switch tube, a relay or a contactor.
This application second aspect provides a circuit switching device, includes: a circuit breaker and at least one overvoltage suppression module as described in any one of the first aspects of the present application; wherein:
and one overvoltage suppression module is arranged between two ends of each main contact in the circuit breaker.
Optionally, when the number of the main contacts in the circuit breaker is greater than 1, the circuit switching device further includes: at least one other said overvoltage suppression module; wherein:
any two of the main contacts are in a pair, one of the overvoltage suppression modules is arranged between the first ends of at least one pair of the main contacts, and/or,
one said overvoltage suppression module is disposed between the second ends of at least one pair of said primary contacts.
A third aspect of the present application provides a circuit switching device, comprising: a circuit breaker and at least one overvoltage suppression module as described in any one of the first aspects of the present application; wherein:
the number of main contacts in the circuit breaker is more than 1;
and one overvoltage suppression module is arranged between the first ends of any two main contacts.
Optionally, the method further includes: at least one other said overvoltage suppression module; wherein:
-one said overvoltage suppression module is arranged between two ends of at least one said main contact, and/or,
any two of the main contacts are in a pair, and one of the overvoltage suppression modules is arranged between the second ends of at least one pair of the main contacts.
The present application fourth aspect provides a circuit switching device, including: a circuit breaker and at least one overvoltage suppression module as described in any one of the first aspects of the present application; wherein:
the number of main contacts in the circuit breaker is more than 1;
the first end of at least one main contact is connected to the second end of the main contact through one overvoltage suppression module, and the first ends of the rest main contacts are connected to the first end of the other main contact through one overvoltage suppression module.
Optionally, the method further includes: at least one other said overvoltage suppression module; wherein:
any two of the main contacts are in a pair, and one of the overvoltage suppression modules is arranged between the second ends of at least one pair of the main contacts.
A fifth aspect of the present application provides an electrical apparatus, comprising: at least one circuit switching device according to any one of the second to fourth aspects of the present application; wherein:
the circuit switching device is arranged on any current branch in the electrical equipment.
According to the technical scheme, the utility model provides an overvoltage suppression module, which is applied to a circuit breaker, and the overvoltage suppression module specifically comprises: controllable switches and voltage controlled impedance units. In the overvoltage suppression module, when the circuit breaker is closed, the controllable switch is switched on, and when the circuit breaker is switched off, the voltage at two ends of the circuit breaker is greater than the threshold voltage, so that the impedance of the voltage-controlled impedance unit is reduced, namely the voltage-controlled impedance unit is switched on, and most of current flows from the voltage-controlled impedance unit, namely overvoltage at two ends of the circuit breaker is suppressed by discharging current; after the circuit breaker is switched off, the voltage at two ends is gradually reduced when the circuit breaker is switched off through the leakage current, the circuit breaker is not influenced any more, the controllable switch is switched off, and the energy consumption of the overvoltage suppression module is reduced because the current flowing through the overvoltage suppression module is reduced; in conclusion, the overvoltage suppression module provided by the application is applied to the circuit breaker, so that overvoltage at two ends of the circuit breaker can be suppressed, and energy consumption of the circuit breaker can be reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an overvoltage suppression module 10 according to an embodiment of the present application;
fig. 2 to fig. 8 are schematic diagrams of seven structures of the circuit switching device provided in the present application, respectively;
fig. 9 is a grid-connected schematic diagram of the inverter 100 according to the embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In this application, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the prior art, an MOV (metal Oxide Varistor) is arranged between two ends of each main contact of the circuit breaker, so that overvoltage at two ends of the circuit breaker is suppressed; or, a series branch of an MOV and a FUSE FUSE is arranged between two ends of each main contact of the circuit breaker, so that overvoltage at two ends of the circuit breaker is suppressed; however, the above two methods are large in energy consumption.
In order to suppress the overvoltage at both ends of the circuit breaker, can reduce the energy consumption again, this application provides an overvoltage suppression module, is applied to the circuit breaker, and this overvoltage suppression module's structure is shown as figure 1, specifically includes: a controllable switch Q and a voltage controlled impedance unit 11.
In the overvoltage suppression module, one end of a controllable switch Q is connected to one end of a voltage-controlled impedance unit 11, the other end of the controllable switch Q serves as one end of the overvoltage suppression module, and the other end of the voltage-controlled impedance unit 11 serves as the other end of the overvoltage suppression module.
Optionally, the controllable switch Q is at least one of a controllable switch tube, a relay or a contactor, and in practical applications, including but not limited to the above embodiments, the controllable switch Q is not specifically limited herein, and is within the protection scope of the present application.
In operation, when the circuit breaker is closed, the controllable switch Q is switched on, and when the circuit breaker is switched off, the voltage at the two ends of the circuit breaker is greater than the threshold voltage, so that the impedance of the voltage-controlled impedance unit is reduced, namely the voltage-controlled impedance unit is switched on, and most of current flows from the voltage-controlled impedance unit, namely overvoltage at the two ends of the circuit breaker during disconnection can be inhibited through the bleeder current.
The threshold voltage is determined by the property of the voltage-controlled impedance unit 11, and the threshold voltage can be adjusted by selecting voltage-controlled impedance units 11 of different types and specifications to adapt to different working conditions; it is not specifically limited herein, and may be within the scope of the present application depending on the specific circumstances.
After the circuit breaker is turned off, the voltage at two ends of the overvoltage suppression module is gradually reduced through leakage current, the circuit breaker is not affected any more, the controllable switch Q is turned off, and the energy consumption of the overvoltage suppression module is reduced due to the fact that the current flowing through the overvoltage suppression module is reduced.
In conclusion, the overvoltage suppression module provided by the application is applied to the circuit breaker, so that overvoltage at two ends of the circuit breaker can be suppressed, and energy consumption of the circuit breaker can be reduced.
In another embodiment of the present application, as shown in fig. 1, the voltage-controlled impedance unit 11 includes: at least one MOV; when the number of the MOVs is equal to 1, the MOVs are respectively used as two ends of the voltage-controlled impedance unit 11; when the number of MOVs is greater than or equal to 2, the MOVs are connected in series and parallel.
In another embodiment of the present application, the voltage-controlled impedance unit 11 includes: at least one transient voltage suppressor TVS; when the number of the TVS is equal to 1, the TVS is respectively used as two ends of the voltage-controlled impedance unit 11; when the number of TVSs is more than or equal to 2, the TVSs are connected in series and parallel.
In another embodiment of the present application, the voltage-controlled impedance unit 11 includes: at least one MOV and at least one transient voltage suppressor TVS; specifically, each MOV and each TVS are connected in series-parallel.
The above embodiments are only three embodiments of the voltage-controlled impedance unit 11 in the embodiment of the present application, and in practical applications, including but not limited to the above embodiments, the embodiments are not specifically limited herein, and all of them are within the protection scope of the present application.
Another embodiment of the present application provides a circuit switching device, the structure of which can be seen in fig. 2, specifically including: a circuit breaker 01 (only a three-phase ac circuit breaker is shown as an example in fig. 2) and at least one overvoltage suppression module 10 provided by the above embodiments.
In the circuit switching device, an overvoltage suppression module 10 is provided between both ends of each main contact S in the circuit breaker 01.
In operation, when each main contact S is disconnected, overvoltage is generated at two ends of each main contact S, that is, the voltage at two ends of each overvoltage suppression module 10 is greater than the threshold voltage, and the overvoltage suppression modules 10 are in a pass-through state, so that when each main contact S is disconnected, the two ends of each main contact S are communicated by each overvoltage suppression module 10, and each overvoltage suppression module 10 discharges the first end of each main contact S, so that the potential difference between two ends of each main contact S is reduced, that is, overvoltage at two ends of the circuit breaker 01 is suppressed.
Alternatively, the overvoltage suppression modules 10 may be integrated inside the circuit breaker 01 as shown in fig. 2; the circuit breaker 01 can be independent, and is not particularly limited herein, and may be within the protection scope of the present application as the case may be.
It should be noted that, in this embodiment, the circuit breaker 01 may be a dc circuit breaker, a single-phase ac circuit breaker, or a three-phase ac circuit breaker, as shown in fig. 2, which is not specifically limited herein, and may be determined according to specific circumstances, and all of which are within the protection scope of the present application.
It should be noted that the circuit switching device provided in this embodiment may be installed at any time when being connected to any current branch of the electrical device, without distinguishing the first terminal from the second terminal.
In another embodiment of the present application, referring to fig. 3 or fig. 6, the number of main contacts S in a circuit breaker 01 (only illustrated as a three-phase ac circuit breaker in fig. 3) is greater than 1, and on the basis of the above embodiment, the circuit switching device further includes: at least one further overvoltage suppression module 10; wherein any two main contacts S are a pair, and an overvoltage suppression module 10 is arranged between first ends of at least one pair of main contacts S, and/or an overvoltage suppression module (not shown) is arranged between second ends of at least one pair of main contacts S.
In operation, when each main contact S is disconnected, overvoltage is generated at two ends of each main contact S, that is, the voltage at two ends of each overvoltage suppression module 10 is greater than the threshold voltage, and each overvoltage suppression module 10 is in an on-state, so that when each main contact S is disconnected, each overvoltage suppression module 10 enables two ends of each main contact S to be communicated, and enables a first end of each corresponding main contact S to be communicated and/or a second end of each main contact S to be communicated, and thus each overvoltage suppression module 10 respectively leaks the first end and/or the second end of each main contact S, so that a potential difference between two ends of each main contact S is reduced, that is, overvoltage at two ends when the circuit breaker 01 is disconnected is suppressed.
Optionally, each additional overvoltage suppression module 10 of this embodiment may be integrated inside the circuit breaker 01 as shown in fig. 3; the circuit breaker 01 can be independent, and is not particularly limited herein, and may be within the protection scope of the present application as the case may be.
In this embodiment, the circuit breaker 01 may be a single-phase ac circuit breaker, or may also be a three-phase ac circuit breaker, which is not specifically limited herein and is within the protection scope of the present application as the case may be.
It should be noted that, in this embodiment, if an overvoltage suppression module 10 is disposed between the first ends and the second ends of each pair of main contacts, as shown in fig. 6, the circuit switching device provided in this embodiment may be arbitrarily installed without distinguishing the first ends from the second ends when being connected to any current branch of the electrical equipment.
Another embodiment of the present application provides another circuit switching device, and a specific structure of the circuit switching device can be seen in fig. 4, which specifically includes: a circuit breaker 01 (only a three-phase ac circuit breaker is shown as an example in fig. 4) and at least one overvoltage suppression module 10 provided by the above embodiments.
In the circuit switching device, the number of main contacts S in a circuit breaker 01 is more than 1; an overvoltage suppression module 10 is provided between the first ends of any two main contacts S.
In operation, when each main contact S is opened, overvoltage is generated at two ends of each main contact S, that is, the voltage at two ends of each overvoltage suppression module 10 is greater than the threshold voltage, and each overvoltage suppression module 10 is in an on-state, so that when each main contact S is opened, each overvoltage suppression module 10 enables the first ends of each pair of main contacts S to be connected, each overvoltage suppression module 10 respectively drains the first ends of each main contact S, and further the potential difference between two ends of each main contact S is reduced, that is, overvoltage at two ends when the circuit breaker 01 is opened is suppressed.
Alternatively, the overvoltage suppression modules 10 may be integrated inside the circuit breaker 01 as shown in fig. 4; the circuit breaker 01 can be independent, and is not particularly limited herein, and may be within the protection scope of the present application as the case may be.
In this embodiment, the circuit breaker 01 may be a single-phase ac circuit breaker, or may also be a three-phase ac circuit breaker, which is not specifically limited herein and is within the protection scope of the present application as the case may be.
In another embodiment of the present application, referring to fig. 5 (only one overvoltage suppression module 10 is disposed between two ends of one main contact in fig. 5) or fig. 6 (only one overvoltage suppression module 10 is disposed between two ends of three main contacts respectively and one overvoltage suppression module 10 is disposed between the second ends of each pair of main contacts S in fig. 6), on the basis of the above embodiment, the circuit switching device further includes: at least one further overvoltage suppression module 10; wherein, an overvoltage suppression module 10 is arranged between two ends of at least one main contact S, and/or any two main contacts S are a pair, and an overvoltage suppression module 10 is arranged between the second ends of at least one pair of main contacts S.
In operation, when each main contact S is opened, overvoltage is generated at two ends of each main contact S, that is, the voltage at two ends of each overvoltage suppression module 10 is greater than the threshold voltage, and each overvoltage suppression module 10 is in an on-state, so that when each main contact S is opened, each overvoltage suppression module 10 makes the first ends of each pair of main contacts S connected, and makes two ends of each main contact S connected and/or makes the second ends of the corresponding pair of main contacts S connected, so that each overvoltage suppression module 10 respectively drains the first ends of each main contact S, and further reduces the potential difference between two ends of each main contact S, that is, suppresses overvoltage at two ends when the circuit breaker 01 is opened.
Optionally, each additional overvoltage suppression module 10 of this embodiment may be integrated inside the circuit breaker 01 as shown in fig. 5; the circuit breaker 01 can be independent, and is not particularly limited herein, and may be within the protection scope of the present application as the case may be.
In this embodiment, the circuit breaker 01 may be a single-phase ac circuit breaker, or may also be a three-phase ac circuit breaker, which is not specifically limited herein and is within the protection scope of the present application as the case may be.
It should be noted that, in this embodiment, if an overvoltage suppression module 10 is disposed between the first ends and the second ends of each pair of main contacts, as shown in fig. 6, the circuit switching device provided in this embodiment may be arbitrarily installed without distinguishing the first ends from the second ends when being connected to any current branch of the electrical equipment.
Another embodiment of the present application provides another circuit switching device, and a specific structure thereof may refer to fig. 7, which specifically includes: a circuit breaker 01 (only a three-phase ac circuit breaker is shown as an example in fig. 7) and at least one overvoltage suppression module 10 provided by the above embodiments.
In the circuit switching device, the number of the main contacts S in the circuit breaker 01 is greater than 1, the first end of at least one main contact S is connected to the second end of the main contact S through an overvoltage suppression module 10, and the first ends of the other main contacts S are connected to the first end of the other main contact S through an overvoltage suppression module 10.
In operation, when each main contact S is disconnected, overvoltage is generated at two ends of each main contact S, that is, the voltage at two ends of each overvoltage suppression module 10 is greater than the threshold voltage, and each overvoltage suppression module 10 is in an on-state, so that when each main contact S is disconnected, part of the overvoltage suppression modules 10 enable the corresponding first ends of the main contacts S to be communicated, and part of the overvoltage suppression modules 10 enable two ends of the corresponding main contacts S to be communicated, so that each overvoltage suppression module 10 respectively drains the first ends of the main contacts S, and further potential difference between two ends of each main contact S is reduced, that is, overvoltage at two ends when the circuit breaker 01 is disconnected is suppressed.
Alternatively, the overvoltage suppression modules 10 may be integrated inside the circuit breaker 01 as shown in fig. 7; the circuit breaker 01 can be independent, and is not particularly limited herein, and may be within the protection scope of the present application as the case may be.
In this embodiment, the circuit breaker 01 may be a single-phase ac circuit breaker, or may also be a three-phase ac circuit breaker, which is not specifically limited herein and is within the protection scope of the present application as the case may be.
It should be noted that, in this embodiment, if only one overvoltage suppression module 10 is disposed at both ends of each main contact S, the circuit switching device provided in this embodiment is not used for distinguishing the first end from the second end when being connected to any current branch of the electrical equipment, and can be installed arbitrarily.
In another embodiment of the present application, referring to fig. 8 (only one overvoltage suppression module 10 is disposed between the second ends of three pairs of main contacts in fig. 8), on the basis of the above embodiment, the circuit switching device further includes: at least one further overvoltage suppression module 10; any two main contacts S are a pair, and an overvoltage suppression module 10 is arranged between the second ends of at least one pair of main contacts S.
Optionally, each additional overvoltage suppression module 10 of this embodiment may be integrated inside the circuit breaker 01 as shown in fig. 8; the circuit breaker 01 can be independent, and is not particularly limited herein, and may be within the protection scope of the present application as the case may be.
It should be noted that the working principle of the overvoltage suppression module 10 disposed between the second ends of the pair of main contacts S is the same as that of the overvoltage suppression module 10 disposed between the first ends of the pair of main contacts S in the above embodiment, and details are not repeated here.
It should be noted that, in this embodiment, if one overvoltage suppression module 10 is disposed between the first ends and the second ends of each pair of main contacts, the circuit switching device provided in this embodiment may be arbitrarily installed without distinguishing the first ends from the second ends when being connected to any current branch of the electrical equipment.
Another embodiment of the present application provides an electrical device, which specifically includes: at least one circuit switching device 110 is provided as in the previous embodiments, and the circuit switching device 110 is disposed in any current branch of the electrical equipment.
When the electrical device is an inverter 100 and the structure diagram of the circuit switching device 110 is shown in fig. 2, that is, when the overvoltage suppression module 10 is disposed between two ends of each main contact S, as shown in fig. 9, a first end of each main contact S is used as a first end of the circuit switching device 110 and is connected to an ac side of an inverter unit 120 in the inverter 100 through a filter unit 130 in the inverter 100, and a second end of each main contact S is used as a second end of the circuit switching device 110 and is connected to the grid 200 or a rear-stage load.
It should be noted that, in the circuit switching device 110, when the overvoltage suppression module 10 is disposed between the first ends of each pair of main contacts S, and the overvoltage suppression module 10 is also disposed between the second ends of each pair of main contacts S, the two ends of the circuit switching device 110 can be used interchangeably without being distinguished; when only one overvoltage suppression module 10 is arranged at each of the two ends of each main contact S, the two ends of the circuit switching device 110 can be used interchangeably without being distinguished; otherwise, the setting is required according to the requirement.
In practical applications, the electrical device may also be other power devices, which are not specifically limited herein and may be determined according to specific situations, but it is noted that an appropriate circuit switching device 110 is selected according to the type of the power device.
In the above description of the disclosed embodiments, features described in various embodiments in this specification can be substituted for or combined with each other to enable those skilled in the art to make or use the present application. The foregoing is merely a preferred embodiment of the utility model and is not intended to limit the utility model in any manner. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (10)
1. An overvoltage suppression module for use with a circuit breaker, the overvoltage suppression module comprising: a controllable switch and a voltage controlled impedance unit; wherein:
one end of the controllable switch is connected with one end of the voltage-controlled impedance unit, the other end of the controllable switch is used as one end of the overvoltage suppression module, and the other end of the voltage-controlled impedance unit is used as the other end of the overvoltage suppression module;
the controllable switch is used for being switched on after the circuit breaker is closed and being switched off after the circuit breaker is switched off.
2. The overvoltage suppression module of claim 1, wherein the voltage controlled impedance unit comprises: at least one metal oxide varistor MOV, and/or at least one transient voltage suppressor TVS; wherein:
when only the MOVs or the TVSs are included, if the number of the MOVs is more than or equal to 2 or the number of the TVSs is more than or equal to 2, then all the MOVs are connected in series and parallel, or all the TVSs are connected in series and parallel;
when both the MOV and the TVS are included, each MOV and each TVS are connected in series-parallel.
3. The overvoltage suppression module of claim 1, wherein the controllable switch is at least one of a controllable switch tube, a relay, or a contactor.
4. A circuit switching device, comprising: a circuit breaker and at least one overvoltage suppression module as claimed in any one of claims 1 to 3; wherein:
and one overvoltage suppression module is arranged between two ends of each main contact in the circuit breaker.
5. The circuit switching device according to claim 4, wherein when the number of the main contacts in the circuit breaker is greater than 1, the circuit switching device further comprises: at least one other said overvoltage suppression module; wherein:
any two of the main contacts are in a pair, one of the overvoltage suppression modules is arranged between the first ends of at least one pair of the main contacts, and/or,
one said overvoltage suppression module is disposed between the second ends of at least one pair of said primary contacts.
6. A circuit switching device, comprising: a circuit breaker and at least one overvoltage suppression module as claimed in any one of claims 1 to 3; wherein:
the number of main contacts in the circuit breaker is more than 1;
and one overvoltage suppression module is arranged between the first ends of any two main contacts.
7. The circuit switching device of claim 6, further comprising: at least one other said overvoltage suppression module; wherein:
-one said overvoltage suppression module is arranged between two ends of at least one said main contact, and/or,
any two of the main contacts are in a pair, and one of the overvoltage suppression modules is arranged between the second ends of at least one pair of the main contacts.
8. A circuit switching device, comprising: a circuit breaker and at least one overvoltage suppression module as claimed in any one of claims 1 to 3; wherein:
the number of main contacts in the circuit breaker is more than 1;
the first end of at least one main contact is connected to the second end of the main contact through one overvoltage suppression module, and the first ends of the rest main contacts are connected to the first end of the other main contact through one overvoltage suppression module.
9. The circuit switching device according to claim 8, further comprising: at least one other said overvoltage suppression module; wherein:
any two of the main contacts are in a pair, and one of the overvoltage suppression modules is arranged between the second ends of at least one pair of the main contacts.
10. An electrical device, comprising: at least one circuit switching device according to any one of claims 4-9; wherein:
the circuit switching device is arranged on any current branch in the electrical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122122395.0U CN215870764U (en) | 2021-09-03 | 2021-09-03 | Overvoltage suppression module, circuit switching device and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122122395.0U CN215870764U (en) | 2021-09-03 | 2021-09-03 | Overvoltage suppression module, circuit switching device and electrical equipment |
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| CN215870764U true CN215870764U (en) | 2022-02-18 |
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2021
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