CN113496854A - Multi-phase/pole circuit breaker - Google Patents

Abstract

The invention discloses a multiphase/polar circuit breaker, which comprises an insulating shell, and a static contact, a moving contact, an operating mechanism, a current collector, a voltage collector, an electronic controller, a magnetic flux converter, a magnetic release, a carrier communication module, an incoming line wiring terminal and an outgoing line wiring terminal which are arranged in the insulating shell, and is characterized in that: the current collector comprises a Rogowski coil current transformer and a magnetic saturation type iron core current transformer. A Rogowski coil current transformer is arranged in each of two phases/poles or three phases/poles of the circuit breaker, and a magnetic saturation type iron core current transformer is arranged in one phase/pole. The circuit breaker has the functions of current measurement, overload protection, short-circuit short-delay protection, short-circuit instantaneous protection, ground fault protection and the like.

Description

Multi-phase/pole circuit breaker

Technical Field

The invention relates to the field of low-voltage electric appliances, in particular to a multiphase/pole circuit breaker.

Background

With the continuous promotion of national grid in the ubiquitous electric power thing networking plan, each product in the electric power system is constantly transformed and upgraded, adds carrier wave and bluetooth communication module, electronic controller, data display module etc. in the circuit breaker. The normal operation of the individual modules depends on a stable power supply, and it is also specified in the corresponding national standards that the electronic control of the low-voltage circuit breaker should have at least one self-generated power supply generated by the energy of the line to be protected in order to obtain a stable output voltage. When an electronic controller in the circuit breaker normally works, the system disturbance problems need to be overcome, such as disturbance caused by power supply load power change, current change caused by starting, shutting down and even faults of electric appliances in a power grid, and the like.

The more interior space that leads to of module is crowded among the circuit breaker, is unfavorable for the reasonable overall arrangement of product inner structure, especially when there are a plurality of voltage collectors and current collector inside the circuit breaker. Based on the above problems, the optimized design of each internal structure of the product is needed, the volume minimization is realized, more internal spaces are provided for upgrading other intelligent functions, and the method is suitable for the trends of electrical appliance intellectualization and Internet of things. Meanwhile, the product design is carried out at a cost acceptable in the market in consideration of the cost.

In addition, the novel circuit breaker needs to realize functions such as current measurement, overload protection, short-circuit short-delay protection, short-circuit instantaneous protection, ground fault protection and the like. Particularly, in the closing state of the circuit breaker, when a sudden power is received, the three-phase short circuit happens, and the combination of the current collector and the voltage collector which is not well designed cannot be sufficient. The current collector, the voltage collector and the like are required to have a metering function and a self-generated power supply function, and the current collector, the voltage collector and the like need to be reasonably designed to realize the functions.

Disclosure of Invention

In order to solve at least one of the above problems, the present invention provides a multi-phase/pole circuit breaker, which comprises the following specific technical solutions:

a multi-phase/pole circuit breaker comprises an insulating shell, and a static contact, a moving contact, an operating mechanism, a current collector, a voltage collector, an electronic controller, a magnetic flux converter, a magnetic release, a carrier communication module, an incoming line connecting terminal and an outgoing line connecting terminal which are arranged in the insulating shell, wherein the current collector comprises a Rogowski coil current transformer and a magnetic saturation type iron core current transformer, the voltage of the voltage collector is collected from at least one phase/pole or at least one phase/pole and an N pole, the carrier communication module is communicated with an external device through at least one phase/pole and the N pole of the incoming line connecting terminal, the two phases/poles or the three phases/poles of the circuit breaker are respectively provided with the Rogowski coil current transformer, the magnetic saturation type iron core current transformer is arranged in one phase/pole, and the Rogowski coil current transformer and the magnetic saturation type iron core current transformer are connected with the phase of the voltage collector When one-phase/pole, two-phase/pole and three-phase/pole short-circuit faults occur in a load circuit of the circuit breaker, the electronic controller can obtain a normal working power supply and current signals and control the magnetic flux converter to act so as to drive the operating mechanism to trip the circuit breaker to realize short-circuit fault current protection.

Preferably, the current collected by the magnetic saturation type iron core current transformer is used as a working power supply for the electronic controller to supply normal, overload or short-circuit current.

Preferably, the current collected by the magnetic saturation type iron core current transformer is a current signal input by the electronic controller.

Preferably, the current collector further comprises a metering current collector with the precision reaching 0.5S level or more, and the metering current collectors are respectively arranged in each phase/pole;

the electronic controller comprises a metering circuit and a metering microprocessor, the metering current collector provides a current signal for the metering circuit, and the metering circuit is connected with the metering microprocessor.

Preferably, the current collector is arranged between the operating mechanism and the outgoing line connecting terminal, or is partially arranged below the operating mechanism.

Preferably, the magnetic release is arranged behind the operating mechanism, and the at least one current collector is arranged at a position laterally adjacent to the magnetic release.

Preferably, the current collector further comprises a metering current collector with the magnetic saturation type single coil precision reaching 0.5S level or more.

Preferably, the magnetic saturation type iron core current transformer is arranged in any phase of each phase of the circuit breaker, the rogowski coil current transformers are arranged in the other phases of the circuit breaker, and the circuit breaker can perform current measurement, overload protection, short-circuit short-time delay protection and short-circuit instantaneous protection.

Preferably, be provided with in any one of the looks of circuit breaker the magnetism saturation type iron core current transformer, and all be provided with luo shi coil current transformer respectively in the looks, the circuit breaker can carry out current measurement, overload protection, short circuit short-term delay protection, short circuit instantaneous protection, earth fault protection.

Preferably, the current measuring range of the magnetic saturation type iron core current transformer covers to approach or exceed 12 times of rated current of the circuit breaker.

Preferably, the magnetic saturation type iron core current transformer meets the requirement of a power module of the electronic controller when the rated current of the circuit breaker is 0.4 times or more.

Preferably, the voltage collector is of an isolation primary side and secondary side type or a resistance voltage dividing type.

Preferably, the electronic controller comprises a bottom electronic circuit and/or a vertical electronic circuit and/or a top electronic circuit, the bottom electronic circuit is arranged at the bottom of the circuit breaker, the vertical electronic circuit is arranged around the current collector, and the top electronic circuit is arranged around the handle of the operating mechanism.

Preferably, the top electronic circuit is in the shape of a mouth, a U, an L, and combinations thereof.

Preferably, the clearance area in the middle of the electronic circuit on the top of the mouth shape is penetrated by a moving handle.

Preferably, at least two U-shaped top electronics openings are oppositely disposed, and at least one second top electronics opening is disposed between and connected to the at least U-shaped top electronics opening.

Preferably, the connections between the bottom electronic circuit and the vertical electronic circuit, between the vertical electronic circuit and the top electronic circuit, and between the second top electronic circuit and the U-shaped top electronic circuit are plug-in or fixed.

Preferably, a switch state quantity monitoring accessory and/or a shunt accessory and/or an undervoltage protection accessory are/is arranged below the top electronic circuit.

Preferably, the bottom electronic circuit and the top electronic circuit are connected by a row (electric) wire.

Preferably, the electronic controller of the circuit breaker is provided with an external signal receiving port for receiving signals except the circuit breaker, and the signals are processed by the electronic controller to generate a calculation result or are directly forwarded to an external device through a carrier communication module.

Preferably, the insulating shell is provided with a human-computer interaction interface such as an operation indication, an alarm indication, a communication indication, a light pulse interface and a liquid crystal display.

Preferably, when the multi-phase/pole circuit breaker is a three-phase/three-pole circuit breaker, the N pole is externally connected to the circuit breaker.

Preferably, the vertical electrical line passes through a channel of the insulating housing, the channel being disposed on the insulating housing.

Preferably, a temperature measuring module and/or an electronic circuit and/or a voltage collector are/is arranged on the bottom electronic circuit.

Preferably, the bottom electronic circuit and/or the vertical electronic circuit and/or the top electronic circuit are connected through signals or power supplies.

Preferably, the electronic controller is provided with a communication module, the communication module CAN adopt wireless communication and/or wired communication mode, the wireless communication includes at least one of communication modes such as 4G, 5G, WIFI, BLE, ZigBee, NB-IoT and LoRa, the wired communication includes at least one of communication modes such as HPLC, PLC, RS485, LAN, CAN, DeviceNet and Profibus, and the communication module is arranged on the top electronic circuit.

Preferably, the electronic controller is provided with a topology identification module, and the topology identification module is arranged on the top electronic circuit.

The rogowski coil current transformer is a toroidal coil uniformly wound on a non-ferromagnetic material. The method has the characteristics of large measurement range, good linearity and low possibility of saturation. The magnetically saturated iron core current transformer has ferromagnetic material as magnetic circuit and coil set on the magnetic circuit, and features that when the primary current is small, the secondary output is greater, but with the gradual increase of the primary current, the magnetic field strength in the magnetic circuit is gradually saturated and the secondary output increases slowly until no further increase. The iron core material is generally selected from electric cold-rolled silicon steel soft magnetic material, permalloy and the like. The metering current collector is formed by winding a secondary coil on a magnetic core uniformly by taking a high-permeability material as the iron core, and is characterized by being capable of accurately measuring in a low current and keeping good linearity in a certain range. The core material is generally selected from ultracrystalline materials. The invention has the following beneficial effects:

the invention provides a multiphase/polar circuit breaker which comprises a fixed contact, a moving contact, an operating mechanism, a current collector, a voltage collector, an electronic controller, a magnetic flux converter, an insulating shell, a magnetic release, a carrier communication module, an incoming line wiring terminal and an outgoing line wiring terminal, wherein the current collector comprises a Rogowski coil current transformer and a magnetic saturation type iron core current transformer. The voltage of the voltage collector is collected from at least one phase/pole or at least one phase/pole and the N pole. The carrier communication module is communicated with an external device through at least one phase/pole and N pole line of the incoming line wiring terminal. A Rogowski coil current transformer is arranged in each of two phases/poles or three phases/poles of the circuit breaker, and a magnetic saturation type iron core current transformer is arranged in one phase/pole. The circuit breaker has the functions of current measurement, overload protection, short-circuit short-delay protection, short-circuit instantaneous protection, ground fault protection and the like.

When normal operating mode, single-phase short circuit, two-phase short circuit, three-phase short circuit, this circuit breaker can guarantee that electronic controller normally works, and then guarantees the realization of circuit breaker function. When the circuit is in single-phase short circuit, if the short circuit occurs in the phase provided with the magnetic saturation type iron core current transformer, the energy generated by the short circuit current at the second time meets the requirement of the power supply module, and the voltages of the other two phases are normal, so that the requirement of the power supply module is further ensured, the electronic controller works normally, and the protection function is normal; if the phases of the magnetic saturation type iron core current transformer are not set, the voltages of the other two phases are normal to ensure the requirements of the power module, so that the electronic controller works normally, and the protection function is normal.

When two phases of the circuit are short-circuited, if the two phases do not occur in the phase of the magnetic saturation type iron core current transformer, the other phase voltage is normal, the requirement of a power supply module is ensured, so that the electronic controller works normally, and the protection function is normal; if the short-circuit current occurs in the phase provided with the magnetic saturation type iron core current transformer, the energy generated by the short-circuit current at the second time meets the requirement of the power supply module, and the voltage of the other phase is normal, so that the requirement of the power supply module is further ensured, the electronic controller works normally, and the protection function is normal.

When three phases are short-circuited, the magnetic saturation type iron core current transformer can enable the energy generated by the short-circuit current at the second time to meet the requirement of a power supply module, so that the electronic controller works normally, and further the protection function is normal. Particularly, when the breaker is in a closing state and a sudden power is on, the three-phase short circuit is just met, and the combination ensures that the protection function is normal on the premise of ensuring minimum element resources and space occupation.

The mutual inductor adopted by the circuit breaker occupies small volume and is low in cost. The Rogowski coil has the advantages of small volume, wide measurement range (the protection range can be extended, larger short-circuit current can be distinguished, and a powerful basis is provided for selective protection), low price (taking a 3P switch as an example, three magnetically saturated iron core current transformers are traditionally arranged, the price is about 60 yuan).

Under any line working condition and fault condition, the circuit breaker can ensure the normal operation of the protection function, and the protection system is simple and reliable. The current collector is preferably a metering current collector provided with a magnetic saturation type iron core current transformer or a magnetic saturation type single coil with the precision reaching 0.5S level or more. The current measuring range of the magnetic saturation type iron core current transformer covers 12 times or more of rated current of the circuit breaker. The magnetic saturation type iron core current transformer meets the requirement of a power module of the electronic controller when the rated current of the circuit breaker is 0.4 times or more.

The design position of the current collector is flexible. The current collector is arranged between the operating mechanism and the wire outlet wiring terminal, and can also be partially arranged below the operating mechanism. The current collector can be flexibly adjusted at the design positions, and different design requirements are met.

Two sets of power supplies (voltage power supply and current self-generating power supply) are designed under normal working conditions, and the two sets of power supplies are mutually backup, so that the reliability of the power supplies can be improved. The basic principle of the current self-generating power supply is that the current output by the magnetic saturation type iron core current transformer charges the energy storage capacitor to generate voltage, and a voltage regulating circuit is further arranged to prevent the voltage from being too high. The small size provides more internal spaces for upgrading other intelligent functions, and the intelligent network system adapts to the trends of electrical appliance intellectualization and Internet of things. The circuit breaker does not change the appearance and the installation size of the circuit breaker, and adapts to and meets the requirements of intelligent transformation and upgrading.

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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a first embodiment of the circuit breaker of the present invention.

Fig. 2 is a schematic diagram of the overall structure of a first embodiment of the circuit breaker according to the present invention.

Fig. 3 is another angle structure diagram of the circuit breaker according to the first embodiment of the present invention.

Fig. 4 is a schematic diagram of the position of a current collector of the first embodiment of the circuit breaker of the present invention.

Fig. 5 is a schematic diagram of the positions of the phases of the current collector in the first embodiment of the circuit breaker of the present invention.

Fig. 6 is a schematic diagram of the position of a carrier communication module of the first embodiment of the circuit breaker of the present invention.

Figure 7 is a schematic bottom electrical diagram of a first embodiment of the circuit breaker of the present invention.

Figure 8 is a schematic vertical electrical diagram of a first embodiment of the circuit breaker of the present invention.

Figure 9 is a schematic top electrical diagram of a first embodiment of the circuit breaker of the present invention.

Figure 10 is a schematic view of the U-shaped top electronics of the first embodiment of the circuit breaker of the present invention.

Fig. 11 is a schematic diagram of the plug-in electronics of the first embodiment of the circuit breaker of the present invention.

Figure 12 is a schematic view of the top sub-line components of a first embodiment of the circuit breaker of the present invention.

Fig. 13 is a schematic diagram of the hot wire and temperature measurement module of the first embodiment of the circuit breaker of the present invention.

Figure 14 is a schematic diagram of the electronic controller of the first embodiment of the circuit breaker of the present invention.

Fig. 15 is a schematic view of an insulating case of the first embodiment of the circuit breaker of the present invention.

Fig. 16 is a schematic diagram of a second embodiment of the circuit breaker of the present invention.

Fig. 17 is a schematic diagram of a circuit breaker according to a third embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, parts without departing from the spirit of the invention.

First embodiment

As shown in fig. 1 to 15, the present embodiment discloses a multi-phase/pole circuit breaker, where the circuit breaker includes a fixed contact 10, a movable contact 11, an operating mechanism 12, a current collector 13, a voltage collector 14, an electronic controller 15, a magnetic flux converter 16, an insulating housing 17, a magnetic release 18, a carrier communication module 19, an incoming line terminal 20, and an outgoing line terminal 21, where the current collector 13 includes a rogowski coil current transformer 13-1 and a magnetically saturated iron core current transformer 13-2. In this embodiment, the current collector 13 specifically includes a rogowski coil current transformer 13-1A disposed in the phase a, a rogowski coil current transformer 13-1B disposed in the phase of the metering current collector 13-3A, B with an accuracy of 0.5S or more, a rogowski coil current transformer 13-1C disposed in the phase of the metering current collector 13-3B, C with an accuracy of 0.5S or more, a metering current collector 13-3C with an accuracy of 0.5S or more, and a magnetically saturated iron core current transformer 13-2. The carrier communication module 19 communicates with an external device through at least one phase/pole and N-pole line of the incoming line terminal 20. The circuit breaker has the functions of current measurement, overload protection, short-circuit short-delay protection, short-circuit instantaneous protection, ground fault protection and the like.

Specifically, the rogowski coil current transformer 13-1 is an annular coil uniformly wound on a non-ferromagnetic material, and has the characteristics of large measurement range, good linearity and low possibility of saturation. The magnetic saturation type iron core current transformer 13-2 is a current transformer which takes a ferromagnetic material as a magnetic circuit and is provided with a coil on the magnetic circuit, and is characterized in that when primary current is small current, larger secondary output is provided, but with the gradual increase of the primary current, the magnetic field intensity in the magnetic circuit is gradually saturated, the secondary output is slowly increased until no more increase, and the iron core material generally adopts an electrical cold-rolled silicon steel soft magnetic material, permalloy and the like.

The current collector 13 further includes a metering current collector 13-3 with an accuracy of 0.5S level or more, and specifically, at least one metering current collector 13-3 is added to each phase/pole. The metering current collector 13-3 is a current collector formed by uniformly winding a secondary coil on a magnetic core by taking a high-permeability material as the iron core, and is characterized by being capable of accurately measuring in a low current and keeping good linearity in a certain range. The core material is generally selected from ultracrystalline materials.

The electronic controller 15 comprises a metering circuit 15-1 and a metering microprocessor 15-2, the metering current collector 13-3 provides a current signal for the metering circuit 15-1, the metering circuit 15-1 is connected with the metering microprocessor 15-2, the current signal provided by the metering current collector 13-3 can be transmitted to the metering microprocessor 15-2, and the metering microprocessor 15-2 processes the signal.

Fig. 2 to 5 are schematic diagrams of an embodiment of a multiphase/pole circuit breaker. The breaker is characterized in that a Rogowski coil current transformer 13-1 is arranged in each of three phases/poles of the breaker, a magnetic saturation type iron core current transformer 13-2 is arranged in one phase/pole, the Rogowski coil current transformer 13-1 is arranged in each of the three phases/poles, and the magnetic saturation type iron core current transformer 13-2 arranged in one phase/pole is combined with a voltage collector 14, so that when a one-phase/pole, two-phase/pole or three-phase/pole short-circuit fault occurs in a load circuit of the breaker, the electronic controller 15 can obtain a normal working power supply and a current signal, and controls the magnetic flux converter 16 to act so as to enable the breaker to drive the operating mechanism 12 to trip to realize short-circuit fault current protection. Two sets of power supplies (voltage power supply and current self-generating power supply) are designed under normal working conditions, and the two sets of power supplies are mutually backup, so that the reliability of the power supplies can be improved. The basic principle of the current self-generating power supply is that the current output by the magnetic saturation type iron core current transformer 13-2 charges the energy storage capacitor to generate voltage, and a voltage regulating circuit is further arranged to prevent the voltage from being too high.

The magnetically saturated core current transformer 13-2 disposed in one phase/pole serves as a working power supply for the electronic controller 15 during normal, overload or short-circuit current. The metering current collector 13-3 provides a current signal for the metering circuit 15-1, and the metering circuit 15-1 is connected with the metering microprocessor 15-2. In the first embodiment, a magnetic saturation type iron core current transformer 13-2 is arranged in one phase (C phase), and Rogowski coil current transformers 13-1 are arranged in all phases, so that the circuit breaker has the functions of current measurement, overload protection, short-circuit short-delay protection, short-circuit instantaneous protection and ground fault protection.

The current measuring range of the magnetic saturation type iron core current transformer 13-2 covers 12 times or more of rated current of the circuit breaker. When the rated current of the circuit breaker is 0.4 times or more than the rated current of the circuit breaker, the magnetically saturated iron core current transformer 13-2 can meet the requirements of a power module 15-3 of the electronic controller 15, namely: when the magnetic saturation type iron core current transformer 13-2 is 0.4 times or more of the rated current of the circuit breaker, the magnetic saturation type iron core current transformer 13-2 can provide a working power supply for the power supply module 15-3. The voltage collector 14 is an isolation primary side and secondary side type or a resistance voltage dividing type.

As shown in fig. 4 and 5, the current collector 13 includes a rogowski coil current transformer 13-1, a magnetically saturated iron core current transformer 13-2, and a metering current collector 13-3 with an accuracy of 0.5S or more. The current collector 13 is disposed between the operating mechanism 12 and the outgoing line connecting terminal 21, as shown in a region a in fig. 4, or may be partially disposed below the operating mechanism 12, as shown in a region B in fig. 4. The current collector 13 is flexible in design position and can be adjusted in these areas.

Fig. 5 is a schematic diagram illustrating positions of phases of a current collector according to an embodiment. A Rogowski coil current transformer 13-1A and a metering current collector 13-3A with the precision reaching 0.5S level or more are arranged in the phase A, a Rogowski coil current transformer 13-1B and a metering current collector 13-3B with the precision reaching 0.5S level or more are arranged in the phase B, and a Rogowski coil current transformer 13-1C, a metering current collector 13-3C with the precision reaching 0.5S level or more and a magnetic saturation type iron core current transformer 13-2 are arranged in the phase C.

The magnetic release 18 is arranged behind the operating mechanism 12, and at least one current collector 13 is arranged at a position laterally adjacent to the magnetic release 18. That is, as shown in fig. 5, in the current flowing direction of the outgoing line terminal 21A, the rogowski coil current transformer 13-1A and the metering current collector 13-3A having an accuracy of 0.5S level or more are laterally adjacent to the magnetic release 18.

Fig. 6 is a schematic diagram illustrating a position of the carrier communication module 19 according to an embodiment. The carrier communication module 19 is located in the cavity at the topmost layer of the insulating housing 17 and on the left side of the operating mechanism 12, and correspondingly, the carrier communication module 19 may also be located on the right side of the operating mechanism 12.

Fig. 7, 8 and 9 are schematic diagrams of electronic circuits in different positions. The electronic controller 15 includes bottom electronics 15p-1 and/or vertical electronics 15p-2 and/or top electronics 15 p-3. The bottom electronic circuit 15p-1 is disposed at the bottom of the circuit breaker, and is shown in fig. 7 as 22, and the vertical electronic circuit 15p-2 is disposed around the current collector 13, and specifically, may be disposed at any position above, below, to the left, or to the right of the current collector 13. The vertical electrical traces 15p-2 pass through channels 17-1 of the insulating housing 17, the channels 17-1 being disposed on the insulating housing 17. The top electronic circuit 15p-3 is disposed around the handle 12-1 of the operating mechanism 12, and specifically, may be disposed at any position above, below, to the left, or to the right of the handle 12-1 of the operating mechanism 12.

The top electronics 15p-3 include a die top electronics 15p-3k, as shown in FIG. 9, which is a schematic view of the die top electronics 15p-3 k. An empty area 15p-3kb in the middle of the electronic top circuit 15p-3k of the mouth shape can be penetrated by the moving handle 12-1.

Preferably, the top electronics 15p-3 includes a U-shaped top electronics 15p-3U, as shown in FIG. 10, which is a schematic view of the U-shaped top electronics 15 p-3U. In this embodiment, the top electronics 15p-3 includes at least two U-shaped top electronics 15p-3U, the at least two U-shaped top electronics 15p-3U being oppositely positioned with at least one second top electronics 15p-32 positioned between and connected to the at least U-shaped top electronics 15 p-3U. Preferably, the shape of the top electronic circuit 15p-3 includes an L shape and a combination of the above shapes, in addition to the above-mentioned forms.

The electronic controller 15 is provided with a topology identification module 15t, and the topology identification module 15t is arranged on the top electronic circuit 15 p-3.

Fig. 11 is a schematic diagram of the plug-in structure of the bottom electronic circuit 15p-1 and the vertical electronic circuit 15 p-2. The connections between the bottom electronic circuit 15p-1 and the vertical electronic circuit 15p-2, between the vertical electronic circuit 15p-2 and the top electronic circuit 15p-3, and between the second top electronic circuit 15p-32 and the U-shaped top electronic circuit 15p-3U may be plug-in or fixed.

Fig. 12 is a schematic diagram of the components below the top electronics 15 p-3. A switch state quantity monitoring accessory 23 and/or a shunt accessory 24 and/or an under-voltage protection accessory 25 are arranged below the top electronic circuit 15p-3, the switch state quantity monitoring accessory 23, the shunt accessory 24 and the under-voltage protection accessory 25 can be arranged simultaneously or separately, and the switch state quantity monitoring accessory 23 is used for monitoring the on-off state of a switch and the like and providing support for remote monitoring control. The shunt accessory 24 is used for the opening operation of the circuit breaker and comprises a shunt release and the like. The undervoltage protection accessory 25 is used for undervoltage protection of a circuit breaker, and some electric appliances are released due to too low voltage, so that a control circuit works abnormally, and accidents can be caused.

Fig. 13 is a schematic diagram of the row (electrical) wires 26 and the thermometry module 27. The bottom electronic circuit 15p-1 and the top electronic circuit 15p-3 are connected by a bus 26. The bottom electronic circuit 15p-1 is provided with a temperature measuring module 27, and the temperature measuring module 27 is used for measuring the internal temperature of the circuit breaker and can perform corresponding operation processing when the internal temperature of the circuit breaker is too high.

Signal or power connections are made between the bottom electronics 15p-1 and/or the vertical electronics 15p-2 and/or the top electronics 15 p-3.

Fig. 14 is a schematic diagram of the electronic controller 15. The electronic controller 15 of the circuit breaker is provided with an external signal receiving port 15-5 for receiving signals except the circuit breaker, and the signals are processed by the electronic controller 15 to generate a calculation result or are directly forwarded to an external device through the carrier communication module 19. When the multi-phase/pole circuit breaker is a three-phase/three-pole circuit breaker, the N pole is connected into the circuit breaker from the outside.

The electronic circuit 15p-1 and/or the voltage collector 14 are/is arranged on the bottom electronic circuit 15 p-1. The voltage collector 14 is combined with the rogowski coil current transformer 13-1 and the magnetic saturation type iron core current transformer 13-2, and when a load line of the circuit breaker has a one-phase/pole, two-phase/pole and three-phase/pole short-circuit fault, the electronic controller 15 can obtain a normal working power supply and a current signal, and controls the magnetic flux converter 16 to act so as to drive the operating mechanism 12 to trip the circuit breaker to realize short-circuit fault current protection. The electronic circuit 15p-1x is used for connecting the temperature measuring module 27, the metering microprocessor 15-2, the power supply module 15-3 and the like.

The electronic controller 15 is provided with a communication module, and adopts wireless communication and/or wired communication mode, the wireless communication comprises at least one of communication modes such as 4G, 5G, WIFI, BLE, ZigBee, NB-IoT and LoRa, and the wired communication comprises at least one of communication modes such as HPLC, PLC, RS485, LAN, CAN, DeviceNet and Profibus. The communication module is preferably disposed on the top electronics 15 p-3.

Fig. 15 is a schematic view of the insulating housing 17. And a human-computer interaction interface such as an operation indication and/or an alarm indication and/or a communication indication and/or a light pulse interface and/or a liquid crystal display is arranged on the insulating shell 17.

Second embodiment

Fig. 16 is a schematic diagram of a second embodiment of a multi-phase/pole circuit breaker. The present embodiment discloses another form of multi-phase/pole circuit breaker, which is the same as the first embodiment, and the circuit breaker includes a static contact 10, a moving contact 11, an operating mechanism 12, a current collector 13, a voltage collector 14, an electronic controller 15, a magnetic flux converter 16, an insulating housing 17, a magnetic release 18, a carrier communication module 19, an incoming line terminal 20 and an outgoing line terminal 21, where the current collector 13 includes a rogowski coil current transformer 13-1 and a magnetically saturated iron core current transformer 13-2, and the voltage of the voltage collector 14 is derived from at least one phase/pole or at least one phase/pole and an N pole. The carrier communication module 19 communicates with an external device through at least one phase/pole and N-pole line of the incoming line terminal 20. The circuit breaker has the functions of current measurement, overload protection, short-circuit short-time delay protection, short-circuit instantaneous protection and the like.

Different from the first embodiment, in the present embodiment, a rogowski coil current transformer 13-1 is respectively arranged in two phases/poles of the circuit breaker, a magnetic saturation type iron core current transformer 13-2 is arranged in one phase/pole, the rogowski coil current transformer 13-1 is respectively arranged in each two phases/poles, and the magnetic saturation type iron core current transformer 13-2 arranged in one phase/pole is combined with a voltage collector 14, when a one-phase/pole, two-phase/pole, and three-phase/pole short-circuit fault occurs in a load line of the circuit breaker, the electronic controller 15 can obtain a normal working power supply and a current signal, and control the magnetic flux converter 16 to operate, so that the circuit breaker driving operation mechanism 12 trips to realize short-circuit fault current protection.

Unlike the first embodiment, the current collected by the magnetically saturable core current transformer 13-2 disposed in one phase/pole in this embodiment provides the electronic controller 15 with a working power supply during normal, overload or short-circuit current on the one hand, and also serves as a current signal input by the electronic controller 15. The magnetic saturation type iron core current transformer 13-2 has the functions of a current self-generating power supply and current measurement at the same time.

The intelligent power supply system has the advantages of being small in occupied size, providing more internal space for upgrading other intelligent functions, and adapting to the trends of electrical appliance intellectualization and Internet of things. The number of the current collectors 13 is only 3, so that the occupied space inside the circuit breaker is reduced, the cost is low, and the overall cost of the circuit breaker is saved by adopting a smaller number of the current collectors 13.

Third embodiment

Fig. 17 is a schematic diagram of a multiphase/pole circuit breaker according to an embodiment. The present embodiment discloses another form of multiphase/polar circuit breaker, which is the same as the first embodiment, and includes a static contact 10, a moving contact 11, an operating mechanism 12, a current collector 13, a voltage collector 14, an electronic controller 15, a magnetic flux converter 16, an insulating housing 17, a magnetic release 18, a carrier communication module 19, an incoming line terminal 20, and an outgoing line terminal 21, where the current collector 13 includes a rogowski coil current transformer 13-1 and a magnetic saturation type iron core current transformer 13-2. The voltage of the voltage collector 14 is collected from at least one phase/pole or at least one phase/pole and the N pole. The carrier communication module 19 communicates with an external device through at least one phase/pole and N-pole line of the incoming line connection terminal 20. The circuit breaker has the functions of current measurement, overload protection, short-circuit short-delay protection, short-circuit instantaneous protection, ground fault protection and the like.

In this embodiment, the current collector 13 further includes a metering current collector 13-3 with an accuracy of 0.5S or more, and at least one metering current collector 13-3 is added to each phase/pole. The electronic controller 15 comprises a metering circuit 15-1 and a metering microprocessor 15-2, the metering current collector 13-3 provides a current signal for the metering circuit 15-1, and the metering circuit 15-1 is connected with the metering microprocessor 15-2.

Different from the first embodiment, in the present embodiment, a rogowski coil current transformer 13-1 is respectively arranged in two phases/poles of the circuit breaker, a magnetic saturation type iron core current transformer 13-2 is arranged in one phase/pole, the rogowski coil current transformer 13-1 arranged in the two phases/poles and the magnetic saturation type iron core current transformer 13-2 arranged in the one phase/pole are combined with a voltage collector 14, and when a one-phase/pole, two-phase/pole and three-phase/pole short-circuit fault occurs in a load line of the circuit breaker, the electronic controller 15 can obtain a normal working power supply and a current signal, and control the magnetic flux converter 16 to operate, so that the circuit breaker driving operation mechanism 12 trips to realize short-circuit fault current protection. Unlike the first embodiment, the current collected by the magnetically saturated core current transformer 13-2 disposed in one phase/pole in this embodiment is used as a current signal input by the electronic controller 15 while providing the electronic controller 15 with a working power supply during normal, overload or short-circuit current, and the magnetically saturated core current transformer 13-2 has functions of current self-generating power supply and current measurement.

The advantage of this embodiment is that, on the premise of retaining the metering function, the number of the current collectors 13 used in the third embodiment is smaller, so that the internal space of the circuit breaker is saved, more internal spaces are provided for upgrading other intelligent functions, and the trend of electrical appliance intellectualization and internet of things is adapted. Meanwhile, the cost of the product is also reduced.

Preferably, various combinations of the above solutions are also included within the scope of the patent claims, such as: a Rogowski coil current transformer 13-1 is arranged in each of three phases/poles of the circuit breaker, a magnetic saturation type iron core current transformer 13-2 is arranged in one phase/pole, and a metering current collector 13-3 with the precision reaching 0.5S level or more is not used. The magnetic saturation type iron core current transformer 13-2 is used as a working power supply of the electronic controller 15 in normal, overload or short-circuit current, and the magnetic saturation type iron core current transformer 13-2 is only used as a current self-generating power supply.

The above are only some embodiments of the present invention, and those skilled in the art can make various changes or modifications to the embodiments of the present invention according to the disclosure of the application document without departing from the spirit and scope of the present invention.

Claims (27)

1. A multi-phase/pole circuit breaker comprises an insulating shell (17), a static contact (10), a moving contact (11), an operating mechanism (12), a current collector (13), a voltage collector (14), an electronic controller (15), a magnetic flux converter (16), a magnetic tripper (18), a carrier communication module (19), an incoming line connecting terminal (20) and an outgoing line connecting terminal (21), wherein the static contact (10), the moving contact (11), the operating mechanism (12), the current collector (13), the voltage collector (14), the electronic controller (15), the magnetic flux converter (16), the magnetic tripper (18), the carrier communication module (19), the incoming line connecting terminal (21), the current collector (13) comprises a Rogowski coil current transformer (13-1) and a magnetic saturation type iron core current transformer (13-2), the voltage of the voltage collector (14) is acquired from at least one phase/pole or at least one phase/pole and an N pole, the carrier communication module (19) is communicated with an external device through at least one phase/pole and the N pole of the incoming line connecting terminal (20), a Rogowski coil current transformer (13-1) is respectively arranged in two phases/poles or three phases/poles of the circuit breaker, and a magnetic saturation type iron core current transformer (13-2) is arranged in one phase/pole, and the circuit breaker is characterized in that: the Rogowski coil current transformer (13-1) and the magnetic saturation type iron core current transformer (13-2) are combined with the voltage collector (14), when a load circuit of the circuit breaker has one-phase/pole, two-phase/pole and three-phase/pole short-circuit faults, the electronic controller (15) can obtain a normal working power supply and current signals, and controls the magnetic flux converter (16) to act so as to drive the operating mechanism (12) to trip the circuit breaker to realize short-circuit fault current protection.

2. A multiphase/pole circuit breaker according to claim 1, characterized in that: the current collected by the magnetic saturation type iron core current transformer (13-2) provides a working power supply for the electronic controller (15) during normal, overload or short-circuit current.

3. A multiphase/pole circuit breaker according to claim 2, characterized in that: the current collected by the magnetic saturation type iron core current transformer (13-2) is a current signal input by the electronic controller (15).

4. A multiphase/pole circuit breaker according to claim 1, characterized in that: the current collector (13) also comprises a metering current collector (13-3) with the precision reaching 0.5S level or more, and the metering current collectors (13-3) are respectively arranged in each phase/pole;

the electronic controller (15) comprises a metering circuit (15-1) and a metering microprocessor (15-2), the metering current collector (13-3) provides a current signal for the metering circuit (15-1), and the metering circuit (15-1) is connected with the metering microprocessor (15-2).

5. A multiphase/pole circuit breaker according to any of claims 1-4, characterized in that: the current collector (13) is arranged between the operating mechanism (12) and the outgoing line wiring terminal (21), or is partially arranged below the operating mechanism (12).

6. A multiphase/pole circuit breaker according to claim 1, characterized in that: the magnetic release (18) is arranged behind the operating mechanism (12), and the at least one current collector (13) is arranged at a position transversely adjacent to the magnetic release (18).

7. A multiphase/pole circuit breaker according to claim 1, characterized in that: the current collector (13) also comprises a metering current collector (13-3) with the magnetic saturation type single coil precision reaching 0.5S level and above.

8. A multiphase/pole circuit breaker according to claim 3, characterized in that: the magnetic saturation type iron core current transformer (13-2) is arranged in any phase of each phase of the circuit breaker, the Rogowski coil current transformer (13-1) is arranged in the other phases of the circuit breaker, and the circuit breaker can carry out current measurement, overload protection, short-circuit short-time delay protection and short-circuit instantaneous protection.

9. A multiphase/pole circuit breaker according to claim 2, characterized in that: the magnetic saturation type iron core current transformer (13-2) is arranged in any phase of each phase of the circuit breaker, the Rogowski coil current transformers (13-1) are respectively arranged in all the phases of the circuit breaker, and the circuit breaker can carry out current measurement, overload protection, short-circuit short-time delay protection, short-circuit instantaneous protection and ground fault protection.

10. A multiphase/pole circuit breaker according to claim 1, characterized in that: the current measuring range of the magnetic saturation type iron core current transformer (13-2) covers 12 times of the rated current of the circuit breaker or more.

11. A multiphase/pole circuit breaker according to claim 1, characterized in that: the magnetic saturation type iron core current transformer (13-2) meets the requirements of a power module (15-3) of the electronic controller (15) when the rated current of the circuit breaker is 0.4 times or more.

12. A multiphase/pole circuit breaker according to claim 1, characterized in that: the voltage collector (14) is of an isolation primary side and secondary side type or a resistance voltage dividing type.

13. A multiphase/pole circuit breaker according to claim 1, characterized in that: the electronic controller (15) comprises a bottom electronic circuit (15p-1) and/or a vertical electronic circuit (15p-2) and/or a top electronic circuit (15p-3),

the bottom electronic circuit (15p-1) is arranged at the bottom (22) of the circuit breaker,

the electronic circuit (15p-2) is arranged around the current collector 13,

the top electronic circuit (15p-3) is disposed around a handle (12-1) of the operating mechanism (12).

14. A multiphase/pole circuit breaker according to claim 1, characterized in that: the top electronics (15p-3) are in the shape of a mouth (15p-3k), U (15p-3U), L (15p-31) and combinations thereof.

15. A multiphase/pole circuit breaker according to claim 14, characterized in that: the clearance area (15p-3kb) in the middle of the electronic circuit (15p-3k) at the top of the mouth shape is penetrated by a moving handle (12-1).

16. A multiphase/pole circuit breaker according to claim 14, characterized in that: at least two U-shaped top electronics (15p-3U) are arranged with the openings facing each other, and at least one second top electronics (15p-32) is arranged between the openings and connected to the at least U-shaped top electronics (15 p-3U).

17. A multiphase/pole circuit breaker according to claim 14, characterized in that: the connection between the bottom electronic circuit (15p-1) and the vertical electronic circuit (15p-2), between the vertical electronic circuit (15p-2) and the top electronic circuit (15p-3), and between the second top electronic circuit (15p-32) and the U-shaped top electronic circuit (15p-3U) is plug-in or fixed.

18. A multiphase/pole circuit breaker according to claim 13, characterized in that: and a switch state quantity monitoring accessory (23) and/or a shunt accessory (24) and/or an undervoltage protection accessory (25) are/is arranged below the top electronic circuit (15 p-3).

19. A multiphase/pole circuit breaker according to claim 13, characterized in that: the bottom electronic circuit (15p-1) and the top electronic circuit (15p-3) are connected by a row (electric) wire (26).

20. A multiphase/pole circuit breaker according to claim 1, characterized in that: the electronic controller (15) of the circuit breaker is provided with an external signal receiving port (15-5) for receiving signals except the circuit breaker, and the signals are processed by the electronic controller (15) to generate a calculation result or are directly forwarded to an external device through the carrier communication module (19).

21. A multiphase/pole circuit breaker according to claim 1, characterized in that: and a man-machine interaction interface such as an operation indication and/or an alarm indication and/or a communication indication and/or a light pulse interface and/or a liquid crystal display is arranged on the insulating shell (17).

22. A multiphase/pole circuit breaker according to claim 1, characterized in that: when the multiphase/pole circuit breaker is a three-phase/three-pole circuit breaker, the N pole is connected into the circuit breaker from the outside.

23. A multiphase/pole circuit breaker according to claim 13, characterized in that: the vertical electrical line (15p-2) passes through a channel (17-1) of the insulating housing (17), the channel (17-1) being disposed on the insulating housing (17).

24. A multiphase/pole circuit breaker according to claim 13, characterized in that: and a temperature measuring module (27) and/or an electronic circuit (15p-1x) and/or a voltage collector (14) are/is arranged on the bottom electronic circuit (15 p-1).

25. A multiphase/pole circuit breaker according to claim 13, characterized in that: signal or power connections are made between the bottom electronic circuit (15p-1) and/or the vertical electronic circuit (15p-2) and/or the top electronic circuit (15 p-3).

26. A multiphase/pole circuit breaker according to claim 13, characterized in that: the electronic controller (15) is provided with a communication module, the communication module CAN adopt wireless communication and/or wired communication modes, the wireless communication comprises at least one of communication modes such as 4G, 5G, WIFI, BLE, ZigBee, NB-IoT and LoRa, the wired communication comprises at least one of communication modes such as HPLC, PLC, RS485, LAN, CAN, DeviceNet and Profibus, and the communication module is arranged on the top electronic circuit (15 p-3).

27. A multiphase/pole circuit breaker according to claim 13, characterized in that: the electronic controller (15) is provided with a topology recognition module (15t), and the topology recognition module (15t) is arranged on the top electronic circuit (15 p-3).

Images