• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Circuit protection device and circuit protection set that includes it. The invention discloses a circuit protection device and a circuit protection assembly including it. The circuit protection device includes a mechanism assembly configured to disconnect a load and the current protection device from a main line; a mains frequency surge drive assembly that acts to drive the mechanism assembly when a mains frequency voltage is overloaded; a circuit board connected to the main line and to ground, and configured to control the mains frequency surge drive assembly to act when the mains frequency voltage is overloaded; a set of contacts including a first state and a second state, under a normal working voltage the contact set is in the first state in which it provides an effective power supply to the circuit board, and when the frequency voltage of the network is overloaded and the drive assembly of the network frequency overvoltage acts to drive the mechanism assembly, the set of contacts is in the second state; and a transient current protection means connected to the circuit board and performing overvoltage protection in a transient current condition. The invention simultaneously realizes the protection against transient currents and the protection against network frequency overvoltages and can realize the overvoltage protection of the transient current protection means, extend the service life of the transient current protection means, and effectively protect the equipment. and staff safety. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2806826A2
    申请号:ES202030594
    申请日:2020-06-18
    公开日:2021-02-18
    发明作者:Wenwen Chen；Simon Tian；Zifang Mao；Xuemei Deng；Zhangji Zhou
    申请人:Schneider Electric Industries SAS；
    IPC主号:
    专利说明:

    [0002] Circuit protection device and circuit protection kit including it
    [0004] Technical field
    [0006] The invention relates to a circuit protection device, and more particularly, to a circuit protection device with a function of protection against network frequency overvoltages and a function of protection against transient current overvoltages. The invention also relates to a circuit protection assembly including the circuit protection device.
    [0008] Background
    [0010] At present, there is a growing demand in the market for circuit protection devices that take into account both network frequency surge protection and transient current surge protection. In the prior art, a network frequency surge protection device and a transient current surge protection device are often implemented as separate modules. For example, to meet the market demand that requires both network frequency surge protection and transient current surge protection, several manufacturers assemble a micro-circuit breaker, a transient current module, and a frequency surge module of the network, all of them in the form of a separate product. This way of assembling the standalone products can satisfy the functional requirements, but it usually takes up a lot of space and is expensive.
    [0012] Therefore, there is a need for an improved circuit protection device and assembly that integrates network frequency surge protection and cost and space saving protection against transient currents.
    [0014] Summary
    [0016] The purpose of the invention is to provide a circuit protection device and assembly that meets the above requirements with protection against network frequency overvoltages and protection against built-in transient currents.
    [0017] In accordance with one aspect of the present invention, a circuit protection device is provided. The circuit protection device includes a housing in which the following are provided:
    [0019] a mechanism assembly configured to disconnect a load and a current protection device from a main line;
    [0021] a mains frequency surge drive assembly that acts to drive the mechanism assembly when a mains frequency voltage is overloaded;
    [0023] a circuit board connected to the main line and to ground and configured to control the mains frequency surge drive assembly to act when the mains frequency voltage is overloaded and to discharge a transient current when a mains voltage is produced transient currents;
    [0025] a contact assembly comprising a first state and a second state, under a normal working voltage, the contact assembly being in the first state in which it provides an effective power supply to the circuit board, and when the voltage of Network frequency is overloaded, and the network frequency overvoltage driving assembly acts to drive the mechanism assembly, the contact assembly is in the second state;
    [0027] characterized because,
    [0029] Also provided in the housing is a transient current protection means connected to the circuit board, the transient current protection means performing overvoltage protection under transient current conditions.
    [0031] Preferably, the contact assembly includes a first static contact, a second static contact, a first moving contact, and a second moving contact, with the first static contact and the first moving contact closing to provide the effective power source to the circuit board when the contact set is in the first state; the network frequency surge drive assembly driving the second moving contact to close with the second static contact in order to disconnect the circuit board from a connection terminal when the contact assembly is in the second state.
    [0032] Preferably, the transient protection means comprises a piezo resistor with a thermal release device, and the piezo resistor is connected in series to a grounded gas discharge tube.
    [0034] Preferably, the housing is a module with a width of 18 mm.
    [0036] Preferably, the thermal release device is integrated with the piezo resistor, and the thermal release device is a thermal fuse or a thermal release mechanism driven by an elastic force.
    [0038] Preferably, the circuit protection device also includes a service life indicating device for the transient current protection means.
    [0040] Preferably, the life indicator device is an electronic indicator light, and when the set of contacts is in the first state, an electronic indicator light driving circuit is driven to be turned on presenting different colors depending on the different states of the device. thermal release of piezo resistance.
    [0042] Preferably, the circuit protection device also includes a grid frequency overvoltage fault indicating device.
    [0044] Preferably, the network frequency overvoltage failure indicating device is a mechanical indicating device, and the network frequency overvoltage failure indicating device is driven by the mechanism assembly and displays a warning color when the drive assembly Grid frequency overvoltage acts with the overloaded grid frequency voltage, the contact set is in the second state, and the mechanism set acts.
    [0046] Preferably, the indicator light is a first light-emitting diode and a second light-emitting diode which are connected through the thermal release device and the piezoresistor in series in opposite directions, and a bridge is connected between the first light-emitting diode. and the second light emitting diode and between the thermal release device and the piezo resistor and is brought to an end of the piezo resistor opposite the thermal release device through a resistor, and therefore when the thermal release device is normal, the first light-emitting diode emits light and the second light-emitting diode is not lit and when the releasing device Thermal is off, the second light emitting diode emits light and the first light emitting diode is not lit.
    [0048] According to another aspect of the invention, a circuit protection assembly is provided, which includes the circuit protection device described above and a main line breaking device cooperating with the circuit protection device.
    [0050] The circuit protection device and the circuit protection assembly of the invention simultaneously perform the protection against transient currents and the protection against frequency overvoltages of the main line network and the protection against frequency overvoltages of the one-branch network. transient currents, greatly reducing the damage to a transient current function module and main line subordinate loads due to network frequency overvoltage, and effectively protect equipment and personnel safety. At the same time, the main line is protected by integrating the network frequency surge protection means and the transient current protection means in one 18mm product, which achieves small size, low cost and good Customer application, it achieves the electronic indication of the service life of the transient current protection means and the indications of the grid frequency overvoltage fault condition and the normal operating condition, and satisfies various customer needs.
    [0052] Brief description of the drawings
    [0054] Fig. 1 is a schematic circuit diagram of an embodiment of the circuit protection device according to the present invention;
    [0056] Fig. 2 is a schematic circuit diagram of the protection means of a transient current embodiment of a circuit protection device according to the present invention;
    [0058] Fig. 3 is a front view of an embodiment of the circuit protection device according to the present invention, of which the side portion of the housing is open;
    [0060] Fig. 4 is a front view of the circuit protection assembly including the circuit protection device according to the present invention;
    [0061] Fig. 5 is a schematic block diagram of the circuit protection device shown in Fig. 4.
    [0063] Detailed description
    [0065] Embodiments according to the present invention will be described below with reference to the drawings. The directional terms used in the description are only used to describe the directions shown in the drawings, and are not used as a limitation.
    [0067] Fig. 1 is a schematic circuit diagram of one embodiment of a circuit protection device in accordance with the present invention. The dotted frame in the lower right corner of Fig. 1 represents a circuit board 5 of the circuit protection device, the dotted frame in the upper left corner is a circuit breaker 15. The frequency surge protection means of network 13 is connected between an L line (indicating a phase line) and an N line (indicating a neutral line) of the main line. Some of the components are implemented on the circuit board 5, and the action of the network frequency overvoltage protection means 13 is controlled by the circuit board 5. The transient current protection means 14 is connected between the lines L and N and PE of a main line, the overvoltage protection means 14 is implemented on the circuit board 5. It can be seen that the embodiment of the circuit protection device according to the present invention combines the circuits of the overvoltage protection means frequency of the network 13 and the surge protection means 14 in parallel in its circuit system, and integrates them into the same PCB circuit board, realizing the integration of two surge protection functions. The embodiment of the circuit protection device according to the present invention can perform the disconnection of a load circuit from the main line in the event of an overload or a short circuit of the power frequency overload means and / or the protection means. of transient currents cooperating with the circuit breaker 15, thus realizing the protection of load circuits and the means of protection of transient currents.
    [0069] Furthermore, as can be seen in Fig. 1, due to the presence of the network frequency overvoltage protection means 13, the aging effect of the network frequency overvoltage is reduced to a piezo resistance, which is a component protection against transient currents, and the life of the protective medium against transient currents is prolonged 14.
    [0070] Fig. 2 is a schematic circuit diagram of the transient current protection means of an embodiment of a circuit protection device according to the present invention. As can be seen in the figure, the transient current protection means 14 includes a thermal release device 17 and the piezo resistor 16 which are connected to each other in series and are integrated. The series of the thermal release device 17 and the piezo resistor 16 are connected in parallel between the line L and the line N, and an end of the piezo resistor 16 opposite the thermal release device 17 is connected in series to the gas discharge tube 10 , which in turn is connected to a PE grounded. This configuration can withstand a large instantaneous transient current in a transient condition and direct the large instantaneous transient currents to ground. The piezo resistor 16 is, for example, a MOV metal oxide piezo resistor, but the present invention is not limited thereto. Any piezo resistor that can withstand the large transient currents required can be used. The thermal release device 17 is any thermal fuse or any elastic force driven thermal release mechanism that meets the needs.
    [0072] It should be noted that the transient current protection means 14 of the present invention is also provided with indicator lights that indicate damage or normal operation of the transient current protection means, which is represented by the light emitting diodes 18 and 19 in Fig. 2. The indicator light driving circuit turns on when the voltage is normal. When the thermal trip device 17 is normal, the light emitting diode 19 turns on, and when the thermal trip device 17 is off, the light emitting diode 18 turns on. The resistors 20 and 21 are connected voltage divider resistors. in series with light emitting diodes 18 and 19, respectively. Resistor 20 can also be used as a bypass resistor for piezo resistor 16, which can bypass piezo resistor 16 for protection. The light emitting diodes 18 and 19 can have different colors to distinguish them. For example, light emitting diode 18 is red and light emitting diode 19 is green. When the protection means operates normally, the light emitting diode 19 lights up, displaying the color green. When the transient current protection means fails, the light emitting diode 18 lights up, displaying the color red. The light emitting diodes 18 and 19 are located on the circuit board 5, and the light emitted by the light emitting diodes 18 and 19 is conducted to an outer surface of the circuit protection device through a light guide terminal 6 (see Fig. 3) which is provided in optical communication with light emitting diodes 18 and 19.
    [0073] Fig. 3 is a side view showing an embodiment of the circuit protection device according to the present invention, of which the side portion of the housing is open. It can be seen from the figure that the circuit protection device according to the present invention includes a housing and connection terminals 7 provided in the housing. Connection terminals 7 connect the circuit protection device to the phase line L and to the neutral line N of the main line and to the PE ground. A side portion of the casing is open, and thus it can be seen that within the casing the following is arranged: a mechanism assembly 1, configured to actuate a main line breaking device to disconnect the main line in the overvoltage condition , thus protecting the charging circuit; a set of contacts including a first static contact 2, a second static contact 3, a first moving contact 25, and a second moving contact 26; a network frequency overvoltage break lever 8, one end of which is connected to the pole terminal L and the other is driven by the mechanism assembly 1, the first moving contact 25 and the second moving contact 26 being provided in the end of the network frequency overvoltage break lever 8 driven by the mechanism assembly 1; a mains frequency overvoltage trip lever configured to actuate the mechanism assembly 1; a mains frequency overvoltage drive coil 9 which acts when the mains frequency voltage is overloaded; and the circuit board 5 configured to control the mains frequency overvoltage drive coil 9 which acts when the mains frequency voltage is overloaded. Also provided in the housing is a transient current protection means connected to the circuit board, the transient current protection device being connected to both ends of the main line and to ground via the circuit board 5 and configured to perform protection against overvoltages in transient current conditions.
    [0075] When the voltage is normal, the first moving contact 25 and the first static contact 2 are closed, and the circuit works normally; When the mains frequency voltage is overloaded, the mains frequency overvoltage drive coil 9 acts, driving the mains frequency overvoltage trip lever to move. As a result, the mechanism assembly 1 is operated to act to close the second moving contact 26 and the second static contact 3, so that the action of the main circuit interrupting device is performed in cooperation with the circuit protection device. from the current utility mode to simultaneously disconnect the load circuit from the main circuit and disconnect the circuit board from the terminal.
    [0076] The specific structures of the mechanism assembly 1, the first static contact 2, the second static contact 3, first moving contact 25, second moving contact 26, network frequency overvoltage motor coil 9, network frequency overvoltage break lever 8, and frequency overvoltage trip lever The network of the present embodiments are not limited to the specific embodiment, and include any structure that implements network frequency surge protection.
    [0078] In the upper part of Fig. 3 you can also see a mains frequency overvoltage fault indicated by device 23. In the present embodiment, indicating device 23 is a mechanical indicating device, which is connected to the mechanism assembly. 1. If the mains frequency overvoltage drive coil 9 trips when the mains frequency voltage is overloaded, the mains frequency overvoltage drive coil 9 drives the mechanism assembly 1 to act, thereby which causes the second moving contact 26 and the second static contact 3 on the mains frequency overvoltage trip lever to close. At the same time, the action of the mechanism 1 causes the indicating device 23 to move to display a warning color. For example, the warning color is red.
    [0080] The circuit shown in Fig. 2 is implemented on the circuit board 5 shown in Fig. 3, piezo resistor 16, gas discharge tube 10, light emitting diodes 18 and 19 are externally connected to the circuit board 5. As can be seen, the circuit board 5 integrates the control of the two functions of protection against network frequency overvoltages and protection against transient currents, and the circuit protection device of the invention realizes a parallel integration of network frequency surge protection and transient current protection.
    [0082] It can also be seen in Fig. 3 that the circuit protection device of the present invention further includes a light guide terminal 6, one of the ends of which is positioned between the light emitting diodes 18 and 19, and is in optical communication with the light emitting diodes 18 and 19 for conducting the light emitted by the light emitting diode 18 or 19 to an outer surface of the circuit protection device, indicating the useful life state of the transient current protection means.
    [0084] The structure shown in Fig. 3 can be implemented in a standard module shell with a thickness of 18mm, and a compact structure design is realized, so that customers can use the space effectively and at the same time, they can meet customers' requirements for dual protection functions for protection against mains frequency surges and transient currents.
    [0086] Fig. 4 is a front view of the circuit protection assembly including the circuit protection device 11 according to the present invention; Fig. 5 is a schematic block diagram of the circuit protection device 11 shown in Fig. 4. In Figs. 4 and 5 it can be seen that the circuit protection device 11 according to the present invention and the 2-pole micro-circuit breaker 22 (2P MCB) form a circuit protection set through the bus bar 33 located below them. The charging circuit can be disconnected from the main line in the event of transient currents and frequency overvoltage of the network, thus carrying out a double protection of charging circuits. The thickness of the current protection device 11 shown in the figure in the horizontal direction is 18mm. The circuit protection device 11 of the present invention is not limited to be used in cooperation with a 2-pole micro-circuit breaker, and can form a circuit protection assembly with several circuit breakers, such as a single-pole micro-circuit breaker, a micro-circuit breaker of three poles, etc., via a corresponding bus bar quickly and conveniently.
    [0088] The circuit protection device and the circuit protection assembly of the invention simultaneously perform the protection against transient currents and the protection against overvoltages of the main line and the overvoltage protection of a branch of transient currents, which greatly reduces Measures the damage to an overvoltage function module and the subordinate loads of the main line due to overvoltage, and effectively protects the safety of equipment and personnel. At the same time, the main line is protected by integrating the network frequency overvoltage protection means and the transient current protection means in one 18mm product, which realizes a small size, low cost and good application for the customer, realizes the electronic indication of the service life of the transient current protection means and the indications of the grid frequency overvoltage fault condition and the normal operating condition, and satisfies various customer needs.
    [0090] Although the best mode of implementing the present invention has been described in detail, those skilled in the relevant art of the present invention will make various alternative designs and embodiments for practicing the present invention within the scope of the appended claims.
    权利要求:
    Claims (11)
    [1]
    1. A circuit protection device, comprising a housing in which the following are provided:
    a mechanism assembly configured to disconnect a load and a current protection device from a main line;
    a mains frequency surge drive assembly that acts to drive the mechanism assembly when a mains frequency voltage is overloaded; a circuit board connected to the main line and to ground, and configured to control the mains frequency surge drive assembly to actuate when the mains frequency voltage is overloaded and to discharge a current of transient currents when a surge occurs voltage of transient currents;
    a contact assembly comprising a first state and a second state, under a normal working voltage, the contact assembly being in the first state in which it provides an effective power supply to the circuit board, and when the voltage of network frequency is overloaded and the network frequency overvoltage drive assembly acts to drive the mechanism assembly, the contact assembly is in the second state;
    characterized because,
    a transient current surge protection means connected to the circuit board is also provided in the housing, the transient current protection means performing a surge protection in a transient current condition.
    [2]
    The circuit protection device according to claim 1, characterized in that the set of contacts includes a first static contact, a second static contact, a first moving contact and a second moving contact, the first static contact and the first contact closing. movable to provide the effective power supply to the circuit board when the set of contacts is in the first state; the network frequency surge drive assembly driving the second moving contact to close with the second static contact to disconnect the circuit board from a connection terminal when the contact assembly is in the second state.
    [3]
    The circuit protection device according to claim 1, characterized in that the protection means against transient currents comprises a piezoresistor with a thermal release device, and the piezoresistance is connected in series to a grounded gas discharge tube.
    [4]
    The circuit protection device according to claim 1, characterized in that the housing is a module with a width of 18 mm.
    [5]
    The circuit protection device according to claim 3, characterized in that the thermal release device is integrated with the piezo resistor, and the thermal release device is a thermal fuse or a thermal release mechanism driven by an elastic force.
    [6]
    6. The circuit protection device according to any of claims 1 to 5, characterized in that it further comprises a useful life indicating device for the means of protection against transient currents.
    [7]
    The circuit protection device according to claim 6, characterized in that the life indicating device is an electronic indicator light, and when the set of contacts is in the first state, an electronic indicator light driving circuit is driven to that it lights up presenting different colors depending on the different states of the thermal release device of the piezoresistor.
    [8]
    The circuit protection device according to any of claims 1 5, characterized in that it further comprises a network frequency overvoltage failure indicator device.
    [9]
    The circuit protection device according to claim 8, characterized in that the grid frequency overvoltage fault indicating device is a mechanical indicating device, and the grid frequency overvoltage fault indicating device is driven by the mechanism assembly and displays a warning color when the mains frequency overvoltage drive assembly operates with the mains frequency voltage overloaded, the contact assembly is in the second state and the mechanism assembly operates.
    [10]
    The circuit protection device according to any of claims 1 to 5, characterized in that the indicator light is a first light-emitting diode and a second light-emitting diode that are connected through the thermal release device and the piezoresistor at series in opposite directions, and a bridge is connected between the first light emitting diode and the second light emitting diode and between the thermal release device and the piezo resistor and is driven to an end of the piezo resistor opposite the thermal release device through a resistor, and therefore when the thermal release device is normal, the first light-emitting diode emits light and the second light-emitting diode does not light, and when the thermal release device is disconnected, the second light-emitting diode emits light and the first light-emitting diode light does not turn on.
    [11]
    eleven. n circuit protection assembly comprising the circuit protection device according to any of claims 1-10 and a main line breaking device cooperating with the circuit protection device.
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    同族专利:
    公开号 | 公开日
    ES2806826R9|2021-05-13|
    ES2806826R1|2021-02-24|
    RU2742927C1|2021-02-11|
    CN210200656U|2020-03-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    RU2408121C1|2009-07-07|2010-12-27|Открытое акционерное общество "Научно-исследовательский институт вычислительных комплексов им. М.А. Карцева"|Device for radio-electronic equipment overvoltage protection|
    RU2479904C1|2012-02-08|2013-04-20|Общество с ограниченной ответственностью "АТЛАНТ"|Device to monitor and control signals of relay protection and emergency automation|
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    CN107731635B|2017-01-09|2021-08-10|常州市创捷防雷电子有限公司|Backup circuit breaker for surge protector|
    FR3072179B1|2017-10-11|2020-10-09|Schneider Electric Ind Sas|ELECTRICAL FAULT DETECTION MODULE FOR AN ELECTRIC PROTECTION ASSEMBLY AND ELECTRIC PROTECTION ASSEMBLY INCLUDING SUCH A DETECTION MODULE|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    CN201920935136.XU|CN210200656U|2019-06-20|2019-06-20|Circuit protection device reaches circuit protection subassembly including it|
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