JP2013089589A - Switch selection type electronic breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically set a fixed rating of an electronic breaker by selection of an electronic controller and an electronic breaker rating setting switch accompanied by thereof.SOLUTION: An electronic controller 14 includes: a built-in memory 10 in which ratings of a plurality of electronic breakers are stored; an electronic breaker rating setting switch 8 which selects an electronic breaker rating; and a microprocessor 2 which is properly operably connected to the electronic breaker rating setting switch and the built-in memory 10. The microprocessor 2 transmits an electronic breaker rating setting value selected from the electronic breaker rating setting switch 8 in order to be stored in the built-in memory 10.

Description

  Embodiments of the present invention relate to a circuit breaker used for a three-phase three-wire system, a three-phase four-wire system, and a one-phase three-wire system, and the electronic breaker rated setting value can be set by switching an electronic breaker rating setting switch. It is.

  Conventionally, an electronic breaker has been designed to break the circuit by operating the breaker at the current value set in the current detection circuit, but the setting method is software that matches one electronic breaker rating for one application. Are individually incorporated into the microprocessor 2 in the current detection circuit.

  The present invention incorporates software for discriminating a plurality of electronic breaker ratings for a plurality of applications in advance in the microprocessor in place of the above-mentioned individual software, and sets the rating type to the electronic breaker rating setting in the current detection circuit. The switch is devised so that it can be applied to a plurality of electronic breaker rated applications simply by selecting using a DIP switch, a rotary switch, a circuit jumper pin, or the like.

  As described above, the conventional method for setting the rated current of an electronic breaker is that the software built in the current detection circuit produces and installs different software for each rated setting current value. It was not possible to convert it into an electronic breaker with a rated set current for the application of. As a result, manufacturers have had to hold an electronic breaker as a certain level of inventory for each of a plurality of uses.

  The present invention is intended to solve the problem of the preceding paragraph.

  Therefore, the present invention incorporates rated current setting values for a plurality of applications in one software in advance, and sets the breaker rated current value settings in an electronic breaker rated setting switch (DIP switch, rotary switch) installed in the current detection circuit. Select by the switch, jumper pin, etc.) and fix the current setting value for one application.

  By selecting the current value setting of each breaker with the electronic breaker rating setting switch set in the current detection circuit from a single software that has previously incorporated the rated current setting values for multiple applications, the rated current setting value Since different breakers can be easily changed according to demand, it is necessary to manufacture each breaker with different rated current values separately and to have separate inventory for each breaker with different rated current setting values. lost.

  A conventional breaker set with a rated current value incorporates one piece of software that matches the rated set value for one application, but incorporates software that does not match the set value displayed on the breaker , I had to modify the settings and reinstall the software. According to the present invention, since the rated current setting values for a plurality of applications are incorporated in advance for the breakers having a plurality of different rated current values, the rated setting values for the plurality of applications can be selected by the electronic breaker rating setting switch. . As a result, the rated set value of the electronic breaker can be easily changed. Further, the above-described display modification or software reinstallation work can be avoided.

  In the present invention, before the device performance test, it is necessary to test whether or not the switch setting in the current detection circuit is a breaker set to the rated current value. The current value breaker can be easily manufactured by the switch setting based on it.

Electronic breaker internal block diagram of the present invention

  Although embodiments are disclosed herein for detailed description, specific functional details disclosed herein are representative for purposes of describing example embodiments. Thus, example embodiments may be implemented in other forms and are not limited to only the embodiments described herein.

  Accordingly, while example embodiments can be in various modifications and alternative forms, embodiments thereof are shown by way of example in the drawings and are described herein. However, the exemplary embodiment is not limited to a specific form, and conversely, the exemplary embodiment includes all the modified examples included in the scope of the examples, equivalents thereof, and alternatives thereof. Is included. As used herein, the term “and / or” and the symbol “/” include any combination of one or more of the associated listed items.

Hereinafter, exemplary embodiments of the present invention will be described in detail.
FIG. 1 is a block diagram of an electronic breaker according to an example embodiment of the present invention. The electronic controller 14 may be included in the electronic breaker and allow for the electronic breaker rating setting described herein. The electronic breaker is an electronic device that includes the electronic controller 14 and the breaker 13 shown in FIG. 1 and protects electronic equipment from damage caused by a circuit failure. The electronic breaker includes an operating mechanism for opening and closing a conductive path to a load. The mechanism may be a mechanical switch or a solid element, but other alternatives are available. The operating mechanism is in communication with an electronic trip unit or at least an electronic detection unit capable of detecting a current state on a conductive or path. The electronic trip unit can respond to a current state on the conductive path, and can instruct the operating mechanism to open and close the conductive path based on the current state. For example, during or in response to an overcurrent condition, the electronic trip unit may instruct the operating mechanism to open a conductive path, thereby stopping or limiting the flow of current to the load. For example, the electronic trip unit may include the electronic controller 14 described above, or the electronic controller 14 may be included separately in the electronic breaker. Hereinafter, the operation parts of the electronic controller 14 will be described in more detail with reference to FIG.

  As shown in FIG. 1, the electronic controller 14 includes an electronic breaker rating setting switch 8. The electronic breaker rating setting switch 8 may be a rotary switch for inputting a desired rating of the electronic breaker by rotating a knob or a shaft, or may be a switch bank having a plurality of different settings. As used herein, the desired rating of an electronic breaker indicates the full (100%) ampere rating of the circuit depending on the cable size used for installation. For example, a rotary switch may allow a manufacturer to select a rating based on a specified value for an available electronic breaker rating. The switch bank includes a predetermined or desired set of available ratings. Such an example may include a switch for changing the rating based on the number of amperes available to the electronic breaker.

  In addition, a microprocessor 2 is illustrated in FIG. Since the microprocessor 2 is appropriately operatively coupled to the electronic breaker rating setting switch 8, it can interpret the setting of the electronic breaker rating setting switch 8. For example, if the user changes or changes the selection at the electronic breaker rating setting switch 8, the microprocessor may detect this change in state and read the new electronic breaker rating selection.

  It should be noted that although a three-phase embodiment of the electronic controller 14 has been described, a single-phase or DC embodiment can be applied to the example embodiments.

  Since the microprocessor 2 can interpret the settings entered at the electronic breaker rating setting switch 8, these settings can be further used when changing the rating of the electronic controller 14. For example, the internal memory 10 is operably coupled to the microprocessor 2. Thereby, the microprocessor 2 can store the new setting input in the electronic breaker rating setting switch 8 used in the operation of the electronic controller 14.

  Further, FIG. 1 shows an internal A / D CONVERTER (hereinafter referred to as “ADC11”) (analog-digital converter). The ADC 11 is built in the microprocessor 2. The ADC 11 senses a current derived from a current detection circuit connected to the electronic controller 14, and performs information processing based on the sensed current in the microprocessor 2.

  If the current derived from the arithmetic process exceeds the threshold of the electronic breaker that includes the electronic controller 14, the microprocessor 2 may send a trip signal 9 so that the electronic breaker trips. Further, even if the trip signal 9 is issued from the microprocessor 2, if an abnormality occurs in the trip signal 9, there may be a case where the trip does not occur. At this time, the microprocessor abnormality detection circuit 12 is detected as a microprocessor abnormality. Operates and informs with a buzzer.

  Thus, as described above, embodiments of the present invention include an electronic controller 14 for an electronic breaker that sets an electronic breaker rating. The electronic controller 14 includes a built-in memory 10 that stores an electronic breaker rating, an electronic breaker rating setting switch 8 that selects an electronic breaker rating, and a microprocessor that is operably coupled to the electronic breaker rating setting switch and the built-in memory. And 2. The microprocessor 2 interprets the rating of the selected electronic breaker of the electronic breaker rating setting switch 8 and stores the selected electronic breaker rating in the built-in memory 10 based on the selected electronic breaker rating. In this case, the microprocessor 2 directly performs a processing operation and generates the trip signal 9 based on the memory stored value read into the electronic breaker rating setting switch without adjusting / changing the amplification gain of the ADC 11 or the like.

  Further, FIG. 1 shows the external relay output 5. The external relay output 5 is directly processed by the microprocessor 2 based on the memory stored value read by the electronic breaker rating setting switch 8 without adjusting / changing the amplification gain of the ADC 11. 5 is a form in which this arithmetic processing is displayed to the outside, and the current overcurrent state is displayed by operating the relay circuit.

  Further, FIG. 1 shows the LED circuit 6 and the reset switch & buzzer 7. This is to display the current overcurrent state with an LED, and serves as a pre-breaking alarm for the electronic breaker. The reset switch is used to reset the electronic circuit that is necessary when the electronic breaker is turned on / returned next time.

DESCRIPTION OF SYMBOLS 1 Power supply of current detection circuit 2 Microprocessor 3 Current detection position 4 Current detection circuit 5 Relay drive circuit and external relay output terminal 6 LED circuit 7 Reset switch & buzzer circuit 8 Electronic breaker rating setting switch 9 Shut off (TRIP) signal 10 Built-in memory 11 Internal A / D CONVERTER (“ADC”) (Analog to Digital Converter)
12 Abnormality detection circuit 13 Breaker 14 Electronic controller

Claims (3)

  An electronic controller 14 for an electronic breaker for setting an electronic breaker rating, an internal memory 10 for storing the electronic breaker rating, and an electronic breaker rating setting switch 8 for selecting the electronic breaker rating stored in the internal memory 10 And a microprocessor 2 operatively coupled to the electronic breaker rating setting switch 8 and the built-in memory 10, and the microprocessor 2 has the electronic breaker rating set by the electronic breaker rating setting switch 8. An electronic controller 14 that interprets the ratings within and transmits the selected electronic breaker rating to the internal memory 10 for storage in the internal memory 10;   The electronic controller (14) of claim 1, further comprising an ADC (11) provided in the microprocessor (2) for providing a current level reading derived from a load current controlled by the electronic breaker.   3. The electronic controller 14 according to claim 1, wherein the electronic breaker rating setting switch 8 is a set of manual selection switch banks having a predetermined rating within the electronic breaker rating. 4.

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