WO1996028871A1 - Coupe-circuit - Google Patents

Coupe-circuit Download PDF

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Publication number
WO1996028871A1
WO1996028871A1 PCT/JP1995/000434 JP9500434W WO9628871A1 WO 1996028871 A1 WO1996028871 A1 WO 1996028871A1 JP 9500434 W JP9500434 W JP 9500434W WO 9628871 A1 WO9628871 A1 WO 9628871A1
Authority
WO
WIPO (PCT)
Prior art keywords
characteristic
circuit breaker
setting
data
time limit
Prior art date
Application number
PCT/JP1995/000434
Other languages
English (en)
Japanese (ja)
Inventor
Eietu Satou
Yukihide Yamada
Kazuya Aihara
Original Assignee
Hitachi, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to JP52744896A priority Critical patent/JP3599344B2/ja
Priority to PCT/JP1995/000434 priority patent/WO1996028871A1/fr
Publication of WO1996028871A1 publication Critical patent/WO1996028871A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/006—Calibration or setting of parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means

Definitions

  • the present invention relates to a circuit breaker, and more particularly, to a circuit breaker suitable for easily setting an arbitrary characteristic and protecting a circuit.
  • an output signal level of a current detection output stage for detecting a current flowing through an electric circuit is disclosed.
  • a plurality of level detection means for detecting the level and time-limit generating means provided corresponding to each of the level determination means enable the equipment to be located higher and lower in the power distribution system. It is known to achieve protection coordination on the characteristics of the above.
  • the pick-up level of the level discrimination means is adjustable, and the customer arbitrarily adjusts the level, for example, as shown in FIG.
  • the long time trip property E when the trip time for the load current has the long time trip property E, the short time trip property F and the instantaneous trip property G, the long time trip property E and the short time
  • the current levels A and C at which the respective time-delay elements of the time-delay trip characteristic F operate can be adjusted, and the operating time BD can also be adjusted to improve the margin for coordination.
  • the characteristic adjustment switch is provided on the circuit breaker main body, when the adjustable items are increased so that the characteristic setting margin on the customer side can be improved, the characteristic adjustment switch is not provided.
  • the number of switches will also increase at the same time, but the mounting space is limited, which limits the increase in adjustable items.
  • An object of the present invention is to set an arbitrary time-dependency characteristic curve desired by a customer without increasing the number of characteristic adjustment switches provided in the circuit breaker main body in order to solve the above-mentioned problems.
  • An object of the present invention is to provide a circuit breaker that enables easy protection coordination.
  • a storage element for storing a plurality of selectable initial setting data is provided in the circuit breaker, and data is input to the storage element in the circuit breaker from a characteristic setting device independent of the circuit breaker body. This is achieved by configuring to set and adjust the time limit characteristic shape.
  • the circuit breaker body Since the data after setting and adjustment are arbitrarily performed by the characteristic setting device and transferred to the storage element in the circuit breaker, the circuit breaker body does not require a switch for time limit characteristic adjustment. Can be done. Also, the number of adjustable items can be easily increased irrespective of the mounting space.
  • FIG. 1 is a block diagram showing a circuit configuration of a circuit breaker according to one embodiment of the present invention.
  • FIG. 2 is a cross-sectional view showing a configuration of a main part of a circuit breaker according to one embodiment of the present invention.
  • FIG. 3 is a block diagram showing a circuit configuration of a system using a circuit breaker according to one embodiment of the present invention.
  • FIG. 4 is a perspective view showing a configuration of a system using a circuit breaker according to one embodiment of the present invention.
  • FIG. 5 is a block diagram showing a circuit configuration of a system characteristic setting device using a circuit breaker according to one embodiment of the present invention.
  • FIG. 6 is a characteristic diagram illustrating a method for setting characteristics of a circuit breaker according to one embodiment of the present invention.
  • FIG. 7 is an explanatory diagram of point cloud data used for setting characteristics of the circuit breaker according to one embodiment of the present invention.
  • FIG. 8 is a characteristic diagram illustrating a characteristic setting method in consideration of protection coordination of a circuit breaker according to one embodiment of the present invention.
  • FIG. 9 is a flowchart of a main routine of the circuit breaker according to one embodiment of the present invention.
  • FIG. 10 is a flowchart of data processing received from a characteristic setting device of a circuit breaker according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of data processing of a system characteristic setting device using a circuit breaker according to an embodiment of the present invention.
  • Fig. 12 is a diagram showing an example of a display screen of the remote display function of the circuit breaker according to one embodiment of the present invention.
  • Figure (B) shows the display screen of the trip information on the circuit breaker with ID number 2
  • Fig. 13 is a characteristic diagram showing a method of setting the time limit characteristics of the conventional circuit breaker.
  • FIG. 2 shows the configuration of the main part of the circuit breaker 20 of the present embodiment.
  • the housing 20a of the circuit breaker 20 has a substantially rectangular parallelepiped outer shape.
  • a current transformer (hereinafter referred to as CT) 1 as a means for detecting a load current flowing through the electric circuit 15, and the trip device 8 is driven by a current signal detected by the CT 1
  • CT current transformer
  • the display unit 11 provided in the control device 18 is arranged so that the display contents can be read from the surface force provided with the handle 27 of the housing 20a. Also, this surface is connected via a communication cable 40.
  • FIG. 1 shows the block configuration of controller 18.
  • the conductor 15b on the load side of the circuit 15 penetrates the CT1 and the current signal detected by the CT1 is converted into digital binary data by the signal detector 2 and the AZD converter 3. It is converted and input to a micro processor unit (hereinafter referred to as MPU) 4 as an arithmetic means.
  • MPU micro processor unit
  • the MPU 4 has a plurality of selectable initial setting data stored in the storage element 5 as storage means, and the characteristic setting devices 30 and 32 as characteristic setting means independent of the circuit breaker 20 main body. Then, the data input to the storage element 5 is calculated, and the time limit characteristic shape is set and adjusted so as to obtain a desired time limit characteristic.
  • the output of the MPU 4 is supplied to the trigger circuit 7 or the alarm device driving circuit 17.
  • Circuit 15 cut off circuit If the current value is required, the output of the MPU 4 is supplied to the trigger circuit 7, the trip device 8 is energized, and the opening and closing mechanism 25 is operated by the operation of the trip mechanism 26. The trip is performed, and the trip operation of the contact 14 of the circuit breaker 20 is performed.
  • the output of the MPU 4 is supplied to the alarm device driving circuit 17 and the alarm circuits 9 and 10 are activated.
  • the output operation of the external information device 50 is controlled.
  • the alarm device drive circuit 17 and the alarm circuits 9 and 10 constitute alarm means.
  • the reporting circuits 9 and 10 consist of contact relays or semiconductor switching elements such as transistors and SCRs, and the external alarm device 50 emits light and sound. Informs that the current value is approaching the trip value by both. Specifically, displays that use light such as discharge lamps, light bulbs, or display lamps using light-emitting elements such as LEDs, CRTs, plasmas, or displays such as liquid crystal displays, etc. Devices that display sound, such as buzzers, bells, chimes, sirens, etc., generate sound physically, and oscillating circuits, ICs, etc. generate sound electronically.
  • characteristics are set via a communication cable 40 as a transmission means connected to a connector 12a connected to a data transmission / reception unit 12 of a circuit breaker 20.
  • the device 30 or 32 is connected, and the alarm circuit 9 is connected to an external hairdressing device 50.
  • the characteristic setting devices 30 and 32 may be, for example, a general noise control device 30 installed in a central monitoring room or the like that is remote from the installation location of the circuit breaker 20. Alternatively, a portable computer 32 may be used.
  • the data communication function may be a communication interface 30b32b and a data input device may be a mouse. It is only necessary to have a function that can start a dedicated program for setting the characteristics, such as the key 31 or the keyboard 33. As shown in Fig.
  • these characteristic setting devices include a CPU for performing arithmetic processing, a RAM for storing data or a program for arithmetic processing, and a RAM for storing data or programs for performing arithmetic processing.
  • ROM input device such as mouse 31 or keyboard 33, communication interface 30b, 32b, CRT 30a as display device, liquid crystal display It has a play 32a, and further has an external storage device 35 such as a floppy disk drive.
  • the transmission means is not limited to the communication cable 40, but may be optical transmission using an optical fiber or transmission using wireless communication using visible light, infrared light, electromagnetic waves, or the like. But it's fine.
  • data is input from the characteristic setting devices 30 and 32. Therefore, it is not necessary to increase the number of adjustment switches on the circuit breaker main body side, and it is possible to prevent an increase in the dimensions of the circuit breaker main body.
  • the data of the overcurrent capability of the circuit breaker itself is held in the storage element 5 in the circuit breaker 20 and the characteristic is set by the characteristic setting device 30 or 32 outside the circuit breaker.
  • the non-settable area V is displayed on the displays 30a and 32a at the time when the operation is performed.
  • the time-delay characteristic setting consists of the time-delay characteristic curve data of the circuit breaker for which the characteristics displayed on the displays 30a and 32a are to be set in the area to be set, as an aggregate of point cloud data.
  • the CPU obtains a time limit characteristic curve by first-order complementing the input point cloud data. Even if the point cloud data is intentionally set in the unsettable area V, safety can be ensured by setting the characteristic setting program of the characteristic setting device so that the data will not be accepted. .
  • the operating time is shown on the vertical axis and the load current is shown on the horizontal axis as shown in FIG.
  • the taken coordinate system is displayed, and on this coordinate system, the unsettable region V and the boundary line IV where the characteristics must not be set due to the overcurrent withstand capability of the circuit breaker itself are displayed.
  • Setting of characteristics The setting is performed by setting and inputting a plurality of points on the coordinate system through which the time limit characteristic curve of the circuit breaker to be set passes outside the non-settable region V.
  • the time-dependent characteristic curve data of the circuit breaker is given as an aggregate of data (point group data) of points on a plurality of coordinate systems through which the time-dependent characteristic curve passes.
  • the data of the time characteristic curve ⁇ of the circuit breaker, the characteristic curve ⁇ of the alarm circuit output, and the data of the point at which the respective characteristic curves bend on I are given as the point cloud data.
  • the output characteristic I of the Yunbo circuit is a low urgency alarm, which activates a warning device, such as an indicator light, that supplies this output when the circuit current reaches a specified ratio with respect to the current to be interrupted.
  • the alarm circuit output characteristic ⁇ is a highly urgent reminder, which activates an alarm device, such as an electronic sound generator, to which this output is supplied when the circuit current increases further and approaches the current to be interrupted. Let it. In the example of Fig.
  • the load current is around 100% of the rated current, and the output characteristic I of the hairpin circuit and the output characteristic ⁇ of the alarm circuit intersect, but such a setting is originally preferable. Absent.
  • the characteristic curve is displayed on the display 30a or 32a. In such a case, while checking the display, the output characteristics of the hairpin circuit output characteristic I and the oath circuit output characteristic are checked. It is only necessary to reset so that ⁇ does not cross.
  • the time limit characteristic curve ⁇ of the circuit breaker is set so as not to cross any of these between the boundary IV of the unsettable area V and the output of the alarm circuit ⁇ .
  • the point cloud data set in this way is negative as shown in Fig. 7.
  • the current point data on the load current axis and the corresponding operation time point data on the operation time axis are represented by a set of data.
  • the collective data of the characteristic setting devices 30 and 32 are transferred to the circuit breaker 20 by data communication via the communication cable 40.
  • the received aggregate data is stored once in the storage element 5, and is expanded on the RAM in the MPU 4, and is subjected to time limit characteristic calculation.
  • the MPU 4 can provide the point cloud even if the point cloud data is directly given in the set table format as shown in Fig. 7. Data can be restored to characteristic curves.
  • the upper and lower ranks can be connected when setting the characteristics of the circuit breaker. It will also be possible to easily confirm protection coordination with the equipment to be controlled.
  • the thermal characteristic curve VI of a higher-level device and the operating characteristic curve VI of a lower-level device are stored, and these are stored when setting the characteristics of the circuit breaker.
  • the data is displayed on the same screen of the displays 30a and 32a, and input is made so that the point cloud is located between them. The characteristics can be set easily while confirming the conditions.
  • the flow of setting the characteristics of the MPU 4 will be explained with reference to Figs. 9 to 11.
  • Figure 9 shows the main routine for setting the characteristics. Start with step 100, set the time limit characteristic with step 101, and clear the characteristic reset flag with step 102.
  • step 103 it is determined whether or not the characteristic resetting flag has been set.If the flag has been set, the flow returns to step 101 to reduce again. The same characteristics are set, and then the operation proceeds to step 102, where the clearing of the characteristic resetting flag is performed, and the operation proceeds to step 103.
  • step 103 it is determined whether or not the characteristic resetting flag is set. If the flag is not set, it is set in step 101. Perform control with the timed characteristic, return to step 103, and proceed to step 101 or step 104 with YES or NO in the characteristic reset flag set. .
  • Figure 10 shows the flow of the interrupt process when data is received from the property setting device. If there is an interrupt for data reception in step 200, it is determined in step 201 whether all data has been received. If all data has not been received, the process proceeds to step 202 and ends. If reception of all data has been completed, the process proceeds to step 211, and it is determined whether or not data in the characteristic setting impossible area has been requested from the characteristic setting device. If the data in the non-characteristic setting area is requested, proceed to step 2 12, transmit the data in the non-characteristic setting area, proceed to step 2 13, and process Ends. If the data of the characteristic setting impossible area is not requested, proceed to step 221, and determine whether the characteristic setting point group data has been received.
  • step 222 If the characteristic set point group data has been received, the process proceeds to step 222 to perform the complement operation of the point group data to set the characteristic. Next, proceed to step 2 23, set the characteristic resetting flag, proceed to step 2 24, and end the processing. If the characteristic set point group data has not been received, the process proceeds to step 231, and it is determined whether or not the status information is requested. If the status information is requested, the process proceeds to step 232, the status information of the circuit breaker is transmitted, and the process proceeds to step 233 to end the process. If no status information has been requested, go to step 240 and end the process.
  • Figure 11 shows the process flow of the property setting device during property setting.Start at step 300 and start at step 310 to determine whether or not it is in the property setting mode. Go. If the mode is the characteristic setting mode, proceed to step 311 to send a code to the circuit breaker to request data in the characteristic setting disabled area. Next, the process proceeds to step 312, and it is determined whether the data reception is completed. If the data reception has not been completed, the process returns to step 312 again.If the data reception has been completed, the process proceeds to step 313, and the process proceeds to step 313 for the device connected from the external storage device 35 to the upper or lower device. Read the characteristic data. Then, proceed to step 3 14 to receive the input of the characteristic data of the circuit breaker and display this data.
  • Step 315 determines whether to transmit the characteristic setting data to the circuit breaker. If you do not send Return to step 3 1 4.
  • step 3 16 When transmitting, proceed to step 3 16 to transmit data.
  • step 317 it is determined whether the characteristic setting mode has been completed. If not, return to step 314; otherwise, return to step 301.
  • step 302 determines whether the mode is the status information display mode. If it is the status information display mode, proceed to step 3 2 1 to send a code requesting the status information to the circuit breaker.
  • step 3222 it is determined whether the reception of the status information data is completed. If the data reception is not completed, the process returns to step 322. If the data reception is completed, the process proceeds to step 322 to display the status information of the circuit breaker. Next, the process proceeds to step 324 to determine whether or not the status display mode has ended. If not completed, return to step 3 2 3. If completed, return to step 3 0 1.
  • a program for sending back the requested information in response to an information transfer request from an external device is incorporated in the MPU 4 of the circuit breaker 20. Since it has a communication function, for example, it becomes possible to remotely monitor the state of the circuit breaker 20 after the start of energization with the characteristic setting devices 30 and 32. In this case, an ID number is assigned to the circuit breaker, and when a plurality of circuit breakers are connected to the characteristic setting device, a different ID number is given to each circuit breaker.
  • the characteristic setting devices 30 to I A request to transfer current information is made to the circuit breaker with D number 1,
  • the status information of the circuit breaker of ID number 1 and the status information of the circuit breaker of ID number 2 at that time can be displayed.
  • an alarm signal code can also be transmitted from the circuit breaker 20 to the characteristic setting devices 30 and 32 or an external monitoring device.
  • the built-in data communication function makes it possible to support information networks.

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  • Emergency Protection Circuit Devices (AREA)

Abstract

Procédé de détermination des caractéristiques de limite de temps d'un coupe-circuit, permettant d'augmenter le degré de liberté dans la détermination de cette caractéristique et facilitant la coopération entre les protections. Les caractéristiques voulues de limite de temps, par exemple un ensemble de données de groupes ponctuels, sont communiquées à un coupe-circuit par un dispositif extérieur de détermination des caractéristiques, par l'intermédiaire de la section de transmission et de réception des données du coupe-circuit. Ainsi, il est possible de déterminer des caractéristiques de limite de temps arbitraires, et la coopération dans la protection entre les dispositifs des couches supérieures et inférieures est plus facile. Aucun bouton de réglage supplémentaire n'est nécessaire sur le coupe-circuit, et l'on évite d'augmenter la taille du corps principal du coupe-circuit.
PCT/JP1995/000434 1995-03-15 1995-03-15 Coupe-circuit WO1996028871A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP52744896A JP3599344B2 (ja) 1995-03-15 1995-03-15 回路遮断器
PCT/JP1995/000434 WO1996028871A1 (fr) 1995-03-15 1995-03-15 Coupe-circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1995/000434 WO1996028871A1 (fr) 1995-03-15 1995-03-15 Coupe-circuit

Publications (1)

Publication Number Publication Date
WO1996028871A1 true WO1996028871A1 (fr) 1996-09-19

Family

ID=14125743

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1995/000434 WO1996028871A1 (fr) 1995-03-15 1995-03-15 Coupe-circuit

Country Status (2)

Country Link
JP (1) JP3599344B2 (fr)
WO (1) WO1996028871A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009016274A (ja) * 2007-07-06 2009-01-22 Fuji Electric Assets Management Co Ltd 回路遮断器
JP2009170338A (ja) * 2008-01-18 2009-07-30 Chubu Electric Power Co Inc 低圧電力契約用遮断器
JP2011151985A (ja) * 2010-01-22 2011-08-04 Mitsubishi Electric Corp 整定値設定装置および保護継電装置
WO2019064453A1 (fr) * 2017-09-28 2019-04-04 三菱電機株式会社 Disjoncteur électronique
WO2019234927A1 (fr) * 2018-06-08 2019-12-12 三菱電機株式会社 Disjoncteur électronique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54142552A (en) * 1978-04-27 1979-11-06 Toshiba Corp Overcurrent protection device
JPS5720120A (en) * 1980-04-15 1982-02-02 Westinghouse Electric Corp Breaker
JPH03124216A (ja) * 1989-03-20 1991-05-27 Fuji Electric Co Ltd 低圧開閉器の設定装置
JPH06217449A (ja) * 1992-10-27 1994-08-05 Westinghouse Electric Corp <We> プログラム可能な通信及び作用停止機能を有する過電流保護装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54142552A (en) * 1978-04-27 1979-11-06 Toshiba Corp Overcurrent protection device
JPS5720120A (en) * 1980-04-15 1982-02-02 Westinghouse Electric Corp Breaker
JPH03124216A (ja) * 1989-03-20 1991-05-27 Fuji Electric Co Ltd 低圧開閉器の設定装置
JPH06217449A (ja) * 1992-10-27 1994-08-05 Westinghouse Electric Corp <We> プログラム可能な通信及び作用停止機能を有する過電流保護装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009016274A (ja) * 2007-07-06 2009-01-22 Fuji Electric Assets Management Co Ltd 回路遮断器
JP2009170338A (ja) * 2008-01-18 2009-07-30 Chubu Electric Power Co Inc 低圧電力契約用遮断器
JP4615571B2 (ja) * 2008-01-18 2011-01-19 中部電力株式会社 低圧電力契約用遮断器
JP2011151985A (ja) * 2010-01-22 2011-08-04 Mitsubishi Electric Corp 整定値設定装置および保護継電装置
WO2019064453A1 (fr) * 2017-09-28 2019-04-04 三菱電機株式会社 Disjoncteur électronique
WO2019234927A1 (fr) * 2018-06-08 2019-12-12 三菱電機株式会社 Disjoncteur électronique
JPWO2019234927A1 (ja) * 2018-06-08 2021-01-07 三菱電機株式会社 電子式回路遮断器
CN112236914A (zh) * 2018-06-08 2021-01-15 三菱电机株式会社 电子式电路断路器

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