JP2007288868A - Breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a breaker which can start or stop the supply of an electric circuit easily and surely by eliminating the risk of short circuit or electric shock. <P>SOLUTION: The breaker 100 is mounted inside customers' houses and allows or stops the feed to a consumer. The breaker is composed of a card holder 110 which holds a card 200 capably of insertion and ejection; and a disconnecting switch 140 which comprises a card detector 120 that detects the existence of the card in the card holder 110, and generates card information and an electromagnetic relay 130 that allows or inhibits the feed to the above power meter, based on the card information. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shut-off device, and more particularly to a shut-off device that is attached to a power line supplied to a consumer's indoor load from a supplier such as an electric power company, and that allows or prohibits power feeding to the consumer.

  FIG. 6 is a schematic diagram illustrating an example of a conventional power supply facility for a consumer. The electric power from the electric power company is supplied to the house 10 from the electric power supply facility 20 including the electric pole 21 on which the electric power line 22 is suspended. In this example, the low voltage lead-in wire 23 is connected from the utility pole 21 to the lead-in wire attachment point 30 arranged in the customer's house 10, and is drawn into the distribution board 50 from the lead-in wire attachment point 30 through the integrated wattmeter 40. ing. This integrated wattmeter 40 displays the electric power consumption of the house 10 on the integrated value window 42 by using a multiplier 41 as a coefficient. The distribution board 50 is also provided with a leakage breaker 51 and a safety breaker 52 for each circuit of the indoor wiring. Note that the lead-in wire attachment point 30 may not be provided. In this case, the low-voltage lead-in wire 23 is directly connected to the integrating wattmeter 40 without passing through the lead-in wire attachment point 30 (Patent Document 1, Paragraph 0006 and FIG. 1). reference).

  In this state, when a resident moves into a new house or a new building, when a new resident moves into an existing house where power supply has been stopped, the power supply is stopped due to the absence of a long period of time. When a resident returns to a house, etc., the power consumer requests the power company to start power supply when the occupancy starts. In such a case, the electric power company has dispatched a worker to the site each time to connect the low-voltage service line 23 to the service customer's service line attachment point 30 and the integrating wattmeter 40. In addition, when the customer stops using the electric power, the electric power company stops the power supply, and dispatches a worker to the site to remove the low-voltage lead-in wire 23.

  In such an operation, the electric wire which is the low-voltage lead-in wire 23 is attached to and removed from the lead-in wire attachment point 30 or the terminal of the integrating wattmeter 40 using a fastener such as a screw.

  Further, the above-mentioned integrated wattmeter is described in Patent Document 1, and the connection at the consumer at the start of power supply is described in Patent Document 2.

JP 2002-163300 A Japanese Patent Application Laid-Open No. 10-112944

  By the way, as described above, at the start and stop of the supply of the electricity use line, the low-voltage service line 23 and the terminals connected to the low-voltage service line 23 are exposed and a voltage is applied. In such a state, the operator who connects and disconnects the terminals needs to pay sufficient attention so as not to short-circuit the low-voltage lead-in wire 23 and the terminals, which are the charging parts, or to receive an electric shock. .

  Therefore, an object of the present invention is to provide a shut-off device that can easily and surely start and stop the supply of an electric line without the risk of a short circuit or an electric shock.

  In order to solve the above-described problem, the present invention enables a card to be inserted into and removed from a shut-off device that is attached to a power line supplied to a consumer's indoor load from a supplier and that allows or prohibits power supply to the consumer. A card holding unit to hold, a card detection unit that detects the presence or absence of a card in the card holding unit to generate card information, a disconnection switch unit that allows or prohibits power supply to the power measurement device based on the card information, It comprises as what is provided.

  According to the present invention, the power supply can be started simply by inserting the card into the shut-off device, while the power supply can be stopped simply by removing the card from the shut-off device, so that the charging unit is exposed. Therefore, there is no possibility of short circuit or electric shock, and power supply start / stop work can be performed safely and with high efficiency.

  Embodiments of a shut-off device according to the present invention will be described below. FIG. 1 is a schematic diagram showing an arrangement state of power distribution equipment to a consumer using a shut-off device according to an embodiment of the present invention.

  The electric power from the electric power company is supplied to the house 10 from the electric power supply facility 20 including the electric pole 21 on which the electric power line 22 is suspended. In this example, a low-voltage service line 23 is connected from the utility pole 21 to a service line attachment point 30 disposed in the customer's house 10. Moreover, this lead-in wire attachment point 30, the interruption | blocking apparatus 100 which concerns on this example, the interruption | blocking apparatus 100, the integrating | accumulating wattmeter 40, the integrating | accumulating wattmeter 40, and the distribution board 50 are a connection state. The integrating wattmeter 40 and the distribution board 50 are the same as those shown in the conventional example, the integrating wattmeter 40 has an integrating machine 41 and an integrated value window 42, and the distribution board 50 has an earth leakage breaker 51. And a safety breaker 52 is arranged.

  FIG. 2 is a perspective view showing an external appearance of the blocking device 100 shown in FIG. In this example, the card 200 can be inserted into and removed from the blocking device 100, and the card holding unit 110 that holds the inserted card 200 and power supply based on the presence or absence of the card 200 in the card holding unit 110 are allowed. Alternatively, the forbidden disconnection switch unit 140 is disposed therein. Note that a pilot lamp 101 indicating a power supply state in the cutoff device 100 appears on the front side of the cutoff device 100.

  The card 200 is formed by sticking a conductive portion 202 made of a good conductor, for example, a metal foil such as gold, silver, copper, or aluminum, to a plate material 201 made of synthetic resin. The card 200 can be written with characters, symbols and the like such as an ID number as needed, and can be used for managing the distribution status of consumers.

  FIG. 3 is a circuit diagram showing a configuration of the shut-off device shown in FIG. In this example, the disconnection switch unit 140 starts or stops power supply to the power measurement device based on the card detection unit 120 that detects the presence or absence of a card in the card holding unit 110 and generates card information. And an electromagnetic breaker 130 that is a disconnect switch unit.

  The card detection unit 120 includes a low voltage lead wire 23 extending from the lead wire attachment point 30 and two contacts 122 and 123 connected to the coil 131 of the electromagnetic breaker 130 on the board 121. In this example, low-voltage power is supplied to the contacts 122 and 123 and the coil 131 via the low-voltage circuit 150. Then, the contact points 122 and 123 are inserted into the card holding unit 110 and the conduction unit 202 contacts the contact points 122 and 123 in a state where the card holding unit 110 holds the card 200. As a result, both contacts 122 and 123 become conductive. On the other hand, when the card 200 is removed from the card holding part 110, the conducting part 202 is separated from both the contacts 122, 123, and the both contacts 122, 123 are in a non-conducting state.

  The electromagnetic breaker 130 is connected to the coil 131 that is energized and excited when the contacts 122 and 123 become conductive, the iron core 132 that is driven by the magnetic force of the coil 131, and the iron core 132. And a switch unit 134 that permits and prohibits power feeding from the lead-in wire attachment point 30 to the integrating wattmeter 40. Here, the iron core 132 is always urged so that the switch part 134 is in a non-conductive state. For this reason, unless the card 200 is inserted and the contacts 122 and 123 are made conductive, the switch unit 134 is kept nonconductive.

  Next, the operation of the cutoff device 100 according to this example will be described.

  In the house 10, the low-voltage lead wire 23 is drawn into the lead-in wire attachment point 30, and between the lead-in wire attachment point 30 and the interruption device 100, between the interruption device 100 and the integrated wattmeter 40, and between the integrated wattmeter 40 and the distribution board 50, During the period, the connection is established. Further, no card is inserted into the card holding unit 110, the switch unit 134 is in a non-conducting state, and power supply to the integrated wattmeter 40 is stopped.

  In a state where the power supply is stopped, when power supply is started due to a demand of a consumer or the like, an operator of the electric power company brings the card 200 dedicated to the house 10 and goes to the house 10.

  When the operator inserts the card 200 into the card holding unit 110 of the blocking device 100, the contact 122 and the contact 123 come into contact with the conduction unit 202 of the card 200 and become conductive. As a result, a current flows through the coil 131, the iron core 132 moves, the switch unit 134 becomes conductive, and power feeding from the lead-in wire attachment point 30 to the integrating wattmeter 40 is allowed. As a result, power supply to the house 10 is started.

  In addition, when power supply is stopped due to a customer's request or the like from the power supply state, an operator of the power company goes to the house 10 and extracts the card 200 from the card holding unit 110. By extracting the card 200, the conducting portion 202 is removed from between the contact 122 and the contact 123, the contact 122 and the contact 123 are brought into a non-conducting state, the current flowing through the coil 131 is cut off, and the iron core 132 is cut off. , The switch unit 134 is turned off, and power supply to the integrating wattmeter 40 is prohibited. Thereby, the power supply to the house 10 is stopped.

  As described above, according to the shutoff device according to the present example, the operator does not need to perform the work held in his / her hand without exposing the power feeding unit such as the low-voltage lead-in wire 23 in the power feeding start / stop work. There is no risk of short circuit or electric shock, and power supply start / stop work can be performed safely and with high efficiency.

  Further, according to the shut-off device 100 according to the present example, when the shut-off device 100 is used, it is only necessary to newly install the shut-off device 100 in the existing power feeding equipment in the house, and the existing power feeding equipment can be used as it is. .

  FIG. 4 is a circuit diagram showing a second embodiment of a shut-off device according to the present invention. The shut-off device 300 according to this example uses an IC card 210 as a card. The blocking device 300 according to this example includes an IC card reader 310, and the IC card reader 310 includes a data transmission / reception unit 311 and an antenna (not shown). In addition, the IC card 210 is configured such that a synthetic resin card body 211 incorporates an IC chip 212 and an antenna (not shown), and exchanges radio waves with a data transmission / reception unit 311 provided in the IC card reader 310. To do. By this exchange of radio waves, the IC card reader 310 detects the presence or absence of the IC card 210.

  In addition, the IC card reader 310 includes a switch 312 that is turned on when the data transmitting / receiving unit 311 detects the IC card 210. In addition, the same code | symbol is attached | subjected to the part same as the said example in the figure.

  Therefore, according to the cutoff device 300 according to the present example, when the IC card reader 310 detects the IC card 210, the switch 312 is in a conductive state, the iron core 132 of the coil 131 is driven, and the switch unit 134 is in a conductive state. Therefore, according to the cutoff device 300 according to the present example, the power feeding start / stop operation can be performed safely and with high efficiency as in the above example.

  FIG. 5 is a circuit diagram showing a third embodiment of a shut-off device according to the present invention. The blocking device 400 according to this example uses a card 220 with a barcode 211 attached thereto. The blocking device 400 according to this example includes a barcode reader 410, and the barcode reader 410 includes a barcode reader 411 that reads the barcode. The barcode reader 410 detects the presence / absence of the card 220 by reading the barcode 221 of the card 220 with the barcode reader 411 and collating it with predetermined data.

  In addition, the barcode reader 410 includes a switch 412 that is turned on when the barcode reader 411 detects the card 220. In addition, the same code | symbol is attached | subjected to the part same as the said example in the figure.

  Therefore, according to the blocking device 400 according to the present example, when the barcode reader 410 detects the card 220, the switch 412 is turned on, the iron core 132 of the coil 131 is driven, and the switch unit 134 is turned on. Therefore, according to the shutoff device 400 according to the present example, similarly to the above example, the power feeding start / stop operation can be performed safely and with high efficiency.

  In the case described above, the ID number can be recorded on the card IC chip or the barcode, and the power supply state of the card and the customer can be managed. Further, in the case of recognizing a card in a non-contact manner as described above, it is possible to avoid problems associated with contact failure of contacts.

It is a schematic diagram which shows the arrangement | positioning state of the power distribution equipment to the consumer using the interruption | blocking apparatus which concerns on embodiment of this invention. It is a perspective view which shows the external appearance of the interruption | blocking apparatus shown in FIG. It is a circuit diagram which shows the structure of the interruption | blocking apparatus shown in FIG. It is a circuit diagram which shows the structure of the interruption | blocking apparatus which concerns on other embodiment. It is a circuit diagram which shows the structure of the interruption | blocking apparatus which concerns on other embodiment. It is a schematic diagram which shows the arrangement | positioning state of the power distribution equipment to the conventional consumer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Circuit breaker 110 Card holding part 120 Card detection part 122 Contact 123 Contact 130 Electromagnetic switch 140 Disconnect switch part 200 Card 202 Conduction part

Claims (3)

In a shut-off device that is attached to a power line that supplies power to a consumer from a supplier and allows or prohibits power feeding to the consumer,
A card holding unit for holding the card as insertable and removable;
A card detection unit that detects the presence or absence of a card in the card holding unit and generates card information;
A disconnect switch unit that allows or prohibits power supply to the power measurement device based on the card information;
A shut-off device comprising:   2. The interruption device according to claim 1, wherein the disconnection switch unit allows power supply when the card information becomes a card presence and prohibits power supply when the card information becomes empty. The card comprises a conductive conducting part,
The card detection unit has a contact that contacts the conductive part of the card held in the card insertion unit, and includes a switch that generates an on / off signal that is card information,
The said interruption | blocking switch part is equipped with the electromagnetic interrupter which accept | permits or prohibits electric power feeding according to the said on / off signal, The interruption | blocking apparatus of Claim 2 characterized by the above-mentioned.

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