JP2022011347A - Current detector and watt-hour meter using the same - Google Patents

Abstract

To provide a current detector for fixing a conductor when incorporating the conductor in the current detector.SOLUTION: A current detector includes: a current detection section 3A; a first insulator section 1A having a first magnetic body attaching section 1Aa, a first insulation sliding section 1Ab, and a first fixed sliding section 1Ac; a second insulator section 5A having a second current detection attaching section 5Aa, a second magnetic body attaching section 5Ab, a second insulation sliding section 5Ac that fits and slides the first insulation sliding section, a second sliding fixing section 5Ad, and a second opening side closing fixing section 5Ae; and a fixing component 6A having a fixed sliding section 6Aa that fits and slides the first fixed sliding section, a fixed sliding fixing section 6Ab having a pawl section 6Ac for fixing by fitting and sliding the second sliding fixing section, and a fixed opening side closing fixing section 6Ad that fits and fixes the second opening side closing fixing section. The current detector slides the second insulator section in a direction away from the first insulator section to have an opening state, inserts a conductor into a center section, slides the second insulator section in a direction approaching the first insulator section to have a closed state, slides the fixing component, fits the pawl section to the second sliding fixing section and, at the same time, fits the fixed opening side closing fixing section to the second opening side closing fixing section.SELECTED DRAWING: Figure 1

Description

The present invention relates to a current detection device that detects the magnitude of a current flowing through a conductor by magnetic-electric conversion, and a watt-hour meter using the same.

Conventionally, a current detection device that is installed in a general household, a factory, an office, or the like to detect a load current is known. This current detection device includes, for example, a conductor that generates a magnetic field when a load current flows, and a magnetic-electric conversion unit that detects the magnetic field generated by the conductor. The magnetic-electric conversion unit is formed by a coil in which a conducting wire such as an enamel wire is wound around a donut-shaped magnetic core called a toroidal core. When assembling this current detection device, it is necessary to pass a conductor through the hole of the magnetic core, and the work is troublesome, so that there is a problem that the current detection device becomes expensive (see Patent Document 1).

The solution to this problem is a current detection device that can pass a conductor by dividing the magnetic material portion into two and sliding the magnetic material portion (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2005-37297 Patent No. 5731876

However, when the magnetic material portion is slid and fixed, there are cases where the alignment is disengaged and the current detection device is not fixed. Therefore, it was necessary to fix it securely.

An object of the present invention is to provide a current detection device capable of improving reliability by sliding and securely fixing a magnetic material portion during work of incorporating a conductor into a current detection device, and a watt-hour meter using the same. do.

In order to solve the above problems, claim 1 of the present invention is a first aspect of the present invention, which is arranged so as to surround the conductor on a plane orthogonal to the direction of the measured current flowing through the conductor and forms a part of a magnetic circuit. A magnetic material unit, a second magnetic material unit arranged opposite to the first magnetic material unit, a current detection unit arranged in the magnetic path of the magnetic circuit to detect a magnetic field, and a first magnetic material to which the first magnetic material unit is attached. A first insulator portion having a body mounting portion, a first insulating sliding portion, and a first fixed sliding portion, a second current detection mounting portion for mounting the current detection portion, and a second magnetism for mounting the second magnetic body portion. A second body having a body mounting portion, a second insulating sliding portion that fits and slides on the first insulating sliding portion of the first insulator portion, a second sliding fixing portion, and a second opening-side closed fixing portion. 2 The insulator portion, the fixed sliding portion that fits and slides on the first fixed sliding portion of the first insulator portion, and the second sliding and fixing portion of the second insulator portion. A fixed sliding fixing part of a snap-fit structure having a claw at the tip for fixing the sliding, and a fixed opening side closed fixing part that is fitted and fixed to the second opening side closed fixing part of the second insulator part. The second insulator portion is slid to open in a direction away from the first insulator portion, the conductor is inserted into the central portion, and then the first insulator portion is approached. After sliding the second insulator portion in the direction to close the closed state, the fixing component is slid and the claw portion of the fixed sliding fixing portion of the fixing component is the second of the second insulator portion. At the same time as fitting to the sliding fixing portion, the fixing opening side closed fixing portion of the fixing component is fitted to the second opening side closing fixing portion of the second insulator portion.

According to claim 2, the second insulator portion is provided with a second sliding side closed fixing portion, and the fixing component is fixed to the fixing component corresponding to the second sliding side closing fixing portion of the second insulator portion. When the sliding side closed fixing portion is provided and the fixed component in the open state is slid to the closed state, the claw portion of the fixed sliding fixing portion of the fixing component is the second sliding portion of the second insulator portion. At the same time as fitting to the dynamic fixing portion, the fixed opening side closed fixing portion of the fixing component is fitted to the second opening side closing fixing portion of the second insulator portion, and the fixing sliding side closed fixing portion of the fixing component is fixed. The portion is characterized in that the portion is fitted to the second sliding side closed fixing portion of the second insulator portion.

According to a third aspect of the present invention, a second opening-side detection mounting portion for mounting an opening-side closed-fixing detection portion is provided in the vicinity of the second opening-side closed-fixing portion of the second insulator portion, and the second-opening-side detection is provided. When the open-side closed / fixed detection portion is attached to the mounting portion and the fixed component in the open state is slid to the closed state, the claw portion of the fixed sliding / fixing portion of the fixed component is the second insulator portion. When the fixed opening side closed fixing portion of the fixing component is fitted to the second opening side closing fixing portion of the second insulator portion at the same time as fitting to the second sliding fixing portion of the above, the fixing component is fixed. The open-side closed-fixed portion comes into contact with the open-side closed-fixed detection portion to detect the closed state.

According to the fourth aspect of the present invention, a second opening-side detection mounting portion for mounting the opening-side closed-fixing detection portion is provided in the vicinity of the second opening-side closed-fixing portion of the second insulator portion, and the second insulator portion is provided. A second sliding-side detection mounting portion for mounting the sliding-side closed-fixing detection portion is provided in the vicinity of the second sliding-side closed-fixing portion, and an opening-side closed-fixing detection portion is provided in the second opening-side detection mounting portion. When the sliding side closed fixing detection part is attached to the second sliding side detection mounting part and the fixed part in the open state is slid to the closed state, the claw part of the fixed sliding fixing part of the fixing part Fits into the second sliding fixing portion of the second insulator portion, and at the same time, when the fixing opening side closed fixing portion of the fixing component fits into the second opening side closed fixing portion of the second insulator portion. In addition, the fixed opening side closed fixing portion of the fixing component contacts the opening side closed fixing detection portion to detect the closed state, and at the same time, the fixed sliding side closed fixing portion of the fixing component is the second insulator portion. When fitted to the second sliding-side closed / fixed portion, the fixed sliding-side closed / fixed portion of the fixing component comes into contact with the sliding-side closed / fixed detection portion to detect the closed state.

The power meter according to claim 5 of the present invention is detected by the current detection device according to any one of claims 1 to 4, a voltage detection unit that detects a voltage generated in a conductor, and the current detection device. It is characterized by including a power calculation unit for calculating electric power or electric power amount based on the generated current and the voltage detected by the voltage detection unit.

According to the first aspect of the present invention, as compared with the current product, when the current detection device is attached to the conductor, the fixing component can be securely fixed by sliding, so that the reliability can be improved.

According to the second aspect of the present invention, as compared with the first aspect, the fixed parts have a plurality of closed fixing portions, and the fixing parts can be fixed by sliding the fixing parts at a plurality of places, so that the reliability is further improved. be able to.

According to the third aspect of the present invention, as compared with the first and second claims, the detection at the time of closing and fixing can be performed, so that it can be recognized that the invention is securely fixed, and the reliability can be improved.

According to the fourth aspect of the present invention, as compared with the third aspect, since a plurality of closed and fixed portions can be detected at the time of closing and fixing, it is possible to recognize that the closed and fixed portions are fixed more reliably, so that the reliability can be improved.

According to the invention of claim 5, it is possible to realize a watt-hour meter using the current detection device mentioned in claims 1 to 4, and the current detection device can be reliably installed when the watt-hour meter is assembled. In addition to being able to confirm that the watt-hour meter is installed, even if the current detector should come off due to vibration or shock that occurs from the shipment of the watt-hour meter to the installation work by the customer, the disconnection is detected and the display unit is displayed. It is also possible to display an abnormality with and notify the outside by a communication device installed separately.

It is an assembly perspective view of the current detection apparatus which concerns on 1st Embodiment of this invention. It is an assembly sectional view of the current detection apparatus which concerns on 1st Embodiment of this invention. It is an exploded perspective view of the current detection apparatus which concerns on 1st Embodiment of this invention. It is an assembly perspective view of the current detection apparatus which concerns on 2nd Embodiment of this invention. It is an assembly sectional view of the current detection apparatus which concerns on 2nd Embodiment of this invention. It is an exploded perspective view of the current detection apparatus which concerns on 2nd Embodiment of this invention. It is a perspective view and the assembly sectional view of the current detection apparatus which concerns on 3rd Embodiment of this invention. It is a perspective view and the assembly sectional view of the current detection apparatus which concerns on 4th Embodiment of this invention. It is a block diagram of the electric energy meter which concerns on 5th Embodiment of this invention.

Hereinafter, the current detection device and the watt-hour meter according to the embodiment of the present invention will be described in detail with reference to the drawings.

(First Embodiment)
1 (a) to 1 (d) are assembly perspective views of the current detection device according to the first embodiment of the present invention. 2 (a) to 2 (c) are assembly cross-sectional views of the current detection device according to the first embodiment of the present invention. 3 (a) to 3 (b) are exploded perspective views of the current detection device according to the first embodiment of the present invention.

1 (a) to 1 (d) and 2 (a) to 2 (c) show that the second insulator portion 5A is vertically slid and opened in a direction away from the first insulator portion 1A. In this state, the conductor 10 is inserted into the central portion, the second insulator portion 5A is slid in the direction (longitudinal direction) closer to the first insulator portion 1A, and then the fixed component 6A is combined with the second insulator portion 5A. A series of mounting procedures up to the mated state are shown.

The current detection device includes a first magnetic material unit 2A, a second magnetic material unit 4A, a current detection unit 3A, a first insulator unit 1A, a second insulator unit 5A, and a fixed component 6A.

The conductor 10 is made of a conductive metal such as iron or copper. The conductor 10 generates a magnetic field when a load current, which is a measured current, flows.

As shown in FIG. 2A, the first magnetic material portion 2A is composed of a U-shaped magnetic material core, and is formed around the conductor 10 on a plane orthogonal to the direction of the measured current flowing through the conductor 10. It is arranged so as to surround and form a part of a magnetic circuit.

The second magnetic material portion 4A is also composed of a U-shaped magnetic material core, is arranged so as to face the first magnetic material portion 2A, and has a surface orthogonal to the direction of the measured current flowing through the conductor 10. 1 The magnetic material portion 2A and the magnetic material portion 2A are arranged so as to surround the periphery of the conductor 10 to form a part of the magnetic circuit.

The current detection unit 3A is composed of, for example, a magnetic sensor, is arranged in the magnetic path of a magnetic circuit formed by the first magnetic material unit 2A and the second magnetic material unit 4A, and generates a magnetic field generated by a current flowing through the conductor 10. To detect.

The first insulator portion 1A is made of, for example, a resin, and the second insulator portion 5A is slid and fixed in the vertical direction. It has an insulated sliding portion 1Ab and a first fixed sliding portion 1Ac.

The first magnetic body mounting portion 1Aa is composed of a U-shaped recess, and mounts the U-shaped first magnetic body portion 2A. The first insulating sliding portion 1Ab is formed of a convex portion, and is fitted into a second insulating sliding portion 5Ac formed of a vertically long hole portion of the second insulating portion 5A shown in FIG. 1 and slides in the vertical direction. The first fixed sliding portion 1Ac is formed of a convex portion, and slides in the lateral direction in contact with the fixed sliding portion 6Aa formed of a horizontally long hole portion of the fixed component 6A.

The second insulator portion 5A is also made of, for example, a resin and is arranged so as to face the first insulator portion 1A. As shown in FIG. 3A, the second current detection mounting portion 5Aa and the second magnetic material mounting portion It has 5Ab, a second insulating sliding portion 5Ac, a second sliding fixing portion 5Ad, and a second opening side closed fixing portion 5Ae.

As shown in FIG. 3A, the second magnetic material mounting portion 5Ab is formed of a U-shaped recess, and the second magnetic material portion 4A is mounted. The second current detection mounting portion 5Aa is located on the right end convex portion of the second magnetic body portion 4A mounted on the second magnetic body mounting portion 5Ab, and mounts the current detection unit 3A.

The second insulating sliding portion 5Ac is composed of a vertically long hole portion, fits into the first insulating sliding portion 1Ab of the first insulator portion 1A, and slides in the vertical direction. The second sliding fixing portion 5Ad is composed of a concave portion, and is fitted to the claw portion 6Ac at the tip of the fixed sliding fixing portion 6Ab of the fixing component 6A to fix the sliding. The second opening-side closed fixing portion 5Ae is formed of a convex portion, and is fitted and fixed to the fixed opening-side closed fixing portion 6Ad formed of the concave portion of the fixing component 6A shown in FIGS. 2 (c) and 3 (b).

The fixing component 6A is attached to the first insulator portion 1A and has a fixed sliding portion 6Aa, a fixed sliding fixing portion 6Ab, and a fixed opening side closed fixing portion 6Ad.

The fixed sliding portion 6Aa is formed of a horizontally long hole portion, is fitted to the first fixed sliding portion 1Ac formed of a convex portion of the first insulator portion 1A, and slides in the lateral direction. The fixed sliding fixing portion 6Ab has a snap-fit structure having a claw portion 6Ac at the tip thereof, and is fitted to a second sliding fixing portion 5Ad formed of a recess of the second insulator portion 5A to fix the sliding. .. The fixed opening side closed fixing portion 6Ad is formed of a concave portion, and is fitted and fixed to the second opening side closed fixing portion 5Ae formed of a convex portion of the second insulator portion 5A.

Next, the operation of the current detection device of the first embodiment configured in this way will be described. First, as shown in FIG. 1A, the second insulator portion 5A is slid in the vertical direction in the direction away from the first insulator portion 1A to open the open state. Next, as shown in FIGS. 1 (b) and 2 (a), after inserting the conductor 10 into the central portion, the second insulator portion 5A is slid in the vertical direction in a direction approaching the first insulator portion 1A. Move it to the closed state.

After that, the fixing part 6A is slid laterally, and as shown in FIG. 2C, the claw portion 6Ac of the fixed sliding fixing portion 6Ab of the fixing part 6A is the second sliding of the second insulator portion 5A. It fits into the fixed portion 5Ad.

At the same time as this operation, the fixed opening side closed fixing portion 6Ad of the fixing component 6A is fitted into the second opening side closed fixing portion 5Ae of the second insulator portion 5A. Thereby, the current detection device can be fixed.

When this current detection device is removed from the conductor 10, the claw portion 6Ac of the fixed sliding fixing portion 6Ab of the fixing component 6A is lifted, and the fixing component 6A is fixed from the second sliding fixing portion 5Ad of the second insulator portion 5A. The claw portion 6Ac of the sliding fixing portion 6Ab is removed and slid laterally.

After that, the current detection device can be removed from the conductor 10 by sliding the second insulator portion 5A in the vertical direction in the direction away from the first insulator portion 1A to open the conductor portion 10.

Further, in the assembled state, the current detection device is difficult to remove by covering the circumference of the claw portion 6Ac of the fixed sliding fixing portion 6Ab of the fixing component 6A with the second insulator portion 5A, so that the current detection device cannot be easily removed. It is also possible to.

As described above, according to the current detection device of the first embodiment, when the current detection device is attached to the conductor 10, the current detection device can be reliably fixed by fixing the fixing component 6A by sliding, as compared with the current product. Because it can be done, reliability can be improved.

(Second embodiment)
4 (a) to 4 (d) are assembly perspective views of the current detection device according to the second embodiment of the present invention. 5 (a) to 5 (c) are assembly sectional views of the current detection device according to the second embodiment of the present invention. 6 (a) to 6 (b) are exploded perspective views of the current detection device according to the second embodiment of the present invention.

4 (a) to 4 (d) and FIGS. 5 (a) to 5 (c) show that the second insulator portion 5B is vertically slid open in a direction away from the first insulator portion 1B. In this state, the conductor 10 is inserted into the central portion, the second insulator portion 5B is slid in a direction closer to the first insulator portion 1B, and then the fixed component 6B is fitted with the second insulator portion 5B. A series of mounting procedures up to is shown.

In the second embodiment, the second open side closed fixing portion 5Be1 of the second insulator portion 5B is, as shown in FIG. 5A, the first insulator portion 1B and the second insulator portion in the open state. 5B is provided at a position where the conductor 10 can be inserted at a distance.

Further, in the configuration of the first embodiment, as shown in FIG. 6A, a second sliding side closed fixing portion 5Be2 formed of a recess is provided in the second insulator portion 5B. Fixed sliding side closed fixing portion 6Bd2 having a convex portion formed at the tip of the fixing part 6B shown in FIG. 6B so as to be fitted to the second sliding side closed fixing portion 5Be2 of the second insulator portion 5B. Is provided. As shown in FIG. 6A, the first insulator portion 1B has a sliding portion 1Bd formed of a recess that fits into the fixed sliding side closed fixing portion 6Bd2 and slides the fixed sliding side closed fixing portion 6Bd2. Is provided.

Next, the operation of the current detection device of the second embodiment configured in this way will be described. First, as shown in FIG. 4A, the second insulator portion 5B is slid in the vertical direction in the direction away from the first insulator portion 1B to open the open state. Next, as shown in FIGS. 4 (b) and 5 (a), after the conductor 10 is inserted in the central portion, the second insulator portion 5B is slid in the vertical direction in a direction approaching the first insulator portion 1B. Move it to the closed state. After that, the fixing part 6B is slid laterally, and as shown in FIG. 5C, the claw portion 6Bc of the fixed sliding fixing portion 6Bb of the fixing part 6B is the second sliding of the second insulator portion 5B. It fits into the fixed portion 5Bd.

At the same time as this operation, as shown in FIG. 5 (c), the fixed opening side closed fixing portion 6Bd1 of the fixing component 6B is fitted with the second opening side closed fixing portion 5Be1 of the second insulator portion 5B, and the fixing component is fixed. The fixed sliding side closed fixing portion 6Bd2 of 6B can be fixed by fitting to the second sliding side closed fixing portion 5Be2 of the second insulator portion 5B.

As described above, according to the current detection device of the second embodiment, the fixed parts 6B and the second insulator portion 5B have a plurality of closed fixing portions as compared with the current detection device of the first embodiment, and the fixing parts are fixed parts. Since it is possible to fix a plurality of places by fixing the 6B by sliding, the reliability can be further improved.

(Third embodiment)
7 (a) is a perspective view of the current detection device according to the third embodiment of the present invention, and FIGS. 7 (b) to 7 (d) are assembly sectional views.

The current detection device according to the third embodiment is for detecting the closed state in the vicinity of the second opening side closed fixing portion 5Ce of the second insulator portion 5C in the current detecting device of the first embodiment. A second opening-side detection mounting portion 5Cf for mounting the opening-side closed fixing detection portion 301 is provided. The opening-side closed fixing detection unit 301 is inserted into the second opening-side detection mounting portion 5Cf and the groove portion of the second insulator portion 5C, and current is detected from the vicinity of the second opening-side closed-fixing portion 5C of the second insulator portion 5C. It extends to the vicinity of the portion 3C.

Next, the operation of the current detection device of the third embodiment configured in this way will be described. First, when the fixed part 6C in the open state is slid laterally to be closed as shown in FIG. 7D, the claw portion 6Cc of the fixed sliding fixed portion 6Cb of the fixed part 6C is second insulated. It fits into the second sliding fixing portion 5Cd of the body portion 5C. At the same time as this operation, when the fixed opening side closed fixing portion 6Cd of the fixing part 6C is fitted to the second opening side closed fixing portion 5Ce of the second insulator portion 5C, the fixed opening side closed fixing portion 6Cd of the fixing part 6C Can come into contact with the open-side closed-fixed detection unit 301 to detect the closed state.

As described above, according to the current detection device of the third embodiment, the current detection device can be detected at the time of closing and fixing as compared with the current detection device of the first embodiment, so that it is recognized that the current detection device is surely fixed. Therefore, reliability can be improved.

(Fourth Embodiment)
8 (a) is a perspective view of the current detection device according to the fourth embodiment of the present invention, and FIGS. 8 (b) to 8 (d) are assembly sectional views.

The current detection device according to the fourth embodiment detects the closed state in the vicinity of the second opening side closed fixing portion 5De1 of the second insulator portion 5D in the current detection device according to the second embodiment. A second opening-side detection and mounting unit 5Df1 for mounting the opening-side closed and fixed detection unit 401 is provided.

Further, a second sliding side detection mounting portion 5Df2 for mounting the sliding side closed / fixed detecting portion 402 for detecting the closed state is provided in the vicinity of the second sliding side closed / fixing portion 5De2 of the second insulator portion 5D. ing. Then, the opening side closed fixing detection unit 401 is inserted into the second opening side detection mounting portion 5Df1 and the groove portion, and the sliding side closed fixing detection unit 402 is inserted into the second sliding side detection mounting portion 5Df2 and the groove portion. It extends to the vicinity of the current detection unit 3D.

Next, the operation of the current detection device of the fourth embodiment configured in this way will be described. First, when the fixed part 6D in the open state is slid laterally to be closed as shown in FIG. 8D, the claw portion 6Dc of the fixed sliding fixed portion 6Db of the fixed part 6D is second insulated. It fits into the second sliding fixing portion 5Dd of the body portion 5D.

At the same time as this operation, when the fixed opening side closed fixing portion 6Dd1 of the fixing part 6D is fitted to the second opening side closed fixing portion 5De1 of the second insulator portion 5D, the fixed opening side closed fixing portion 6Dd1 of the fixing part 6D Can come into contact with the open-side closed-fixed detection unit 401 to detect the closed state.

At the same time as this operation, when the fixed sliding side closed fixing portion 6Dd2 of the fixed part 6D is fitted to the second sliding side closed fixing portion 5De2 of the second insulator portion 5D, the fixed sliding side closed portion 6D is closed. The fixed portion 6Dd2 can come into contact with the sliding side closed fixed detecting portion 402 to detect the closed state.

In the current detection device of the fourth embodiment, an example in which the closed-fixed portion, the detection mounting portion, and the closed-fixed detection unit are provided at two locations has been described, but the closed-fixed portion, the detection mounting portion, and the closed-fixed detection unit are described. Two or more places may be provided.

(Fifth Embodiment)
FIG. 9 is a block diagram of a watt-hour meter according to a fifth embodiment of the present invention. The watt-hour meter according to the fifth embodiment of the present invention is a watt-hour meter using the current detection device according to the first to fourth embodiments described above. This watt-hour meter includes a current detection device 51, a voltage detection unit 52, a power calculation unit 53, a display unit 54, a closed / fixed detection unit 55, a recording unit 56, and a communication device 57.

As the current detection device 51, any one of the current detection devices according to the first to fourth embodiments described above is used. The current detection device 51 detects the working current (AI) used in the load of the consumer, converts it into an electric signal corresponding to the working current, and outputs it.

The voltage detection unit 52 is a part that detects the voltage of the system under test, and is composed of a voltage divider resistor such as a voltage transformer or an attenuator, and determines the working voltage (VI) used by the load of the consumer. It detects it, converts it to a low-level voltage signal that is directly proportional to the working voltage, and outputs it.

The power calculation unit 53 calculates the amount of power based on the current flowing through the conductor 10 detected by the current detection device 51 and the voltage of the conductor 10 detected by the voltage detection unit 52. Specifically, the power calculation unit 53 is composed of a digital multiplication circuit, a DSP (digital signal processor), or the like, and the signal related to the current used (AI) output from the current detection device 51 and the voltage detection unit 52. It is multiplied by the output signal related to the working voltage (VI) and converted into data (AI / VI) that is directly proportional to the power used by the consumer.

Further, the power calculation unit 53 edits and outputs the calculation result of the data (AI / VI) directly proportional to the power consumption as the usage amount data. Here, the usage amount data refers to data related to the power consumption of the consumer, such as the total cumulative power consumption used by the load of the consumer and the time zone usage for each time zone.

This usage amount data is recorded in a recording unit 56 configured by a record holding device or the like, and the usage amount data is displayed on a display unit 54 configured by a liquid crystal display or the like. Further, the closed / fixed detection unit 55 also records the open / closed state of the current detection device 51 in the recording unit 56. The usage data and the open / closed state record recorded in the recording unit 56 can be notified to the center device 58 by the communication device 57.

As described above, according to the watt-hour meter according to the fifth embodiment of the present invention, it can be confirmed that the current detection device is securely attached when the current detection device is assembled at the time of assembling the watt-hour meter. Even if the current detection device should come off during use by the consumer, the disconnection of the current detection device may be detected and an abnormality may be displayed on the display unit, or the communication device 57 may notify the center device 58 of the occurrence of the abnormality. can do.

1A to 1D 1st Insulator 1Aa to 1Ba 1st Magnetic Material Mounting 1Ab to 1Db 1st Insulating Sliding Part 1Ac to 1Dc 1st Fixed Sliding Part 2A to 2D 1st Magnetic Material 3A to 3D Current Detection Unit 4A ~ 4D 2nd magnetic body part 5A ~ 5D 2nd insulator part 5Aa ~ 5Da 2nd current detection mounting part 5Ab ~ 5Db 2nd magnetic body mounting part 5Ac ~ 5Dc 2nd insulating sliding part 5Ad ~ 5Dd 2nd sliding fixing 2Ae, 5Be1, 5Ce, 5De1 2nd opening side closed fixing part 5Cf, 5Df1 2nd opening side detection mounting part 5Be2, 5De2 2nd sliding side closed fixing part 5Df2 2nd sliding side detection mounting part 6A-6D fixing part 6Aa to 6Da Fixed sliding part 6Ab to 6Db Fixed sliding fixed part 6Ac to 6Dc Fixed claw part 6Ad, 6Bd1, 6Cd, 6Dd1 Fixed opening side closed fixing part 6Bd2, 6Dd2 Fixed sliding side closed fixing part 10 Conductor 51 Current detector 52 Voltage detection unit 53 Power calculation unit 54 Display unit 55 Closed / fixed detection unit 56 Recording unit 57 Communication device 58 Center device 301, 401 Open side closed / fixed detection unit 402 Sliding side closed / fixed detection unit

Claims (5)

A first magnetic material portion arranged so as to surround the conductor and forming a part of a magnetic circuit on a plane orthogonal to the direction of the measured current flowing through the conductor, and a second magnetic material portion arranged opposite to the first magnetic material portion. Magnetic material part and
A current detector located in the magnetic path of the magnetic circuit to detect a magnetic field,
A first magnetic body mounting portion for mounting the first magnetic material portion, a first insulating sliding portion, a first insulating portion having a first fixed sliding portion, and a first insulating portion.
A second current detection mounting portion for mounting the current detection portion, a second magnetic material mounting portion for mounting the second magnetic material portion, and a first insulating sliding portion for sliding by fitting into the first insulating sliding portion of the first insulator portion. 2 Insulated sliding part, 2nd sliding fixing part, 2nd insulating part having 2nd opening side closed fixing part,
A fixed sliding portion that fits into the first fixed sliding portion of the first insulator portion and slides, and a tip that fits into the second sliding fixing portion of the second insulator portion to fix the sliding. It is provided with a fixed sliding fixing portion having a snap-fit structure having a claw portion, and a fixing component having a fixed opening side closed fixing portion that is fitted and fixed to the second opening side closed fixing portion of the second insulator portion. ,
The second insulator portion is slid to open in a direction away from the first insulator portion, the conductor is inserted into the central portion, and then the second insulator portion approaches the first insulator portion. After sliding the portion to close the closed state, the fixing component is slid so that the claw portion of the fixed sliding fixing portion of the fixing component fits into the second sliding fixing portion of the second insulator portion. At the same time, the current detection device is characterized in that the fixed opening side closed fixing portion of the fixing component is fitted to the second opening side closed fixing portion of the second insulator portion. A second sliding side closed fixing portion is provided in the second insulator portion, and a fixed sliding side closed fixing portion is provided in the fixing component corresponding to the second sliding side closed fixing portion of the second insulator portion. ,
When the fixed component in the open state is slid to the closed state, the claw portion of the fixed sliding fixing portion of the fixing component is fitted to the second sliding fixing portion of the second insulator portion at the same time. The fixed opening side closed fixing portion of the fixed component fits into the second opening side closed fixing portion of the second insulator portion, and the fixed sliding side closed fixing portion of the fixing component is the second insulator portion. The current detecting device according to claim 1, wherein the current detecting device is fitted to the second sliding side closed fixing portion. A second opening-side detection mounting portion for attaching the opening-side closed-fixing detection portion is provided in the vicinity of the second opening-side closed-fixing portion of the second insulator portion, and the opening-side closed-fixing portion is provided on the second opening-side detection mounting portion. Attach the detector,
When the fixed component in the open state is slid to the closed state, the claw portion of the fixed sliding fixing portion of the fixing component is fitted to the second sliding fixing portion of the second insulator portion, and at the same time, at the same time. When the fixed opening side closed fixing portion of the fixed component is fitted to the second opening side closed fixing portion of the second insulator portion, the fixed opening side closed fixing portion of the fixing component is the opening side closed fixing detection portion. The current detection device according to claim 1, wherein the closed state is detected by contacting with the current. A second opening-side detection mounting portion for mounting the opening-side closed-fixing detection portion is provided in the vicinity of the second opening-side closed-fixing portion of the second insulator portion, and the second sliding-side closed-fixing portion of the second insulator portion is provided. A second sliding side detection mounting portion for mounting the sliding side closed / fixed detection portion is provided in the vicinity of the portion, and an opening side closed / fixed detection portion is provided in the second opening side detection mounting portion.
When the sliding side closed / fixed detection part is attached to the second sliding side detection mounting part and the fixed part in the open state is slid to the closed state, the claw part of the fixed sliding / fixing part of the fixed part becomes. When the fixed opening side closed fixing portion of the fixing component is fitted to the second opening side closed fixing portion of the second insulator portion at the same time as fitting to the second sliding fixing portion of the second insulator portion. The fixed opening side closed fixing portion of the fixing component contacts the opening side closed fixing detection portion to detect the closed state, and at the same time, the fixed sliding side closed fixing portion of the fixing component is the second insulator portion. (2) The claim is characterized in that, when fitted to the sliding side closed / fixed portion, the fixed sliding side closed / fixed portion of the fixing component comes into contact with the sliding side closed / fixed detection portion to detect a closed state. 2. The current detector according to 2. The current detection device according to any one of claims 1 to 4,
A voltage detector that detects the voltage generated in the conductor,
A watt-hour meter including a power calculation unit that calculates power or electric energy based on a current detected by the current detection device and a voltage detected by the voltage detection unit.

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