KR20090062915A - Electric meter shared with circuit breaker - Google Patents

Abstract

A battery circuit breaker integrated electronic type watt-hour-meter is provided, which minimizes the occupied area and makes the installation work convenient. A battery circuit breaker integrated electronic type watt-hour-meter(1) comprises the battery circuit breaker part, current detectors(16,16a), the voltage detecting portion(15), and the controller(2). The battery circuit breaker part comprises the opening and closing device(3), the crossbar(18), and the coil assembly(17). The coil assembly rotates to trigger the crossbar when it is magnetized. The current detector detects the current value flowing on the circuit. The voltage detecting portion detects the voltage value on the circuit. The controller produces the amount of used electric power.

Description

Electronic meter with integrated circuit breaker {ELECTRIC METER SHARED WITH CIRCUIT BREAKER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic power meter, and more particularly, to an electronic power meter integrated with a circuit breaker.

In general, the installation of an electronic electricity meter and a circuit breaker (also called a wiring breaker) in a power consumer is first performed by fixing a household distribution box (aka distribution panel) to an entrance side wall such as a household entrance, and then the distribution box. Fix the electricity meter inside. Next, the branched power line is connected to the input terminal of the electricity meter, and a circuit breaker is fixedly installed in the distribution box. Next, the work is completed by connecting the load stage of the electricity meter and the input terminal (power side terminal) of the circuit breaker with a power line or a busbar.

However, as described above, the installation method of fixing the electronic electricity meter and the circuit breaker separately in the distribution box and connecting them with wires has a problem of occupying a lot of space in the distribution box to install two electric devices in the distribution box, and in a narrow distribution box. Electrical wiring of these electrical devices is not only an easy task, but also requires a considerable time.

On the other hand, as a solution to the problems of the prior art has been proposed a design of the designation "electronic wattmeter with a circuit breaker function" according to the Korean Utility Model Registration No. 20-0354144. The design of the circuit breaker is installed on the upper part of the circuit breaker at the bottom based on the noise removing shield plate, and the power line is connected to the input terminal (power side terminal) and the output terminal (load side terminal) of the circuit breaker. On the other hand, the current and voltage measurement signals to the lower electronic power measurement has been proposed through a current transformer and a displacer connected thereto installed at the input terminal or output terminal of the circuit breaker.

However, the above design is a structure in which a circuit breaker operation part for an abnormal current conduction monitoring function on a circuit and an operation part of a wattmeter for metering power consumption operate and are controlled independently of each other, and the wattmeter and the circuit breaker are simply stored in one enclosure. Only arranged up and down, each independently operate and occupy an independent installation space, there is a problem that there is no search for the efficiency of this independent configuration.

Accordingly, the present invention solves the problems of the prior art, in the breaker-integrated electric wattmeter, the control unit is configured as a common control unit of the circuit breaker and the electronic wattmeter, so that the integrated structure of the wattmeter and the circuit breaker is more efficiently improved. It aims to provide a breaker-integrated electronic watt-hour meter that can minimize the occupied area, simplify the installation work and maximize the reduction of manufacturing cost.

The object of the present invention, in the circuit breaker integrated electronic power meter,

An opening / closing mechanism for driving the movable contactor to an energized position contacting the fixed contactor and a cutoff position separated from the fixed contactor, a cross bar that rotates to trigger the opening / closing mechanism to the cutoff position; A circuit breaker section having a coil assembly (COIL ASSEMBLY) that rotationally drives to trigger the cross bar when magnetized;

A current detector for detecting a current value flowing on the circuit;

A voltage detector for detecting a voltage value on a circuit;

A common control unit of the circuit breaker and the electronic power meter, which calculates the amount of power used by integrating the current value from the current detector and the voltage value from the voltage detector, and sets the current value from the current detector to a predetermined rating. Compared to the current value can be achieved by providing a circuit breaker integrated electronic power meter according to the invention, characterized in that it comprises a control unit for outputting a cutoff control signal for magnetizing the coil assembly when an abnormal current occurs on the circuit.

According to the present invention, the control unit is configured as a common control unit of the circuit breaker and the electronic power meter, thereby improving the integrated structure of the power meter and the circuit breaker more efficiently, thereby minimizing and installing the occupied area. It is possible to maximize the simplicity of work and the reduction of manufacturing cost.

The object of the present invention and the constituent means of the present invention and the resulting effects thereof will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying drawings.

First, a partial exploded perspective view showing a common control unit in an exploded state in order to show a configuration of a circuit breaker integrated electronic power meter according to the present invention will be described with reference to FIG. 1.

As shown in FIG. 1, the integrated circuit breaker integrated electronic power meter 1 includes a circuit breaker unit 3, 18, 17, and a common controller 2. The circuit breaker integrated electronic wattmeter 1 according to the present invention also detects a voltage value (line voltage) on a circuit and a current detector 16, 16a and reference numeral 43 of FIG. 2 for detecting a current value flowing on a circuit. And a voltage detector (see reference numeral 42 in Fig. 2).

The current detectors 16, 16a and reference numeral 43 of FIG. 2 are provided with a current transformer 16 which outputs a secondary output signal proportional to the current (used current) flowing through the power line (generation lead wire). The central processing unit can recognize the current transformer output signal line 16a for transmitting the secondary output signal from the current transformer 16 and the second output signal transmitted from the current transformer 16 through the current transformer output signal line 16a. And a conversion input unit (see reference numeral 43 in FIG. 2) for converting and providing a digital voltage signal.

The voltage detector 15 and the reference numeral 42 of FIG. 2 include a potential transformer (not shown) for detecting a voltage value (line voltage) on a circuit and outputting an output signal representing the voltage value, and a displacement output signal. Converts the output signal transmitted from the voltage detecting part output signal line 15 and the shifter (not shown) through the voltage detecting part output signal line 15 into a digital voltage signal for the central processing unit to recognize. And a conversion input unit (see reference numeral 42 in FIG. 2) to provide.

The conversion input sections 42 and 43 may be composed of, for example, an amplifier circuit and an analog-digital converter circuit.

  The circuit breaker parts 3, 18, and 17 are movable contactors (not shown as movable contact points for opening and closing circuits) and fixed contactors (fixed contact points for opening and closing circuits as contact points corresponding to movable contact points). ) Opening and closing mechanism (3) for driving to the cutoff position separated from the fixed contactor, and a cross bar (TRIGGER) for triggering to drive the open / close mechanism (3) to the cutoff position (CROSS BAR) 18 and a coil assembly 17 which is rotationally driven to trigger the crossbar when magnetized.

As is well known, the opening / closing mechanism 3 includes a trip spring which is a driving source of a driving force for driving the movable contactor to the cut-off position, a latch mechanism for storing and preserving elastic energy of the tripping spring, and a movable contactor. It consists of a shaft (shaft), the link (links) and the like for supporting.

The cross bar 18 is a roughly bar-shaped member that rotates by driving the coil assembly 17 to release the latch mechanism of the opening / closing mechanism 3, and the cross bar 18 is used to release the latch mechanism of the cross bar 18. This causes the trip spring to restrain the elastic energy to operate the opening and closing mechanism 3 to the trip (circuit breaking) position.

As is well known, the coil assembly 17 is a coil that magnetizes and generates a suction force when energizing an abnormal current on a circuit, and an armature that is rotated by a suction force from the coil to rotate and drive the cross bar 18. armature).

The control unit 2 is a common control unit of the circuit breaker and the electronic watt-hour meter. The control unit 2 includes a current value from the current detection unit 16 and the reference numeral 43 in FIG. The amount of power used is calculated by integrating the voltage values. In addition, the control unit 2 compares the current value from the current detection unit 16 and reference numeral 43 of FIG. 2 with a preset rated current value to block the magnetization of the coil assembly 17 when an abnormal current occurs in the circuit. Output the signal.

The control unit 2 is preferably composed of one common printed circuit board.

According to a preferred feature of the present invention, the circuit breaker part 3, 18, 17 and the control part 2, that is, the printed circuit board, may be layered, so that the thickness of the circuit breaker integrated electronic power meter 1 can be minimized. In other words, they are arranged horizontally (horizontally) and serially (continuously) rather than vertically.

Meanwhile, FIG. 2 is a block diagram showing the electrical configuration and connection of the entire controller in the circuit breaker integrated electronic wattmeter according to the present invention. Referring to FIG. 2, the electrical configuration and operation of the circuit breaker integrated electronic wattmeter according to the present invention. This is as follows.

In FIG. 2, the control unit 2 includes an error output unit 44, a screen display unit 21, and a central processing unit 41.

The error output unit 44 is a means for transmitting the metering data of the amount of power used by the CPU 41 and calculated. When the pulse output type is configured as a pulse output type, the error output unit 44 calculates and provides the amount of power used by the CPU 41. It can be composed of a pulse generation and output circuit for generating and outputting a pulse signal corresponding to (for example, one pulse represents the amount of power used of 1 kilowatt), and in the case of a digital communication type RS-232C serial communication converter and RS-232C serial communication port (PORT).

The screen display unit 21 is preferably a liquid crystal display as a means for displaying the amount of power used.

The central processing unit 41 includes the error output unit 44, the screen display unit 21, the current detection unit (see numerals 16, 16a of FIG. 1 and 43 of FIG. 2), and the voltage detection unit (FIG. 1). And 15 are electrically connected to the coil assembly 17 to calculate the amount of power used by integrating the current value from the current detector and the voltage value from the voltage detector, Compares the current value from the current detection unit with a predetermined rated current value and emits a cutoff control signal to magnetize the coil assembly 17 when an abnormal current occurs in the circuit, and the amount of power used is displayed through the screen display unit 21. While controlling to display, the reading data of the amount of power used is transmitted to the error output section 44.

On the other hand, referring to Figure 2 will be described the operation of the circuit breaker integrated electronic power meter according to the present invention configured as described above.

The circuit breaker-integrated electronic wattmeter according to the present invention is installed between the power supply side terminal 12a and the load side terminal 11 of the circuit breaker (as shown in FIG. 1 more specifically to surround the load side terminal 11). The current transformer 16 detects the secondary output signal proportional to the amount of current flowing through the circuit, i.e., the power line (the amount of current flowing into the power load in the household). The conversion input unit 43 then converts the secondary output signal into a digital voltage signal so that the central processing unit 41 can recognize it.

The non-shown shifter of the voltage detector (see reference numeral 15 of FIG. 1 and reference numeral 42 of FIG. 2) detects a voltage value (line voltage) on a circuit, outputs an output signal representing the voltage value, and converts the input unit 42. Is converted into a digital voltage signal and provided to the central processing unit 41 so that the central processing unit 41 can recognize the output signal.

The central processing unit 41 calculates the amount of power used by integrating the current value from the current detector (see 15 in FIG. 1 and 42 in FIG. 2) and the voltage value from the voltage detector, and detects the current. By comparing the current value from the negative value with a preset rated current value, a cutoff control signal for magnetizing the coil assembly 17 when an abnormal current is generated in the circuit is generated, and the power consumption is controlled to be displayed through the screen display unit 21. At the same time, the meter reading data of the amount of power used is transmitted to the error output unit 44.

Accordingly, when the coil assembly 17 is magnetized by the cutoff control signal from the central processing unit 41 when an abnormal current occurs in the circuit, the armature in the coil assembly 17 moves and is installed on its movement path. The rotation of the cross bar 18 is performed, and thus, the rotation of the cross bar 18 releases the restraint of the latch mechanism of the opening / closing mechanism (symbol 3 in FIG. Is disconnected from the fixed contact and the circuit is cut off (trip).

In this case, the amount of power used by the central processing unit 41 is displayed through the screen display unit 21, and the error output unit 44 is used to connect, for example, a communication medium between a remote meter reading terminal and a power line or a serial communication line, not shown. It is delivered to a meter reading server in a remote meter reading center (eg apartment management office).

3 is a perspective view showing another embodiment of some components in a circuit breaker integrated electronic power meter according to the present invention.

3 shows a shunt 16-1 as a means for detecting the amount of current on the circuit, provided in place of the current transformer 16, and both input ends 16-1a and 16- of the shunt 16-1. 1b is connected between the power supply side terminal 12a and the load side terminal 11, and the output terminals 16-1c and 16-1d of the shunt 16-1 are electrically connected to the conversion input unit 43. Install to be connected. Therefore, the shunt 16-1 outputs a voltage signal proportional to the amount of current flowing between the power supply terminal 12a and the load terminal 11. The subsequent operation is as described above.

1 is a partially exploded perspective view showing a common control in an exploded state in order to show the configuration of a circuit breaker integrated electronic power meter according to the present invention;

2 is a block diagram showing the electrical configuration and connection of the entire control unit in the electronic circuit breaker integrated power meter according to the present invention,

3 is a perspective view showing another embodiment of some components in a circuit breaker integrated electronic power meter according to the present invention.

* Explanation of symbols on the main parts of the drawings

1: electronic circuit breaker integrated

2: common control unit 3: switchgear

11: Load side terminal 12: Power side terminal block

12a: power supply terminal

13: open and close handle 15: voltage detection unit output signal line

16: current transformer 16a: current transformer output signal line

17: coil assembly 17a: coil assembly output signal line

18: cross bar 19: enclosure

21: Display 22: Current transformer output connector

23: power connector 24: coil assembly output connector

42: conversion input section 43: conversion input section

41: central processing unit 44: error output unit

Claims (6)

In the circuit breaker integrated electronic power meter, An opening / closing mechanism for driving the movable contactor to an energized position contacting the fixed contactor and a cutoff position separated from the fixed contactor, a cross bar that rotates to trigger the opening / closing mechanism to the cutoff position; A circuit breaker section having a coil assembly (COIL ASSEMBLY) that rotationally drives to trigger the cross bar when magnetized; A current detector for detecting a current value flowing on the circuit; A voltage detector for detecting a voltage value on a circuit; A common control unit of the circuit breaker and the electronic power meter, which calculates the amount of power used by integrating the current value from the current detector and the voltage value from the voltage detector, and sets the current value from the current detector to a predetermined rating. And a control unit for outputting a cutoff control signal for magnetizing the coil assembly when an abnormal current occurs in the circuit in comparison with the current value. The method of claim 1, The control unit, An error output unit which transmits meter reading data of the amount of power used; A screen display for displaying the amount of power used; And Electrically connected to the error output section, the screen display section, the current detector section, the voltage detector section, and the coil assembly, and integrates the current value from the current detector section with the voltage value from the voltage detector section. Calculate a current value from the current detection unit and compare the current value from the current detection unit with a preset rated current value to generate a cutoff control signal for magnetizing the coil assembly when an abnormal current occurs in the circuit, and display the amount of power used on the screen display unit. And a central processing unit for controlling and transmitting the meter reading data of the amount of power used to the error output unit. The method according to claim 1 or 2, And the control unit is installed on one printed circuit board. The method of claim 3, Wherein the circuit breaker portion and the printed circuit board are arranged horizontally and in series, rather than layered, so that thickness can be minimized.  The method of claim 1, The current detection unit, A current transformer for detecting a current value flowing on the circuit; And And a detection current input unit for converting and outputting a current value from the current transformer to a voltage value.  The method of claim 1, And the current detecting unit comprises a shunt (SHUNT) for detecting a current value flowing on a circuit as a voltage value.

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