JP2005308662A - Overcurrent alarm device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent unexpected breaking of a breaker by predicting the overloads of apparatuses, such as a number of game machines connected to a power source in a commercial facility, such as amusement centers. <P>SOLUTION: The overcurrent alarm device is arranged in a panel board H together with a master breaker and a number of branch breakers H1, H2 connected to the secondary side of the master breaker, which comprises current detecting means A1, A2 of outputting current-detecting signals, in response to output currents of the branch breakers respectively; a control device B configured separately from the panel board, which judges whether the current detecting signals exceed set current values to operate so as to output overcurrent detecting signals, when exceeding the set current values, and a display means C configured separately from the panel board and the control device, for displaying judgment outputs of the branch breakers respectively, in response to deciding of outputting of signals output from the control device. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an overcurrent alarm device that periodically monitors an energization current on the secondary side of a main breaker, issues an alarm when an overcurrent is detected, and displays an abnormal location.

  In an amusement center commercial facility equipped with a game machine, etc., as shown in Fig. 1, power is divided from a switchboard to a plurality of devices or devices such as game machines connected to a plurality of branch breaker circuits, and they are operated. Providing services to customers.

  In this type of commercial equipment, layout changes are frequently made, so the installation positions of the devices connected to the respective lines are not constant, and there are changes. Therefore, the current capacity may change due to the layout change. If each device is a device with a load variation such as a game machine, this is not known when the power supply wiring is connected, and the breaker works during operation, resulting in the machine power being turned off. This is very troublesome for commercial facilities and will hinder sales.

  Therefore, there is a need for a system that constantly monitors the power line and issues an alarm before the power is cut off when the breaker is about to fall.

  In the commercial facilities as described above, the service provider side wants to know the alarm and respond to it without notifying the customer. And you need to know which line is causing the problem.

Therefore, various overcurrent alarm devices have been developed so far, but all use current detectors such as current transformers and transducers with high unit prices for each branch breaker, Overall, the cost is very high. When a clamp-type current transformer or the like is used as a current detection sensor for existing wiring, the equipment becomes expensive. For example, there is an overcurrent alarm device disclosed in the following patent document as a device employing this type of current sensor.
[Patent Document] JP 2003-348718 A In this type of overcurrent alarm device, in general, only an alarm generator such as a speaker or the like that is integrally attached to the switchboard is separated from the switchboard. Therefore, it is difficult to implement various layouts for the device itself and enhance the alarm function.

Accordingly, one object of the present invention has been made in view of the problems requiring the prior art as described above, and is capable of implementing various layouts and alarming for predicting the possibility of overcurrent. It is an object of the present invention to provide an overcurrent alarm device that can greatly enhance the function.
In addition, another object of the present invention is that various layouts can be implemented, the alarm function for predicting the possibility of occurrence of overcurrent can be greatly enhanced, and the manufacturing cost can be greatly reduced. It is an object of the present invention to provide an overcurrent alarm device capable of exhibiting an alarm function that is possible and highly reliable.

  In order to achieve the above object, an overcurrent alarm device according to the invention of claim 1 is disposed on a switchboard together with a main breaker and a plurality of branch breakers connected to a secondary side thereof, and outputs an output current of each branch breaker. Current detection means that outputs a corresponding current detection signal, and whether or not the current detection signal exceeds the set current value and operates to output an overcurrent detection signal when the set current value is exceeded A control device configured separately from the switchboard, and separate from the switchboard and the control device for displaying the determination output of each branch breaker according to the determination output signal output from the control device It is characterized by comprising configured display means.

  The overcurrent alarm device according to the invention of claim 2 is arranged on the switchboard together with the main breaker and a plurality of branch breakers connected to the secondary side thereof, and outputs a current detection signal corresponding to the output current of each branch breaker. Current detection means made of an inexpensive device manufactured using a semiconductor and whether or not the current detection signal exceeds a set current value and outputs an overcurrent detection signal when the set current value is exceeded The control device configured separately from the switchboard operating as described above, and the switchboard and the control device for displaying the determination output of each branch breaker according to the determination output signal output from the control device It is characterized by comprising separate display means.

  According to a third aspect of the present invention, an overcurrent alarm device according to the present invention is arranged on the switchboard together with a main breaker and a plurality of branch breakers connected to a secondary side thereof, and outputs a current detection signal corresponding to the output current of each branch breaker. The current detection means comprising a hall element for output, and whether or not the current detection signal exceeds a set current value and operates to output an overcurrent detection signal when the set current value is exceeded A control device configured separately from the switchboard, and configured separately from the switchboard and the control device for displaying the determination output of each branch breaker according to the determination output signal output from the control device It is characterized by comprising display means.

  Furthermore, the overcurrent alarm device according to the invention of claim 4 is the overcurrent alarm device according to claim 1, 2, or 3, wherein the sensor board on which the current detection means is disposed is attached to the switchboard, and the sensor A power supply terminal for connection to the existing wiring is provided on one side of the board, and a connection terminal and an output terminal for current detection are provided on the opposite side to connect the input line to each branch breaker. It is a feature.

  Further, the overcurrent alarm device according to the invention of claim 5 is the overcurrent alarm device according to claim 1, 2 or 3, and is separated from the switchboard when there is any abnormality in the system of each branch breaker. It is characterized by comprising external display means that can confirm the energization state of the switchboard at the position.

Since the present invention is configured as described above, according to this, it is possible to implement various layouts, and an overcurrent alarm that can greatly enhance an alarm function for predicting the possibility of an overcurrent occurrence. An apparatus can be obtained.
Further, according to the present invention, in addition to the above effects, it is possible to significantly reduce the manufacturing cost, and it is possible to obtain an overcurrent alarm device capable of exhibiting a highly reliable alarm function. Become.

  Embodiments of the present invention will be described in detail below with reference to the accompanying drawings showing the embodiments.

  1 and 2 show one embodiment of the present invention, and FIG. 1 is a schematic diagram showing the main part of the present invention. In FIG. 1, in order to avoid complicated description of each part, the illustration of the main breaker installed in the switchboard H is omitted, and a plurality of branch breakers connected to the secondary side of the main breaker are also connected to the switchboard. Of these, only two branch breakers H1 and H2 are shown, and the other branch breakers are not shown. Therefore, the current detection sensors as current detection means for outputting a current detection signal corresponding to the output power supply of each branch breaker arranged on the switchboard H together with the breakers are also the two current detection sensors A1 and A2. The remaining current detection sensor is not shown in the figure.

  In FIG. 1, reference numerals 1 and 2 denote power supply lines wired from branch breakers H1 and H2 through current detection sensors A1 and A2, respectively. In the example shown in the drawing, the current detection sensors A1 and A2 are formed of Hall elements that are inexpensive devices manufactured using a semiconductor. As shown in FIG. 2, the plurality of current detection sensors constituting the current sensor unit are collectively mounted on a small sensor substrate SA, formed as a single unit, and housed in the switchboard H. Is done. Therefore, the existing switchboard can be used, and a new switchboard or a necessary investment is not required. The sensor board SA of this unit is provided with a power supply terminal for connection to the existing wiring on one side surface, and a connection terminal and an output terminal for current detection that connect the input line to each branch breaker on the opposite side surface. And provide. The signal lines L1 and L2 from the current detection sensors A1 and A2 are connected to each attenuator unit (ATT) B1 of the control unit B described later.

  B determines whether or not the current detection signal exceeds the set current value, and when it exceeds the set current value, the displacement is moved separately from the previous distribution board H that operates to output the overcurrent detection signal. A control unit as a device main body that can be configured, C is separate from the switchboard H and the control unit B for displaying the determination output of each branch breaker according to the determination output signal output from the control unit This is a warning light as an external alarm display means configured to be movable and displaceable.

  The control unit B is generally composed of a case B ′ constituting a part of the apparatus main body and a substrate SB on which various control devices are mounted. As shown in FIG. 2, an attenuator B1, an AC / rms converter B2, a current value comparison unit B3, and a latch unit B4 are sequentially connected to the substrate SB for each branch breaker system. Each latch portion B4 is connected to a plurality of alarm indicators CB, which are arranged on the front panel of the case B ′ of the apparatus main body and are composed of LEDs or the like that can identify the power supply line. Further, between the current value comparison unit B3 and the latch unit B4, a synthesis unit B3A extending to the signal line connecting the former and the latter and connected to the warning lamp C is extended. .

  As shown in FIG. 1, the power lines 1 and 2 include a plurality of devices 1-A, 1-B, 1-C..., Devices 2-A, 2-B, 2- C... Are connected to each other.

  In use, the warning light C is installed at an easy-to-see position in a store or the like, while the control device B having the warning indicator CB is also on standby to monitor the energized state, such as an office of a store or the like It shall be installed in the vicinity. When the devices 1-A, 1-B, 1-C, 2-A, 2-B, and 2-C are operated by energizing the power supply lines 1 and 2 from the distribution board H, the current is the current After being detected and measured by the detection sensors A1 and A2, respectively, they are inputted as electric signals to the attenuator sections B1 of the control device B via the signal lines L1 and L2, respectively. The electrical signal input to the attenuator section B1 can be reduced or attenuated by the attenuator section without changing its quality until the signal intensity reaches a certain attenuation. However, since the electric signal from each sensor is a signal current having the same frequency as the power supply frequency, it is necessary to calculate the effective value in order to compare it with the set current value. For this reason, the signal current passes through the attenuator section B and is then converted into an effective value by the AC / rms conversion section B2.

The signal current converted into the effective value as described above then enters each current value comparison unit B3, where the signal current value is compared with a preset current value, and whether or not the former exceeds the latter. Is determined. When it is determined that the signal current value exceeds the set current value, an abnormal signal is generated, and the signal is latched by the latch unit B4 and output to the warning lamp as the external alarm means C. At the same time, it is output to the alarm indicator CB at the same time, and a specific power supply line connected to a device with an abnormally increased load is displayed by lighting the alarm indicator to give a warning. It has become.
The set current value can be determined for each branch system, and the overcurrent measurement interval is periodically performed, for example, every 5.3 seconds. The abnormal signal can be easily cleared by pressing the reset button R provided on the case B ′ of the main body.

  FIG. 3 shows a modification in which a part of the embodiment is modified. In this modification, a rush current (inrush current) is prevented on the upstream side of the attenuator section (ATT) B1. The circuit B1 'is added to effectively cope with a rush current generated in a device that easily generates a sudden load increase, such as an electric pump.

According to the present invention, the switchboard is provided with a current sensor unit that outputs a current detection signal corresponding to the output current of each branch breaker, while determining whether the current detection signal exceeds a set current value and the setting A control device that operates to output an overcurrent detection signal when the current value is exceeded is configured separately from the switchboard so that it can be moved and displaced, and each branch according to the output signal from the control device The display means for warning the occurrence of overcurrent by displaying the determination output of the breaker is also configured separately from the switchboard and the control device so that it can be moved and displaced. The installation location of the means and the like can be arbitrarily determined, and the movement thereof is easy, so that a free layout is possible. Therefore, it is possible to implement various layouts such as changing the installation position of the control device, warning display means, etc. according to the change of the layout of equipment or devices connected to the power line, and greatly improve the alarm function It becomes possible to raise.
In addition, when using a current detection sensor composed of Hall elements, the unit price per unit is significantly lower than that of the conventional type, which greatly increases the manufacturing cost of the device itself, and therefore the selling price. It is possible to reduce it.

It is a schematic diagram which simplifies and shows the principal part of one Example of this invention. It is a block diagram which shows the main circuits in the said Example. It is the schematic of the modification which changed a part of said Example. It is a schematic diagram which simplifies and shows the switchboard which does not comprise an overcurrent alarm device, and the apparatus connected to the power supply line.

Explanation of symbols

H Switchboard H1, H2 Branch breaker 1, 2 Power supply line A1, A2 Current detection sensor L1, L2 Signal line SA Sensor board SB Board B Control part B1 Attenuator part B2 AC / rms conversion part B3 Current value comparison part B3A Synthesis part B4 Latch Part C Warning light

Claims (5)

The switchboard is provided with a main breaker and a plurality of branch breakers connected to its secondary side, current detection means for outputting a current detection signal corresponding to the output current of each branch breaker, and the current detection signal having a set current value. A control device configured to be separate from the switchboard that operates to determine whether or not the set current value is exceeded and to output an overcurrent detection signal when the set current value is exceeded, and is output from the control device An overcurrent alarm device comprising: the switchboard for displaying the determination output of each branch breaker according to the determination output signal and display means configured separately from the control device. Current detection means comprising an inexpensive device that is provided with a main breaker and a plurality of branch breakers connected to the secondary side of the switchboard, and that uses a semiconductor to produce a current detection signal corresponding to the output current of each branch breaker; Control that is configured separately from the switchboard that determines whether or not the current detection signal exceeds the set current value and outputs an overcurrent detection signal when the current value exceeds the set current value And a display means configured separately from the control panel and the switchboard for displaying the determination output of each branch breaker according to the determination output signal output from the control device. Features an overcurrent alarm device. A current detection means comprising a Hall element that is arranged with a main circuit breaker and a plurality of branch breakers connected to the secondary side of the distribution board and outputs a current detection signal corresponding to the output current of each branch breaker, and a current detection signal A controller configured to determine whether or not a set current value is exceeded and to output an overcurrent detection signal when the set current value is exceeded, and a control device configured separately from the switchboard An overcurrent comprising: the switchboard for displaying the judgment output of each branch breaker in accordance with a judgment output signal outputted from the device and a display means configured separately from the control device Alarm device. The overcurrent alarm device according to claim 1, 2, or 3, wherein a sensor board on which the current detection means is disposed is attached to the switchboard, and a power supply terminal for connection with an existing wiring is provided on one side surface of the sensor board. An overcurrent alarm device comprising a connection terminal for connecting an input line to each branch breaker and a current detection output terminal on the opposite side surface. In the overcurrent alarm device according to claim 1, 2 or 3, when there is any abnormality in the system of each branch breaker, the energization state of the switchboard can be confirmed at a position away from the switchboard. An overcurrent alarm device comprising an external display means.

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