CN201051123Y - Overcurrent detecting and warning device for power system - Google Patents

Abstract

An overcurrent detection warning device for an electric power system, comprising: the device comprises a direct current power supply, a current detector and an alarm; the input end of the direct current power supply is connected with a live wire and a neutral wire of the power circuit; the output end of the current detector is connected with a signal processing circuit; the DC power supply is used as electric energy, receives a signal output by the DC power supply and converts the signal into a DC potential so as to detect a current signal in a live wire or a neutral wire; the signal processing circuit is connected with the output ends of the direct current power supply and the current detector; meanwhile, the input end of the warning indicator is connected; the power supply circuit is used for converting a current signal detected by the power supply detection circuit into a corresponding direct current voltage level, comparing the direct current voltage level converted into the signal corresponding to the detected current with a voltage level set corresponding to a limit current set value, and generating output change when the detected value exceeds the set value; and an alarm for generating an alarm signal and outputting the alarm signal when the detection value exceeds a set value.

Description

Power system overcurrent detection and warning device

technical field

The utility model relates to a power system overcurrent detection and warning device, more specifically, a device that detects the current of the power system line, and when the current passing through the power system attached line exceeds the set value, it sends out a warning Power system overcurrent detection warning device.

Background technique

The socket line is an essential component of the power system in every building, and for the different socket line settings in the building, all countries will standardize the configuration specifications according to electrical regulations. In terms of overload protection devices, the most commonly used ones are On the distribution box, a no-fuse disconnect switch is installed in the socket branch wiring. If the current of the socket branch exceeds the rated value, the no-fuse disconnect switch will automatically trip. When the user needs to reset the socket circuit, he must After turning off the non-fuse switch, turn it on again.

The above-mentioned socket lines are all set on the wall or in fixed positions. In addition, it can be said that almost all users of power system socket lines will choose another device as follows: that is, one to multiple porous sub-plugs Or a multi-socket extension cord. In the overcurrent protection mechanism, some of these devices have no protection mechanism at all, and if there is a protection mechanism, it is only a blown or resettable fuse.

The existing socket circuit, no matter what kind of protection device it is, will only operate after reaching the rated current. The insulation coating of the wires gradually deteriorates, and the broken circuit also needs to replace the fuse or reset the switch before it can be used again.

In addition, the electrician's knowledge or concept of electricity is another factor that is rarely considered; the vast majority of users will not consider plugging in the socket circuit, especially the extended multi-hole socket device. What is the current consumed by the total load of electrical appliances connected to the plug in the jack and used by people? So many tragedies happened in this comprehensive situation.

Utility model content

The purpose of this utility model is to provide a power system overcurrent detection and warning device, in order to allow the general public to use electricity more safely, even if they have no electrical knowledge or concept, according to the socket line or porous The rated current of the socket extension device is preset with a certain percentage limit value and the current is detected at any time. As long as the load current of the line exceeds this set value, the warning device will be activated immediately to send out sound, light and other signals to remind the electricity user that it must be reduced or reduced. The number of electrical appliances used to ensure the safety of electricity use.

The utility model is realized by adopting the following technical means:

A power system overcurrent detection and warning device, comprising: a DC power supply, a current detector and an alarm; The power supply is connected to a DC power supply that converts the power supply to the required action of the device; a current detector, whose output terminal is connected to a signal processing circuit; the signal processing circuit uses the above-mentioned DC power supply as electric energy, and receives the output signal , to convert it into a DC potential to detect the current signal in the live wire or the neutral wire; a signal processing circuit, connected to the output terminal of the DC power supply and the current detector; connected to the input terminal of the alarm at the same time; The current signal detected by the detection circuit is converted into a corresponding DC voltage level, and the converted DC voltage level corresponding to the detected current signal is compared with the voltage level set corresponding to the limit current setting value, when When the detected value exceeds the set value, an output change is generated; and a warning device is used to generate a warning signal and output when the detected value exceeds the set value.

The aforementioned current detection circuit is composed of a current comparator, or a current transformer, or a reluctance component and an iron core, or a Hall component and an iron core.

The aforementioned warning devices are sound effect devices such as buzzers and horns, or light-emitting devices such as light-emitting diodes and bulbs.

Compared with the prior art, the utility model has the following obvious advantages and beneficial effects:

The power system overcurrent detection and warning device of the utility model can set a proportional limit value according to the rated current of socket lines of different specifications, such as 80% to 85%. If the detected total load current exceeds the limit, the warning device will be activated.

With this power system over-current detection and warning device, the power user does not need to have electrical knowledge or concepts, and can easily judge whether the power consumption is possible or has been overloaded by the device's warning or not, and adjust it immediately.

Description of drawings

FIG. 1A and FIG. 1B are schematic diagrams of embodiments of the power system overcurrent detection and warning device of the present invention;

Fig. 2 is the schematic diagram that the overcurrent detection and warning device of the power system is arranged in the single plug and socket;

Fig. 3 is the schematic diagram that this power system overcurrent detection and warning device is arranged in single plug and multi-socket device;

FIG. 4 is a schematic diagram of the overcurrent detection and warning device of the power system installed in a single plug and multiple sockets with extension cords.

Detailed ways

The specific embodiment of the utility model is described below in conjunction with accompanying drawing:

The utility model proposes embodiments as shown in FIG. 1A , FIG. 1B , FIG. 2 , FIG. 3 , and FIG. 4 for an overcurrent warning device in an electric power system.

Please refer to Fig. 1A or Fig. 1B, including: a DC power supply (DC power supply) 12, its input terminal is connected with the fire wire 10 and the neutral wire 11 of the power circuit, so as to obtain the operation information of the whole device from the power circuit The required power is converted into a direct current output; a current sensing device (Current sensing device) 13 is used for sensing by the live wire 10 or the neutral wire 11 of the power circuit to detect the current in the live wire 10 or the neutral wire 11 signal, the output terminal of the current detector 13 is connected with a signal processing circuit 14; the signal processing circuit (Signal processing circuit) 14 uses the DC power output by the DC power supply 12 as the operating electric energy, and receives the above-mentioned current detector The signal output by 13 is converted into a DC potential relative to the current size of the live wire 10 or the neutral wire 11 of the power circuit. When this DC potential exceeds the limit setting value, the signal processing circuit 14 generates a warning start signal; at the same time, a receiving The signal processing circuit 14 warns the alarm 15 of the activation signal. With the power system overcurrent detection device constructed in this way, when the current value of the live wire 10 or the neutral wire 11 of the power line exceeds the limit current setting value, the output of the signal processing circuit 14 changes, and the warning device 15 is activated to send out a warning signal , until the current value of the live wire 10 or the neutral wire 11 of the plug line is reduced due to the load 16, for example: reducing the electrical usage and reducing to below the limit current setting value before stopping.

The second embodiment of the present utility model is shown in Fig. 2, and the over-current warning device is arranged in the single plug and socket device for plugging in the power socket (not shown), and the signal processing circuit 14 uses a current signal The adjustment conversion circuit 141 is composed of a limit current value setting and comparison circuit 142, so that the DC power supply 12 is directly connected to the plug 17, and the live wire 10 and the neutral wire 11 of the plug 17 through the socket of the power system, Obtain the required DC power supply of the whole device action; secondly, detect the current signal in the live wire 10 or the neutral wire 11 of the plug circuit with the current detection device 13, and then adjust the conversion circuit 141 through the overcurrent signal of the signal processing circuit 14, The signal output by the current detection device 13 is converted into a DC potential relative to the current size of the live wire 10 or the neutral wire 11 of the plug circuit, and enters the limit current value setting and comparison circuit 142; when the current value of the live wire 10 of the plug circuit exceeds the limit current When the set value is set, the output of the comparison circuit 142 changes, and the warning device 15 is activated until the current value of the live wire 10 or the neutral wire 11 of the plug line is reduced to the limit due to the reduction of the electrical consumption and the like. It stops when the current setting value is below.

As shown above, the power system overcurrent warning device of the present utility model can be used for plugging into the single plug and socket of the power socket as shown in Figure 2, and can also be located in the power socket as shown in Figure 3. and, as shown in FIG. 4 , in the single plug and multi-hole socket 180 with an extension cord for plugging into the output end of the power supply system, The current detection of the power system can be fully realized by some basic circuit combinations, and a warning output will be generated after setting and comparing.

Finally, it should be noted that: the above embodiments are only used to illustrate the utility model rather than limit the technical solution described in the utility model; therefore, although the description has described the utility model in detail with reference to the above-mentioned various embodiments, Those of ordinary skill in the art should understand that the utility model can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and scope of the utility model should be covered by the claims of the utility model among.

Claims (3)

1. A power system overcurrent detection and warning device, comprising: a DC power supply, a current detector and a warning device; It is characterized in that: A DC power supply, the input terminal of which is connected to the live wire and the neutral wire of the power circuit, and is used to connect to the power supply and convert the power to a DC power supply for the required operation of the device; A current detector, the output end of which is connected to a signal processing circuit; the signal processing circuit uses the above-mentioned DC power supply as electric energy, and receives the output signal and converts it into a DC potential to detect the live wire or the neutral wire current signal in A signal processing circuit, connected to the output terminal of the DC power supply and the current detector; at the same time connected to the input terminal of the alarm; used to convert the current signal detected by the power supply detection circuit into a corresponding DC voltage level, and convert the converted Comparing the DC voltage level corresponding to the detected current signal with the voltage level set corresponding to the set value of the limit current, and generating an output change when the detected value exceeds the set value; and A warning device, when the detected value exceeds the set value, it will generate a warning signal and output it. 2. The power system overcurrent detection and warning device according to claim 1, characterized in that: the current detection circuit is composed of a current comparator, or a current transformer, or a reluctance component and an iron core, or a Hall component and an iron core. composed of the core. 3. The power system overcurrent detection and warning device according to claim 1 or 2, characterized in that the warning device is a sound effect device such as a buzzer or a horn, or a light emitting device such as a light emitting diode or a light bulb.

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