WO2016126019A1

WO2016126019A1 - Power supply state automatic recording system having separate sensor

Info

Publication number: WO2016126019A1
Application number: PCT/KR2016/000434
Authority: WO
Inventors: 나병철
Original assignee: 제닉스윈 주식회사
Priority date: 2015-02-04
Filing date: 2016-01-15
Publication date: 2016-08-11
Also published as: KR101508922B1

Abstract

The present invention relates to a power supply state automatic recording system having a separate sensor and, more particularly, to a power supply state automatic recording system having a separate sensor, wherein a current sensor circuit, which comprises two inexpensive zero-phase current transformers and one current transformer, is used such that a single power supply state automatic recording system can be used for multiple sub residual-current circuit breakers; even if the residual-current circuit breakers fail to operate, it is possible to check the power supply state easily through a capacitor, which stores preliminary DC power in a PCB substrate inside the power supply state automatic recording device; and a surge current or the corresponding date and time, for example, can be easily checked through a surge current measurement circuit and an RTC. The present invention provides a power supply state automatic recording system having a separate sensor, comprising: a residual-current circuit breaker connected to a power supply input terminal; and a power supply state automatic recording device having a separate sensor, which is coupled between load equipment connected to a power supply output terminal. The residual-current circuit breaker comprises: a single main residual-current circuit breaker for activating a trip driving unit according to a leak current, which is generated in a main power supply line, thereby shutting the main power supply off; and multiple sub residual-current circuit breakers connected to sub power supply lines, which branch off from the main residual-current circuit breaker, so as to activate trip driving units according to leak currents, which are generated in the sub power supply lines, thereby shutting the sub power supplies off. The power supply state automatic recording device having a separate sensor, which is connected to each sub residual-current circuit breaker, comprises: a transformer for electrically insulating between a primary winding and a secondary winding such that, even if a high voltage flows in a power supply line due to noise or an electrical leakage, the high voltage is not introduced; a DC power supply unit for converting AC power in the power supply line to DC power and supplying the same to each circuit and a microprocessor; a current sensor circuit comprising two zero-phase current transformers (ZCT) and one current transformer (CT); an electric leakage detection circuit for detecting an electric leakage, which occurs in the power supply line, through the zero-phase current transformers; a leak current measurement circuit for measuring the amount of current that leaks from the power supply line through the zero-phase current transformers; a surge current measurement circuit for sensing lightning or an instant overcurrent or overvoltage in the power supply line through the zero-phase current transformers; a used current measurement circuit for measuring the amount of current used in the power supply line through the current transformer; a surge voltage measurement circuit for sensing lightning or an instant overcurrent or overvoltage through the current transformer; a RTC (real-time clock) for measuring the date and time and transmitting the same to the microprocessor; a capacitor for storing preliminary DC power in a PCB substrate inside the power supply state automatic recording device such that the power supply state can be instantly grasped even during a blackout; a display device for displaying in real time the accumulated numbers of sensed blackouts, electric leakages, and surges, the leak current, and the used current and surge current measured through the current transformer; and a microprocessor for conducting controls such that accumulated numbers of blackouts, electric leakages, and surges of power supplied to the power supply line, which are sensed by respective measurement circuits, are stored in a non-volatile memory and displayed on the display unit, the surge current measured by the surge current measurement circuit, the leak current measured through the zero-phase current transformers, the used current measured through the current transformer, and information regarding the date and time transmitted from the RTC are stored in the non-volatile memory such that the same can be checked in real time, and are displayed on the display device.

Description

Sensor-powered automatic state recording system

The present invention relates to an automatic power supply state recording system of a sensor type, and more particularly, a single power state automatic recording system is connected to a plurality of sub-leakage circuit breakers by connecting a current sensor circuit including two low-cost current transformers and one current transformer. It is also possible to monitor the power status of multiple sub-leakage circuit breakers, and even if the circuit breaker does not operate, the power is easily supplied through a capacitor that stores spare DC power on the PCB board inside the automatic power state recording device. The present invention relates to an automatic sensor state recording system of a separate sensor, which can check the status and easily check the surge current, the date, and the time through the surge current measuring circuit and the RTC.

A conventional earth leakage breaker is a means for detecting a certain leakage current to prevent electric shock.It measures the difference between the current going into the power line and the incoming current and determines that the sum of the currents indicates a short circuit if it is not zero. Block it.

The earth leakage breaker includes an image current transformer (ZCT) that detects leakage current generated from a power line, a leakage current measurement unit that operates a trip driver according to the current sensed by the image current transformer, and a large current under the control of the leakage current measurement unit. It consists of a trip driving part that operates the circuit breaker and cuts off the power when leakage occurs.

That is, the earth leakage breaker simply detects a change in the input / output current (change in magnetic flux) of the current transformer by the current flowing through the power line to determine whether it leaks, and surge current or noise due to lightning strikes the power line. When the current transformer reacts, the leakage current measurement unit recognizes the change in current caused by the noise as a leakage current, and operates the trip driver to cut off the power to cut off the power supplied to the load device.

On the other hand, conventional patents include a malfunction prevention circuit breaker using a Korean Patent No. 1403972 PWM method, a Korean Patent No. 152839 automatic recovery type circuit breaker, and a Korean Patent Registration No. 1089719 an earth leakage circuit breaker automatic recovery device.

However, the above-mentioned conventional ground fault circuit breakers did not satisfy the consumer's desire to detect the leakage current and the operating current of the ground fault circuit breaker, and to solve this problem, the maximum allowable current of the load equipment (for example, one in three communication equipment 30A) Install multiple earth leakage breakers according to the main earth leakage breaker 90A equipment or three sub earth leakage breakers), and provide a number of power state detection devices for each type of earth leakage breaker to provide customers with various power status information. Due to the installation, there was a problem in that excessive construction costs and installation costs and excessive costs during demolition.

In addition, the power state detection device under development may have a separate external terminal for supplying temporary power to the display of the power state detection device by purchasing a battery by hand because the DC circuit breaker is not supplied when the earth leakage breaker does not operate. In order to solve this inconvenience, when installing a fixed battery such as a mercury battery there was a difficulty to secure the internal space.

In addition, when checking the power supply status, it was inevitable to purchase and confirm a device capable of confirming the number of surges or the current used separately, and it was more difficult to check the surge current or the corresponding date and time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the present invention can monitor a plurality of sub-leakage circuit breakers with a low-cost current sensor circuit installed in each sub-power line using one power state automatic recording device. There is a purpose.

In addition, the present invention is to mount a high-capacitance capacitor on the PCB substrate and use it as an auxiliary power source, it is possible to easily grasp the state of power immediately during power outage during monitoring, and there is no burden to secure the internal space separately.

In addition, the present invention can also check the power state recording date and time through the RTC, there is an object that can stably manage the power state by taking appropriate measures in advance.

In order to solve the above problems, the present invention provides a sensor-isolated power state automatic recording system consisting of an earth leakage breaker connected to a power input terminal and a sensor-isolated power state automatic recording device coupled between a load device connected to a power output terminal. The circuit breaker may include one main earth leakage circuit breaker that cuts off main power by operating a trip driver according to a leakage current generated from the main power line; And a plurality of sub-leakage circuit breakers connected to the sub-power lines branched from the main earth-leakage circuit breaker and operating the trip driver in accordance with the leakage current generated from the sub-leakage circuit breakers to cut off the sub-power. The sensor-separated power state automatic recording device may include: a transformer that insulates the primary winding and the secondary winding so that the high voltage does not enter even when a high voltage flows due to noise or a short circuit in the power supply line; A DC power supply unit converting AC power of a power supply line to DC and supplying each circuit and a microprocessor; A current sensor circuit comprising two image current transformers ZCT and one current transformer CT; A ground fault detection circuit for detecting a ground fault occurring at a power line through an image current transformer; Leakage current measuring circuit for measuring the amount of current leaking from the power line through the image current transformer; A surge current measurement circuit that detects lightning strikes and instantaneous overcurrent and overvoltage in a power line through an image current transformer; An operating current measuring circuit measuring an amount of current used in the power supply line through the current transformer; A surge voltage measuring circuit for detecting lightning, instantaneous overcurrent, and overvoltage through a current transformer; Real Time Clock (RTC), which measures the date and time and sends it to the microprocessor; A capacitor for storing spare DC power on a PCB board inside the automatic power state recording device so that the power state can be immediately determined even in the event of power failure; A display device which senses the sum of the number of interruptions, short circuits, and surges, sums the leakage current, the current used through the current transformer, and the surge current in real time; The number of power outages, short circuits, and surges of the power supplied to the power line is sensed by each measuring circuit, and the sum is stored in a nonvolatile memory and displayed on a display device.The surge current measured by the surge current measuring circuit and the image current transformer It includes a microprocessor for controlling to display on the display device after storing the leakage current through the current and the current used through the current transformer, and the date and time information received from the RTC in a nonvolatile memory for real-time confirmation.

In addition, when there is an external switch input when the earth leakage breaker of the present invention is inoperable and the DC power supply is inoperable, the display device of the display device is assisted by turning on a switch connected to the capacitor which stores power supplied from the DC power supply. Auxiliary power supply circuit for providing power; characterized in that it further comprises.

In addition, the outer body structure of the current sensor circuit of the present invention is to put the image transformer and the current transformer in one body, and to separate the middle portion of the image transformer and the current transformer to insert the wire and then to recombine the body of the separated image transformer and current transformer It is characterized in that the structure is formed of a hinge on one side and the other side has a split core type (Split Core Types) to insert the power line to the current sensor and then to combine the separated image transformer and the current transformer.

The present invention made as described above is obtained by using a low-cost current sensor circuit installed in each sub-power line, without having to install the power state automatic recording device in each sub-leakage circuit breaker to provide various power state information to the consumer. By transferring the data to a single automatic power state recording device, construction costs, installation costs, and demolition costs can be reduced.

In addition, the present invention is a power supply state using a capacitor that stores the power supplied from the DC power supply in advance, without the need to carry the battery or install a fixed battery such as a mercury battery in the portable circuit breaker does not work It can be easily connected to the automatic recording device's PCB board to check the power supply status, taking up less internal space and reducing manufacturing costs.

In addition, the present invention can improve the reliability of the product by confirming the date, time, etc. of the surge current using the RTC and taking appropriate measures in advance to stably manage the power supply state.

1 is a view showing the overall configuration of a separate sensor automatic power state recording system according to the present invention.

FIG. 2 is a diagram illustrating a detailed configuration of the current sensor circuit and the automatic power state recording apparatus of FIG. 1.

3 is a diagram illustrating a detailed configuration of a transformer, a DC power supply unit, and an auxiliary power supply circuit of FIG. 1.

The present invention provides a sensor-isolated power state automatic recording system consisting of an earth leakage breaker connected to a power input terminal and a sensor-powered automatic state recording device coupled between a load device connected to a power output terminal. A main earth leakage circuit breaker which operates the trip driver according to the leakage current generated by the main circuit to cut off the main power; And a plurality of sub-leakage circuit breakers connected to the sub-power lines branched from the main earth-leakage circuit breaker and operating the trip driver in accordance with the leakage current generated from the sub-leakage circuit breakers to cut off the sub-power. The sensor-separated power state automatic recording device may include: a transformer that insulates the primary winding and the secondary winding so that the high voltage does not enter even when a high voltage flows due to noise or a short circuit in the power supply line; A DC power supply unit converting AC power of a power supply line to DC and supplying each circuit and a microprocessor; A current sensor circuit comprising two image current transformers ZCT and one current transformer CT; A ground fault detection circuit for detecting a ground fault occurring at a power line through an image current transformer; Leakage current measuring circuit for measuring the amount of current leaking from the power line through the image current transformer; A surge current measurement circuit that detects lightning strikes and instantaneous overcurrent and overvoltage in a power line through an image current transformer; An operating current measuring circuit measuring an amount of current used in the power supply line through the current transformer; A surge voltage measuring circuit for detecting lightning, instantaneous overcurrent, and overvoltage through a current transformer; Real Time Clock (RTC), which measures the date and time and sends it to the microprocessor; A capacitor for storing spare DC power on a PCB board inside the automatic power state recording device so that the power state can be immediately determined even in the event of power failure; A display device which senses the sum of the number of interruptions, short circuits, and surges, sums the leakage current, the current used through the current transformer, and the surge current in real time; The number of power outages, short circuits, and surges of the power supplied to the power line is sensed by each measuring circuit, and the sum is stored in a nonvolatile memory and displayed on a display device.The surge current measured by the surge current measuring circuit and the image current transformer It includes a microprocessor for controlling to display on the display device after storing the leakage current through the current and the current used through the current transformer, and the date and time information received from the RTC in a nonvolatile memory for real-time confirmation.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. It should be noted that the same / similar components in each of the drawings may be illustrated with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

As shown in FIG. 1, the sensor detachable power state automatic recording system according to the present invention includes an

earth leakage breaker

10, 11, 12, and 13 connected to a power input terminal, and

load equipment

31 and 32 connected to a power output terminal. And a single sensor detachable power state automatic recording device 20 coupled between the main earth leakage breaker (Main ELB) and the sub earth leakage breaker (Sub ELB). 13) is suitably selected according to the maximum allowable current of the load equipment, for example, one main earth leakage breaker 10 connected to three load equipment (31, 32, 33) having a maximum allowable current specification of 30 A each. It is desirable to have a maximum allowable current specification of 90 A or more.

Therefore, according to the leakage current generated from the main power line, the main earth leakage breaker 10 may operate the trip driver to cut off the main power, or the plurality of sub

earth leakage breakers

11, 12, and 13 branched from the main earth leakage breaker 10. In addition to interrupting the sub power supply by operating the trip driver in accordance with the leakage current generated from the sub power supply line of the two sub-current transformers (ZCT) electromagnetically coupled to the power lines of the plurality of sub-leakage circuit breakers (11, 12, 13). One power state automatic recording device 20 by electrically connecting the current sensor circuit 40 including 41 and 42 and one current transformer CT 43 to one sensor separate power state automatic recording device 20; Also, power status information of a plurality of sub power lines can be checked.

Here, by setting and storing the ID or address that can be identified in each current sensor circuit 40, it is also possible to identify the state of a plurality of sub power lines by channel with one power state automatic recording device 20. For example, the wireless communication unit may be added to identify the remote location.

As shown in FIG. 2, the separated current sensor circuit 40 included in the sensor-separated power state automatic recording device 20 connected to each of the

sub-leakage breakers

11, 12, and 13 includes two image current transformers 41. , 42) and one current transformer 43, and the image

current transformers

41 and 42 and the current transformer 43 are put into one body, and the middle part is separated to insert a power line according to the internal structure. It is possible to have a structure to recombine the body, or one side is formed of a hinge and the other side has a split core type (Split Core Types) to insert the power line horizontally or vertically in accordance with the structure of the body of the current sensor circuit 40 Afterwards, the centrally separated structures of the two

image transformers

41 and 42 and one current transformer 43 may be combined again. Therefore, the work process in the case of attaching or removing the current sensor circuit 40 to a plurality of sub power lines can be easily terminated by a few driver operations.

The current sensor circuit 40 of FIG. 2 is a circuit composed of two image

current transformers

41 and 42 and one current transformer 43. The automatic power state recording device 20 includes a ground fault detection circuit 21 and a leakage current measurement. The circuit 22, the surge current measuring circuit 23, the working current measuring circuit 24, and the surge voltage measuring circuit 25 are configured.

Specifically, referring to FIG. 2, the ground fault detecting circuit 21 of the automatic power state recording device 20 detects a case where the sum of the current vectors does not become zero and detects the number of short circuits occurring in the power line. Circuit.

The leakage current measuring circuit 22 of FIG. 2 is a circuit measuring the amount of current leaking from the power line through the image

current transformers

41 and 42.

The surge current measuring circuit 23 of FIG. 2 is a circuit for detecting lightning or instantaneous overcurrent and overvoltage at a power line through the image

current transformers

41 and 42.

The use current measuring circuit 24 of FIG. 2 is a circuit measuring the amount of current used in the power supply line through the current transformer 43.

The surge voltage measuring circuit 25 of FIG. 2 is a circuit for detecting lightning, instantaneous overcurrent, and overvoltage through the current transformer 43.

The microprocessor 29 of FIG. 2 stores the total number detected by each

measuring circuit

21, 22, 23, 24, and 25 in the nonvolatile memory after displaying the number of power failures, leakages, and surges of the power supplied to the power line. The surge current measured by the surge current measuring circuit, the leakage current through the image

current transformers

41 and 42, the current used through the current transformer 43, and the date and time received from the RTC 29-1. It is a device that stores information in a nonvolatile memory and displays it on a display device so that information can be checked in real time.

In addition, the microprocessor 29 of FIG. 2 displays the display device 50 of FIG. 3 in real time or displays a remote server (not shown) when the number of interruptions, the number of leaks, the number of surges, the leakage current, and the use current exceeds a set value. May be controlled to transmit.

Real Time Clock (RTC) 29-1 of FIG. 2 is a device for measuring a date and time and transmitting the same to a microprocessor. For example, a DS12887 RTC chip may be used.

As shown in FIG. 3, the transformer 26 is electrically insulated between the primary winding 26-1 and the secondary winding 26-2 so that the high voltage is drawn even when a high voltage flows due to noise or a short circuit to the power supply line. It is a device that prevents it. That is, even if an overcurrent flows through the main power supply line or the sub power supply line, it may be prevented from flowing into the PCB substrate inside the power state automatic recording device 20.

The DC power supply unit 27 of FIG. 3 is an apparatus for converting AC power of a power line into a DC power source. The DC power supply unit 27 is composed of a bridge circuit, a capacitor C1, and resistors R1 and R2 to convert the rectified DC current into each

circuit

21, 22, 23, 24, 25, microprocessor 29, and the like.

The auxiliary power circuit 28 of FIG. 3 stores spare DC power (or energy) so that the

circuit breaker

10, 11, 12, or 13 may not recognize the power supply state even in the event of power failure. Capacitor C2; 28-1 may be mounted on a PCB board inside the power state automatic recording device 20 to use spare storage power when necessary, and the capacitor C2 28-1 itself may be a power state automatic recording device ( Mounted only to the PCB substrate of 20), for example, even using a supercapacitor occupies less internal space of the overall power state automatic recording device 20, and can reduce manufacturing costs compared to the prior art.

The display device 50 of FIG. 3 senses the total number of times of detecting power failure, short circuit, and surge in each measuring

circuit

21, 22, 23, 24, and 25, the operating current through the leakage current and the current transformer, and the surge current. Is displayed through the display device 50 in real time.

Or, the number of times of detecting the sum of power failure, leakage, and surge including the date and time received from the RTC 29-1, the sum of the information, the leakage current, the operating current through the current transformer, and the surge current information. 3 is stored in a non-volatile memory connected to the microprocessor 29 of 3, and the display device 50 displays the number information, the current used, the surge current information, and the like in parallel based on the date and time information.

According to the present invention described above, the power state automatic recording device 20 is not required to be installed in each sub-circuit breaker to provide various power state information to the consumer. By recording each power state information measured by the current sensor circuit 40 composed of two image

current transformers

41 and 42 and one current transformer 43, the power state automatic recording devices 20 are connected to each sub-leakage breaker. The cost of construction, installation and dismantling can be reduced.

In addition, the present invention, when the power circuit breaker (10, 11, 12, 13) is not operated and the power is not supplied, the power state automatic recording without the need to carry the battery or install a fixed battery such as a separate mercury battery inside the portable By mounting the capacitor 28-1 on the PCB board inside the device 20 and using it as an auxiliary power source when necessary, the power state is checked, thereby reducing manufacturing costs by taking up less space in the internal power state recording system 20. can do.

In addition, the present invention checks the corresponding date, time, etc. of the surge current through the surge current measuring circuit 23 and the RTC (29-1) to take appropriate measures in advance to stably manage the power supply status to ensure the reliability of the product. Can be improved.

Claims

In the sensor isolated power state automatic recording system consisting of an earth leakage circuit breaker connected to a power input terminal and a sensor-type power state automatic recording device coupled between a load device connected to a power output terminal,

Earth leakage breaker,

A main leakage circuit breaker which cuts off the main power by operating the trip driver according to a leakage current generated from the main power line; And a plurality of sub-leakage circuit breakers connected to the sub-power lines branched from the main earth-leakage circuit breaker and operating the trip driver in accordance with a leakage current generated from the sub-power line to cut off the sub-power.

One sensor-separated power state automatic recording device connected to each sub-leakage circuit breaker may include: a transformer that insulates the primary winding and the secondary winding so that the high voltage does not enter even when a high voltage flows due to noise or a short circuit in the power supply line;

A DC power supply unit converting AC power of a power supply line to DC and supplying each circuit and a microprocessor;

A current sensor circuit comprising two image current transformers ZCT and one current transformer CT;

A ground fault detection circuit for detecting a ground fault occurring at a power line through an image current transformer;

Leakage current measuring circuit for measuring the amount of current leaking from the power line through the image current transformer;

A surge current measurement circuit that detects lightning strikes and instantaneous overcurrent and overvoltage in a power line through an image current transformer;

An operating current measuring circuit measuring an amount of current used in the power supply line through the current transformer;

A surge voltage measuring circuit for detecting lightning, instantaneous overcurrent, and overvoltage through a current transformer;

A Real Time Clock (RTC) that measures the date and time and sends it to the microprocessor;

A capacitor for storing spare DC power on a PCB board inside the automatic power state recording device so that the power state can be immediately determined even in the event of power failure;

A display device which senses the sum of the number of interruptions, short circuits, and surges, sums the leakage current, the current used through the current transformer, and the surge current in real time; And

The number of power outages, short circuits, and surges of the power supplied to the power line is sensed by each measuring circuit, and the sum is stored in a nonvolatile memory and displayed on the display.The surge current measured by the surge current measuring circuit and the image current transformer A microprocessor for controlling leakage current and current used through the current transformer and the date and time received from the RTC to be displayed on a display device after being stored in a nonvolatile memory for real-time checking. Power status automatic recording system.
The method of claim 1,

When there is an external switch input when the earth leakage breaker is activated and the DC power supply is inoperable, the capacitor which stores the power supplied from the DC power supply is turned on to provide power to assist the display function of the display device. Auxiliary power circuit; sensor separated power state automatic recording system, characterized in that it further comprises.
The method of claim 1,

The outer body structure of the current sensor circuit is a structure in which the video current transformer and the current transformer are put in one body, the middle parts of the current transformer and the current transformer are separated, the wires are inserted, and the body of the current transformer and the current transformer is recombined. Formed by this hinge, the other side has a split core type (Split Core Types) has a structure capable of recombining the separated image current transformer and the current transformer after inserting the power line to the current sensor, characterized in that the automatic power state recording system .