KR20200001179A - Surge protect device with auto recovery means - Google Patents

Abstract

The present invention relates to an automatic recovery leakage circuit breaker, comprising: a leakage circuit breaker (10) intercepting a power input; a zero current transformer (20) recognizing a leakage; a leakage sensing unit (30) sensing a leakage from the zero current transformer (20); a relay (Ry) operated during leakage circuit breaking to make the power input branch off to a load; a microcomputer (50) driving the relay (Ry) with an operation value of the leakage circuit breaker (10) and the leakage sensing unit (30) and driving a motor driving unit (70) for recovering operation of the leakage circuit breaker (10); a sensor unit (80) sensing concentration of fine dust and an amount of ozone to send the sensed data to the microcomputer (50); a display (90) displaying an operation state of the microcomputer (50); an operation unit (92) commanding the output of the display (90) through the microcomputer (50) according to each condition; and a modem (95) transmitting a recognition value of the microcomputer (50) to a communication network. The present invention forms an inclined surface or a curved surface, thereby enabling stable recovery.

Description

Surge protect device with auto recovery means}

The present invention relates to an automatic recovery earth leakage breaker.

One type of power interruption / recovery facility is an earth leakage breaker, which responds to abnormal currents such as overcurrent, short circuit current, short circuit current, etc. in the power system of the customer, and operates the magnetic switch (or relay) for power off in response. Is cut off so that the consumer is no longer powered.

In addition, the abnormal current may be transient due to a transient state caused by a specific cause and may be temporarily restored to a normal state, or may be permanent due to a short circuit accident that cannot be restored to a normal state.

The earth leakage breaker is equipped with a recovery manual operation lever, so when the power is cut off, the user operates the recovery manual operation lever (switch lever) to switch the contact of the magnetic switch into the input state connecting the inlet contact and the load contact. If the power line is normally restored in case of temporary abnormal current, the earth leakage breaker normally reapplies the power to the load side.However, if the abnormal current is permanent, the cause of the abnormal current is not cured. If the magnetic switch is turned on again, the magnetic switch is cut off again by the abnormal current and the power is not supplied to the load side. If the abnormal state is permanent, the magnetic switch is kept in the disconnected state, and the cause of the abnormal state is found and removed. Manual operation lever should be reinserted. In addition, the ground fault circuit breaker is not only installed in a consumer such as a home, but may be installed to protect electrical facilities in a rare place such as a pumping station, an unmanned relay station, and a street lamp. There has been a problem that a person must visit the earth leakage breaker site in order to insert a manual operation lever for recovery in order to recover when the power is cut off.

In order to improve this problem, when a certain time elapses after the power is cut off in abnormal state, the magnetic switch is automatically turned on, and in case of temporary abnormal state, power is supplied and permanent abnormality is not restored to normal state. In the state, the automatic power off / recovery device for the magnetic switch to be turned off again (OFF) has been developed, but there is a problem that noise is generated when the magnetic action, durability is reduced by the impact, the cost is expensive.

Utility Model Registration No. 20-0285754 illustrates such an automatic power off / recovery device. However, such a conventional automatic power off / recovery device has the following problems.

(1) In the permanent abnormal condition, the operator should perform maintenance work. As soon as the worker removes the cause of the abnormal condition, the load side power line is switched to the energized state, so the worker has a risk of electric accident during the operation.

(2) Lightning protectors should be installed to be easy to replace because they are likely to be damaged by lightning, but they are difficult to repair because they are installed on the same PCB board as other electronic circuit components.

The present invention is to solve this problem, an object of the present invention is to provide an automatic recovery earth leakage circuit breaker to enable a stable recovery by placing the inclined surface or curved surface to stably return the switch lever in the motor drive unit of the deceleration function when the earth leakage circuit breaker is operating Is to provide.

Another object of the present invention is to put a push button on the control unit of the microcomputer to operate sequentially according to the number of presses of the setting mode, and to make it possible to distinguish the color by the color in the LED unit to visually check the number of times of recovery of the leakage It is to provide a self-healing earth leakage breaker that checks the status.

Another object of the present invention is to provide a self-healing earth leakage breaker for sensing the fine dust concentration and ozone amount to be remotely transmitted through a communication modem to check the remote control and contamination.

The present invention for this purpose is an earth leakage breaker for blocking the power input;

A current transformer for recognizing a short circuit;

A short circuit detecting unit detecting a short circuit from the image current transformer;

A relay which operates when the ground fault is interrupted and branches the power input to the load;

A microcomputer which drives a relay when a short circuit occurs with the ground fault breaker and the ground fault detection unit, and drives a motor driver for restoring the ground fault breaker operation;

Sensor unit for detecting the fine dust concentration and the amount of ozone sent to the microcomputer;

A display indicating an operating state of the microcomputer;

An operation unit for instructing display output to be displayed for each mode through a microcomputer; And

It provides an automatic recovery earth leakage breaker including a modem for transmitting the recognition value of the microcomputer to the communication network.

As described above, the present invention allows stable recovery by placing an inclined surface or a curved portion to stably return the switch lever from the motor driving part of the deceleration function when the earth leakage breaker is operated.

The present invention operates by setting mode according to the number of presses of the push button by placing a push button on the control unit of the microcomputer, and it is convenient to recognize the state of the environment by checking the number of times of recovery of the leak by allowing the LED unit to distinguish it by color. Use it.

Another object of the present invention is to sense the fine dust concentration and the amount of ozone so that it can be transmitted remotely through a communication modem to check the remote control and contamination status.

1 is a block diagram of the present invention;
2 is a block diagram of the motor driving unit of FIG.
3 is an exemplary configuration of the input / output unit of the microcomputer of the present invention;
4 is a partially cutaway perspective view of the present invention;
5 is a perspective view of the motor drive unit of the present invention,
6 is an exploded perspective view of FIG. 5;
Figure 7 is another illustration of the motor drive unit of the present invention,
Figure 8 is another illustration of the motor drive unit of the present invention,
9 is a planar plan view including the modification of FIG. 8;
10 is a plan view of the motor drive unit of the present invention,
11 is a cross-sectional view taken along the line AA of FIG.
12 is a perspective view of the coupling of the push plate of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

An earth leakage circuit breaker 10 for blocking a power input;

An image current transformer 20 for recognizing a short circuit;

An electric leak detecting unit (30) for detecting an electric leak from the image current transformer (20);

A relay (Ry) which operates when the ground fault is interrupted and branches the power input to the load;

A microcomputer (50) for driving a relay (Ry) at the time of a short circuit with an operation value of the ground fault circuit breaker (10) and the ground fault detection unit (30), and driving a motor driving unit (70) for restoring the ground fault breaker (10);

Sensor unit 80 for detecting the fine dust concentration and the amount of ozone sent to the microcomputer 50;

A display 90 indicating an operating state of the microcomputer 50;

An operation unit 92 instructing to display the output of the display 90 for each mode through the microcomputer 50; And

And a modem 95 for transmitting the recognition value of the microcomputer 50 to the communication network.

The motor driving unit 70 includes a motor 71 providing a rotational force, a reduction gear unit 72 for reducing the rotational force of the motor 71, and a switch of the earth leakage breaker 10 in conjunction with the output of the reduction gear unit 72. A push arm 73 for automatically returning the lever 12;

A push switch 74 which rotates the push arm 73 forward and returns, and reversely rotates the push arm 73 to stop at the stop position; And

The stopper 75 includes a stopper 75 that physically restricts the operation of the push arm 73 at the operating point of the push switch 74.

The operation unit 92 includes a push button 92-1,

The microcomputer 50 that stores the algorithm for recognizing according to the number of pushes of the push button 92-1 is configured to recognize the corresponding operation mode on the display 90 and to operate the other output terminals of the microcomputer 50. The LED unit 60 of different colors for each mode is connected.

The inclined surface 73-1 is added to the contact portion of the switch lever 12 of the push arm 73 so as to maintain stable area in contact with the switch lever 12 to enable stable recovery.

In the contact portion of the switch lever 12 of the push arm 73, a position in contact with the switch lever 12 is changed to form a convex curved portion 73-2 which functions to enable stable recovery.

The reduction gear unit 72 constituting the motor driving unit 70 includes a reduction gear 72-4 that decelerates through a rotational shaft of the motor 71 and a base cover 72 for reducing the reduction gear 72-4. -1), a pillar 72-3 providing a predetermined height for the base cover 72-1 to accommodate the reduction gear 72-4, and a top cover 72- covering the upper end of the pillar 72-3. 2), the push bar shaft 72-5, which is a reduction output shaft exposed by the top cover 72-2, the push arm 73 coupled to the upper end of the push bar shaft 72-5, and the push arm 73 The stop ring 72-6 shown in FIG. 12 which prevents the push bar shaft 72-5 from disengaging is comprised.

According to the present invention configured as described above, when a short circuit occurs, the ground fault circuit breaker operates itself and the switch lever 12 falls to the off position (TRIP). At the same time, an earth leakage signal waveform (a pulse waveform applied from a high level to a low level) is output to the connector CN1, and the microcomputer 50 is recognized through the input terminal I1, and the leakage current is about 12 seconds later by the setting algorithm. The output signal O1, which is a detection command signal port, is given a pulse signal that changes from high level to low level for leakage sensing.At this time, the relay Ry is turned on and does not go through the internal contact of the earth leakage breaker that is electrically open. The power output is applied to the load through R2). In this case, the current transformer 20 detects a leakage current generated in association with the load side. Then, the comparative output of the image comparator of the ground fault detecting unit 30 outputs a high level, and the leakage signal (H) is applied to the input terminal I4 of the microcomputer 50 via the output driving unit.

Of course, it is assumed that there is a leakage current, and when there is no leakage current, this signal is processed by the signal (L), and a high level signal is immediately applied to the terminal C and a low level signal to the terminal D, thereby providing the motor of the motor driving unit 70. 71) Rotate forward. Forward rotation of the motor 71 means that the push arm 73 of the motor driving unit 70 rotates as shown in FIG. 9, which means that the switch lever 12 recovers to the turned-on state as shown in FIG. 4.

At this time, when there is a leakage current, the output driver of the ground fault detecting unit 30 becomes a high level, which is recognized through the input terminal I4 of the microcomputer 50 and then the forward direction (terminal C is a high level, a terminal ( D0 is low level) and reverse operation (terminal C is low level, terminal D is high level) by applying any signal except the signal to prevent motor operation (forward rotation or backfire) and automatic recovery operation. Act to stop it.

At this time, the LED unit 60 acts as a feedback signal informing the relay operation through the input terminal I2 of the microcomputer 50 through the output detection signal unit 40 at the same time, and utilizes the optocoupler.

As a preferred example, when the LED unit 60 turns green, the normal state, and when the red light turns red, the switch lever is forcibly lowered by hand. Can be illustrated.

In the motor driving unit 70 of the present invention, when the motor 71 moves in the forward direction (the direction in which the switch lever 12 is raised) to the terminals C and D, the motor terminals E correspond to the levels H and L. When the push arm 73 raises and returns the switch lever 12, the L and H are applied to the terminals C and D in the reverse direction. Rotate Of course, when the push switch 74 is turned back when the electric motor is stopped, at the same time the physical stop by the stopper 75 is made at the same time.

The time of the short-circuit check operation (relay state) at the time of a short circuit is 1 time after 10 to 12 seconds after the switch lever 12 is turned off, 2 times after 10 to 12 seconds, and 3 after 10 to 12 seconds. An example of auto recovery is illustrated. The LED unit 60 operates when the fourth leakage occurs and starts flashing automatically, and enters the automatic standby state.

In addition, the present invention recognizes the fine dust concentration value recognized through the micro dust sensor 82 of the sensor unit 80 shown in Figure 3 through the microcomputer 50, the amount of ozone through the ozone sensor 84 is also a microcomputer ( 50) and the recognition value is converted into a digital value (not shown in the converting means) through a modem 95 through a port (RJ-45 port) or a serial connection port (RS485, RS422 serial communication pod). Transmit to a telecommunication network.

In addition, the recognition value can be confirmed through the display 90.

As an example of the checking method, when the push button 92-1 of the operation unit 92 is pressed once by an algorithm stored in the microcomputer 50, the automatic recovery cumulative number of times (for example, 0 to 999 times), and when pressed twice, the automatic recovery is performed. Cumulative number (1 ~ 3). Press three times to display the number of surge counts, press four times to display fine dust concentration, and press six times to return to the beginning (1st time).

10; earth leakage breaker 20; video current transformer 30; earth leakage detection unit Ry; relay 50; microcomputer 60; LED unit 70; motor drive unit 71; motor 72; reduction gear unit 72-1; base cup 72-2; top cover 72-3; Post 72-4; Reduction gear 72-5; Push bar shaft 72-6; Stop ring 73; Push arm 74; Push switch 75; Stopper 80; Sensor 90; Display 92; Control 92-1; Push button 95; Modem

Claims (5)

An earth leakage circuit breaker 10 for blocking a power input;
An image current transformer 20 for recognizing a short circuit;
An electric leak detecting unit (30) for detecting an electric leak from the image current transformer (20);
A relay (Ry) which operates when the ground fault is interrupted and branches the power input to the load;
A microcomputer (50) for driving a relay (Ry) at the time of a short circuit with an operation value of the ground fault circuit breaker (10) and the ground fault detection unit (30), and driving a motor driver 70 for restoring the ground fault breaker (10) operation;
Sensor unit 80 for detecting the fine dust concentration and the amount of ozone sent to the microcomputer 50;
A display 90 indicating an operating state of the microcomputer 50;
An operation unit 92 instructing to display the output of the display 90 for each mode through the microcomputer 50; And
Automatic recovery earth leakage breaker comprising a modem (95) for transmitting the recognition value of the microcomputer (50). According to claim 1, wherein the motor drive unit 70 is connected to the output of the motor 71 for providing a rotational force, the reduction gear unit 72 for reducing the rotational force of the motor 71, and the reduction gear unit 72, the earth leakage breaker ( A push arm 73 for automatically returning the switch lever 12 of 10);
A push switch 74 which rotates the push arm 73 forward and returns, and reversely rotates the push arm 73 to stop at the stop position; And
Automatic recovery earth leakage circuit breaker comprising a stopper (75) for physically restricting the operation of the push arm (73) at the operating point of the push switch (74). The method of claim 1, wherein the operation unit 92 includes a push button (92-1),
The microcomputer 50 that stores the algorithm recognized according to the number of pushes of the push button 92-1 is configured to recognize the corresponding operation mode sequentially on the display 90 and operate on the other output terminal of the microcomputer 50. Automatic recovery earth leakage breaker, characterized in that by connecting the LED unit 60 is different in color for each mode. 3. The automatic recovery presser according to claim 2, wherein an inclined surface (73-1) is added to a contact portion of the switch lever (12) of the push arm (73) to maintain an area in contact with the switch lever (12). . 3. The automatic recovery press according to claim 2, wherein the contact portion of the switch lever (12) of the push arm (73) is formed with a convex curved portion (73-2) which functions to change a position in contact with the switch lever (12). breaker.

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