KR102001155B1 - Automatic recovery type leakage breaker - Google Patents

Abstract

The present invention relates to a leakage circuit breaker with automatic recovery having a function of monitoring and rebooting a main microcomputer which automatically and quickly separates a surge protection element when the surge protection element is destroyed by a surge voltage or a surge current or operates a hook by one touch as needed to separate the surge protection element from a hooking unit to facilitate replacement, maintenance, and repair, and reboots a main microcomputer of a driving circuit if the main microcomputer does not operate normally to allow the main microcomputer to operate normally, and prevents malfunction of shutting off power by recognizing momentary lightning or noise as a leakage. According to the present invention, the leakage circuit breaker with automatic recovery having a function of monitoring and rebooting a main microcomputer comprises a driving circuit including: a switch to open and close a power line; an open trip coil to open the switch; a short trip coil to close the switch; a zero phase current transformer to detect a leakage current of the power line; an opening control unit to drive the open trip coil if a leakage current of the zero phase current transformer is higher than or equal to a reference shutoff value; a main microcomputer to calculate a leakage current by using an input voltage and a load voltage of the power line, and drive the short trip coil if the calculated leakage current is lower than or equal to a reference recovery value; and a rebooting unit to shut off driving power supplied to the main microcomputer and then resupply the driving power to reboot the main microcomputer if the main microcomputer does not operate normally.

Description

[0001] The present invention relates to an automatic recovery type leakage breaker having a monitoring and rebooting function of a main microcomputer,

The present invention relates to an automatic restoration type earth leakage breaker for automatically recovering a leakage current and supplying power to a load,

More particularly, the surge protector can be quickly separated automatically when a surge voltage or surge current breaks, or can be detached from the housing of the housing by one-touch operation of the hook,

The main microcomputer has a monitoring and reboot function that can prevent malfunctioning when the main microcomputer of the driving circuit does not operate normally and re-starts to operate normally and recognizes instantaneous lightning or noise as a short circuit, Circuit breaker.

The ground fault circuit breaker is equipped with a video current transformer and a switch in a power line that supplies power to the load, and when a leakage current of more than a reference value is detected in the voltage transformer, the power line is opened by the switch, Prevent accidents.

A prior art related to an earth leakage circuit breaker or a surge protection device is the patent registration No. 10-1618210 (registered on Apr. 28, 2016) [circuit breaker with integrated surge protector]

This patent relates to a circuit breaker integrated with a surge protector integrated with a general earth leakage breaker or an automatic restoration type earth leakage breaker,

Specifically, a leakage circuit breaker with a built-in surge and noise resistance and a SCR with improved surge resistance compared to the existing SCR are applied to reduce the occurrence of malfunctions of the circuit itself due to surge and noise. (And a surge protector-type, automatic restoration type circuit breaker), and a surge protector integrated circuit type circuit breaker (and a surge protector integrated type auto repair Type earth leakage breaker).

The conventional circuit breaker according to the prior art No. 10-1618210 does not disclose a technique in which a surge protector is automatically disconnected or easily separated by a one-touch method when a surge protector is destroyed by surge voltage or surge current, In the case of electric, electronic, and communication equipment installed in a remote area such as a mountainous area, it is necessary to increase the height of the communication tower It has been pointed out that it is one of the issues that aggravates the poor condition of the environment.

It is very inconvenient for the user to manually operate the lever of the earth leakage breaker to recover the leakage current after the electric leakage breaker is operated due to the operation of the earth leakage breaker and the manual recovery is delayed, have.

In recent years, an automatic restoration type earth leakage circuit breaker is widely used, in which, when the leakage current disappears, the earth leakage breaker recognizes and is automatically restored.

Prior Art 10-1065850 "Leakage circuit breaker equipped with automatic restoration function ", Registered Patent No. 10-0981762" Leakage circuit breaker automatic restoration device ", Registered Patent No. 10-1813148 And an "automatic restoration type earth leakage breaker"

The conventional automatic restoration type earth leakage breaker recognizes an instantaneous lightning stroke or noise as a short circuit and opens the power line. When the lightning strike or the noise disappears, the power line is closed to be restored.

In other words, the automatic restoration type earth leakage breaker according to the related art frequently recognizes an instantaneous lightning or noise as a short circuit and frequently causes a malfunction that opens and closes the power line.

Such frequent malfunctions of the automatic restoration type earth leakage breaker deteriorates the quality of the power supplied to the load and adversely affects the circuit of the earth leakage breaker, which causes the failure of the earth leakage breaker.

Therefore, it is necessary to prevent a momentary lightning stroke, noise or the like from being recognized as a short circuit, that is, to prevent a malfunction. However, in the prior art, there is no malfunction prevention function.

If an overvoltage is applied to the earth leakage breaker due to instantaneous lightning or noise, it is halt or latch-up of the microcomputer, so that the earth leakage breaker is not automatically restored and the function is lost.

At this time, it is necessary to reset the microcomputer by resetting the microcomputer so that the function of the microcomputer can be recovered and operated normally. Rebooting of the microcomputer is normally performed manually by the user. Therefore, the reset operation of the microcomputer is troublesome, and if the user recognizes the delay, the load side may suffer a large damage.

Therefore, if the microcomputer is halted or latch-up, it is necessary to automatically reboot, which is not available in the prior art.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problem of the conventional automatic restoration type earth leakage breaker,

The surge protector is automatically disconnected quickly when it is destroyed by surge voltage or surge current, or it is detached from the housing of the housing by one-touch operation of the hook if necessary. The surge protector is caught in the housing of the surge protector The object of the present invention is to provide an automatic restoring type circuit breaker which is capable of quickly and accurately separating a separating mechanism having a body integrally provided with a hook for holding and connecting itself by various trigger members, do.

In addition, it is possible to safely prevent a momentary overvoltage of a lightning or surge from being recognized as a short circuit, to prevent malfunctioning, to monitor the operation state of the microcomputer, and to automatically reset when an abnormality is detected so that the function of the earth leakage breaker is prevented from being lost, Another object of the present invention is to provide an automatic restoration type circuit breaker having a monitoring and rebooting function of a main microcomputer for stably supplying power.

In order to achieve the above object, an automatic restoration type earth leakage breaker having a monitoring and reboot function of a main microcomputer according to the present invention includes:

An automatic restoration type circuit breaker for automatically shutting off a power supply to a load by opening a power line when a leakage current is detected and automatically recovering the leakage current when the leakage current is lost to supply power to the load,

A housing having a latching portion and a mounting portion;

A surge protection element coupled to the mounting portion of the housing; And

A body coupled to the case of the surge protection element, a hook extending from the body to be coupled to the engagement portion of the housing by being exposed to the outside of the case, and a case installed in the housing mounting portion to separate the surge protection element A separating mechanism including a spring for applying elasticity and a percussion member for releasing the hook from the engaging portion;

And a one-touch separating means for separating the surge protective element from the housing at one-touch due to elasticity of the spring when the hook is separated from the retaining portion by the operation of the detent member.

An opening / closing device for opening / closing a power line;

An open trip coil for opening the switch;

A short trip coil for closing the switch;

A video current transformer for detecting a leakage current of the power line;

An open control unit for driving the open trip coil when a leakage current of the video current transformer is equal to or greater than a reference cut-off value;

A main microcomputer for calculating a leakage current using the input side voltage of the power line and the load side voltage and driving the short trip coil when the calculated leakage current is less than a reference recovery value;

And a rebooting unit for rebooting the main microcomputer by supplying power to the main microcomputer when the main microcomputer is not operating normally.

The rebooting unit

A sub-microcomputer for receiving a supervisory signal periodically generated and transmitted by the main microcomputer,

And a relay connected to a driving power supply line for supplying driving power to the main microcomputer,

The sub microcomputer turns off the relay when the supervisory signal of the main microcomputer is not received for a predetermined time or longer, so that the main microcomputer reboots,

And a malfunction prevention unit for monitoring a voltage on the load side of the power line and for preventing the open control unit from driving the open trip coil for a predetermined period of time to prevent malfunction when the monitored voltage exceeds a reference overvoltage. and,

The malfunction prevention unit

A load voltage sensing unit for sensing a load voltage,

The load voltage sensing unit includes a first photo-coupler that operates when a reference overvoltage abnormality is detected,

A second photocoupler for transmitting a drive hold signal to the open control unit,

And a sub-micom receiving the signal of the first photocoupler to operate the second photocoupler.

An automatic restoration type earth leakage breaker having a monitoring and rebooting function of the main microcomputer according to the present invention

The surge protector is automatically disconnected quickly when it is destroyed by surge voltage or surge current, or it is detached from the housing of the housing by one-touch operation of the hook if necessary. The surge protector is caught in the housing of the surge protector The separating mechanism having the body integrally provided with the hooks for holding the hooks for self-attachment can be quickly and precisely separated by the elasticity of the spring by one-touch or automatic operation by the various trigger members,

When leakage current is generated, it prevents electric shock or electric accident by shutting off the power supply to the load side, and when the leakage current disappears, it is instantly recovered and power is supplied to the load side to minimize the electric damage, Of the main microcomputer so as to prevent the malfunction of the earth leakage breaker by preventing the malfunction of the circuit breaker by preventing the malfunction of the main microcomputer, An automatic restoration type earth leakage breaker having a reboot function,

It is a very useful invention for industrial development.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view of an automatic restoration type earth leakage breaker according to the present invention, and a photograph taken in FIG.
FIG. 2 is a photograph showing an alternative embodiment of the automatic restoration type circuit breaker according to the present invention. FIG.
FIG. 3 is a photograph and a drawing for the drawing of the automatic restoration type earth leakage breaker according to the present invention. FIG.
4 is a view of a one-touch separation means of a surge protection element according to the present invention.
Fig. 5 is a view of the trigger member of the separating mechanism, which is different from Fig. 4;
6 is a circuit diagram of a main microcomputer and its periphery of an automatic restoration type earth leakage breaker having a monitor and reboot function of a main microcomputer according to the present invention.
7 is a circuit diagram of a sub-micom and its surroundings in an automatic restoration type earth leakage breaker having a monitoring and rebooting function of a main microcomputer according to the present invention.

Hereinafter, an automatic restoration type earth leakage breaker having a monitoring and rebooting function of the main microcomputer according to the present invention will be described in detail with reference to the drawings.

Before describing the automatic restoration type earth leakage breaker having the monitoring and rebooting function of the main microcomputer according to the present invention,

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In describing the automatic north-arc type earth leakage circuit breaker L according to the present invention, when it is specified for the sake of convenience for the sake of convenience,

The direction is specified in accordance with this standard unless otherwise specified in the detailed description and claims of the invention relating to the other drawings.

2 to 4, an automatic north plug type earth leakage breaker L according to the present invention includes a housing 10 having a mounting portion 11 and a latching portion 15 in the mounting portion, A surge protection element 20 provided in the mounting portion and a separation mechanism 30 for performing one-touch or automatic separation of the surge protection element through a trigger member Tr or the like.

The housing 10 provided with the engaging portion 15 in the mounting portion 11 as shown in the upper one-dot chain line in Fig. 3 [D] also has the spring mounting portion 13 for one- .

3, the surge protection element 10 is slidably coupled to the mounting portion 11 of the housing 10, as shown in FIGS. 2B and 2D, (23) is identified as a green mark indicating the normal mark (Sn)

When the fuse 41 of the surge protection element is destroyed by the surge voltage or the surge current, as shown in Fig. 2 [D] and Fig. 1 [B] (in the one- The green display panel sn of the display panel 23 is moved by the elastic means 43 to be detached from the display window 23 and the red display panel sa provided on the rear surface thereof is exposed and the abnormal display Sa is displayed.

2 and 3, the separating mechanism 30 includes a body 31 coupled to a case 21 of the surge protection element 20, and a body 31 extending from the body, A spring 33 which is provided on the housing mounting portion 11 and applies elastic force to the case 21 in a direction separating the surge protection element 20 35 and a detent member Tr for releasing the hook 33 from the engaging portion 15.

When the hook 33 is detached from the engaging portion 15 by the manual or automatic mechanism of the trigger member, the surge protection element 20 is quickly separated from the housing 10 by one-touch due to the elasticity of the spring 35 .

The hook 33 of the separation mechanism 30 further includes a branch portion 33B supported on the inner wall of the housing mounting portion 15 so that the manual rod 33A for manual operation of the separation mechanism can be further extended have. The branch portion also serves as a stopper for preventing the hook 33 of the separating mechanism 30 from being further advanced after being caught by the housing engaging portion 15 when the surge protective element is coupled with the support.

As shown in the upper dash-dotted line ellipse of Fig. 2 [D], the separating mechanism 30 is disposed at the center of the axis 31A of the body 31

One side manual rod 33A, hook 33 and branch 33B,

The other side display panel sn, the spring hole 31s, and the projection 31B are integrally formed.

As shown in the upper one-dot chain line in Fig. 3 [D], the spring mounting portion 13 of the housing 10 is provided with a spring for mounting the spring 35 for one-touch or automatic triggering of the surge protection element 20 The side walls 13a and the central horizontal holding protrusions 13b which surround the one end of the spring are provided in a shape in which the shape of the alphabet 'E'

As shown in Fig. 3 [B], one end of the spring 35 is supported by the central horizontal holding protrusion of the mounting portion 11, and the corresponding spring fitting portion 23s protrudes from the case 21 of the surge protection element 20 So that both ends of the spring 35 are horizontally installed.

In addition, the central horizontal holding projection is formed with a fixing pin 13c which is inserted between the spiral springs and prevents the spring from coming off,

' 형상을 가져 스프링 내경의 라운드 부분이 잘 지지되면서도 스프링 내경 보다 작아 조립시 결합이 쉽고 또 서지보호소자의 원터치 분리시 스프링(35)에서 순간 이탈되는 상황에서 마찰저항을 최소화 하도록 구성되어 있다.The end face of the spring-fitted portion 23s of the case 21 of the surge protection element 20 is'

'Shape so that the round portion of the spring inner diameter is well supported and is smaller than the inner diameter of the spring so that the coupling is easy during assembly and the friction resistance is minimized in a situation where the spring is momentarily released from the spring when the one-

The terminals t1 and t2 protrude for electrical connection and the terminals T1 and T2 of the surge protection element 20 are connected to the mounting portion 11 of the housing 10, T2.

The fuse 41 of the surge protection element 20 in the triggering member Tr of the separating mechanism 30 is connected to the surge voltage or the surge current etc., as shown in Fig. 4B-1 and B- A model in which the surge protection device 20 is automatically disconnected at the time of destruction is shown.

Specifically, the separation mechanism 30 separates the shaft 31A of the body 31 axially coupled to the swing axis S21 of the case 21 of the surge protection element 20 and the other projecting portion 31A of the body 31 31B,

The triggering member (Tr) 40A has a fuse 41 contacting the protrusion 31B to lock the separating mechanism 30 in place,

And a resilient means 43 for connecting the spring hole 31s, which is the other end of the body 31, with the case 21,

When the fuse is broken, the projecting portion 31B, which has kept the locking state in contact with the fuse, is unlocked and the axis 31A of the body 31 is rotated about the swing axis S21 by the force of the elastic member 43, So

The hook 33 of the separating mechanism 30 is disengaged from the engaging portion 15 of the housing 10 and the surge protection element 20 is automatically disengaged by the elasticity of the spring 35. [ In Fig. 4 [B-2], the breakage fuse d41 can be confirmed.

On the other hand, as shown in Figs. 4A-1 and A-2, the trigger member model in which the surge protector is manually detached by one touch

When the one end manual rod 33a of the separation mechanism 30 is pushed upward, the hook 33 directly connected thereto is immediately displaced

The hook 33 hanging on the latching portion 15 of the housing 10 is released and the surge protection element 20 is momentarily pushed by the elasticity of the spring 35 and left to the left.

On the other hand, as shown in Fig. 5 [A] and [B], as a modification of the model in which the surge protector is manually one-

The trigger member (40B) of the separating mechanism (30) includes a pressing portion of the hook (33) and a pressing portion for pushing the portion to be pressed and releasing the hook from the latching portion (15) (45).

5A and 5B are respectively a side view of the left side and a bottom side of the center of the right side trigger member,

When the user presses the button-type operating member 45, the operating member pushes down the hook 33 and pushes the hook 33 downward, and the hooking portion 33, which is protruded downward from the upper portion of the housing 10m by a predetermined length, 15, the hook 33 is further lowered and deviates from the restraint with the engaging portion,

Referring to the left side view, the surge protection element 20 is lifted up by the elastic force of the spring 35 to be detached from the housing 10.

If necessary, this trigger member model is replaced with an operating member having a pressing portion for pressing the inclined surface 33a (see Fig. 2 [C]) of the hook 33 (constituting the pressed portion) and releasing the hook from the engaging portion .

Referring to FIGS. 1 and 2 [A], an automatic restoration type earth leakage breaker L according to the present invention is provided with an earth leakage breaker that cuts off power by an electric shock due to a short circuit, lightning, noise, overcurrent, In addition,

When the switch L3 is displaced to the OFF state due to temporary leakage, lightning, noise, and malfunction,

The microcomputer L1 automatically detects the power shutoff phenomenon and switches the switch L3 to the on state by the operation of the plunger of the return solenoid L2 at the earth leakage breaker L to re- The circuit breaker is equipped with an automatic restoration function that minimizes the cost and maintains the continuous operating state of the system.

The separating means A of the present invention can be installed at various positions of the earth leakage breaker L. The separating means A of the present invention can be installed at various positions of the earth leakage breaker L, The protection element 20 is fitted to the coupling portion 15 so that the hook 33 is caught and fixed and the manual rod 33A of the separation mechanism 30 is exposed to the left, The display window 23 of the fuse 41 is exposed and the normal mark Sn of the fuse 41 can be confirmed.

6 and 7, a drive circuit 100 of an automatic restoration type earth leakage breaker having a monitor and reboot function of a main microcomputer according to the present invention includes a switch CB, an open trip coil L1, a short trip coil And a main microcomputer U2 and a sub-microcomputer U9, as shown in FIG.

Referring to FIG. 1, a power line 1 for supplying commercial power to a load side is provided with a switch CB and a ZCR transformer ZCT.

The switch CB is provided on the power line 1 so that the power line 1 is opened or closed so that the commercial power input from the input side is supplied to the load or is cut off.

A lever is connected to the switch CB so that the user can manually open or close the lever manually.

The open trip coil L1 and the short trip coil L5 act as powerful electromagnets when a large current flows instantaneously to automatically open or close the switch CB.

The ZCT is installed on the power line (1) to sense a leakage current.

The open controller 110 drives the open trip coil L1 to open the power supply line 1 when the leakage current sensed by the voltage transformer ZCT exceeds a reference cutoff value .

The opening control unit 110 includes a hybrid IC U1 for driving the open trip coil L1 and a peripheral circuit thereof.

The open trip coil L1 is provided in a load voltage sensing unit connected to the load side of the power supply line 1. [ The open trip coil L1 can not drive the switch CB due to the current input from the load side of the power sources, and the SCR provided in the hybrid IC U1 is turned on, The open trip coil L1 can be driven to open the switch CB.

The hybrid IC U1 informs the main microcomputer U2 through the fifth photocoupler U5 when the open trip coil L1 is driven. The main microcomputer U2 counts the number of times the switch CB is opened by the open trip coil L1 through the fifth photocoupler U5 and the switch CB is opened When it is opened, the switch CB is no longer automatically restored so that the user can check and confirm the problem of the power system and cope with it.

The malfunction prevention unit recognizes a lightning strike or a surge as a short circuit when momentarily applied thereto, thereby preventing a malfunction that opens the switch CB.

The malfunction prevention unit includes a load voltage sensing unit 120, a first photocoupler U10, a second photocoupler U3, and a submicrocomputer U9.

The load voltage sensing unit 120 includes a surge arrester INR1 connected to the load side of the power line 1 to protect it from overvoltage, and a bridge diode BD1 for full-wave rectifying the power on the load side.

The output voltage of the load voltage sensing unit 120 is applied to two voltage distribution resistors R57 and R58 through the connector J1 and the first photo coupler U10 is connected to the voltage distribution resistors R57 and R58 And the submicrocomputer U9 operates by applying a driving voltage to the second photocoupler U3 to operate the second photocoupler U3, and the second photocoupler U3 is turned on when the applied voltage exceeds the reference overvoltage, When the photocoupler U3 is operated, the transistor Q1A is turned on and transmits a high (or low) drive hold signal to the hybrid IC U1 of the open controller 110. [

The hybrid IC U1 receiving the driving suspension signal from the second photocoupler U3 drives the open trip coil L1 for a predetermined period of time even if a leakage current equal to or greater than a reference blocking value is sensed in the zero-current transformer ZCT And if the leakage current that is not less than the reference blocking value is detected even after a predetermined time elapses, then the open trip coil L1 is driven.

In other words, when the hybrid IC U1 instantaneously generates a leakage current due to a lightning strike or a surge using the drive suspend signal of the malfunction prevention unit, the hybrid IC U1 recognizes the leakage current as a short circuit and does not open the power line 1 Prevent malfunction.

The main microcomputer U2 monitors and controls the operation state of the earth leakage breaker and closes the opened power line 1 when the electrical leakage state is eliminated.

The main microcomputer U2 monitors whether a voltage is applied to the load through the fourth photocoupler U4 connected to the load voltage sensing unit 120 through the power line 1 and outputs the voltage to the hybrid IC U1 And monitors the number of times that the switch CB is opened and the number of times the switch CB is opened through the fifth photo coupler U5.

First, a driving power source 130 for generating a driving power for driving the main microcomputer U2 is connected to an input side of the power line 1.

The driving power supply unit 130 includes a surge arrester INR3 for protecting against overvoltage, a bridge diode DB2 for full-wave rectifying the input power source, a resistor R27 for converting the full-wave rectified power source to DC, a capacitor C12, And a zener diode (ZD1) that constantly increases the voltage level.

An input voltage sensing unit 140 is connected to the output side of the driving power source 130 to sense an input side voltage of the power source line 1 in order to check whether the leakage current state is eliminated, And an output voltage sensing unit 150 for sensing a voltage on the output side (load side) of the power line 1 is connected.

The main microcomputer U2 calculates a leakage current using the input voltage and the output voltage sensed by the input voltage sensing unit 140 and the output voltage sensing unit 150, respectively.

The main microcomputer U2 turns on the triac Q2 of the recovery trip unit 60 to apply a large current to the short trip coil L5 instantaneously if the leakage current of the main microcomputer U2 is less than the reference recovery value, The switch CB is operated to cause the power line 1 to be short-circuited.

The short trip coil L5 is provided in the driving power supply unit 130 so that power is supplied from the input side of the power supply line 1 at normal times but the switching power supply unit CB can not be driven by the power supply, And drives the switch CB when a large current is applied from the trip portion.

The main microcomputer U2 is an IC for monitoring and controlling the earth leakage breaker as a whole. If it does not operate normally, the leakage current state can not be grasped during a leakage current, and the leakage current can not be automatically recovered when the leakage current is eliminated. .

Therefore, when the main microcomputer U2 is not operating normally, the present invention resumes the main microcomputer U2 by forcibly resetting the main microcomputer U2 so that the main microcomputer U2 operates normally

To this end, the main microcomputer U2 periodically generates a supervisory signal WD to the submicrocomputer U9, and the submicrocomputer U9 receives a supervisory signal WATCH-DOG (RAT3) connected to the driving power supply line (2) connecting the driving power supply unit (130) and the main microcomputer (U2) is turned off after the monitoring signal (WATCH-DOG) The main microcomputer U2 is supplied again after the driving power supplied to the main microcomputer U2 is shut down so that the main microcomputer U2 is rebooted. The main microcomputer U2 which is rebooted is reset to normally monitor and control the earth leakage breaker.

A switch SW3 for allowing the user to manually reboot the main microcomputer U2 is connected to the driving power line 2 for connecting the driving power source 130 and the main microcomputer U2 to the main microcomputer U2, And LEDs (LED5 and LED6) for confirming whether the LEDs are being supplied are connected.

When the main microcomputer U2 does not receive a supervisory signal WATCH-DOG from the main microcomputer U2 and the switch CB is opened and the power line 1 is opened, Off of the relay RY3 for rebooting the battery pack U2 is repeated a predetermined number of times.

The main microcomputer U2 is rebooted by the relay RY3 on / off to the sub microcomputer U9. The main microcomputer U2 recognizes the number of on and off states to check whether the load power is cut off. If the load power is cut off, The coil L5 is driven to be automatically recovered.

The submicrocomputer U9 is provided with a constant voltage unit 170 for supplying driving power to be independently driven without being influenced by the main microcomputer U2. The constant voltage unit 170 is connected to an output side of the bridge diode DB2 of the driving power source unit 130 and includes a resistor R62, a capacitor C29, a zener diode ZD3, a reactor L4, And generates and supplies a constant-voltage driving power for driving the switching element U9.

While the present invention has been described with reference to the accompanying drawings, it is to be understood that the present invention is not limited to the above embodiments and various changes and modifications may be made by those skilled in the art And such variations and modifications are to be construed as falling within the scope of protection of the present invention.

A: Separation means L: Earth leakage breaker
10: housing 11:
13: spring mounting part 15:
20: Surge protection element 21: Case
23: display window S21: swing shaft
30: separating mechanism 31: body
33: Hook 33A: Manual load
35: spring Tr, 40A, 40B:
41: Fuse 43: Elastic means
45: Operation member
1: power line 2: driving power line
110: Open control section 120: Load voltage sensing section
130: driving power unit 140: input voltage sensing unit
150: Output voltage sensing unit 160: Recovery trip unit
170: constant voltage section 180: reboot section
CB: Switchgear ZCT: Video current transformer

Claims (5)

An automatic restoration type circuit breaker for automatically shutting off a power supply to a load by opening a power line when a leakage current is detected and automatically recovering the leakage current when the leakage current is lost to supply power to the load,

An opening / closing device for opening / closing a power line;
An open trip coil for opening the switch;
A short trip coil for closing the switch;
A video current transformer for detecting a leakage current of the power line;
An open control unit for driving the open trip coil when a leakage current of the video current transformer is equal to or greater than a reference cut-off value;
A main microcomputer for calculating a leakage current using the input side voltage of the power line and the load side voltage and driving the short trip coil when the calculated leakage current is less than a reference recovery value;
A rebooting unit for re-supplying power to the main microcomputer when the main microcomputer is not operating normally, and for rebooting the main microcomputer;
And a driving circuit for restoring the power line by opening or closing the power line according to whether the leakage current is detected, and for monitoring and rebooting the main microcomputer. The method according to claim 1,
A housing having a latching portion and a mounting portion;
A surge protection element coupled to the mounting portion of the housing; And
A body coupled to the case of the surge protection element, a hook extending from the body to be coupled to the engagement portion of the housing by being exposed to the outside of the case, and a case installed in the housing mounting portion to separate the surge protection element A separating mechanism including a spring for applying elasticity and a percussion member for releasing the hook from the engaging portion;
Wherein the surge protection element is detached from the housing by one-touch due to elasticity of the spring when the hook is detached from the engagement portion by the operation of the detent member. Auto recovery type earth leakage breaker. 3. The method of claim 2,
The rebooting unit
A sub-microcomputer for receiving a supervisory signal periodically generated and transmitted by the main microcomputer,
And a relay connected to a driving power supply line for supplying driving power to the main microcomputer,
Wherein the main microcomputer turns off the relay when the monitoring signal of the main microcomputer is not received for a predetermined period of time or longer so that the main microcomputer is rebooted. breaker. The method according to claim 2 or 3,
And a malfunction prevention unit for monitoring a voltage on the load side of the power line and for preventing the open control unit from driving the open trip coil for a predetermined period of time to prevent malfunction when the monitored voltage exceeds a reference overvoltage. Which has the monitoring and reboot function of the main microcomputer. 5. The method of claim 4,
The malfunction prevention unit
A load voltage sensing unit for sensing a load voltage,
The load voltage sensing unit includes a first photo-coupler that operates when a reference overvoltage abnormality is detected,
A second photocoupler for transmitting a drive hold signal to the open control unit,
And a sub-microcomputer for receiving the signal of the first photocoupler and operating the second photocoupler, wherein the main microcomputer has a monitoring and rebooting function.

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