KR100703925B1 - Earth leakage circuit breaker of concent type - Google Patents

Abstract

An earth leakage breaker of a plug receptacle type is provided to prevent an accident at a load side by opening a main switch when a mis-wiring to connect a power side to a load side is generated. An earth leakage breaker of a plug receptacle type includes a substrate(100), a movable unit(110), a reset pin(130), and a latch unit(LATCH). Load side terminals(H-LOAD,N-LOAD) and power side terminals(LINE-HOT,LINE_NEU) are installed on the substrate(100). The movable unit(110) is latched by the latch unit(LATCH). A penetrating hole in a shape of a cylinder is formed on a center of the movable unit(110) to insert the reset pin(130) supported by a spring into the penetrating hole. The latch unit(LATCH) has a horizontal unit and a perpendicular unit. The horizontal unit has a cutting groove formed in a lengthwise direction on a center of the latch unit(LATCH). The perpendicular unit is bent downward from the horizontal unit.

Description

Earth leakage circuit breaker {earth leakage circuit breaker of concent type}

1 is a circuit diagram of an embodiment of the present invention.

2 is a configuration diagram for explaining an important part of an embodiment of the present invention.

The present invention relates to an outlet type earth leakage breaker, and more particularly, to an outlet type earth leakage breaker for preventing an accident occurring on the load side by opening the main switch when the load side and the power side of the earth leakage breaker are incorrectly connected.

The outlet type circuit breaker is an electrical connection device that implements both the outlet function and the circuit breaker function. When the power line is connected to the load side of the connection device, the ground fault circuit breaker does not operate even when a short circuit occurs.

The present invention is to solve such a problem, an object of the present invention to provide an outlet type circuit breaker for preventing the mis-wiring (mis wiring) that the power line is connected to the load side.

According to the present invention, an outlet type circuit breaker including an earth leakage circuit breaker for opening and closing a main switch installed between a power supply terminal and a load terminal, the video current detecting a video current flowing through a power line connecting the power supply terminal and the load terminal. Detection circuit; A driving circuit for driving the solenoid by the output of the image current detection circuit; It is installed vertically on the substrate on which the driving circuit and the detection circuit are installed, and opens and closes the main switch contact by high and high motions. A through hole is formed in the center, and a through step is formed in the through hole. A movable part provided with a reset key restored by a spring and having a latch portion latched by the reset key by the operation of the solenoid; When the power is connected to the load-side terminal is in contact with the latch portion in accordance with the movement of the movable portion is connected to supply power to the solenoid to latch the latch portion to include a miss wire prevention means for stopping the movement of the movable portion It features.

In addition, in the present invention, the main switch contact is made of a first contact connected to the power supply side, a second contact connected to the plug insertion connector of the other electrical equipment, and a second contact connected to the other outlet connection coater, One end of each of the first contacts is preferably fixed, the other end is lifted by the upward movement of the movable part to be in contact with the second contact point and the third contact point, and restored and separated by the downward movement of the movable part.

In addition, the latch portion in the present invention is made of a 'b' shape having a horizontal portion and the lower portion is bent into the horizontal portion and the horizontal portion is formed in the transverse slit groove is formed horizontally cut through the movable portion in the movable portion When the reset pin passes through the incision groove of the horizontal portion, the movable part is moved up and down, and when the step of the reset pin is caught on the wall of the incision groove of the horizontal part, a latch is formed to move the up and down movement of the movable part. When the stopper is connected to the movable part of the solenoid to the incision groove of the vertical part and the miss wire preventing means is brought into contact with the latch part, it is preferable to move the latch part laterally to make the latch state.

In addition, in the present invention, the miss wire preventing means includes two contacts protruding obliquely to the substrate, and the two contacts are preferably conducted as the latch portion of the movable portion rises and is opened as the portion falls.

In addition, in the present invention, it is preferable that the upper portions of the two contacts of the miss wire preventing means are installed below the first contact point.

Hereinafter, an embodiment of the present invention according to the accompanying drawings will be described in detail.

1 is a circuit diagram of an embodiment of the present invention.

1 is an outlet type circuit breaker for connecting a power terminal (L-HOT), (N-HOT) and a load terminal (H-FACE), (N-FACE), (H-LOAD), (N-LOAD) The main switch SWM is installed on the wire, and the main switch SWM is opened and closed by the solenoid SOL.

The load side terminals H-FACE and N-FACE represent the plug insertion terminals of the outlet, and the load side terminals H-LOAD and N-LOAD are terminals for connecting other outlets.

Based on the main switch (SWM), a current transformer (ZCT) is installed on the power supply side to detect the image current, and a known short circuit detection consisting of the image current transformer (ZCT), resistor (R3), capacitor (C7), and (C8) The circuit 10 has a known short circuit detection circuit comprising a ground fault detection IC IC1 having capacitors C1, C2, C3, C4, C9, and C10 installed outside when a short circuit occurs. An earth leakage signal is input to the input pins IN1 and IN2 of the circuit 20.

When the earth leakage signal is input to the input pins (IN1) and (IN2) from the output pin (7) of the earth leakage detection IC (IC1), the 'high' signal is output, and the 'high' signal is self-tested through the resistor R11. It is input to the PB4 / x2 pin 3 of the self-test IC IC2 of the circuit 30. The self test IC (IC2) is a microcomputer with a built-in program. The resistor (R2) and the diode (D2) are connected between the IN pin 8 of the earth leakage detection IC (IC1) and the VCC pin 8 of the self test IC (IC2). Is connected in series to supply a constant voltage to the self-test IC (IC2) from the IN pin (8). At this time, a capacitor C5, C6, and a zener diode D3 are provided between the IN pin 8 and ground to remove noise of the supply voltage. In addition, between the VCC pin 8 and the PB2 / SCK pin 7, an LED D4, which is a test result display lamp, is provided through the resistor R9. The internal program of the self test IC (IC2) prevents the LED (D4) from emitting by holding the potential of the PB2 / SCK pin (7) high when the test result is normal, and by switching to low when abnormal. The LED D4 is made to emit light to warn that the circuit breaker is abnormally operated.

In addition, a resistor R15 and a switch SW1 are provided between the power supply terminal L-HOT and the load terminal N-LOAD, and an image current flows through the image current transformer ZCT when the switch SW1 is closed.

In addition, the driving circuit 40 for driving the main switch SWM includes a bridge diode BD and a solenoid SOL. Terminal 1 of the bridge diode BD is connected to the load side terminal H-LOAD, terminal 2 is grounded, terminal 3 is connected to the solenoid SOL which drives the main switch SWM, The terminal 4 is connected to the thyristor Q1 which is a switching element in the self test circuit 30.

In addition, a miswire terminal MWT is connected between the terminal 1 and the terminal 3 of the bridge diode BD. At this time, the miss wire terminal (MWT) is made of a miswire contact (MWT1), (MWT2) to be described later is a contact that is conductive or open by the rack portion.

In addition, a self-test wire connected between a resistor R14, a resistor R8, and a thyristor Q2, which is a switching element, is connected between the power supply terminal L-HOT and ground, and an image current transformer when a current flows in the self-test wire. An image current is generated at ZCT.

In addition, the gate of the thyristor Q1 is connected to the PBO / MOSI pin 5 of the self-test IC (IC2), and the internal program is connected to the PB4 / x2 pin (from the IN pin 8 of the ground fault detection IC (IC1). When the high signal is input to 3), the high signal is output from the PBO / MOSI pin 5 so that the thyristor Q1 is conducted so that the solenoid SOL is operated to open the main switch SWM.

In addition, the gate of the thyristor Q2 is connected to the PBO / MISO pin 6 of the self-test IC (IC2), and the internal program of the self-test IC (IC2) generates a constant pulse from the PBO / MISO pin (6). The current is supplied to the self test line by supplying it to the gate of the thyristor Q2.

At this time, the magnitude of the pulse applied to the gate of the thyristor Q2 is determined by the resistors R7 and R14 connected to the PB4 / x2 pin 2.

2 is a configuration diagram for explaining an important part of an embodiment of the present invention.

On the substrate 100, a power supply terminal (LINE-HOT), a (LINE-NUE), a load terminal (H-LOAD), (N-LOAD), (H-FACE) and (N-FACE) are provided, and a solenoid ( SOL) and the power supply side contact 2 are elastically moved up and down by a spring on the substrate 100 and are symmetrically installed around the movable part 110 latched by the latching part, and are fixed to the fixing part 120. . The contact 2 is a plate having a length, one end of which is fixed to the fixing part 120, and the other end thereof is lifted by the jaw part 111 formed on the movable part when the movable part 110 is lifted up so that the load-side contact 1, ( 3) and is elastic so as to be separated from the contacts (1), (3) when the movable portion (110) is downward. In the center of the movable portion 110 is formed a cylindrical through-hole reset pin 130 which is elastically supported by the spring, the latch portion (LATCH) of the "L" shape is installed horizontally, the reset pin It is latched or released by 130.

Latch part (LATCH) is composed of a vertical portion bent downward from the horizontal portion and the horizontal portion is formed in the longitudinal groove formed in the longitudinal direction in the center, the vertical portion is formed with an incision groove open to the bottom. At this time, the movable part of the solenoid is coupled to the cutout of the vertical part, and it is comprised so that a latch may be moved laterally.

In addition, the end of the reset pin 130 is formed in the shape of an arrowhead having a stepped portion, as shown, is latched when the stepped portion is caught in the boundary of the incision groove in the horizontal direction, the latch is released It is in a state.

In addition, the lower side of the power supply side contact (2) is provided with a miss wire terminal (MIT) consisting of two miss wire contacts MIT1, MIT2 protrudingly biased toward the latching part, and the movable part 110 is raised. When the latch is brought into contact with the contacts MWT1 and MWT2, the latch is turned on.

When the power is normally connected to the power supply terminal, when the reset key is pressed, the latch of the latch Latch is released and the movable part 110 is lifted from the substrate by the action of the spring, and the latch LATCH is connected to the contact ( MWT1) and contact MWT2. At this time, since the contacts 1, 2, and 3 are not in contact with each other, power is not applied to the solenoid SOL, and the left and right movement of the latch LATCH does not occur. Accordingly, the movable part 110 continues to rise, and thus the contacts 1, 2, and 3 come into contact with each other, so that power is supplied from the power supply side to the load side, and the earth leakage breaker performs a normal operation.

However, in the case where a wrong wiring for supplying power to the load side is made, if the movable part 110 is raised after pressing the reset pin 130, the latch Latch and the contacts MWT1 and MWT2 come into contact with each other. Power is supplied to the solenoid SOL from the diode BD so that the solenoid moving part pulls the latch LATCH, which causes the latch LATCH to become a latch and stop moving. Therefore, the contacts (1), (2), (3) can not be contacted in the incorrect wiring state. In this case, the circuit is operated by the following process to detect a short circuit and to operate the main switch SWM.

When the ground fault breaker is installed and the switch SW1 is pressed to test whether it is installed properly, the IN1 pin (1) and the IN2 pin of the ground fault detection IC (IC1) of the ground fault detection circuit 20 are released from the ground fault detection circuit 10. An earth leakage signal is input to (2). When the ground fault signal is input to the ground fault detection IC IC1, a high signal is input from the IN7 pin 7 to the PB4 / x2 pin 3 of the self test IC IC2 of the self test circuit 30. When a high signal is input to the PB4 / x2 pin (3) of the self-test IC (IC2), a 'high' signal is output from the PB0 / MOSI pin (5) to the gate of the thyristor (Q1) to operate the solenoid (SOL). Open the main switch (SWM). Thus, after installing the earth leakage breaker, it goes through the normal confirmation procedure. It is well known that such a confirmation procedure can be confirmed by pressing the switch SW1 from time to time not only after installation, but also to confirm that the earth leakage breaker operates normally.

When a ground fault breaker is installed and a ground fault occurs during energization, a ground fault current is sensed in the ground fault detection circuit 10 and the above process is repeated to operate the solenoid SOL to open the main switch SWM.

In a situation where a short circuit does not occur, the PB1 / MISO pin 6 of the self test IC (IC2) is supplied to the gate of the thyristor Q2 of the pulse (25 ms), and when the thyristor Q2 is conducted, The current flows from the ground fault detection circuit 10 to the ground fault detection IC IC1 (S4), and the ground fault detection IC IC1 inputs a high signal to the self test IC IC2.

As described above, when the high signal is input to the self-test IC (IC2), the difference between the pulse generation time and the high signal input time is calculated, and when the time difference is smaller than the preset time, it operates normally. By determining and maintaining the high voltage state of the PB2 / SCK pin 7, the above steps are repeated by periodically generating a pulse without operating the test result display LED (D4).

However, when the time difference exceeds the predetermined time, the voltage of the PB2 / SCK pin 7 is set to low to emit the LED D4, and the solenoid SOL is operated to open the main switch SWM. .

According to the present invention having the above object and configuration, it is possible to prevent erroneous wiring to confuse and connect the power supply side and the load side of the outlet type earth leakage breaker.

In addition, it can be seen that the normal operation without tripping the earth leakage breaker in the normal connection.

Claims (5)

In the case of an outlet type circuit breaker including a circuit breaker for opening and closing a main switch installed between a power terminal and a load terminal: An image current detection circuit for detecting an image current flowing through a power line connecting the power supply terminal and the load terminal; A driving circuit for driving the solenoid by the output of the image current detection circuit; It is installed vertically on the substrate on which the driving circuit and the detection circuit are installed, and opens and closes the main switch contact by high and high motions. A through hole is formed in the center, and a through step is formed in the through hole. A movable part provided with a reset key restored by a spring and having a latch portion latched by the reset key by the operation of the solenoid; When the power is connected to the load-side terminal is in contact with the latch portion in accordance with the movement of the movable portion is connected to supply power to the solenoid to latch the latch portion to include a miss wire prevention means for stopping the movement of the movable portion An outlet type earth leakage breaker characterized by the above-mentioned. According to claim 1, The main switch contact is made of a first contact connected to the power supply side, a second contact connected to the plug insertion connector of the other electrical equipment, and a second contact connected to the other outlet connection coater, One end of each of the first contact is fixed, the other end is lifted by the upward movement of the movable portion to contact the second contact and the third contact, it is restored and separated by the downward movement of the movable portion Outlet-type earth leakage breaker. The method of claim 2, wherein the latching portion is moved to a through slit formed transversely to the movable portion is made of a 'b' shape having a horizontal portion is formed in the horizontally cut groove and the incision groove is bent into the horizontal portion opening The movable part is moved up and down when the reset pin passes through the incision groove of the horizontal part, and when the step of the reset pin is caught by the wall of the incision groove of the horizontal part, a latch is formed to move up and down the movable part. And the movable part of the solenoid is connected to the cutout groove of the vertical part, and when the miss wire preventing means is brought into contact with the latch part, the latch part is moved laterally to make a latch state. breaker. The method of claim 3, wherein the miss-wire preventing means comprises two contacts protruding obliquely to the substrate, the two contacts are conducted in accordance with the rise of the latch portion of the movable portion, it characterized in that the opening is opened as falling Outlet-type earth leakage breaker. 5. The outlet type circuit breaker of claim 4, wherein an upper portion of two contacts of the miss wire preventing means is installed at a lower portion of the first contact point.

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