KR101762362B1 - Earth leakage circuit breaker system for security in the vulnerable areas of the electric shock accidents which apply the reduction technology to shorten operating time by 50% based on electronic circuit design of earth leakage circuit - Google Patents

Abstract

The present invention relates to an earth leakage circuit breaker system to which an operation time reduction technique of 50% is applied for securing the safety of a vulnerable human body based on an electronic circuit design of an earth leakage breaker. The present invention relates to a zero-phase current transformer (ZCT) input stage 11; The resistor R 2 and the resistor R 3 of 100Ω are used to prevent IC breakage and malfunction caused by the surge by using the clamp diode 11a at the ZCT input terminal 11 in the electrical leak detecting electronic circuit portion 10 having the cap (Delay Capacitor-C _DLY ) (10) for providing a structure for limiting the size of a surge current by inserting a short circuit breaker (10); And a trip driver (100); The handle frame 130 of the trip driving part 100 is configured such that the engagement part of the core constituting the bobbin coil part 110 is in contact with the trip A trip bar 135 which is fixed to the latching groove of the bar 135 and operates by operation of a core; As the core is retracted by the magnetic field of the core, the bobbin, the yoke, the fix core and the coil in the bobbin coil part 110, When the trip bar 135 is pulled by the latching member fixed to the latching groove of the bar 135, the tripping bar 135 rises through the link 132 formed at the front end of the tripping bar 135, A lever 131 to be detached from the fixed contact end 121; .
As a result, by optimizing the circuit design for the time delay phenomenon that occurs when the characteristics of the IC used in the electronic circuit of the earth leakage breaker operate within the half period of the sinusoidal wave, the conventional short circuit trip time is shortened to 1/2, Thereby reducing the time required to reduce the risk of drafts.
In addition, by minimizing the joint structure of the handle frame constituting the trip driver, it is possible to eliminate the delay elements of the handle and the frame structure, as well as to eliminate the delay elements of the lever operation. Can be reduced by 2 to 3 ms.

Description

TECHNICAL FIELD [0001] The present invention relates to an earth leakage circuit breaker system, and more particularly, to an earth leakage circuit breaker system having a reduction in operation time of 50% technology to shorten operating time by 50% based on electronic circuit design of earth leakage circuit}

The present invention relates to a circuit breaker system with a reduction in operating time of 50% for securing the safety of an area vulnerable to human shock based on an electronic circuit design of a circuit breaker. More specifically, The maximum value of the measured value is limited to within 30 ms. In order to overcome the limitation that is measured up to 26 ms, the electronic circuit of the earth leakage breaker is designed to examine the electronic circuit of the circuit breaker and to provide an improvement circuit The present invention relates to an earth leakage breaker system using a reduction in operation time of 50% in order to secure the safety of vulnerable areas based on human shock.

1 is a diagram showing an electronic circuit diagram (1) of an earth leakage breaker according to a conventional technique. Referring to FIG. 1, when a leakage current detected by a ZCT (Zero Current Transformer) is input to an IC, a leakage current detection signal is amplified by a differential amplification circuit in the IC. The amplified signal is compared with the reference potential inside the IC to determine whether or not a short circuit is present, and the Latch circuit operates by outputting it.

At this time, the output level of the latch circuit is determined (Δt), the trigger signal is transmitted to the SCR-Gate through the delay time after confirmation, and the SCR-Gate is immediately turned on after the secondary delay time, Flows. The magnetic force generated by the current flowing in the coil automatically cuts off the power by driving the trip bar inside the earth leakage breaker.

Such an electric circuit breaker, which is an electric safety device, is becoming more important with an increase in electric power consumption. As buildings are becoming larger and electric capacity and branching circuits used for them are increasing, exposure by electric shock is also increasing. When electric shock accident is classified by voltage, it is seen that the most accident occurs at low pressure rather than high pressure and many people die. Therefore, it is necessary to minimize the trip operation time of the earth leakage breaker to increase the safety.

If an outlet is installed in a place where water is used in a state where the human body is wetted with water, the leakage current circuit breaker for protection against human body electric shock (subject to the Electric Appliance Safety Standard or KS standard, rated sensitivity current 15 mA or less Shall be provided with a receptacle with a circuit breaker for protection against human shock or for connection to a transformer protected by an insulation transformer (rated capacity 3 kVA or less).

In addition, the power source of the place where water is used is specified to use the rated sensitivity current 15 ㎃ product separately. However, the operation time is the same, and it is a reality that only one rated sensitivity current is used by changing the resistance.

In the standard, the leakage trip time of the earth leakage breaker is limited to within 30 ms, and the maximum value of the operating time measurement of the product is measured up to 26 ms. Therefore, it is necessary to develop a technique to reduce the operation time. This is because the energization time can be reduced to reduce the risk of drawing.

Accordingly, there is a need in the art to develop a technique for improving the operation speed of the earth leakage breaker.

Korean Patent Registration No. 10-0029313 "Leakage current blocker with operation test circuit" Korean Patent Registration No. 10-0007057 entitled "Test Circuit Device of Leakage Breaker or Short Circuit Protection Relay" Korean Patent Publication No. 10-1094621 entitled " Electronic circuit and signal processing method of automatic restoration earth leakage breaker "

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a circuit breaker which is capable of reducing the current leakage trip time by 1 / 2 is reduced to reduce the energizing time at the time of an accident so as to reduce the risk of the inductance, thereby providing a system for improving the leakage trip operation time based on the electronic circuit design of the earth leakage breaker.

In addition, the present invention minimizes the joint structure of the handle frame constituting the trip driver, thereby eliminating the delay elements of the handle and frame structure, eliminating the lever action delay element, And to provide a system for improving a leakage trip operation time based on an electronic circuit design of an earth leakage breaker for reducing a trip operation time.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides an earth leakage circuit breaker system with a reduction in operation time of 50% for ensuring the safety of a vulnerable area for human shock based on the electronic circuit design of an earth leakage breaker according to an embodiment of the present invention, current transformer input 11; The resistor R 2 and the resistor R 3 of 100Ω are used to prevent IC breakage and malfunction caused by the surge by using the clamp diode 11a at the ZCT input terminal 11 in the electrical leak detecting electronic circuit portion 10 having the cap (Delay Capacitor-C _DLY ) (10) for providing a structure for limiting the size of a surge current by inserting a short circuit breaker (10); And a trip driver (100); The handle frame 130 of the trip driving part 100 is configured such that the engagement part of the core constituting the bobbin coil part 110 is in contact with the trip A trip bar 135 which is fixed to the latching groove of the bar 135 and operates by operation of a core; As the core is retracted by the magnetic field of the core, the bobbin, the yoke, the fix core and the coil in the bobbin coil part 110, When the trip bar 135 is pulled by the latching member fixed to the latching groove of the bar 135, the tripping bar 135 rises through the link 132 formed at the front end of the tripping bar 135, A lever 131 to be detached from the fixed contact end 121; .

At this time, it is preferable that the handle frame 130 contacts and blocks the fixed contact end 121 and the movable contact end 124 constituting the contact contacting portion 120.

In the present invention, it is preferable to use 20 kV for the delay capacitor (C _DLY ) for improving the leakage trip operation time connected to the IC 7101 4 and 5 pins of the earth leakage protection electronic circuit part 10.

In order to achieve the above object, the present invention provides an earth leakage circuit breaker system with a reduction in operation time of 50% for ensuring the safety of a human vulnerable area based on electronic circuit design of an earth leakage breaker according to another embodiment of the present invention, phase current transformer input 11; The resistor R 2 and the resistor R 3 of 100Ω are used to prevent IC breakage and malfunction caused by the surge by using the clamp diode 11a at the ZCT input terminal 11 in the electrical leak detecting electronic circuit portion 10 having the cap (Delay Capacitor-C _DLY ) (10) for providing a structure for limiting the size of a surge current by inserting a short circuit breaker (10); And a trip driver (100); (C _DLY) for improving the leakage trip operation time connected to the IC 7101 4 and 5 pins constituting the electrical leakage blocking electronic circuit part 10, ) Is used.

The system for improving the leakage trip operation time based on the electronic circuit design of the earth leakage breaker according to the embodiment of the present invention is a circuit design for the time delay phenomenon caused by the operation of the IC used in the electronic circuit of the earth leakage breaker within the reverse half period of the sine wave By optimizing the conventional short circuit trip time by a factor of 1/2, it is possible to reduce the power supply time at the time of an accident, thereby reducing the risk of the stocking.

In addition, the system for improving the leakage trip operation time based on the electronic circuit design of the earth leakage breaker according to another embodiment of the present invention is characterized in that, by minimizing the joint structure of the handle frame constituting the trip driver, It is possible to reduce the trip operation time by 2 to 3 ms by designing it with a light weight compared with the conventional handle frame.

Incidentally, the system for improving the leakage trip operation time based on the electronic circuit design of the earth leakage breaker according to another embodiment of the present invention is a system for improving the leakage trip operation time based on the trip driver design, Contact type to the two-point contact type, thereby providing the effect of reducing the trip operation time due to the development of the V-shaped contact point and the improvement of the contact point to which the ARC rebound structure is applied.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing an electronic circuit of an earth leakage breaker according to a conventional technique. FIG.
Fig. 2 is a circuit diagram of a conventional earth leakage cut-off circuit as shown in Fig. 1 and a circuit breaker having an operation time of 50% reduction technique for securing safety of a vulnerable area of a human body based on an electronic circuit design of an earth leakage breaker including the earth leakage breaker electronic circuit shown in Fig. And a trip operation time measuring device for the earth leakage breaker system.
Fig. 3 is a diagram showing the waveforms of a conventional leakage current interruption circuit and the results output from the operation time measuring apparatus with respect to the trip time. Fig.
4 is a circuit diagram showing an internal operation of a latch circuit which is a latch part of a conventional leakage current interruption circuit.
FIG. 5 is a diagram showing a measured waveform using a delay line for a delay capacitor (C _DLY ); FIG.
FIG. 6 is a diagram showing a measurement waveform using 10 kV for a delay capacitor (C _DLY );
7 is a diagram showing a measurement waveform using 20 kV for a delay capacitor (C _DLY ).
8 is a diagram illustrating an earth leakage breaker system to which an operation time is reduced by 50% for securing the safety of a vulnerable human body based on an electronic circuit design of an earth leakage breaker according to an embodiment of the present invention, .
Fig. 9 is a diagram showing a waveform of a total operation time of a leakage circuit breaker system to which an operation time reduction technique of 50% is applied for ensuring the safety of a vulnerable area of a human body based on electronic circuit design of a circuit breaker.
10 is a view showing a joint structure of a handle frame constituting a trip driving part of an earth leakage breaker system to which an operation time reduction technique of 50% is applied for ensuring the safety of an area susceptible to human shock based on the electronic circuit design of the earth leakage breaker of FIG.
FIG. 11 is a view showing a contact contact portion constituting a trip driving portion of an earth leakage breaker system to which an operation time reduction technique of 50% for securing the safety of a vulnerable area for human shock accident based on the electronic circuit design of the earth leakage breaker of FIG. 8 is applied;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In the present specification, when any one element 'transmits' data or signals to another element, the element can transmit the data or signal directly to the other element, and through at least one other element Data or signal can be transmitted to another component.

Fig. 2 is a diagram showing an operation time (time) for securing the safety of a vulnerable area in which a human body is susceptible to electric shock based on an electronic circuit design of an earth leakage breaker including the conventional leakage circuit breaker circuit 1 shown in Fig. 1 and the leakage current circuit breaker 10 shown in Fig. This is a trip operation time measuring device for a circuit breaker system with 50% shortening technology. In order to obtain the results of analyzing the trip operation time of domestic and overseas earth leakage breaker using the operation time measuring device for the leakage current interruption circuit 1 as shown in FIG. 1, a total of 30 times The leakage current test was carried out. The total earth leakage breaker used was for protecting the human body against electric shock. The rated sensitivity current was tested using 30mA, and the results were as shown in [Table 1]. That is, the results of testing the earth leakage breaker at home and abroad were measured as shown in [Table 1].

As shown in Table 1, the operation of the leakage current detector for industrial leakage current breaker starts from 21.5 to 24.5 mA according to the domestic manufacturers, and the maximum sensing current of the same product starts to operate at the reference potential. Do.

Here, the trip operation time by the earth leakage breaker having the earth leakage breaker circuit 1 under the rated sensitivity current of 30 mA was operated between 21 and 26 ms. Also, the operating time decreased with the increase of the test current and the leakage trip operation time of the earth leakage breaker having the earth leakage breaker circuit 1 was constantly measured to 210 to 440 mA.

On the other hand, in the sample test for the foreign product (IEC 61009-1), the operating time has been rapidly operated as the test current increased. In the case of the leakage circuit breaker using domestic electronic circuit, the initial operation is fast, but there is a limitation that the operation can not be performed below 15 ms according to the increase of the leakage current. In the case of the foreign product, the operation speed is rapidly changed.

3 is a diagram showing the waveforms of the conventional leakage current interruption circuit 1 and the results output from the operation time measurement device for the trip time. Referring to FIG. 3, waveforms and trip times of the electronic circuit are analyzed. The leakage current waveform at the ZCT (zero current transformer) input terminal has a sine wave waveform of 23.5 mA, the level judgment is voltage 0.8 V (level output) 47 ㎋ (C2 standard in Fig. 1), and Δt is an integral waveform of 3.3 ms.

Referring to FIG. 3, it is confirmed that the operation time differs by 2 to 3 ms depending on the load of the trip driver. It is confirmed that the output of the latch circuit of the IC according to the waveform of the leakage current is detected in the half period of 8.6 ms within the negative part. The current leakage circuit breaker detects the half cycle of the IC itself, and the integer C of the output of the IC 4, 5 latch circuit is 47 ㎋ (C2), so the maximum time of 26 ㎳ is detected at the minimum time of 8 ms.

Next, Fig. 4 shows a circuit diagram of the internal operation of the latch circuit, which is the latch part of the conventional leakage current blocking circuit. Referring to FIG. 4, when the leakage current blocking circuit IC Latch Part is analyzed, the delay capacitor (C _DLY ) is 47 V, the voltage (V _SCON ) is 1.2 V, and the Charging Current (I _DTA -I _SCON ) is 17 μA. Referring to FIG. 4, when operating time is analyzed, the operating time is measured differently according to the specification of the product (IC).

As a result of theoretically analyzing the integration cycle times of the 4th and 5th pins of the 7101 IC shown in FIG. 1, which is widely used in Korea, there is the following delay time of Equation (1). 1, I _DTA is the current flowing from the IC internal circuit to pin 4, and I _SCON is the current flowing through pin 5. V _SCON is the voltage between pin 5 and ground and C _DLY is the value of the capacitor.

The charging delay time generated by the cap for preventing malfunction at the output terminal of the IC is expressed by the following formula (2). I _O is the pin 7 output current and I _GT is the current applied to the SCR gate through capacitor C3. V _GT is the potential between the SCR gate and ground. At this time, the voltage is 0.62 V, and the current flowing at this time is 360 제외 excluding the difference between the two current values.

Since there is a delay time inside the earth leakage breaker, the delay capacitor (C _DLY ) 47㎋ should be changed to reduce the operating time.

Hereinafter, a change to the one-phase delay capacitor (C _DLY ) for improving the operation time of the electrical leak trip applied to the electrical leakage preventing electronic circuit part 10 for operating the trip coil by analyzing the electronic circuit characteristics of the electrical leakage circuit breaker according to the present invention will be described. I will look at it.

FIG. 5 is a photograph showing a measurement waveform using a voltage of 1 kV for the delay capacitor (C _DLY ). Referring to FIG. 5, it can be seen that the waveform of the leakage integrator waveform measured at the IC 7101 4, 5 pin constituting the electrical leakage blocking electronic circuit portion 10 is severely distorted by noise when the condenser 1 is used.

That is, when the waveform is severely distorted, the integral detection is difficult due to the shaking, and there is a fear of malfunction. Also, it is susceptible to conductive and radioactive noise and may malfunction.

Next, look at the case of using the 10㎋ Delay Capacitor (C _DLY) for Delay Capacitor (C _DLY) for improved leakage trip operation time. FIG. 6 is a photograph showing a measurement waveform using 10 kV, and shows a leakage current waveform and an integration period measurement waveform using 10 kV. Referring to FIG. 6, waveforms of the leakage voltage waveform at the ZCT input stage and the waveform of the output voltage of the latch circuit output integrator are measured, and the waveform is measured at a measurement time? T of 1.2 ms. The results show that the waveform of the signal is measured more precisely than the waveform using 1 나, but it can not be used due to intermittent malfunction.

Next, look at the case of using the 20㎋ Delay Capacitor (C _DLY) for Delay Capacitor (C _DLY) for improved leakage trip operation time. Fig. 7 is a photograph showing a measurement waveform using 20 kV. Fig. 7 shows an integrator leakage waveform and an integrator magnification measurement waveform measured at IC 4 and 5. Referring to FIG. 7, it can be confirmed that the integrator waveform is outputted only in the reverse direction of one cycle of the sine wave when the leakage signal is continuously applied. The RF radiation test shows the most stable operation at 20 ° C.

More specifically, the voltage of the latch circuit waveform was measured to be 0.8 V in the state of the electric leakage pulse waveform. For the pins 4 and 5, the integrator waveform was measured with the application of 20Ω, and the operating time was measured as 1.7 ms. If 20 ㎋ (C2) is used as the initial integrator waveform, the operation time can be up to 15 ㎳ but it is difficult to shorten the operation time within 8 ㎳. In order to reduce the trip time, the time can be adjusted by decreasing the cap (Delay Capacitor-C _DLY ) to 20 μV. If it is too low, there is a possibility of malfunction.

Next, by analyzing the possible improvement time (C2) according to the capacitor adjustment, the improved trip time according to the capacitor application (20㎋) is as shown in the following formula (3).

The charging delay time of the malfunction prevention cap is expressed by Equation (4) below.

When the time before the improvement is calculated by summing up the equations (1) and (2), about 3.4 ms is delayed. However, the sum of the equations (3) and (4) results in a delay of about 1.44 ms. The operating time improvement by capacitor adjustment decreased by 1.96 ms.

Referring to FIG. 8, the leakage current blocking electronic circuit unit 10 having an improved cap (Delay Capacitor-C _DLY ) as described above can be tested by using a clamp diode 11a at the ZCT input terminal 11, It provides a structure to prevent the malfunction and to limit the size of the surge current by inserting 100Ω resistance (R2, R3).

8, in order to shorten the trip operation time, the values of the capacitors C 2 and C 23 are also adjusted in the output terminals 4 and 5 and the operation portion of the SCR gate 10c, and the diodes D135, ZD8, and ZD9 are further disposed (10b-1, 10c-1). As shown in FIG. 9, the circuit operation of the earth leakage blocking electronic circuit 10 changes the detecting speed of the leakage current signal, thereby improving the half period detecting capability of the sine wave.

9 is a photograph showing the waveform of the total operation time of the system for improving the leakage trip operation time based on the electronic circuit design of the earth leakage breaker. 9, the operation time from the IC output to the SCR-Gate 10c was measured to be 4 ms, and the total trip operation time including the instruments was 11.4 ms. The oscilloscope .

In order to improve the operation speed of the system for improving the operation time of the ground fault tripping circuit based on the electronic circuit design of the earth leakage breaker, four kinds of small and standard type electronic circuits were constructed by using two kinds of earth leakage breaker ICs. For the test method, the trip operation time was measured using the same method as that for obtaining the results in [Table 1]. Type A and type B are standard type. Circuit type C and type D are small size breakers. The results of measuring the trip operation speed of the improved earth leakage breaker were measured as shown in [Table 2] below.

As shown in [Table 2], the operating speed of the specific ICs used for the B and D types was reduced compared to the conventional circuit breakers, but no decrease in the leakage current was found. As for Type A and Type C, the operating speed is decreased with increasing leakage current. This is because the slope of the current waveform is large due to the leakage current magnitude, and thus the detection speed is increased.

As a result, according to the present invention, in order to increase the trip operation time of the earth leakage breaker system to which the operation time is reduced by 50% for securing the safety of the vulnerable area for human shock accident based on the electronic circuit design of the earth leakage breaker, And the capacitance value of the capacitor was adjusted. The operating time of the leakage current blocking electronic circuit portion 10 was measured in accordance with the position of the voltage waveform and the duration of the leakage current when the leakage current input signal was generated under the condition that the rated voltage was applied and the maximum value of the measured time was 26 ㎳. This is a time lag phenomenon that occurs when the characteristics of the IC used in the earth leakage current blocking electronic circuit portion 10 are caused to operate within the half period of the sinusoidal wave. In the present invention, the C constant is 20 내 in the range where the circuit breaker does not malfunction, and a complementary circuit for preventing malfunction is additionally constructed as shown in FIG. The conventional circuit breaker starts with the specification of ≤26 ms and has a turn-on time of 3 ms (applying the basic time of 47 기본 of the output of the latch circuit) and a potential of 8.3 ms which is a half cycle when half- wave (16.6 ms) When the loss cycle was subtracted, the time of 4 ms was the time required to open the circuit breaker. Due to the tolerance of the adjustable components and other variables, it was possible to calculate the maximum value in the range of ≤ 10 ms to ≤ 15 ms based on 7101 IC standard time constant (integrator cap is 20.) While applying the integration time.

Therefore, we developed the circuit breaker by optimizing the delay element of the circuit breaker, and it was able to shorten the short circuit trip time required by the circuit breaker standard to 1/2. In other words, if the operation time of the human electrocution alarm circuit breaker is fast, the effect on the human body is minimized. Therefore, it is expected that safety of electric shock accident will be increased if it is used for medical equipment and human body electric shock accident prevention based on such technology development.

FIG. 10 is a view showing a state where the handle frame 130 constituting the trip driving part 100 of the earth leakage breaker system to which the operation time 50% reduction technique for securing the safety of the vulnerable area of the human body based on the electronic circuit design of the earth leakage breaker of FIG. Fig. Fig. 11 is a view showing a contact contact part 120 constituting the trip driving part 100 of the earth leakage circuit breaker system to which the operation time is reduced by 50% for securing the safety of the vulnerable area of the human body based on the electronic circuit design of the earth leakage breaker of Fig. Fig.

10, the handle frame 130 includes a lever 131, a link 132, a frame 133, a handle 134, a trip bar 135, bar 135 as shown in FIG.

The lever 131 allows the fixed contact end 121 and the movable contact end 124 constituting the contact contact portion 120 of FIG. 11 to be described later to be contacted and blocked.

A trip bar 135 which is operated by the operation of a core constituting the bobbin coil part 110 in FIG. 11 is provided and the engaging piece of the core is fixed to the engaging groove of the trip bar 135 do.

As the core is retracted in the bobbin coil part 110 by the magnetic field of a core, a bobbin, a yoke, a fix core, and a coil, The trip bar 135 is pulled by the latching member fixed to the latching groove of the trip lever 135 and the lever 131 coupled to the lower end of the link 132 through the link 132 at the front end of the trip bar 135 So that the movable contact end 124 is separated from the fixed contact end 121 by the action of the lever 131 moving to the lower end.

On the other hand, the handle 134 is attached to the upper portion of the link 132 through the rotation shaft through the through holes of the frames 133 so that when an external force is applied downward of the handle 134, And provides a structure in which the lever 132 connected to the link 132 is raised by applying pressure to the link 132.

Through the above-described structure, it is possible to remove the operation delay elements of the handle and the frame structure as well as the operation delay elements of the lever 131 through minimizing the joint structure of the handle frame 130.

In addition, since the conventional handle frame is designed to have a weight of about 200 g, the trip operation time of the trip driver 100 can be reduced by 2 to 3 ms by optimally designing 100 g or less.

11 is a view for explaining the contact contact portion 120 of the trip driving portion 100. FIG. Referring to FIG. 11, by providing a structure for changing from the one-point contact type to the two-point contact type in the conventional contact contact portion 120a of FIG. 11B, the thermal characteristic and the short- Shorten the trip operation time.

More specifically, the contact contact portion 120 includes a fixed contact 121, a fixed tip 122, a moving tip 123, a moving contact 124, Lt; / RTI > That is, the movable tip 123 of the movable contact end 124 abuts against the fixed tip 122 of the fixed contact end 121, thereby transmitting the contact signal.

The movable tip 123 has a dome shape with an end extending downward from the flat panel placed on the lower surface of the movable contact end 124. [ More specifically, the movable tip 123 has a dome shape extending from a flat panel such as a conventional movable tip 123a, and a "U-shaped" Or "horseshoe" arch shape.

Shaped panel having a curved surface whose central region faces downward so that the fixing tip 122 is attached to the insertion groove in the stationary contact end 121, and is formed by a V-shaped panel whose cross section or side faces downward. Here, the insertion groove of the fixed contact end 121 is formed in an inverted triangular shape. With this structure, the U-shape of the movable tip 123 located on the upper surface or the upper surface on the side surface and the V-shape of the lower tip 122 can be formed by two contacts, The disadvantage that the loads of the movable tip 123a and the movable contact end 124a are concentrated at one point by the one-point contact method of the contact portion 120a is improved.

That is, the contact contact part 120 provides a trip operation time reduction effect by the development of the V-shaped contact point and the improvement of the contact part to which the ARC rebound structure is applied, and the trip operation time shortened by the contact contact part 120 corresponds to 2 to 3 ms do.

The movable tip 123 is provided with a structure in which the vertical thickness of the movable tip 123 is increased while maintaining the vertical position of the contact which is in contact with the fixed tip 122 of the movable tip 123, And the time of contact between the fixed tip 122 and the fixed tip 122 can be shortened.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention , And are not intended to limit the scope of the present invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

10: Earth leakage cut-off electronic circuit
11: Zero-phase current transformer (ZCT) input
11a: clamp diode
100: Trip driver
110: Bob's coil part
120: Contact contact
121: Fixed contact
122: Fix tip
123: Moving tip
124: Moving contact
130: handle frame
131: Lever
132: link
133: frame (frame)
134: Handel
135: Trip bar

Claims (4)

A ZCT (zero-phase current transformer) input terminal 11; The resistor R 2 and the resistor R 3 of 100Ω are used to prevent IC breakage and malfunction caused by the surge by using the clamp diode 11a at the ZCT input terminal 11 in the electrical leak detecting electronic circuit portion 10 having the cap (Delay Capacitor-C _DLY ) (10) for providing a structure for limiting the size of a surge current by inserting a short circuit breaker (10); And a trip driver (100); The handle frame 130 of the trip driving unit 100 may be configured such that the handle frame 130 of the trip driving unit 100 is connected to the grounding circuit breaker,
A trip bar 135 which is fixed to the latching groove of the trip bar 135 and operated by the operation of a core, the stopper of the core constituting the bobbin coil part 110 is fixed; And
As the core is retracted in the bobbin coil part 110 by the magnetic field of a core, a bobbin, a yoke, a fix core, and a coil, When the trip bar 135 is pulled by the latching member fixed to the latching groove of the tripping bar 135, the tripping bar 135 rises through the link 132 formed at the front end of the tripping bar 135, A lever 131 to be detached from the contact end 121; , Wherein the first,
The handle frame 130 is characterized in that the fixed contact end 121 and the movable contact end 124 constituting the contact contacting portion 120 are brought into contact with and disconnected from each other,
And 20 kV for a delay capacitor (C _DLY ) for improving the leakage trip operation time connected to the IC 7101 4 and 5 pins constituting the earth leakage protection electronic circuit part 10,
A handle 134 is attached to the upper portion of the link 132 through a through hole of both side frames 133 so that an external force is applied to the handle 134 in a downward direction, The lever 132 connected to the link 132 rises due to the application of pressure,
The contact contact portion 120 is composed of a fixed contact end 121, a fixed tip 122, a movable tip 123 and a movable contact end 124 so as to be movable in the fixed tip 122 of the fixed contact end 121 The movable tip 123 of the movable contact tip 124 contacts the movable tip 123 of the contact tip 124 so that the movable tip 123 has a dome shape having an end extending downward from the flat panel placed on the lower surface of the movable contact tip 124 And the fixing tip 122 is formed in a panel shape having a curved surface with a central region facing downward so as to be attached to the insertion groove in the stationary contact end 121 and has a V- Wherein the circuit breaker is formed of an electronic circuit of a circuit breaker having an operating time of 50% to reduce the risk of human shock.
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