KR101976372B1 - Master breaker - Google Patents

Abstract

The present invention relates to a master (universal) circuit breaker and more particularly to a master (universal) circuit breaker which outputs an abnormal current of abnormal electric power to a power failure at a power source side failure, A master (universal) circuit breaker is disclosed that prevents the occurrence of an electrical accident in the power distribution system by causing the failure detector to detect and warn or shut off.
The disclosed master (universal) circuit breaker has a function of preventing a short circuit, a phase failure, a disconnection, a poor contact, a short circuit on a load side, an unbalanced overcurrent on the power supply side of the power distribution system, A fault output unit for outputting an abnormal current due to a leakage current on the load side, an unbalanced overcurrent, and an unbalanced current of the three-phase motor using a neutral line; And a failure detector for detecting an abnormal current of a neutral line output from the failure output unit, wherein the failure output unit includes: a first leg, a second leg, and a third leg; A first winding, a second winding, and a third winding; Wherein the first winding, the second winding, and the third winding have an iron core, wherein the first winding, the second winding, and the third winding each have the first winding, the second winding, And the third winding is provided with the first winding, the first winding, the coil wound in a zigzag manner in a direction opposite to the second winding, and the coil being one end connected to the neutral point, to the leg wound around the first winding and the second winding .

Description

Master breaker

The present invention relates to a master circuit breaker, and more particularly, to a master circuit breaker which alerts or blocks electric power anomalies due to an unbalanced current of a three-phase motor, a leakage current on a power source side, And a fault detector for connecting the fault output device to the power distribution system and outputting an abnormal current using the neutral line when the power failure occurs in the fault output device and preventing an electric accident from spreading to the power distribution system .

According to the classification of the fires in Korea in 2004, electric fire occupies the first place with 34%, and it has a much higher share than other fire causes including the second place tobacco fire (11.7%). A Study on Electrical Fire and Fire Safety System of Wiring System, Ryu Hongnam, 2006)

There are various causes of such electric fire, and the main factors are as follows.

First of all, with the short circuit, the shell of the electric wire is peeled off, or the heavy wire is placed on the wire which can be fixed with the nail, pin or the like to the electric wire, and the two strands of the electric wire are directly or indirectly contacted with each other, (Short-circuit) phenomenon occurs at this time, the flame is generated by the contact between the conductors, which leads to a fire.

The overload is caused by excessive use of electricity in excess of the rated capacity, unbalanced current, excessive heat at the connection of the electric wire or the electric appliance itself or the wiring device, and the electric power is generated by the fire.

In the case of a short circuit, electricity flows to the outside through an object other than a wire through which electric power flows. Leakage fires flow to a building or an auxiliary facility without passing through a portion designed for a current path, and heat accumulates.

The contact failure is caused by the resistance at the connection point of the wire (branching of the circuit, etc.) and the obstruction of the flow occurs. If the obstacle accumulates for a predetermined time or more, the coating of the wire becomes carbonized, causing the +, - do.

In addition, over-current, over-voltage, unbalanced power, and image harmonics due to image formation, disconnection, and the like are caused by electric fire, but there is a prior art attached, and detailed explanation will be omitted and only contact failure will be explained.

As such, the causes of electrical fires are diverse. Because the causes of fire in each cause are different from each other, the methods used to detect them are also different, and the types of protective relays are also various.

For example, currently used watt-hour meters are mechanical watt-hour meters and electronic watt-hour meters, and both have a terminal structure in the body of the watt-hour meter.

However, due to the installation of such terminal portions, there are many drawbacks such as difficulties in wiring the terminal portion of the watt hour meter, heat generation at the terminal portions, safety accidents at the terminal portions, unauthorized operation of the terminal portions, increase in the manufacturing cost,

Particularly, the number of wattmeter burnout caused by the contact failure of the watt hour meter, that is, the contact failure between the terminal portion of the watt hour meter and the electric wire, has increased compared to the past.

When the fault accumulates over a certain period of time, the temperature rises and the sheath (insulation) of the wire becomes carbonized and softened. Finally, That is, the +, - electrodes which are the conductors of the electric wires collide with each other, so that the electric power meter is burned down and the electric fire continues.

Concretely, as the resistance of the contact surface increases due to the contact failure of the electric wire, the heat of the conductor (electric wire) connection surface rises, and the heat of the elevated high temperature damages the insulation between the conductors (electric wires) . In addition, arcing occurs due to contact between the conductors, and the arc heat causes the appliance to be burned and further spread to the electric fire.

Generally, the main causes of burnout and electric fire due to deterioration of electric appliances are short-circuit, over-current, short-circuit, and contact failure.

Up to now, the development and dissemination of equipment capable of preventing short-circuit, over-current, and short-circuit-related fire on the load side has been achieved by continuous efforts to reduce the occurrence of electric fires except short-circuit, short-circuit, ought.

In other words, a lot of techniques have been developed to detect short-circuit on the load side, short-circuit, overload, etc. However, technology to detect the cause of disconnection, phase loss, short- In the case of KEPCO, KEPCO is inspecting distribution lines with a lot of people and budget by infrared (thermal image) camera in order to find faulty distribution lines.

For example, an apparatus for detecting an existing contact failure and an electrical abnormal state generally detects a temperature, detects voltage and current changes, changes in harmonics (VTHD, ITHD), etc. to detect contact failure, The technology must not only measure various electrical quality factors, install a temperature sensing device separately, but also accurately analyze the electric phenomenon that occurs when a contact failure occurs.

In other words, the conventional technique of detecting through harmonic variation is that VTHD and ITHD are seriously increased when a customer uses a welding machine and an arc load, and even if the value is in a steady state depending on light load, heavy load and peak load, And therefore it is not certain whether it is due to the contact failure.

Also, in the conventional technology for detecting the contact failure from one factor of the voltage value or the current value, when the voltage and the current source are separated (the customer supplied separately by PT and CT), there is a limit have.

Therefore, there is a desperate need for technologies that can prevent the electric appliance from burning and electric fire by accurately determining the cause of the contact failure.

In order to solve all the problems caused by such contact failure and image formation, disconnection, unbalanced overvoltage, and overcurrent, conventionally proposed technology is disclosed in Korean Patent Application Publication No. 10-2009-0004718 (2009.12. (Hereinafter referred to as " Prior Art 1 "), Registered Patent Registration No. 10-1109024 (Registered on Jan. 17, 2012) And a detection method) (hereinafter referred to as "Prior Art 2"), Korean Patent Registration No. 10-1320373 (Registered on October 15, 2013) (Name of invention: Image reconstruction apparatus equipped with a transformer and its installation method) (Hereinafter referred to as " Prior Art 3 ").

The disclosed 'Prior Art 1'

It is possible to protect the user from the risk of fire by detecting the contact failure by the change of current rms value, power factor, current instantaneous value, harmonics, etc., and by cutting off the power accordingly, and there are five factors It is possible to detect a contact failure more accurately by making a determination that the contact failure is caused when two or more factors of the contact failure are satisfied and further to inform the user terminal about the blocking situation due to the contact failure, .

The disclosed 'Prior Art 2'

A power factor calculator for calculating a power factor value in units of a total measurement time and a measurement time set based on the detected voltage and current values and a voltage and current detector for detecting a voltage and a current supplied to a customer, A contact failure judgment unit for judging that the contact failure is judged to be a contact failure when the power factor value calculated in units of measurement time is continuously decreased in a range smaller than a predetermined reference value and a contact failure signal when it is judged as a contact failure by the contact failure judgment unit And an interface unit for transmitting the electric power to the remote server. In addition, it is configured to prevent contact failure of the watt hour meter and to prevent burning of the electric device (watt hour meter) due to contact failure.

The disclosed 'Prior Art 3'

In the 3-phase 4-wire distribution system, it detects when an unbalanced fault current occurs in the phase line of the power line, disconnection of the neutral line, and the power line and the neutral line, and restores the normalization of power line image, disconnection of neutral line and power unbalance, So as to maintain normal power.

1. Published Patent Publication No. 10-2009-0004718 (Dec. 1, 2009) 2. Patent Registration No. 10-1109024 (Registered on January 17, 2012) 3. Registration Patent Registration No. 10-1320373 (Registered on October 15, 2013)

However, the above-described conventional technique has a problem in that, when a short circuit, a contact failure, an image formation, or a disconnection occurs in a power distribution system, a short circuit (ground fault) There has been a problem that electrical equipment is burned out or an electric fire or power failure occurs due to influx or the like.

In addition, there is no detection method for leakage current and short circuit abnormality on the load side of the three-phase motor in the power distribution system, so there is a problem that the electric shock due to the short circuit and the unbalance abnormality on the three-phase load side can not be detected.

Also, in the case of electrical engineers who have to cut off the power supply to the power system due to a short circuit due to a short circuit or a short circuit, excessive cost of repairing a broken wire, There was a problem.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the conventional power distribution system,

The problem to be solved by the present invention is to provide a power supply system capable of outputting an abnormal current in real time when a short circuit, an image formation, a disconnection, a short circuit, a contact failure, a short circuit, an overcurrent, The present invention provides a master circuit breaker for preventing an abnormal overvoltage, an abnormal overcurrent, and an abnormal current from occurring due to a defective or unbalanced current, or an electric accident such as an electric shock or a fire due to an overvoltage, an overcurrent, or an abnormal current.

Another problem to be solved by the present invention is to provide a system and method for real-time alarm of a power abnormality caused by a current unbalance in a power distribution system due to current unbalance, faulty connection, And to provide a master breaker for preventing an electric accident from occurring.

Another problem to be solved by the present invention is that if power failure occurs due to current unbalance of electric leakage, contact failure, phase loss, disconnection, and three-phase load in the power distribution system, the power abnormality is cut off and electric shock, fire, appliance burnout, A master breaker for preventing an electric accident caused by an accident.

In order to solve the above problems, a " master breaker "

In case of faulty contact in the electrical system of the power distribution system, faulty phase power due to contact failure is supplied by neutral and solid phase, connected to 3-phase 4-wire power distribution system. Phase neutral current is recovered and supplied by using three phases. The unbalanced current on the power supply side and the unbalanced voltage on the load side are improved to equilibrium by using the neutral line. Phase power source is compensated in the equilibrium direction by using the neutral line and the positive phase even when the load of the three-phase motor load is unbalanced, so that the contact failure, phase loss, disconnection, unbalance current, unbalance voltage, At least one of the faulty outputs is supplied to the faulty electricity supply, recovery, improvement, correction, It is characterized by including the failure to writer to block.

The fault detector comprises:

If the neutral fault of the fault output device is detected by the image transformer and the detected abnormal current detection value is delivered to the existing leakage alarm device and compared with the preset value of the leakage alarm device, And the power is immediately cut off through the existing earth leakage breaker equipped with the video current transformer.

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The fault output device includes:

A first leg and a third leg which are iron cores; Wherein the first winding is wound on the first leg, the second winding is wound on the third leg, the third winding is wound on the third leg, and the third winding is wound on the third leg, One end of the first winding, the second winding, and the third winding are wound in a zigzag manner in the first leg and the third leg in the opposite direction in which the first winding and the second winding are wound, The other end of the first winding, the second winding, and the third winding is connected to a neutral wire to generate a current in a neutral wire at a time of a short circuit, a contact failure, a disconnection, an image formation and an unbalanced current at the power line or the neutral line, And a second leg serving as a passage through which the magnetic flux generated in the third leg circulates

The fault output device includes:

The phase of the S phase is added by adding the reverse phase of S phase and the phase of T phase to output the phase of R phase, or the phase of S phase is added by adding the reverse phase of R phase and the reverse phase of T phase, And outputs an abnormal current for recovering a short circuit, a disconnection, an image formation, a contact failure, and an unbalanced current.

The fault output device includes:

The phase of the R phase is output by adding the reverse phase of the S phase or the reverse phase of the T phase and the positive phase of the R phase, or the phase of S phase is output by adding the reverse phase of R phase or the inverse phase of T phase to the positive phase of S phase, Or a phase in the T phase is added by adding the inverse phase of the S phase and the positive phase of the T phase to output a neutral line fault current for recovering leakage, disconnection, image formation, contact failure, and unbalanced current.

The fault output device includes:

Each of the windings wound on each of the legs at a time of occurrence of the electric leakage, the image formation, the disconnection, the contact failure, and the unbalanced electric current generates mutual electromagnetic induction at a ratio of 1: 1, And outputs an abnormal current.

The fault detector comprises:

In order to protect the power distribution system from unbalance due to electric leakage, ground fault, disconnection, phase failure, contact failure, abnormal over-current, abnormal over-voltage abnormality abnormality of the power distribution system, abnormal current output from the fault output device is detected by a video current transformer or power detector, , A wiring breaker, a fuse, a circuit protection circuit breaker, and an alarm generator.

The power detector includes:

And detects the voltage and current of the input / output of the failure output device and outputs it to the outside.

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According to the present invention, it is possible to alleviate electric power errors due to unbalanced currents of the three-phase electric motors in real time by electric power failure, electric shock, short circuit, faulty contact, short circuit on the load side, There is an advantage that an electric accident such as electric appliance burnout or electric fire can be prevented from occurring.

Further, according to the present invention, electric power abnormality due to an unbalanced current of a three-phase motor is cut off by electric power failure, electrical failure, disconnection, disconnection, short circuit, overcurrent, There is an advantage that an electric accident such as electric appliance burnout or electric fire can be prevented from occurring.

In addition, according to the present invention, unbalanced power and image harmonics can be output to the fault output unit connected to the power distribution system, even when the normal power is normally used.

FIG. 1 is a waveform diagram of a change in voltage and current when an arc is generated due to a contact failure. FIG.
Fig. 2 is a waveform diagram of a change in voltage and current of normal power. Fig.
3 is a circuit diagram and configuration of a master (universal) circuit breaker 200 in a power distribution system 100 according to a preferred embodiment of the present invention.
4 is a circuit diagram and leakage power recovery vector diagram of various embodiments of a fault output device.
5 is a circuit diagram of various embodiments of a fault output device.
FIG. 6 is a graph showing the relationship between the power supply side and the load side connection circuit diagram and the test result table (when the phases are turned off (A, B, and C) It can be seen that an abnormal current is generated in the neutral line and it is the result of testing with the product of the above-mentioned prior art 3.}

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

3 is a configuration and a circuit diagram of a master (universal) circuit breaker 200 according to a preferred embodiment of the present invention. The circuit breaker 200 prevents abnormal power from flowing into the fault output device 220 connected to the power distribution system 100 and the power distribution system. And a fault detector 210 for detecting an abnormal current to detect an abnormal current.

The master (universal) circuit breaker 200 can be implemented as a single module and can be carried and checked for electric failures (leakage current, phase loss, disconnection, poor contact, short circuit on the load side, overcurrent, unbalanced current) It is advantageous in that it can be provided in the entire distribution and alarmed or built in the circuit breaker to cut off power in case of power failure or to easily apply it to existing power supply devices to alarm or block abnormal power.

The power distribution system 100 means a general power distribution system that supplies power to three-phase three-wire type (R, S, T) or three-phase four-wire type (R, S, T, N).

The master (universal) circuit breaker 200 is connected to the electrical equipment of the power distribution system 100 and detects leakage power for detecting abnormality in electrical power generated when electrical leakage, contact failure, phase loss, disconnection, The fault current detector 220 detects an abnormal current output from the fault output device 220 and outputs the fault current to the fault detector 220. The fault current detector 220 detects the fault current output from the fault detector 220, And outputs a power abnormality caused by a short circuit, a contact failure, an image formation, a disconnection, and an unbalanced current so that the power abnormality can be recognized from the outside, or the power can be cut off by the detected abnormal current.

The master (universal) circuit breaker 200 includes a fault output unit 220 receiving the power abnormality and generating an abnormal current for detecting the power abnormality when the power abnormality occurs, And a failure detector 210 for detecting an abnormal current generated by the failure output unit 220. The failure detector 220 is operated by the failure output unit 220 to determine whether or not the output power is abnormal, Self-blocking.

When a failure occurs in the power supply side of the power distribution system 100, the failure output device 220 uses the potential difference and the phase difference between the phase and the phase, the potential difference between the neutral point and the phase, and the phase difference The legs 120, 130 and 140 and the coiled windings P1, P2, P3 and P4 are supplied with electromagnetic induction to supply the failure detector 210 with a fault situation due to the leakage, disconnection, And the first leg P1 and the third leg P2 are wound in opposite directions to each other and the third leg 140 is wound with the second winding P2 and the third winding P2 P4 are wound in opposite directions so that one end of the first winding P2 and the third winding P2 is connected to the neutral line N and the other end of the third winding P2, P2, and P4 are wound on the first leg 120 and the third leg 140, respectively, to prevent leakage, disconnection, image formation, contact failure, short circuit on the load side, Electrically connected to each other on the current unbalance for over current output for a failure of the second leg and is preferably the passage acts to discharge a different magnetic flux induced in the first leg and the third leg.

4 is a simplified schematic circuit diagram and a phase vector diagram 220-1 of the fault output device 220 shown in FIG. 4. The input A, the input B, the input C, and the load side And if the input A of the faulty output device 220 is grounded, disconnected, or phase-lagged, the input A disappears or its phase is changed so that only the power of the input B and the input C And the input A shown in the vector drawing 810 included in FIG. 4 is restored in real time in the order of the vector diagrams 810-1, 810-2, and 810-3 of the recovery method at the time of the disconnection, And an abnormal current due to the recovery power is generated at the neutral line.

In addition, when the input B of the fault output device 220 is grounded, disconnected, or phase-shifted, the input B disappears and only the power of the input A and the input C is supplied. B can recover the power input A in real time in the order of the vector diagram of the recovery method of disconnection (820-1, 820-2, 820-3), the abnormal current due to the recovery power occurs in the neutral line,

In addition, when the input C of the fault output device 220 is grounded, disconnected or phase-wise, the input C disappears, and only the power of the input A and the input B is supplied. The input shown in the drawing 830 C can recover the power input C in real time in the order of vector diagrams (830-1, 830-2, 830-3) of the recovery method in case of disconnection, and an abnormal current is generated.

배의 전류가 고장출력기에 흐르게 되어 이상전류가 출력되는 것이다.More specifically, the failure output device 220 shown in FIG. 4 has a winding with a voltage ratio of 1: 1 respectively, and the input A is destroyed as shown in the vector diagram 810-1 The input B, the input C, and the neutral line power source, which maintain a phase angle of 120 degrees with each other, are input, and the voltage of the input B is input to the other end of the coil (coil) P2, one end of which is connected to the neutral point N The phase voltage in the direction opposite to the phase of the voltage induced in the winding P2 by 180 degrees with respect to the neutral point is also applied to the winding P4 wound on the same leg as the leg 870 wound with the winding P2, The input vector C having a phase difference and a potential difference of 120 degrees from the input B is connected to one end of the winding P3 so that the power source is turned on And the upper side generated in the winding P4 The voltage in the opposite direction to the input B having a phase difference from the input C is applied to the other end connected to the winding P3 and eventually a voltage equal to the phase of the input A that is lost in the winding P3 is generated, 2) state, and the winding P3 is subjected to electromagnetic induction in which the opposite phase voltage of the phase of the winding P3 is generated in the winding P1 wound in the opposite direction in the same leg 860 in which the winding P3 is wound If the winding P1 connected at one end to the neutral point N generates an extinct power input A which is 180 degrees opposite to the phase of the winding P3 with respect to the neutral point, the neutral current flows through the input B and the input C of

The current of the stator flows to the fault output device and an abnormal current is outputted.

의 전류86.6이 흐르게 되어 R상의 100을 복구하게 되고 결국 N상에는 이상전류 86.6이 발생되며 불평형 부하에서 중성선(N)이 단선되면 부하 측에 과전류가 흐르지 않도록 복구하기 위해 A(R), B(S), C(T)상은 상기 고장출력기의 입력A, 입력B, 입력C에 똑같은 전류를 공급하게 되어 상기 고장출력기는 부하측 중성선(N)에 전류를 공급하여 상기와 같은 원리로 중성선(N)에 이상전류가 발생되고 삼상의 전동기 부하가 A상이 단선되거나 결상이 되면 고장출력기는 부하 평형을 유지하기 위해 상기와 같은 원리로 B, C상과 중성선(N)의 전류를 사용하게 되어 결국은 이상전류가 발생되는 것이며, 전원 측과 부하 측의 누전발생도 복구하기 위해 같은 원리로 중성선(N)에서 이상전류가 발생되는 것이다.In the literature, the electric theory by vector is A (R) + B (S) + C (T) = N, When a balanced current flows, the current flowing in N is zero and no current flows. However, if the A phase is disconnected or fired, if the fault output device is to supply electricity to the A phase using the power of B, C and N phases to recover the A phase, the B phase and the C phase are 50, and the N phase is 50 ×

(R), B (S), and R (R) to recover 100 of the R phase due to the flow of current 86.6, resulting in an abnormal current 86.6 on the N phase. If the neutral line N is disconnected in the unbalanced load, ) And C (T) supplies the same current to the input A, the input B and the input C of the failure output device, so that the failure output device supplies a current to the load side neutral line N and outputs the current to the neutral line N If an abnormal current is generated and the three-phase motor load is disconnected or phase-A, the fault output unit uses the currents of B, C, and neutral lines (N) in the same manner as described above to maintain load balance, And an abnormal current is generated on the neutral line (N) on the same principle in order to recover the occurrence of a short circuit on the power source side and the load side.

When an abnormal current of the neutral line N is generated in the fault output device 220, the fault detector 210 immediately detects the leaked current and transmits an abnormal current detection value to the alarm generator 230 or the breaker 230, Generators and circuit breakers operate. (In conventional electric equipment, UVL (Low Voltage Relay) or POR (Phase Relay) is used to detect the phase, but it is difficult to detect when the price is high and the neutral line is disconnected. , In particular, the contact failure is not easily detected accurately)

4, when the input B is disappeared, the input A and the input C are connected to the power source 820-1 only when the input B is lost. The power of the input A is input to the other end of the winding (coil) P1 whose one end is connected to the neutral point N, and the winding P1 is connected to the leg 860 wound with the winding P1 The electric power input C is connected to one end of the winding P3. The winding P3 is connected to the input A and the neutral point, and the input power C And a phase and a voltage opposite to the phases and voltages induced in the winding P1 by the power input A are generated in the winding P3, State is displayed, and the vector at the other end of P3 When the induced power of P3 is supplied to the wound winding P4, a vector of the state of the drawing (820-2) is generated, and the winding P4 is wound on the same leg as the winding 870 wound with the winding P4 The electromagnetic wave is guided to the winding P2 wound in the opposite direction of P4 with reference to the neutral point. Eventually, the recovery voltage is induced in the winding P2 as well, and the vector of the state of the figure 820-3 appears. .

Even if the input A disappears or the input B disappears even if the input C is not supplied with power, the input A or the input B is converted into the electromagnetic induction by using the phase difference and the potential difference between the three phases and the phase difference and the potential difference between the phases, Input C is restored for the same reason as how it is restored. In the figure 830, the input C is not fed, and the power input C is removed so that the power input A and the power input B are connected to the windings P 1 and P 2 connected respectively to the neutral points, The winding P 1 and the winding P 2 take the form of V wiring with reference to the neutral point and the winding P 2 induces electromagnetic induction with the phase and voltage of the winding P 4 in the opposite direction of 180 degrees, P1 conducts electromagnetic induction with the phase and voltage in the opposite direction of 180 degrees to the winding P3, and the power input C is recovered as shown in FIG. 830-3.

When three-phase power is applied to the input A, the input B, and the input C, the phase of each phase is maintained at 120 degrees, and the center of the three phase power is naturally generated, so that the windings P1, P2, P4), the neutral line appears, and even though the input power is not inputted due to the ground fault, disconnection, and phase loss at the power supply side of the power distribution system due to one line failure, the neutral current is normally output using the three- Is supplied with an abnormal current.

In addition, even when the three-phase motor power of the abnormal unbalanced current is supplied due to an abnormal current in the power distribution system due to the abnormal state of the output of the prior art 3 and the embodiment of FIG. 5, (Fault detector is set by the breaking capacity of the fault output device, and the power detector is set up by the fault detector), and the fault detector is operated and the abnormal power is prevented from flowing into the power distribution system. Or a circuit breaker or circuit breaker or a fuse or circuit protection circuit breaker)

That is, according to the present invention, if a power failure occurs due to an electrical equipment leaking, a contact failure, an image formation of a power line, a disconnection of a neutral line, a short circuit of a load side, or an unbalanced current of a three-phase motor in the power distribution system 100, And outputs an abnormal current that receives power abnormality and replenishes the power abnormality in real time and supplies the abnormality current to the power distribution system 100 where the power abnormality occurs. When the failure detector 210 detects the abnormal current due to the inflow of an abnormal current, Or over power. The tripping device for breaking the circuit breaker can be blocked by using the circuit of the existing circuit breaker or by using the existing leakage alarm device, The administrator can quickly take the follow-up action, thereby preventing a system malfunction and electric fire accident that may occur later due to power abnormality.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

100 - Distribution system (electrical system of distribution system)
120 - first leg, 130 - second leg, 140 - third leg
200 - a master (universal) circuit breaker according to a preferred embodiment of the present invention
210 - Fault detector
220 - Fault output unit
230 - Circuit breaker (wiring, short circuit) or alarm generator
P1 - a first winding wound on the first leg
P2 - the second winding wound on the third leg
P3 - the third winding wound on the first leg
P4 - the third winding wound on the third leg
A (R), B (S), C (T) - power lines,
N - Neutral

Claims (9)

In case of faulty contact in the electrical system of the power distribution system, faulty phase power due to contact failure is supplied by neutral and solid phase, connected to 3-phase 4-wire power distribution system. Phase neutral current is recovered and supplied by using three phases. The unbalanced current on the power supply side and the unbalanced voltage on the load side are improved to equilibrium by using the neutral line. Phase power source is compensated in the equilibrium direction by using the neutral line and the positive phase even when the load of the three-phase motor load is unbalanced, so that the contact failure, phase loss, disconnection, unbalance current, unbalance voltage, At least one of the faulty outputs is applied to the faulty electricity supply, recovery, improvement, correction, or supplementation with normal power, The master breaker comprising: a malfunction detector for detecting malfunction of the master breaker; The apparatus of claim 1, wherein the fault detector
If the neutral fault of the fault output device is detected by the image transformer and the detected abnormal current detection value is delivered to the existing leakage alarm device and compared with the preset value of the leakage alarm device, And the power is immediately cut off through the existing earth leakage breaker equipped with the video current transformer. The apparatus according to claim 1 or 2, wherein the failure output device
A first leg and a third leg which are iron cores; Wherein the first winding is wound on the first leg, the second winding is wound on the third leg, the third winding is wound on the third leg, and the third winding is wound on the third leg, One end of the first winding, the second winding, and the third winding are wound in a zigzag manner in the first leg and the third leg in the opposite direction in which the first winding and the second winding are wound, The other end of the first winding, the second winding, and the third winding is connected to a neutral wire to generate a current in a neutral wire at a time of a short circuit, a contact failure, a disconnection, an image formation and an unbalanced current at the power line or the neutral line, Further comprising a second leg serving as a path through which the magnetic flux generated in the third leg circulates. The apparatus according to claim 3,
The phase of the S phase is added by adding the reverse phase of S phase and the phase of T phase to output the phase of R phase, or the phase of S phase is added by adding the reverse phase of R phase and the reverse phase of T phase, And outputs an abnormal current of a neutral line for recovering a short circuit, a disconnection, an image formation, a contact failure, and an unbalanced current. The apparatus according to claim 1 or 2,
The phase of the R phase is output by adding the reverse phase of the S phase or the reverse phase of the T phase and the positive phase of the R phase, or the phase of S phase is output by adding the reverse phase of R phase or the inverse phase of T phase to the positive phase of S phase, Or the phase of S phase and the phase of T phase are added to each other to output a phase of T phase to output an abnormal current of neutral line for recovering leakage, disconnection, image formation, contact failure, and unbalanced current. The apparatus according to claim 1,
Each of the windings wound on each of the legs at a time of occurrence of the electric leakage, the image formation, the disconnection, the contact failure, and the unbalanced electric current generates mutual electromagnetic induction at a ratio of 1: 1, And outputs an abnormal current. The fault detector according to claim 1 or 2,
In order to protect the power distribution system from unbalance due to electric leakage, ground fault, disconnection, phase failure, contact failure, abnormal over-current, abnormal over-voltage abnormality abnormality of the power distribution system, abnormal current output from the fault output device is detected by a video current transformer or power detector, , A wiring breaker, a fuse, a circuit protection circuit breaker, and an alarm generator. 8. The apparatus of claim 7,
And detects the voltage and current of the input / output of the failure output device and outputs it to the outside. delete

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