KR100795037B1 - Zero-pharse harmonic reduction device having protection function of overload - Google Patents

Zero-pharse harmonic reduction device having protection function of overload Download PDF

Info

Publication number
KR100795037B1
KR100795037B1 KR1020070081539A KR20070081539A KR100795037B1 KR 100795037 B1 KR100795037 B1 KR 100795037B1 KR 1020070081539 A KR1020070081539 A KR 1020070081539A KR 20070081539 A KR20070081539 A KR 20070081539A KR 100795037 B1 KR100795037 B1 KR 100795037B1
Authority
KR
South Korea
Prior art keywords
reduction device
harmonic reduction
temperature
protection function
zero
Prior art date
Application number
KR1020070081539A
Other languages
Korean (ko)
Inventor
송규창
김용배
양영철
Original Assignee
송규창
김용배
양영철
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 송규창, 김용배, 양영철 filed Critical 송규창
Priority to KR1020070081539A priority Critical patent/KR100795037B1/en
Application granted granted Critical
Publication of KR100795037B1 publication Critical patent/KR100795037B1/en
Priority to CN2008101345437A priority patent/CN101369730B/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Protection Of Transformers (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

A zero-phase harmonic reduction device having a protection function of overload is provided to be operated efficiently by having a temperature switch operated according to a temperature of an iron core and a coil. In a zero-phase harmonic reduction device(20) having a protection function of overload, a plurality of feeder MCCBs(Molded Case Circuit-Breakers) are connected to a power distribution board(10). Three-phases(A,B,C) and a neutral line(N) of a power source are connected to phase lines(A,B,C) and a neutral line(N) of a connection transformer of the zero-phase harmonic reduction device through an MCCB1 of the power distribution board. A cutoff switch(TS1) is interposed in the neutral line of the connection transformer. The cutoff switch is a bimetal to be opened over a standard temperature and shorted below the standard temperature.

Description

과부하 보호기능을 구비한 영상고조파 저감장치{ZERO-PHARSE HARMONIC REDUCTION DEVICE HAVING PROTECTION FUNCTION OF OVERLOAD}ZERO-PHARSE HARMONIC REDUCTION DEVICE HAVING PROTECTION FUNCTION OF OVERLOAD}

본 발명은 판넬용 영상고조파 저감장치에 관한 것으로, 보다 상세하게는 분전반에 설치하여 결선변압기가 설정된 일정온도이상 상승 시 회로를 차단하고, 다시 결선 변압기의 온도가 상기 일정온도 미만으로 낮아지면 회로를 자동 복구하는 과부하 보호기능을 구비한 영상고조파 저감장치에 관한 것이다.The present invention relates to an image harmonic reduction device for a panel, and more particularly, is installed in a distribution board to cut off a circuit when a wiring transformer rises above a predetermined temperature, and again when the temperature of the wiring transformer falls below the predetermined temperature. An image harmonic reduction device having an overload protection function for automatic recovery.

근래, 산업 현장은 물론 가정에서도 고조파를 많이 발생하는 전기기기(디지털 제어)의 사용이 급증하여 전력계통에 전압 및 전류파형이 왜곡되고 있다. 고조파를 발생원으로는 사이리스터 응용기기 외에 인버터 구동기기, 변압기, 전자기기 등이 있으며, 고조파의 발생은 무효전력증가, 전력기기의 과열, 기기의 이상, 소음, 진동, 보호기기의 오동작, 통신유도장애, 중성선 과열을 초래하여 그 피해가 점점 커지고 있는 바, 고조파의 제거가 반드시 필요하게 된다.In recent years, the use of electrical equipment (digital control), which generates a lot of harmonics, in industrial sites as well as at home, has rapidly increased, distorting voltage and current waveforms in power systems. Sources of harmonics include thyristor application devices, inverter drive devices, transformers, and electronic devices.The generation of harmonics includes increased reactive power, overheating of power devices, abnormalities of the device, noise, vibration, malfunction of protection devices, and disturbance of communication induction. As a result of this, the neutral wire overheats and the damage is getting bigger, so it is necessary to remove the harmonics.

한편, 영상고조파 저감장치는 철심에 다중의 권선이 권취되며, 2개의 위상이 서로 반대로 결선되어 영상분 자속은 상쇄(cancel)되고, 정상 및 역상분 자속은 상쇄되지 않는 구조로 제작되어 영상분 고조파를 흡수 제거하는 용도로 사용된다.On the other hand, the image harmonic reduction device is wound with multiple windings on the iron core, the two phases are connected to each other in reverse, the image magnetic flux canceled (cancel), the normal and reverse phase magnetic flux is manufactured in a structure that does not cancel the image harmonics It is used to absorb and remove.

또한 상기 고조파 중에서도 저차수인 3차 고조파의 발생량이 최고로 많기 때문에 영상 고조파저감장치를 사용하면 고조파를 저비용으로 제거할 수 있게 된다.In addition, since the generation of low order third harmonics is the highest among the harmonics, harmonics can be removed at low cost by using an image harmonic reduction device.

이에 종래 영상고조파 저감장치는 영상고조파인 3차 고조파에 대하여는 낮은 임피던스로 되기 때문에 고조파 전류를 흡수하여 계통의 고조파를 감소시키거나, 계통에서 발생하는 고조파의 양이 자체 용량보다 많은 경우에는 과전류가 흘러 과부하로 되어 권선 및 철심에서 발생하는 열로 인하여, 소손되어 화재의 우려가 있었다.Therefore, the conventional image harmonic reduction device has a low impedance with respect to the third harmonic, which is the image harmonic, so it absorbs harmonic currents to reduce the harmonics of the system, or when the amount of harmonics generated in the system is larger than its capacity, an overcurrent flows. Due to the heat generated from the windings and the iron core due to overload, there is a risk of fire.

따라서 이런 문제점인 과전류를 방지하고자 배선용 차단기를 사용하여 영상고조파저감장치를 보호 하고 있다. 즉 상기 배선용 차단기는 정격전류보다 큰 전류의 전류가 지속적으로 흐르면 회로에서 영상고조파저감장치를 분리하여 보호토록 한 것이다.Therefore, in order to prevent this problem, overcurrent, a circuit breaker is used to protect the image harmonic reduction device. That is, the circuit breaker is to isolate and protect the image harmonic reduction device from the circuit if a current of a current larger than the rated current continuously flows.

그러나 상기 종래의 영상고조파 저감장치는 다음과 같은 문제점을 가지게 되었다.However, the conventional harmonic reduction apparatus has the following problems.

첫째, 전류의 크기로만 영상고조파 저감장치를 보호하기 때문에 사용장소의 온도에 따른 보정이 전혀 되지 않았으며, 둘째, 3상(R.S.T) 중에서 가장 큰 전류로 동작(회로 분리)하므로 고조파 제거 측면에서 효율적이지 못한 문제점과, 셋째, 분전반에 설치되는 경우, 순간적으로 고조파 발생량이 증가한 경우 배선용 차단기가 작용하면 자동으로 재투입이 안되어, 이를 수동으로 전원 재투입을 해주어야 함으로 별도의 관리자가 필요하였으며, 상기 관리자가 설치된 분전반에 가서 점검할 때까지 고조파 흡수역할을 수행하지 못하게 되는 문제점과, 넷째 사이즈가 크고 무거워 부하근접에 판넬 설치가 불가능하여 효율적인 고조파 제거가 되지 못하는 실정이다.First, since it protects the image harmonic reduction device only by the amount of current, no correction was made according to the temperature of the place of use. Second, since it operates with the largest current among three phases (RST) (circuit is separated), it is effective in terms of harmonic elimination. Third, when installed in the distribution panel, when the harmonic generation amount increased momentarily, when the circuit breaker acts, it is not automatically re-input, and a separate manager is required because it must be manually re-powered. The problem of not being able to perform the harmonic absorption role until the inspection to go to the distribution panel is installed, and the fourth size is large and heavy, it is impossible to remove the harmonics because the panel can not be installed in close proximity to the load.

본 발명은 상기한 문제점을 해결하고자 안출된 것으로, 본 발명의 목적은 분전반에 설치하여 결선변압기가 설정된 일정온도이상 상승 시 회로를 차단하고, 다시 결선 변압기의 온도가 상기 일정온도 미만으로 낮아지면 회로를 자동 복구하는 과부하 보호기능을 구비한 영상고조파 저감장치를 제공하는 것에 있다.The present invention has been made to solve the above problems, an object of the present invention is to install a distribution board to cut off the circuit when the connection transformer rises above a predetermined temperature, and again if the temperature of the connection transformer is lowered below the predetermined temperature circuit It is an object of the present invention to provide an image harmonic reduction device having an overload protection function for automatically recovering a signal.

또한 본 발명의 다른 목적은 철심 및 권선의 온도로 동작하는 차단스위치를 영상고조파저감장치 내부에 장착하여 안정적이고 보다 효율적인 동작이 가능하도록 한 과부하 보호기능을 구비한 영상고조파 저감장치를 제공하는 것에 있다.In addition, another object of the present invention is to provide an image harmonic reduction device having an overload protection function that allows a stable and more efficient operation by mounting a cutoff switch operating at an iron core and winding temperature inside an image harmonic reduction device. .

이와 같은 목적을 달성하기 위한 본 발명은 복수개의 차단기가 분전반으로 결선되고, 전원의 3상(A,B,C) 및 중성선(N)이 분전반 차단기를 거쳐 영상고조파저감장치의 결선변압기의 각 상선(A,B,C)과 중성선(N)에 연결되되, 상기 중성선(N)에는 차단스위치를 개재시켜 구성한 특징을 가진다.In order to achieve the above object, in the present invention, a plurality of circuit breakers are connected to the distribution panel, and three phases (A, B, C) and the neutral wire (N) of the power supply pass through the distribution panel circuit breaker, and each phase line of the connection transformer of the image harmonic reduction device. It is connected to the (A, B, C) and the neutral wire (N), the neutral wire (N) has a feature configured through the interception switch.

또한 본 발명의 상기 차단스위치는 정격 온도 이상이면 단선(Open)되고 정격 온도 미만이면 단락(Short)되는 바이메탈인 것을 특징으로 한다.In addition, the cut-off switch of the present invention is characterized in that the bimetal that is disconnected when the rated temperature or more (Open) and shorter than the rated temperature (Short).

또한, 본 발명의 상기 차단스위치는 상기 결선 변압기의 철심 또는 권선에 선택적으로 설치되되, 이에 접촉 설치한 것을 특징으로 한다.In addition, the cut-off switch of the present invention is selectively installed on the iron core or the winding of the connection transformer, characterized in that the contact is installed.

따라서 본 발명은 철심 및 권선의 온도를 가지고 동작하는 온도 스위치를 내장시켜 권선이 견딜 수 있는 온도 이상인 경우에 회로에서 자동 분리되어, 소손 등의 문제점이 발생하지 않으며, 분전반의 내부온도에 따라 감은 고조파 과전류가 흘러도 동작(회로에서 분리)에 걸리는 시간이 다르게 되어 더 효율적으로 장치를 사용할 수 있는 이점이 있다.Therefore, the present invention has a built-in temperature switch that operates with the temperature of the iron core and the winding is automatically separated from the circuit when the winding is higher than the temperature to withstand, does not cause problems such as burnout, wound harmonics according to the internal temperature of the distribution panel Even if overcurrent flows, the time taken for operation (disconnecting from the circuit) is different, which allows the device to be used more efficiently.

또한 본 발명은 R.S.T 3상 중에서 1상만이 과부하가 되더라도 장치의 전체 권선의 온도는 전체의 상이 과부하인 경우보다 서서히 상승하므로 종래의 방식보다 회로에서 분리되는 시간이 길어지게 된다.In addition, in the present invention, even if only one phase of the R.S.T three phases is overloaded, the temperature of the entire winding of the apparatus rises more slowly than when the entire phase is overloaded, so that the time for separation from the circuit is longer than in the conventional method.

또한 본 발명은 내장된 온도 스위치는 장치가 회로에서 분리되어 고조파 전 류가 흐르지 않게 되어 자연적으로 냉각되면 다시 자동으로 다시 투입(ON)되므로 보수 인원이 없더라도 자동적으로 장치가 회로에 연결되어 고조파를 효율적으로 제거하는 기능을 발휘하게 된다.In addition, in the present invention, the built-in temperature switch is separated from the circuit so that the harmonic current does not flow and automatically turns on again when it is naturally cooled, so even if there is no maintenance personnel, the device is automatically connected to the circuit to effectively harmonics. Will be removed.

또한 본 발명은 특히 고조파의 발생량이 많아 고조파 과전류가 일시적으로 흐르는 경우는 장비의 빈번한 온/오프 및 부하 증가시에 발생하는 현상으로, 일반 과전류와 같이 기기의 내부 고장, 전선의 합선 등과 같이 유지 보수 점검이 필요한 사항이 아니므로 영상고조파 저감기가 견딜 수 없는 온도 근처이하에서 자동으로 회로 분리되고 기기가 냉각되어 식으면 다시 운전 가능 상태로 되어 고조파 제거에 효율적으로 사용하게 된다.In addition, the present invention has a large amount of harmonics, especially when the harmonic overcurrent flows temporarily, which occurs during frequent on / off and load increase of equipment. Since the inspection is not necessary, the image harmonic reducer is automatically disconnected from the circuit near the temperature which cannot be tolerated, and when the device is cooled down and cooled down, it is ready for operation again and is effectively used for removing harmonics.

이하 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예를 보다 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 과부하 보호기능을 구비한 영상고조파 저감장치의 회로 구성도이고, 도 2는 본 발명에 따른 영상고조파 저감장치의 외형 구성도이다.1 is a circuit configuration diagram of an image harmonic reduction apparatus with an overload protection function according to the present invention, Figure 2 is an external configuration diagram of an image harmonic reduction apparatus according to the present invention.

도시된 바와 같이, 본 발명은 복수개의 차단기(FEEDER MCCB)가 분전반(10)으로 결선되고, 전원의 3상(A,B,C) 및 중성선(N)이 분전반 차단기(MCCB1)를 거쳐 영상고조파저감장치(20)의 결선변압기(21)의 각 상선(A,B,C)과 중성선(N)에 연결되되, 상기 중성선(N)에는 차단스위치(TS1)를 개재시켜 구성한 것이다.As shown, in the present invention, a plurality of circuit breakers (FEEDER MCCB) is connected to the distribution panel 10, the three phases (A, B, C) and the neutral line (N) of the power supply through the distribution panel breaker (MCCB1) image harmonics It is connected to each of the phase wires (A, B, C) and the neutral wire (N) of the connection transformer 21 of the abatement device (20), the neutral wire (N) is configured by interposing a switch (TS1).

상기 차단스위치(TS1)는 정격 온도 이상이면 단선(Open)되고 정격 온도 미만 이면 단락(Short)되는 바이메탈이 바람직하다.Preferably, the cutoff switch TS1 is open at a temperature higher than the rated temperature and shorted at a temperature below the rated temperature.

또한 본 발명에 따르자면 상기 차단스위치(TS1)는 도 2에 도시된 바와 같이 결선 변압기(21)의 철심(21a) 또는 권선(21b)에 선택적으로 설치되되, 이에 접촉 설치되어, 상기 결선 변압기(21)의 자체 발열온도에 따라 동작되도록 구성된다.In addition, according to the present invention, the cutoff switch TS1 is selectively installed on the iron core 21a or the winding 21b of the connection transformer 21 as shown in FIG. 2, and is installed in contact with the connection transformer 21. 21) is configured to operate according to the self-heating temperature.

이와 같이 구성되는 본 발명의 동작을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.

먼저, 본 발명에 따른 분전반(10)에 전원(A,B,C)이 투입되면, 부하측에서 발생된 영상분 고조파는 차단기(FEEDER MCCB)를 통하여 분전반(10)의 분전반 차단기(MCCb1)를 거쳐 영상고조파 저감장치(20)의 결선변압기(22)에 흡수되어 진다.First, when power (A, B, C) is supplied to the distribution panel 10 according to the present invention, the image harmonics generated at the load side is passed through the distribution panel breaker (MCCb1) of the distribution panel 10 through the breaker (FEEDER MCCB). It is absorbed by the connection transformer 22 of the image harmonic reduction device 20.

이때 상기 결선변압기(21)에 흐르는 영상고조파전류가 결선 변압기(21)의 정격 용량보다 많아지게 되면 상기 결선변압기(21)의 철심(21a)과 권선(21b)에서 열이 발생하게 된다.At this time, when the image harmonic current flowing in the connection transformer 21 becomes larger than the rated capacity of the connection transformer 21, heat is generated in the iron core 21a and the winding 21b of the connection transformer 21.

상기 결선 변압기(21)에서 발생된 열이 그 철심(21a)에 부착된 차단스위치(TS1)의 정격 온도보다 높게 되면 상기 차단스위치(TS1)는 동작되어 단선(open: OFF)된다. When the heat generated by the connection transformer 21 is higher than the rated temperature of the cutoff switch TS1 attached to the iron core 21a, the cutoff switch TS1 is operated to disconnect (open: OFF).

상기 차단스위치(TS1)가 단선되면 중성선(N)이 차단되어 영상고파전류가 더이상 영상고조파 저감장치(20)의 상선(A,B,C)으로 흐르지 않게 된다. 여기서 상기 중성선(N)이 차단되더라도 나머지 상선(A,B,C)을 통해서는 전류가 흐르게 된다.When the cutoff switch TS1 is disconnected, the neutral line N is cut off so that the image harmonic current no longer flows to the phase lines A, B, and C of the image harmonic reducing device 20. Here, even if the neutral line (N) is blocked, the current flows through the remaining phase lines (A, B, C).

따라서 상기 차단스위치(TS1)가 차단 동작을 수행한 이후에는 영상고조파 저 감장치(20)는 아무리 많은 영상고조파가 부하측에서 발생하도라도 전류가 흐르지 않게 되어 서서히 냉각되게 된다.Therefore, after the cutoff switch TS1 performs the cutoff operation, the image harmonic reducing device 20 is gradually cooled because no current flows even though many image harmonics are generated at the load side.

상기 결선 변압기(21)의 자체 온도가 하강하면 이를 감지하고 있던 차단스위치(TS1)가 다시 복귀(Short:ON)되어 상기 영상고조파 저감장치(20)로 전류가 흐르게 되고, 영상고조파분을 상쇄시키는 작동을 다시 수행하게 되는 것이다.When the temperature of the connection transformer 21 decreases itself, the cutoff switch TS1, which has sensed this, is returned (Short: ON) so that a current flows to the image harmonic reducing device 20, thereby canceling the image harmonic content. You will have to perform the operation again.

도 1은 본 발명에 따른 과부하 보호기능을 구비한 영상고조파 저감장치의 회로 구성도,1 is a circuit diagram of an image harmonic reduction device having an overload protection function according to the present invention;

도 2는 본 발명에 따른 영상고조파 저감장치의 외형구성도이다.2 is an external configuration diagram of an image harmonic reduction device according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10: 분전반 20: 고조파영상저감장치10: distribution panel 20: harmonic image reduction device

21: 결선변압기 TS1: 차단스위치21: connection transformer TS1: disconnect switch

Claims (3)

복수개의 차단기(FEEDER MCCB)가 분전반(10)으로 결선되고, 전원의 3상(A,B,C) 및 중성선(N)이 분전반 차단기(MCCB1)를 거쳐 영상고조파저감장치(20)의 결선변압기(21)의 각 상선(A,B,C)과 중성선(N)에 연결되고, 결선변압기(21)내의 중성선(N)에는 차단스위치(TS1)를 개재시켜 구성한 것을 특징으로 하는 과부하 보호기능을 구비한 영상고조파 저감장치.A plurality of circuit breakers (FEEDER MCCB) is connected to the distribution panel 10, the three-phase (A, B, C) and the neutral wire (N) of the power supply through the distribution panel circuit breaker (MCCB1), the transformer of the image harmonic reduction device 20 An overload protection function is connected to each of the commercial wires (A, B, C) and the neutral wire (N) of (21), and the neutral wire (N) in the connection transformer (21) is formed through a cutoff switch (TS1). Image harmonic reduction device provided. 제 1 항에 있어서, The method of claim 1, 상기 차단스위치(TS1)는 정격 온도 이상이면 단선(Open)되고 정격 온도 미만이면 단락(Short)되는 바이메탈인 것을 특징으로 하는 과부하 보호기능을 구비한 영상고조파 저감장치.The cutoff switch (TS1) is an image harmonic reduction device having an overload protection function, characterized in that the bimetal is open when the temperature is above the rated temperature (short) and short when the temperature is below the rated temperature (Short). 제 1 항에 있어서, The method of claim 1, 상기 차단스위치(TS1)는 상기 결선 변압기(21)의 철심(21a) 또는 권선(21b)에 선택적으로 설치되되, 이에 접촉 설치한 것을 특징으로 하는 과부하 보호기능을 구비한 영상고조파 저감장치.The cutoff switch (TS1) is selectively installed in the iron core (21a) or the winding (21b) of the connection transformer (21), the image harmonic reduction device with an overload protection, characterized in that the contact installation.
KR1020070081539A 2007-08-14 2007-08-14 Zero-pharse harmonic reduction device having protection function of overload KR100795037B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020070081539A KR100795037B1 (en) 2007-08-14 2007-08-14 Zero-pharse harmonic reduction device having protection function of overload
CN2008101345437A CN101369730B (en) 2007-08-14 2008-07-25 Zero-pharse harmonic reduction device having protection function of overload

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070081539A KR100795037B1 (en) 2007-08-14 2007-08-14 Zero-pharse harmonic reduction device having protection function of overload

Publications (1)

Publication Number Publication Date
KR100795037B1 true KR100795037B1 (en) 2008-01-15

Family

ID=39217850

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070081539A KR100795037B1 (en) 2007-08-14 2007-08-14 Zero-pharse harmonic reduction device having protection function of overload

Country Status (2)

Country Link
KR (1) KR100795037B1 (en)
CN (1) CN101369730B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100849463B1 (en) 2008-02-22 2008-07-31 (주) 청송설계이앤씨 A harmonic wave reduction apparatus with an overload protection device
KR100875139B1 (en) 2008-08-28 2008-12-23 한국방재기술 주식회사 Protecting apparatus for eletric surge
KR101045020B1 (en) * 2010-05-10 2011-06-30 (주)엘지산업 Zero-phase harmonic filter with overload protection using non-contact switching device
KR101241859B1 (en) * 2011-06-20 2013-03-11 (주) 디지털파워 Distribution board with zero-phase harmonic active filter
KR101358740B1 (en) 2012-04-02 2014-02-13 (주) 디지털파워 Harmonics Filter Which Detecting The Reverse Phase and The Absent Phase
KR20180028805A (en) * 2016-09-09 2018-03-19 삼성전자주식회사 Cooking device and overheating preventing method thereof
KR20200109997A (en) 2019-03-15 2020-09-23 두경옥 Zero-phase harmonic reduction apparatus having overheat and overload protection function and control process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050974A (en) * 2012-11-23 2013-04-17 安徽省电力公司阜阳供电公司 Low-voltage active harmonic control device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030004428A (en) * 2001-03-28 2003-01-14 동경 엘렉트론 주식회사 Plasma processing device
KR20040008610A (en) * 2002-07-19 2004-01-31 최세완 Active power filter apparatus with reduced VA rating for neutral current suppression
KR20040042607A (en) * 2002-11-15 2004-05-20 휴먼엘텍 주식회사 Device for Detecting Arc Fault

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1057738A (en) * 1991-08-10 1992-01-08 湖北省公安自动控制设备厂 Differential protector for low voltage motor
CN2235167Y (en) * 1995-03-06 1996-09-11 刘德忠 Protector for electric leakage
CN2230060Y (en) * 1995-06-22 1996-06-26 吴震宇 Protective arrangement for neutral wire for disconnection
CN2746625Y (en) * 2004-06-28 2005-12-14 麦德志 Triple harmonic power filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030004428A (en) * 2001-03-28 2003-01-14 동경 엘렉트론 주식회사 Plasma processing device
KR20040008610A (en) * 2002-07-19 2004-01-31 최세완 Active power filter apparatus with reduced VA rating for neutral current suppression
KR20040042607A (en) * 2002-11-15 2004-05-20 휴먼엘텍 주식회사 Device for Detecting Arc Fault

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100849463B1 (en) 2008-02-22 2008-07-31 (주) 청송설계이앤씨 A harmonic wave reduction apparatus with an overload protection device
KR100875139B1 (en) 2008-08-28 2008-12-23 한국방재기술 주식회사 Protecting apparatus for eletric surge
KR101045020B1 (en) * 2010-05-10 2011-06-30 (주)엘지산업 Zero-phase harmonic filter with overload protection using non-contact switching device
KR101241859B1 (en) * 2011-06-20 2013-03-11 (주) 디지털파워 Distribution board with zero-phase harmonic active filter
KR101358740B1 (en) 2012-04-02 2014-02-13 (주) 디지털파워 Harmonics Filter Which Detecting The Reverse Phase and The Absent Phase
KR20180028805A (en) * 2016-09-09 2018-03-19 삼성전자주식회사 Cooking device and overheating preventing method thereof
KR102490921B1 (en) * 2016-09-09 2023-01-20 삼성전자주식회사 Cooking device and overheating preventing method thereof
KR20200109997A (en) 2019-03-15 2020-09-23 두경옥 Zero-phase harmonic reduction apparatus having overheat and overload protection function and control process

Also Published As

Publication number Publication date
CN101369730B (en) 2012-05-30
CN101369730A (en) 2009-02-18

Similar Documents

Publication Publication Date Title
KR100795037B1 (en) Zero-pharse harmonic reduction device having protection function of overload
RU2481666C2 (en) Automatic fault current shutdown device
US5790356A (en) Transformer protection system for protecting source transformers from ill effects of zero-sequence currents
KR200444316Y1 (en) Apparatus improvement automatic sequence unbalance current end harmonics
KR101080298B1 (en) Panelboard having zero harmonics filtering function
KR20090086141A (en) The zero-phase harmonic filter which has a protctive function of current limiting, it used the element of ptc
KR100849463B1 (en) A harmonic wave reduction apparatus with an overload protection device
US20190341769A1 (en) Low-voltage protection switch unit
EP3084800B1 (en) Electrical switching apparatus including alternating current electronic trip circuit with arc fault detection circuit and power supply
US6710988B1 (en) Small-sized industrial rated electric motor starter switch unit
KR101245748B1 (en) Hybrid harmonic reduction device equipped with over-current, over-heat and surge protection functions
KR100883502B1 (en) Apparatus for controlling harmonic wave automatically
KR20130047703A (en) Recovery device and method off recovery for open-phase in the power transmission line
JP6069073B2 (en) Current limiting device
KR101080294B1 (en) Zero harmonics filtering apparatus having multiple safety ability
KR100973326B1 (en) Harmonics absorptive power-factor improvement apparatus
KR100987156B1 (en) A distribution panel with harmonic wave resistance
CN101499653A (en) Method for protecting electrical appliance by over-current side path
US1774417A (en) Distribution and overload protective system
KR20080093400A (en) Multi function relay for the protection of motor
KR102237081B1 (en) Zero-phase harmonic reduction apparatus having overheat and overload protection function and control process
US9025298B2 (en) Electrical switching apparatus including transductor circuit and alternating current electronic trip circuit
KR200241287Y1 (en) Wiring breakers with built-in phase protection circuit
KR101053664B1 (en) Transformer protection device
Durocher Unit substation design

Legal Events

Date Code Title Description
A201 Request for examination
A302 Request for accelerated examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20101210

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20131209

Year of fee payment: 7

LAPS Lapse due to unpaid annual fee