KR20140000464U - Track circuit insulation tester - Google Patents

Track circuit insulation tester Download PDF

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KR20140000464U
KR20140000464U KR2020120006153U KR20120006153U KR20140000464U KR 20140000464 U KR20140000464 U KR 20140000464U KR 2020120006153 U KR2020120006153 U KR 2020120006153U KR 20120006153 U KR20120006153 U KR 20120006153U KR 20140000464 U KR20140000464 U KR 20140000464U
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insulation
track circuit
track
state
signal
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KR2020120006153U
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KR200471554Y1 (en
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이충효
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대구도시철도공사
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/60Testing or simulation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
    • B61L1/18Railway track circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L1/00Devices along the route controlled by interaction with the vehicle or vehicle train, e.g. pedals
    • B61L1/18Railway track circuits
    • B61L1/181Details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L27/00Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
    • B61L27/50Trackside diagnosis or maintenance, e.g. software upgrades
    • B61L27/53Trackside diagnosis or maintenance, e.g. software upgrades for trackside elements or systems, e.g. trackside supervision of trackside control system conditions
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing

Abstract

본 고안은 궤도회로 절연 상태를 용이하게 파악할 수 있으면서 장애가 발생하기 전에 적극 대응 가능하도록 하는 것은 물론, 장애가 발생한 상태에서도 신속한 대응할 수 있도록 한 도시철도용 궤도회로 절연 판정기에 관한 것으로서;
박스형상으로 구비되는 판정기바디와, 상기 판정기바디의 상부에 개폐 가능하게 결합 되는 커버와, 상기 커버에는 작동 선택을 위한 스위치와, 작동상태를 시각적으로 확인시켜주기 위한 작동램프와, 궤도회로의 절연상태의 양,불을 시각적으로 확인할 수 있도록 하기 위한 판정램프와, 절연파괴시 흐르는 전류 값을 숫자로 표시하기 위한 표시창을 설치하고, 상기 판정기바디 내부에는 궤도회로의 절연상태를 측정하여 양불 판정을 수행하기 위한 측정수단을 설치하여 구성하는 것이 특징이다.
The present invention relates to an urban railway track circuit insulation determiner capable of easily grasping the track circuit insulation state and actively responding before a fault occurs, as well as a quick response even in a faulty state;
A judging body provided in a box shape, a cover coupled to the top of the judging body so as to be openable and closed, the cover includes a switch for selecting an operation, an operation lamp for visually confirming an operation state, and a raceway circuit. Determination lamp for visually confirming the quantity and fire of insulation state and display window for displaying the current value flowing in case of insulation breakdown, and measuring insulation state of track circuit inside It is characterized by providing and configuring measuring means for performing a good judgment.

Figure P2020120006153
Figure P2020120006153

Description

도시철도용 궤도회로 절연 판정기{TRACK CIRCUIT INSULATION TESTER}Track rail insulation tester for urban railways {TRACK CIRCUIT INSULATION TESTER}

본 고안은 도시철도용 궤도회로 절연 판정기에 관한 것으로서 더욱 상세하게는 도시철도를 구성하는 궤도회로의 궤조절연 상태를 파악하고 절연파괴 여부에 관한 시험을 현장에서 신속하게 수행하여 후속조처를 취할 수 있도록 한 절연 판정기의 제공에 관한 것이다.The present invention relates to a track circuit insulation determiner for urban railways, and more particularly, to grasp the track insulation state of track circuits constituting the urban railway, and to perform follow-up measures by promptly conducting tests on insulation breakdown in the field. It relates to the provision of an insulation determiner.

도시철도의 궤도회로는 궤조절연을 이용하여 궤도회로를 구분하고 있으며, 궤조절연은 쇳가루나 이물질 또는 열차의 운행에 따라 절연상태가 나빠지게 되고, 이와 같이 궤조절연 상태가 나빠질 경우에는 궤도의 구분이 불가능하게 되므로 정상적인 기능을 수행하지 못하고 결국에는 열차의 운행이 중단되는 사태가 발생하게 된다.Track circuits of urban railways use track insulation to classify track circuits, and track insulation deteriorates due to dust, foreign matter, or train operation. Since it is impossible to perform a normal function and eventually the operation of the train will be interrupted.

상기와 같은 궤도회로는, 레일을 전기회로의 일부로 이용하여 회로를 구성하고 그 회로에 열차가 진입하면 차축에 의하여 양쪽 레일의 전기적인 회로를 단락함에 따라 열차의 유무를 검지하기 위한 목적으로 만들어진 전기회로를 의미한다.The above-described track circuit constitutes a circuit using a rail as a part of an electric circuit, and when the train enters the circuit, the electric circuit made for the purpose of detecting the presence or absence of the train by shorting the electric circuit of both rails by the axle. Means circuit.

이러한 궤도회로는 AF 궤도회로, PF 궤도회로, 임펄스 궤도회로, 정류 궤도회로, 분주 궤도회로로 구분되고, 이러한 각각의 궤도회로마다 별도의 검지방법을 구현하거나 각 궤조절연을 개별적으로 해체하여 궤조절연의 기능을 정상적으로 회복하도록 하고 있다.These track circuits are divided into AF track circuits, PF track circuits, impulse track circuits, rectified track circuits, and divided track circuits, and each track circuit implements a separate detection method or separates each track insulation separately. To restore normal function.

종래에는 궤조절연의 상태를 작업자가 시각적인 확인을 통하여 이상 여부를 판단하게 되고, 이상이 있는 것으로 판단될 경우에는 작업자가 직접 쇳가루와 같은 이물질을 제거하거나, 절연상태를 해체한 후 문제를 해소시킨 다음 다시 조립하는 과정을 거치게 된다.In the related art, the operator determines whether or not the abnormality of the rail insulation is visually confirmed, and when it is determined that the abnormality is found, the worker directly removes foreign substances such as ear powder or dismantles the insulation state to solve the problem. Then reassembling will take place.

복잡한 분기부의 궤도회로에서는 특별한 검지방법이 존재하지 않고 있는 실정이며, 특히 본선 분기부 PF 궤도회로의 12개 궤조절연에 열차운행시 차륜과 선로의 마찰로 발생하는 쇳가루 등 기타 이물질에 의하여 절연불량 현상이 지속적으로 발생하고 있는 실정이다.There is no special detection method in the track circuit of the complicated branch. Especially, the 12 track insulation of the main branch PF track circuit is insulated due to the friction of wheels and tracks caused by friction of wheels and tracks. This situation is constantly occurring.

이와 같이 PF 궤도회로의 궤조절연 중 1개소라도 절연 불량이 발생 되면 PF궤도회로 장애로 열차 자동운전 불능(FMC 운행)으로 열차지연운행을 초래하게 되므로 안전사고의 우려와 더불어 이용자들에게 많은 불편을 초래하게 되는 원인이 된다.In this way, if one of the fault insulation of the PF track circuit insulation occurs, the PF track circuit failure causes train delays due to the automatic operation of the train (FMC operation). It is a cause to be caused.

PF 궤도회로의 궤조절연 관리와 장애조치시 작업자가 수작업으로 절연해체 점검을 수행하기 때문에 점검과 유지보수에 많은 시간이 소요되므로 신속한 작업을 수행하는 것이 현실적으로 불가능하게 된다.Since the operator performs manual insulation disassembly check during the track insulation management and failure of the PF track circuit, it is practically impossible to carry out prompt work because it takes much time for inspection and maintenance.

또한, 작업시간이 과다하게 소요되므로 인하여 시설물관리가 비효율적인 것은 물론, 현장에서 궤조절연과 관련한 작업을 수행하는 과정에서 작업자가 항상 안전사고의 위험에 노출되어 있는 등 많은 문제점이 발생하고 있는 실정이다.In addition, due to excessive working time, not only is facility management inefficient, but there are also many problems such as the worker is always exposed to the risk of safety accidents in the course of performing work related to rail insulation in the field. .

이에 본 고안에서는 상기와 같은 문제점들을 해결하기 위하여 고안한 것으로서, 박스형상으로 구비되는 판정기바디와, 상기 판정기바디의 상부에 개폐 가능하게 결합 되는 커버와, 상기 커버에는 작동 선택을 위한 스위치와, 작동상태를 시각적으로 확인시켜주기 위한 작동램프와, 궤도회로의 절연상태의 양,불을 시각적으로 확인할 수 있도록 하기 위한 판정램프와, 절연파괴시 흐르는 전류 값을 숫자로 표시하기 위한 표시창을 설치하고, 상기 판정기바디 내부에는 궤도회로의 절연상태를 측정하여 양불 판정을 수행하기 위한 측정수단을 설치하여 구성하며;Therefore, the present invention has been devised to solve the above problems, a determiner body provided in a box shape, a cover coupled to open and close on the top of the determiner body, the cover has a switch for operation selection and It is equipped with an operation lamp for visually confirming the operation state, a judgment lamp for visually confirming the amount and fire of the insulation state of the track circuit, and a display window for displaying the current value flowing in the event of insulation breakdown. And, inside the judging body, measuring means for measuring the insulation state of the track circuit to perform a good judgment;

궤도회로 절연 상태를 용이하게 파악할 수 있으면서 장애가 발생하기 전에 적극 대응 가능하도록 하는 것은 물론, 장애가 발생한 상태에서도 신속한 대응할 수 있는 목적 달성이 가능하다.While it is possible to easily grasp the track circuit insulation state, it is possible not only to actively respond before a failure occurs, but also to achieve the purpose of quickly responding even in a failure state.

본 고안은 복잡한 분기부나 궤조절연이 포함된 모든 궤도회로에 적용하여 궤조절연상태를 작업자가 시각적으로 확인할 수 있는 판정기를 제공하여 용이하게 파악할 수 있으면서 장애가 발생하기 전에 적극 대응 가능하도록 하는 것은 물론, 장애가 발생한 상태에서도 신속한 대응을 통하여 도시철도의 안전운행을 도우면서 작업의 효율성을 높이고 작업과정에서 안전사고 우려를 배제하면서 시설물 관리를 효율적으로 수행할 수 있는 등 다양한 효과를 가지는 고안이다.The present invention is applied to all track circuits with complicated branching or track insulation to provide a checker that enables the operator to visually check the track insulation status so that the user can easily grasp and actively respond before a failure occurs. It is designed to have various effects such as improving the efficiency of the work while improving the efficiency of the work by quickly responding to the situation, and effectively managing the facilities while eliminating the concern of safety accidents in the work process.

도 1은 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기를 도시한 사시도.
도 2는 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기를 도시한 구성 블록도.
도 3은 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기의 사용 상태도.
1 is a perspective view showing a railroad circuit insulation determination system for the technique of the present invention is applied.
Figure 2 is a block diagram showing the construction of a railroad circuit insulation determination system for the technique of the present invention is applied.
Figure 3 is a state diagram of the railroad circuit insulation determination system applied to the technology of the present invention.

이하 첨부되는 도면과 관련하여 상기 목적을 달성하기 위한 본 고안의 구성과 작용에 대하여 설명하면 다음과 같다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

도 1은 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기를 도시한 사시도, 도 2는 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기를 도시한 구성 블록도, 도 3은 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기의 사용 상태도로서 함께 설명한다.1 is a perspective view showing a railroad circuit insulation determination system for a metropolitan railway to which the technology of the present invention is applied, FIG. 2 is a block diagram showing a railroad circuit insulation determination system for the urban railway to which the technology of the present invention is applied, and FIG. It demonstrates together as a use state diagram of the track | orbital circuit insulation determiner for urban railway to which the technique was applied.

본 고안의 기술이 적용되는 도시철도용 궤도회로 절연 판정기(100)는, 개략 직육면체의 박스형상으로 구비되는 판정기바디(101)를 구비하고, 상기 판정기바디(101)의 상부에는 힌지와 단속수단에 의하여 판정기바디(101)에 대하여 개폐 가능한 커버(102)를 결합한다.An urban railroad track insulation tester 100 to which the technique of the present invention is applied includes a tester body 101 that is provided in a box shape of a schematic rectangular parallelepiped, and a hinge and an upper portion of the tester body 101. The cover 102 that can be opened and closed with respect to the determiner body 101 is coupled by an intermittent means.

상기 커버(102)에는 작동을 위한 스위치(103)와 작동상태를 시각적으로 확인시켜주기 위한 작동램프(104)와 궤도회로의 절연상태의 양,불을 시각적으로 확인할 수 있도록 하기 위한 판정램프(105)와 더불어 절연파괴시 흐르는 전류 값을 숫자로 표시하기 위한 표시창(106)을 가지도록 한다.The cover 102 has an operating lamp 104 for visually confirming the operation state and the switch 103 for operation and a determination lamp 105 for visually confirming the amount and fire of the insulation state of the track circuit. In addition, to have a display window 106 for displaying the current value at the time of insulation breakdown numerically.

상기 판정기바디(101)의 내부에는 궤도훼로의 절연상태를 측정하여 양불 판정을 수행하기 위한 측정수단(110)을 설치하여 구성한다.In the inside of the determiner body 101, a measuring means 110 is installed to measure the insulation state of the track defect and perform a good judgment.

상기 측정수단(110)은, 궤도회로 궤조절연의 교류주파수의 세기를 측정하는 픽업코일(Pickup Coil, 111)과, 픽업코일(111)에 의하여 감지된 신호를 증폭시키기 위한 1증폭기(112)와, 상기 1증폭기(112)를 통하여 증폭된 신호에서 원하는 특정주파수만을 분리하는 밴드패스필터(Band Pass Filter, 113)를 구비한다.The measuring means 110 includes a pick-up coil 111 for measuring the strength of the AC frequency of the track circuit track insulation, and an amplifier 112 for amplifying a signal sensed by the pick-up coil 111. And a band pass filter 113 for separating only a specific frequency desired from the signal amplified by the first amplifier 112.

상기 픽업코일(111)과 밴드패스필터(113)의 경우에는 궤조절연의 주파수에 동조될 수 있도록 하는 것은 당연할 것이며, 본 고안의 경우에는 20㎑의 교류주파수에 동조 될 수 있도록 설정되어 있다.In the case of the pick-up coil 111 and the band pass filter 113, it is natural to be able to tune to the frequency of the rail insulation, and in the present invention, it is set to be tuned to an AC frequency of 20 kHz.

상기 밴드패스필터(113)를 통과한 신호를 한번 더 증폭시키는 2증폭기(114)와, 증폭된 교류주파수 신호를 처리할 수 있도록 직류로 변환하는 AC/DC컨버터(115)와, 직류로 변환된 신호를 보정하고 사용자가 확인할 수 있는 숫자로 바꾸어 작동 및 판정램프(104, 105)와 표시창(106)을 통하여 표시하도록 제어하는 CPU(116)로 구성한다.A second amplifier 114 for amplifying the signal passing through the band pass filter 113 once more, an AC / DC converter 115 for converting the amplified AC frequency signal into a direct current so as to be processed, and The CPU 116 is configured to control the signal to be corrected and changed to a number that can be checked by the user, and displayed through the operation and judgment lamps 104 and 105 and the display window 106.

상기와 같은 본 고안의 기술이 적용된 도시철도용 궤도회로 절연 판정기(100)를 이용하여 궤조절연 상태를 파악하는 과정을 살펴보면 다음과 같다.Looking at the process of grasping the track insulation state by using the railroad circuit insulation determiner 100 for the urban railway technology applied as described above are as follows.

AF 궤도회로, PF 궤도회로, 임펄스 궤도회로, 정류 궤도회로, 분주 궤도회로로 구성되는 궤도회로의 궤조절연 상태를 파악하기 위하여 궤조절연 위치의 궤도회로에 절연 판정기(100)를 올려놓는다.The insulation determiner 100 is placed on the track circuit at the track insulation position in order to determine the track insulation state of the track circuit including the AF track circuit, the PF track circuit, the impulse track circuit, the rectified track circuit, and the divided track circuit.

이러한 상태에서 스위치(103)를 작동시키면 전원이 인가되면서 작동램프(104)가 점등되고, 동시에 판정기바디(101) 내부에 설치되는 측정수단(110)이 작동하여 궤조절연의 절연상태를 파악하여 판정램프(105)와 표시창(106)을 통하여 표시하여 주게 되므로 작업자는 쉽게 시각적으로 확인하여 판정하고 후속조처를 취할 수 있게 된다.In this state, when the switch 103 is operated, the operation lamp 104 is turned on while power is applied, and at the same time, the measuring means 110 installed inside the determiner body 101 operates to determine the insulation state of the track insulation. Since it is displayed through the determination lamp 105 and the display window 106, the operator can easily visually check and determine and follow up.

즉, 전원이 인가되면 측정수단(110)을 구성하는 픽업코일(111)이 궤조절연 주변의 동조주파수를 감지(측정기 자체에서 주파수를 공급하는 것이 아니라, 측정기 자체에서 20KHz 주파수를 송신할 경우, 궤도회로에 저주파 잡음과 다른 궤도로 측정주파수가 유도되어 궤조절연의 절연상태 측정이 불가능하게 된다.That is, when the power is applied, the pickup coil 111 constituting the measuring means 110 detects the tuning frequency around the rail insulation (when the transmitter itself transmits a 20KHz frequency, instead of supplying a frequency from the measuring instrument itself, The measurement frequency is induced in the circuit with low frequency noise and other trajectories, making it impossible to measure the insulation of the oscillator insulation.

따라서, 20KHz의 “궤도회로 절연확인용 주파수”는 궤도회로에 별도로 공급하고 측정기는 궤조절연 주변의 “궤도회로 절연 확인용 주파수”를 감지하고 그 세기를 측정하여 궤조절연의 상태를 판단하게 된다.)하여 측정하게 된다.Therefore, the "orbital circuit insulation confirmation frequency" of 20KHz is separately supplied to the track circuit, and the measuring device detects the "orbital circuit insulation confirmation frequency" around the rail insulation and measures the strength to determine the state of the rail insulation. Will be measured.

이와 같이 측정된 주파수는 1증폭기(112)를 통하여 증폭시킨 후 밴드패스필터(113)를 통하여 불필요한 주파수를 제외한 특정주파수만을 분리하는 작업을 수행하게 된다.The frequency measured in this way is amplified by one amplifier 112, and the bandpass filter 113 performs a task of separating only a specific frequency except the unnecessary frequency.

특정주파수의 분리가 완료되면 2증폭기(114)를 통하여 다시 증폭시킨 후 AC/DC컨버터(115)를 경유하여 교류를 직류로 변환시키고, 직류로 변환된 신호는 CPU(116)를 통하여 신호의 보정과 더불어 이용자가 식별할 수 있는 숫자로 바꾸어 판정램프(105)를 점,소등시키는 것은 물론 표시창(106)을 통하여 시각적으로 확인할 수 있게 해준다.After the separation of the specific frequency is amplified again through the two amplifier 114, and converts the alternating current to DC via the AC / DC converter 115, the signal converted to direct current through the CPU 116 correction of the signal In addition, by changing to a number that can be identified by the user, the judgment lamp 105 can be turned on and off as well as visually confirmed through the display window 106.

그러면 작업자는 판정램프(105)의 점,소등정보와 더불어 표시창(106)에 표시되는 정보를 토대로 절연상태를 확인하여 후속조처를 취할 수 있게 되므로 신속한 점검과 대처를 가능하게 하는 장점을 가진다.Then, the operator can check the insulation state based on the information displayed on the display window 106 in addition to the dot and off information of the determination lamp 105 to take subsequent steps, which has the advantage of enabling rapid inspection and countermeasure.

100; 절연 판정기
103; 스위치
104; 작동램프
105; 판정램프
106; 표시창
110; 측정수단
111; 픽업코일
112; 1증폭기
113; 밴드패스필터
114; 2증폭기
115; AC/DC컨버터
116; CPU
100; Insulation judge
103; switch
104; Operating lamp
105; Judgment lamp
106; Display window
110; Measuring means
111; Pickup coil
112; 1 amplifier
113; Band Pass Filter
114; 2 amplifiers
115; AC / DC Converter
116; CPU

Claims (2)

박스형상으로 구비되는 판정기바디와;
상기 판정기바디에 개폐 가능하게 결합 되는 커버와;
상기 커버에는 작동 선택을 위한 스위치와;
작동상태를 시각적으로 확인시켜주기 위한 작동램프와;
궤도회로의 절연상태의 양,불을 시각적으로 확인할 수 있도록 하기 위한 판정램프와;
절연파괴시 흐르는 전류 값을 숫자로 표시하기 위한 표시창을 설치하고;
상기 판정기바디 내부에는 궤도회로의 절연상태를 측정하여 양불 판정을 수행하기 위한 측정수단을 설치하여 구성하는 것을 특징으로 하는 도시철도용 궤도회로 절연 판정기.
A determiner body provided in a box shape;
A cover coupled to the determiner body so as to be opened and closed;
The cover includes a switch for selecting an operation;
An operation lamp for visually confirming an operation state;
A determination lamp for visually confirming the quantity and the fire of the insulation state of the track circuit;
A display window for numerically displaying the current value flowing at the time of insulation breakdown;
And the measuring means for measuring the insulation state of the track circuit and performing the determination of the failure of the track circuit.
제 1 항에 있어서;
상기 측정수단은, 궤도회로 궤조절연의 교류주파수의 세기를 측정하는 픽업코일과;
상기 픽업코일에 의하여 감지된 신호를 증폭시키는 1증폭기와;
상기 1증폭기를 통하여 증폭된 신호에서 원하는 특정주파수만을 분리하는 밴드패스필터와;
상기 밴드패스필터를 통과한 신호를 한번 더 증폭시키는 2증폭기와;
증폭된 교류주파수 신호를 처리할 수 있도록 직류로 변환하는 AC/DC컨버터와;
직류로 변환된 신호를 보정하고 사용자가 확인할 수 있는 숫자로 바꾸어 작동 및 판정램프와 표시창을 통하여 표시하도록 제어하는 CPU를 포함하는 것을 특징으로 하는 도시철도용 궤도회로 절연 판정기.
The method of claim 1, further comprising:
The measuring means includes a pick-up coil for measuring the strength of the AC frequency of the track circuit track insulation;
An amplifier for amplifying a signal sensed by the pickup coil;
A band pass filter for separating only a specific specific frequency from the signal amplified by the one amplifier;
A second amplifier for once again amplifying the signal passing through the band pass filter;
An AC / DC converter for converting the amplified AC frequency signal into direct current so as to be processed;
And a CPU for correcting the signal converted into direct current and converting the signal into a number that can be checked by the user and displaying the same through an operation and judgment lamp and a display window.
KR2020120006153U 2012-07-12 2012-07-12 Track circuit insulation tester KR200471554Y1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102044545B1 (en) 2019-07-11 2019-11-14 (주)금호전력 Inspection system for insulation of track circuits for railways and inspection method using them
KR102044544B1 (en) 2019-07-11 2019-11-14 (주)금호전력 Railway rail insulation inspection system
KR20210008236A (en) 2019-07-11 2021-01-21 (주)금호전력 Track circuit insulation checker for railway

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200458238Y1 (en) * 2010-10-19 2012-01-31 서울메트로 A Sensing Apparatus of Leakage Current on Track Circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102044545B1 (en) 2019-07-11 2019-11-14 (주)금호전력 Inspection system for insulation of track circuits for railways and inspection method using them
KR102044544B1 (en) 2019-07-11 2019-11-14 (주)금호전력 Railway rail insulation inspection system
KR20210008236A (en) 2019-07-11 2021-01-21 (주)금호전력 Track circuit insulation checker for railway

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