KR940022101A - Leakage current prevention circuit - Google Patents

Leakage current prevention circuit Download PDF

Info

Publication number
KR940022101A
KR940022101A KR1019940003325A KR19940003325A KR940022101A KR 940022101 A KR940022101 A KR 940022101A KR 1019940003325 A KR1019940003325 A KR 1019940003325A KR 19940003325 A KR19940003325 A KR 19940003325A KR 940022101 A KR940022101 A KR 940022101A
Authority
KR
South Korea
Prior art keywords
phase
terminal
ground
wiring
leakage current
Prior art date
Application number
KR1019940003325A
Other languages
Korean (ko)
Inventor
토시하사 시미즈
쥰 히로세
마사노부 후지쿠라
노보루 타카하시
유타카 나카마
슌이찌 야마모토
Original Assignee
나까사또 요시히꼬
후지 덴끼 가부시끼가이샤
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 나까사또 요시히꼬, 후지 덴끼 가부시끼가이샤 filed Critical 나까사또 요시히꼬
Publication of KR940022101A publication Critical patent/KR940022101A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/347—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system using summation current transformers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection

Abstract

[목적]누설전류검출기를 오동작시키는 일없이, 고주파잡음을 충분히 줄일수 있도록 한다.[Purpose] It is possible to sufficiently reduce high frequency noise without malfunctioning the leakage current detector.

[구성]예로서, S상이 접지된 삼상교류전원(100)의 전원배선(101)~(103)에, 누설전류검출기(4)를 통해 접속된 전기기기(20)의 교류입력단자 R',S',T'와 그 접지단자 E 사이에, 합성누설전류 IR-IT와 역위상으로 동일진폭의 보상전류 IX가 흐르도록 하기위한 누설전류보상회로(400)를 설치함으로써, 전원접지선(5) 및 기기접지선(19)에 흐르는 전류를 거의 0으로 하고, 누설전류검출기(4)에 접지콘덴서(10)~(12)를 설치함으로써, 오동작을 방지하도록 한다.[Configuration] As an example, the AC input terminal R 'of the electric device 20 connected through the leakage current detector 4 to the power supply wirings 101 to 103 of the three-phase AC power supply 100 with the S-phase grounded. A power supply grounding line is provided between S ', T' and its ground terminal E by providing a leakage current compensating circuit 400 for allowing the compensating current I X of the same amplitude to flow out of phase with the synthetic leakage current I R -I T. (5) and the current flowing through the device ground line 19 are set to almost zero, and the ground capacitors 10 to 12 are provided in the leakage current detector 4 to prevent malfunction.

Description

누설전류 방지회로Leakage current prevention circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 1 도는 제 1 실시예를 나타내는 회로도,1 is a circuit diagram showing a first embodiment,

제 2 도는 제 2 실시예를 나타내는 회로도,2 is a circuit diagram showing a second embodiment,

제 3 도는 제 1 도, 제 2 도의 동작을 설명하기 위한 벡터도,3 is a vector diagram for explaining the operation of FIG. 1, FIG.

제 4 도는 제 3 실시예를 나타낸 회로도,4 is a circuit diagram showing a third embodiment,

제22도는 종래예를 나타내는 회로도,22 is a circuit diagram showing a conventional example;

제23도는 동작을 설명하기 위한 벡터도.23 is a vector diagram for explaining the operation.

Claims (18)

어느 하나의 상배선이 전원접지선에 의해 접지된 삼상교류전원과, 삼상교류입력단자가 각각 접지콘덴서를 통해 기기접지선에 의해 접지된 전기기기를 삼상3선전원배선에 의해 접속하고, 또, 상기삼상교류전원과 전기기기를 접속하는 전원배선의 경로의 누설전류검출기를 접속함과 동시에, 상기 삼상교류전원이 접지되지 않은 2개의 전원단자로 부터, 상기누설전류검출기와 전원배선과 여기에 접속된 상기 전기기내의 상기 접지콘덴서를 경유하여 흐르는 누설전류에 대해, 이와는 역위상으로 동일진폭의 흐르도록 누설전류보상회로를 설치함으로써, 상기 전원접지선과 상기 기기접지선에 흐르는 전류를 거의 0으로 하여, 상기 누설전류검출기의 상기 접지콘덴서에 의한 오동작을 방지하는 것을 특징으로 하는 누설전류 방지회로.The three-phase AC power supply in which any one phase wiring is grounded by the power grounding wire, and the three-phase AC power supply terminal are connected to each other by a three-phase three-wire power wiring, respectively. The leakage current detector and the power supply wiring connected to the power supply wiring are connected to the leakage current detector connected to the AC power supply and the electrical equipment, and from the two power supply terminals to which the three-phase AC power supply is not grounded. The leakage current compensating circuit is provided so that the leakage current flowing through the ground capacitor in the electric machine flows in the same phase in the opposite phase, so that the current flowing through the power supply ground line and the device ground line is almost 0, and the leakage A leakage current preventing circuit, wherein the malfunction of the current detector by the ground capacitor is prevented. 제 1 항에 있어서, 상기 누설전류 보상회로를, 상기 삼상교류전원중 전원접지선에 접속된 접지상배선과 이 접지상배선에 대하여 전압위상이 120도만큼 앞선 상배선과의 사이에, 제 1 단상절연변압기의 부극입력 단자의 정극입력단자를 각각 접속하고, 상기 접지상배선과 이 접지상배선에 대해 전압위상이 120도만큼 늦은 상배선과의 사이에, 제 2 단상절연변압기의 정극입력단자와 부극입력단자를 각각 접속하고, 상기 제1, 제2단상절연변압기의 정극출력단자끼리 접속하고, 상기 제 2 단상절연변압기의 부극출력단자를 상기 전기기기의 접시상배선이 접속되는 교류입력단자에 접속하고, 상기 제 1 단상절연변압기의 부극출력단자를 콘덴서의 한쪽 단자에 접속하고, 이 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.2. The first single phase insulation circuit according to claim 1, wherein the leakage current compensating circuit is formed between a ground phase wiring connected to a power supply ground line of the three-phase AC power supply and a phase wiring whose voltage phase is 120 degrees with respect to the ground phase wiring. The positive input terminal of the negative input terminal of the transformer is connected to each other, and the positive input terminal and the negative input of the second single phase insulated transformer are connected between the ground phase wiring and the phase wiring whose voltage phase is delayed by 120 degrees with respect to the ground phase wiring. The terminals are connected to each other, and the positive output terminals of the first and second single phase insulated transformers are connected to each other, and the negative output terminal of the second single phase insulated transformer is connected to an AC input terminal to which a dish-phase wiring of the electric device is connected. The negative output terminal of the first single phase insulated transformer is connected to one terminal of the capacitor, and the other terminal of the capacitor is connected to the ground terminal or the ground line of the electrical apparatus. Leakage current protection circuit characterized in that. 제 1 항에 있어서, 상기 누설전류 보상회로를, 입력전선과 출력전선에 성형 결선된 삼상절연변압기의 3개의 입력단자를 상기 삼상교류전원의 3개의 상배선에 각각 접속하고, 상기 삼상절연변압기의 3개의 출력단자중에서, 입력단자가 접지상배선에 접속된 상의 출력단자를 콘덴서의 한쪽 단자에 접속하고, 이 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하고, 상기 삼상절연변압기의 3개의 출력전선을 공통으로 접속하며, 이 공통접속점을 상기 전기기기의 접지상배선이 접속되는 교류 입력단자에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.The three-phase insulated transformer according to claim 1, wherein the leakage current compensation circuit is connected to three input terminals of the three-phase insulated transformer molded into the input wire and the output wire, respectively, to three phase wires of the three-phase AC power supply. Of the three output terminals, the output terminal of the phase in which the input terminal is connected to the ground phase wiring is connected to one terminal of the capacitor, and the other terminal of the capacitor is connected to the ground terminal or the equipment ground line of the electric equipment, and the three phase And three output wires of the insulated transformer are connected in common, and the common connection point is connected to an AC input terminal to which the ground phase wiring of the electric equipment is connected. 제 1 항에 있어서, 상기 누설전류 보상회로를, 상기 삼상교류전원의 전원접지선에 접속된 접지상배선과 이 접지상배선에 대하여 전압위상이 120만큼 늦은 상배선 사이에, 단상절연변압기의 정극입력단자와 부극입력단자를 각각 접속하며, 이 단상절연변압기의 정극 출력단자를 저항의 한쪽 단자를 접속하고, 이 콘덴서의 다른쪽 단자를 상기 전기 기기의 접지단자 또는 상기 기기접지선에 접속하며, 동시에 상기 단상절연변압기의 부극출력단자를 상기 전기기기의 접지상배선이 접속되는 교류 입력단자에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.2. The positive electrode input of the single-phase insulated transformer according to claim 1, wherein the leakage current compensation circuit is connected between a ground phase wiring connected to the power supply grounding line of the three-phase AC power supply and a phase wiring whose voltage phase is delayed by 120 with respect to the grounding phase wiring. A terminal and a negative electrode input terminal are respectively connected, and the positive output terminal of the single-phase insulated transformer is connected to one terminal of the resistor, and the other terminal of the capacitor is connected to the ground terminal of the electric device or the device ground line. And a negative current output terminal of the single-phase insulated transformer is connected to an AC input terminal to which the ground phase wiring of the electric equipment is connected. 제 1 항에 있어서, 상기 누설전류 보상회로를, 상기 삼상교류전원중 어느 두개의 전원배선에 절연변환기의 입력단자를 각각 접속하고, 그 절연변환기의 출력단자를 위상변화기의 입력 단자에 각각 접속하고, 이 위상변환기의 한쪽의 출력단자를 콘덴서의 한쪽 단자에 접속하고, 그 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기 접지선에 접속하고, 상기 위상변환기의 다른쪽 출력단자를 상기 전기기기의 접지상배선이 접속되는 교류 입력단자에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.2. The circuit according to claim 1, wherein the leakage current compensating circuit is connected to any two power supply wirings of the three-phase AC power supply, respectively, and the output terminal of the insulation converter is connected to the input terminal of the phase changer, respectively. One output terminal of the phase converter is connected to one terminal of the capacitor, the other terminal of the capacitor is connected to the ground terminal of the electrical equipment or the device ground line, and the other output terminal of the phase converter is A circuit for preventing leakage current, characterized in that it is connected to an AC input terminal to which the earth phase wiring of the equipment is connected. 제2 내지 5항중 어느 한 항에 있어서, 상기 제1, 제 2 단상절연변압기, 상기 삼상절연변압기 또는 상기 단상절연변압기 또는 상기 절연변압기의 각 입력측 또는 출력측에, 보상전류를 발생시키는 기전압을 조정하기 위한 전압조정기를 설치한 것을 특징으로 하는 누설전류 방지회로.6. The method according to any one of claims 2 to 5, wherein an electromotive voltage for generating a compensation current is adjusted at each input side or output side of the first, second single-phase insulated transformer, the three-phase insulated transformer, the single-phase insulated transformer, or the insulated transformer. Leakage current prevention circuit, characterized in that a voltage regulator for the installation. 제 4 항에 있어서, 상기 저항을 가변저항으로 하는 것을 특징으로 하는 누설전유 방지회로.5. The leakage oil prevention circuit according to claim 4, wherein the resistance is a variable resistor. 제 1 항에 있어서, 상기 누설전류 보상회로를, 상기 삼상교류전류의 상기 접지상배선 이외의 2개의 상배선의, 상기 접지상에 대해 전압위상이 120도 앞선 상배선에는 단상절연변압기의 정극입력단자를, 또 상기 접지상에 대해 전압위상이 120도 늦은 상배선에는 상기 단상 절연변압기의 부극입력단자를 각각 접속하고, 상기 단상절연변압기의 정극출력단자에 리액터, 저항 및 콘덴서의 직렬회로의 한쪽 단자를 접속하고, 이 직렬회로의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하며, 상기 단상절연변압기의 부측출력단자를 상기 전기기기의 접지상배선이 접속되는 교류입력단자에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.2. The positive electrode input of the single-phase insulated transformer according to claim 1, wherein the leakage current compensation circuit is connected to a phase wiring of two phase wirings other than the ground phase wiring of the three-phase alternating current, the voltage phase of which is 120 degrees before the ground phase. A terminal and a negative input terminal of the single phase insulated transformer are connected to a phase wiring of which the voltage phase is 120 degrees later than the ground phase, respectively, and one of the series circuits of a reactor, a resistor and a capacitor is connected to the positive output terminal of the single phase insulated transformer. Terminal is connected, and the other terminal of the series circuit is connected to the ground terminal of the electric equipment or the equipment ground line, and the side output terminal of the single phase insulated transformer is connected to an AC input terminal to which the ground phase wiring of the electrical equipment is connected. Leakage current prevention circuit, characterized in that the connection. 어느 1개의 상배선이 전원접지선에 의해 접지된 단상교류전원과, 단상교류입력단자가 접지콘덴서를 통해 전기접지선에 의해 접지된 전기기기를 단상전원배선에 의해 접속하고, 또, 상기 단상교류전원과 전기기기를 접속하는 전원배선의 경로에 누설전류검출기를 접속함과 동시에, 상기 단상교류전원이 접지되지 않는 전원단자로 부터, 상기 누설전류검출기와, 전원배선과 여기에 접속된 상기 기기기내의 상기 접지콘덴서를 경유하여 흐르는 누설전류에 대해, 이것과 역위상으로 동일진폭의 전류가 흐르도록 누설전류보상회로를 설치함으로써, 상기 전원접지선과 상기 기기접지선에 흐르는 전류를 거의 0으로 하여, 상기 누설전류검출기의 상기 접지콘덴서에 의한 오동작을 방지하는 것을 특징으로 하는 누설전류 방지회로.The single-phase AC power supply in which any one phase wiring is grounded by the power grounding wire, and the single-phase AC power supply terminal are connected to the electrical equipment grounded by the electrical grounding line through the grounding capacitor, by the single-phase power supply wiring. The leakage current detector is connected to the path of the power supply wiring for connecting the electrical equipment, and the leakage current detector and the power supply wiring and the inside of the equipment connected to the power supply terminal are not connected to the single-phase AC power supply. The leakage current compensation circuit is provided so that a current having the same amplitude flows in the reverse phase with respect to the leakage current flowing through the ground capacitor, so that the current flowing through the power supply ground line and the device ground line is almost zero, and the leakage current A leakage current preventing circuit, wherein the malfunction of the ground capacitor of the detector is prevented. 제 9 항에 있어서, 상기 누설전류 보상회로를, 상기 단상교류전원의 전원접지선에 접속된 접지상배선과 전원접지선에 접속되어 있지 않은 상배선 사이에, 단상절연변압기의 정극입력 단자와 부극입력단자를 각각 접속하고, 이 단상절연변압기의 부극출력단자를 접지상배선에 접속하며, 정극출력단자를 콘덴서의 한쪽단자에 접속하고, 이 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.10. The positive electrode input terminal and the negative electrode input terminal of the single-phase insulated transformer according to claim 9, wherein the leakage current compensating circuit is connected between a ground phase wiring connected to the power grounding line of the single-phase AC power supply and a phase wiring not connected to the power grounding line. Are connected respectively, and the negative output terminal of the single-phase insulated transformer is connected to the ground phase wiring, the positive output terminal is connected to one terminal of the capacitor, and the other terminal of the capacitor is connected to the ground terminal of the electric device or the device ground line. Leakage current prevention circuit, characterized in that connected to the configuration. 제 9 항에 있어서, 상기 누설전류 보상회로를, 상기 단상교류전원의 전원접지선에 접속된 접지상배선과 전원접지선에 접속되어 있지않은 상배선 사이에, 단상단권변압기의 중간 단자와 부극단자를 각각 접속하며, 이 단상단권변압기의 정극단자를 콘덴서의 한쪽 단자에 접속하고, 이 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.10. The intermediate terminal and the negative terminal of the single phase single winding transformer according to claim 9, wherein the leakage current compensating circuit is connected between a ground phase wiring connected to a power grounding line of the single phase ac power supply and a phase wiring not connected to a power grounding line. And the positive terminal of the single-phase single winding transformer is connected to one terminal of the capacitor, and the other terminal of the capacitor is connected to the ground terminal of the electric equipment or the device ground line. 제 9 항에 있어서, 상기 누설전류 보상회로를, 상기 단상교류전원의 전원접지선에 접속된 접지상배선과 전원접지선에 접속되어 있지않은 상배선 사이에, 단상단권가변출력변압기의 정극측 입력단자와 부극측 입력단자를 각각 접속하며, 이 단상단권가변출력변압기의 출력단자를 콘덴서의 한쪽 단자에 접속하며, 이 콘덴서의 다른쪽 단자를 상기 전기 기기의 접지단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.10. The positive electrode input terminal of the single-phase single winding variable output transformer according to claim 9, wherein the leakage current compensating circuit is connected between a ground phase wiring connected to the power grounding line of the single-phase AC power supply and a phase wiring not connected to the power grounding line. And connecting the negative input terminal respectively, connecting the output terminal of the single-phase single variable output transformer to one terminal of the condenser, and connecting the other terminal of the condenser to the ground terminal or the device ground line of the electric equipment. Leakage current prevention circuit characterized in. 중성점이 접지된 성형 결선 이상 3선식교류전원과, 교류입력단자가 접지콘덴서를 통해 기기접지선에 의해 접지된 전기기를 단상의 전원배선에 의해 접속하며, 또 상기 단상교류전원과 전기기기를 접속하는 전원배선의 경로에 누설전류 검출기를 접속함과 동시에 , 상기 교류전원이 접지되지 않은 전원단자로 부터, 상기 누설전류검출기와 전원 배선과 이것에 접속된 상기 전기기기 내의 상기 접지콘덴서를 경유하여 흐르는 누설 전류에 대해, 이것과 역위상으로 동일진폭의 전류가 흐르도록 누설전류 보상회로를 설치함으로써, 상기 전원접지선과 상기 기기접지선에 흐르는 전류를 거의 0으로 하여, 상기 누설전류검출기의 상기 접지콘덴서에 의한 오동작을 방지하는 것을 특징으로 하는 누설전류 방지회로.Molded wiring fault with a neutral point grounded Three-wire AC power supply and AC input terminal are connected to the grounded capacitor via a grounding capacitor to an electrical device connected by a single-phase power supply wiring, and a power supply for connecting the single-phase AC power supply to the electrical equipment. The leakage current flowing through the leakage current detector and the power supply wiring and the ground capacitor in the electrical device connected thereto while connecting the leakage current detector to the wiring path and simultaneously from the power terminal with which the AC power is not grounded. By providing a leakage current compensating circuit so that a current of the same amplitude flows in reverse phase with this, the current flowing through the power supply ground line and the device ground line is made almost zero, thereby causing malfunction of the ground current capacitor of the leakage current detector. Leakage current prevention circuit, characterized in that to prevent. 제13항에 있어서, 상기 누설전류 보상회로를, 상기 교류전원중 접지된 중성점 접지배선과 전원접지선에 접속되어 있지않은 제 1 상배선 사이에, 제 1 단상절연변압기의 정극입력단자와 부극입력단자를 각각 접속하며, 상기 중성점 접지배선과 전원접지선에 접속되어 있지 않는 제 2 상배선 사이에 제 2 단상절연변압기의 정극입력단자와 부극입력단자를 각각 접속하며, 상기 제1, 제 2 단상절연변압기의 부극출력단자를 중성점 접지배선에 각각 접속하고, 상기 제 1 단상절연변압기의 정극출력단자를 제 1 콘덴서의 한쪽 단자에 접속하고, 이 제 1 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하고, 상기 제 2 단상절연변압기의 정극출력단자를 제 2 의 콘덴서의 한쪽 단자에 접속하고, 이 제 2 콘덴서의 다른쪽 단자를 상기 전기기기의 접속단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.The positive electrode input terminal and the negative electrode input terminal of the first single-phase insulated transformer according to claim 13, wherein the leakage current compensating circuit is connected between the neutral point ground wiring grounded in the AC power supply and the first phase wiring not connected to the power grounding line. And a positive input terminal and a negative input terminal of the second single phase insulated transformer, respectively, between the neutral ground wiring and the second phase wiring not connected to the power grounding line. Are connected to the neutral ground wiring, respectively, the positive output terminal of the first single phase insulated transformer is connected to one terminal of the first capacitor, and the other terminal of the first capacitor is connected to the ground terminal of the The positive electrode output terminal of the second single-phase insulated transformer to one terminal of the second capacitor, and connect the other terminal of the second capacitor to A leakage current preventing circuit, characterized in that configured to be connected to the connection terminal of the electrical equipment or the equipment ground line. 각상의 접합점이 접지된 V결선삼상 3선식교류전원과, 교류입력단자가 접지콘덴서를 통해 기기접지선에 의해 전기기기를 삼상3선의 전원배선에 의해 접속하며, 또, 상기 교류전원과 전기기기를 접속하는 전원배선의 경로에 누설전류검출기를 접속함과 동시에, 상기 교류전원의 접지되지 않은 전원단자로 부터, 상기 누설전류검출기와 전원 배선과 이것에 접속된 상기 전기기기 내의 상기 접지콘덴서를 경유하여 흐르는 누설전류에 대해, 이것과 역위상으로 동일진폭의 전류가 흐르도록 누설전류 보상회로를 설치함으로써, 상기전원접지선과 상기 기기접지선에 흐르는 전류를 거의 0으로 하여, 상기 누설전류검출기의 상기 접지콘덴서에 의한 오동작을 방지하는 것을 특징으로 하는 누설전류 방지회로.V-connected three-phase three-wire AC power supply with the junction point of each phase connected to the AC input terminal connected to the equipment grounding line through the grounding capacitor, and connected to the three-phase three-wire power supply wiring. The leakage current detector is connected to the path of the power supply wiring, and flows from the ungrounded power supply terminal of the AC power supply through the leakage current detector and the power supply wiring and the ground capacitor in the electrical device connected thereto. By providing a leakage current compensation circuit so that a current of the same amplitude flows in the reverse phase with respect to the leakage current, the current flowing through the power supply ground line and the device ground line is set to almost zero, and the ground capacitor of the leakage current detector Leakage current prevention circuit, characterized in that to prevent malfunction caused by. 제15항에 있어서, 상기 누설전류 보상회로를, 상기 교류전원중 접지된 접지상배선과 전원접지선에 접속되지 않은 제 1 상배선 사이에, 제 1 단상절연변압기의 정극입력단자와 부극입력단자를 각각 접속하며, 상기 접지상배선과 전원접지선에 접속되지 않은 제 2 의 상배선사이에, 제 2 의 단상절연변압기의 정극입력단자와 부극입력단자를 각각 접속하며, 상기 제1, 제 2 단상절연변압기의 부극출력단자를 접지상배선에 각각 접속하며, 상기 제1 단상절연변압기의 정극출력단자를 제 1 콘덴서의 한쪽 단자에 접속하며, 이 제 1 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하며, 상기 제 2 단상절연변압기의 정극출력단자를 제 2 콘덴서의 한쪽 단자에 접속하며, 이 제 2 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.16. The positive electrode input terminal and the negative electrode input terminal of claim 1, wherein the leakage current compensation circuit is connected between the grounded phase wiring of the AC power supply and the first phase wiring not connected to the power grounding line. The positive and negative input terminals of the second single-phase insulated transformer are respectively connected between the ground phase wiring and the second phase wiring not connected to the power ground line, respectively, and the first and second single phase insulation are respectively connected. The negative output terminal of the transformer is connected to the ground phase wiring, respectively, and the positive output terminal of the first single phase insulated transformer is connected to one terminal of the first capacitor, and the other terminal of the first capacitor is connected to the ground terminal of the electric device. Or a ground terminal of the electric device, connected to the device ground line, the positive output terminal of the second single phase insulated transformer being connected to one terminal of the second capacitor, and the other terminal of the second capacitor The leakage current protection circuit characterized in that the configuration devices connected to the ground line. 제15항에 있어서, 상기 누설전류 보상회로를, 상기 교류전원의 상배선을 삼상성형 단권변압기의 중간단자에 각각 접속하며, 상기 심상성형 단권변압기의 접지상이 접속되어 있는 전선의 출력단자를 콘덴서의 한쪽 단자에 접속하며, 이 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설방지회로.16. The output terminal of the wire according to claim 15, wherein the leakage current compensating circuit connects the phase wiring of the AC power supply to the intermediate terminal of the three-phase single winding transformer, and the output terminal of the wire to which the ground phase of the image forming single winding transformer is connected. And a terminal connected to one terminal, wherein the other terminal of the capacitor is connected to the ground terminal of the electric device or the device ground line. 제15항에 있어서, 상기 누설전류 보상회로를, 상기 교류전원의 상배선을 삼상성형 단권가변출력 변압기의 입력단자에 각각 접속하며, 상기 삼상성형 단권변압기의 접지상이 접속되어 있는 전선의 출력단자를 콘덴서의 한쪽 단자에 접속하며, 이 콘덴서의 다른쪽 단자를 상기 전기기기의 접지단자 또는 상기 기기접지선에 접속하여 구성하는 것을 특징으로 하는 누설전류 방지회로.16. The output terminal of the electric wire according to claim 15, wherein the leakage current compensating circuit is connected to a phase wiring of the AC power supply to an input terminal of a three-phase single winding variable output transformer, respectively, and the ground terminal of the three phase single winding transformer is connected. And a terminal connected to one terminal of the capacitor, wherein the other terminal of the capacitor is connected to the ground terminal of the electric device or the device ground line. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940003325A 1993-03-04 1994-02-24 Leakage current prevention circuit KR940022101A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5043092A JPH06261442A (en) 1993-03-04 1993-03-04 Leakage current preventive circuit
JP93-43092 1993-03-04

Publications (1)

Publication Number Publication Date
KR940022101A true KR940022101A (en) 1994-10-20

Family

ID=12654201

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940003325A KR940022101A (en) 1993-03-04 1994-02-24 Leakage current prevention circuit

Country Status (2)

Country Link
JP (1) JPH06261442A (en)
KR (1) KR940022101A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101311244B1 (en) * 2011-12-30 2013-09-25 윤영민 Controlling device for an electric leakage of medical facilities

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7440874B2 (en) 2000-08-17 2008-10-21 Industrial Origami, Inc. Method of designing fold lines in sheet material
FR2977086B1 (en) * 2011-06-22 2013-06-14 Renault Sa SYSTEM AND METHOD FOR COMPENSATING AN ON-BOARD BATTERY CHARGER IN A VEHICLE
FR2984621B1 (en) * 2011-12-14 2014-01-17 Renault Sa SYSTEM AND METHOD FOR HIGH FREQUENCY LEAKAGE CURRENT COMPENSATION FOR MOTOR VEHICLE.
CN105790213B (en) * 2016-04-14 2019-01-22 袁月春 A kind of residual current counteracting method and its earth leakage protective device
JP7013086B2 (en) * 2017-10-17 2022-01-31 株式会社関電工 Leakage current suppressor
CN111934298A (en) * 2020-07-16 2020-11-13 深圳市雷蓝电气科技有限公司 Electric shock protection device
DE102021111858B3 (en) * 2021-05-06 2022-08-11 Bender Gmbh & Co. Kg Method and measuring device for determining a leakage current in an unearthed, single-phase AC power supply system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101311244B1 (en) * 2011-12-30 2013-09-25 윤영민 Controlling device for an electric leakage of medical facilities

Also Published As

Publication number Publication date
JPH06261442A (en) 1994-09-16

Similar Documents

Publication Publication Date Title
US7050279B2 (en) Method and apparatus for high impedance grounding of medium voltage AC drives
GB1169706A (en) An Electrical Fault Detector
SK279599B6 (en) Arrangement for detecting stator earth leakages in three-phase current machines
GB2397445A (en) Power transmission circuits
KR940022101A (en) Leakage current prevention circuit
US5488303A (en) GFCI with auxiliary coil current blocking means and improved test button configuration
US2280950A (en) Pilot wire system with means for neutralizing induced voltages
US5047890A (en) Differential current protection circuits
RU2733535C1 (en) Inverter device
KR102349343B1 (en) Switchboard having three phases open and netural line protecting function
US4510399A (en) Demodulator circuit for parallel AC power systems
JPH11299264A (en) Method and apparatus for suppressing common mode voltage of inverter
JP2009148045A (en) Leak current reducing device
SU760295A1 (en) Device for compensating for single-phase earthing current
SU743103A1 (en) Arrangement for current leakage protection in double-wire dc mains
RU2052826C1 (en) Trouble-shooting device for d
SU1166212A1 (en) Device for current leakage protection in three-phase isolated neutral system
SU1358031A1 (en) Arrangement for protection from earthing in electric network with insulated neutral
SU743101A1 (en) Method and device for selective protection of three-phase mains with insulated neutral wire from single-phase earthing
FI60328B (en) ELEKTRISK ANORDNING MED FOERBAETTRAD ISOLATION
SU408240A1 (en) DEVICE FOR CONTINUOUS MONITORING ISOLATION
SU922947A1 (en) Device for earthing power transformer neutral wire
JPH0311921A (en) Ground-fault detecting and protecting device
JP2023170137A (en) Power conversion device
SU1406522A1 (en) Device for checking active parameters of phase insulation of electric mains with insulated neutral

Legal Events

Date Code Title Description
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid