JPH07123580A - Operation checker for earth leakage breaker with open-phase protective function for single phase and three-phase - Google Patents

Operation checker for earth leakage breaker with open-phase protective function for single phase and three-phase

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Publication number
JPH07123580A
JPH07123580A JP5259991A JP25999193A JPH07123580A JP H07123580 A JPH07123580 A JP H07123580A JP 5259991 A JP5259991 A JP 5259991A JP 25999193 A JP25999193 A JP 25999193A JP H07123580 A JPH07123580 A JP H07123580A
Authority
JP
Japan
Prior art keywords
phase
wire
voltage
open
load
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP5259991A
Other languages
Japanese (ja)
Other versions
JP2549981B2 (en
Inventor
Minoru Takemoto
稔 竹本
Tatsuo Okudaira
辰生 奥平
Kenji Mise
賢二 三瀬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kansai Electric Power Co Inc
Original Assignee
Kansai Electric Power Co Inc
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 Kansai Electric Power Co Inc filed Critical Kansai Electric Power Co Inc
Priority to JP5259991A priority Critical patent/JP2549981B2/en
Publication of JPH07123580A publication Critical patent/JPH07123580A/en
Application granted granted Critical
Publication of JP2549981B2 publication Critical patent/JP2549981B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To provide an operation checker for open-phase protection ELB in which the open-phase protective function can be checked easily at site. CONSTITUTION:Power supply terminals 3, 4 are connected through a power supply switch 6, a fuse 7, and a current limit resistor 8 with the fixed terminals 9a, 9b of a variable resistor 9 whereas a detection terminal 2 is connected through a detection switch 5 with the sliding terminal 9c of the variable resistor 9. The power supply terminals 3, 4 are also connected with the load side voltage line terminals 54, 56 of an ELB 50 and the detection terminal 2 is connected with the overvoltage detection lead wire 69 removed from the load side neutral. When the dial of the variable resistor 9 is turned from an intermediate position, the voltage between any one of terminals 54, 56 and the lead wire 69 increases and the ELB 50 is opened when a predetermined voltage is exceeded.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は単相3線式用欠相保護
機能付漏電遮断器(以下、欠相保護付ELBと略記す
る。)の動作チェッカに関し、特に、欠相保護付ELB
の欠相保護動作の点検に使用する欠相保護付ELBの動
作チェッカに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation checker for an earth leakage circuit breaker with an open-phase protection function for a single-phase 3-wire system (hereinafter abbreviated as ELB with open-phase protection), and more particularly to an ELB with open-phase protection.
The operation checker of the ELB with open phase protection used for checking the open phase protection operation of.

【0002】[0002]

【従来の技術】従来より、単相3線式の配電方式が知ら
れている。単相3線式は、2本の電圧線L1 ,L2 と1
本の中性線Nを使用して各電圧線L1 ,L2 と中性線N
の間に100(V)の電圧を配電し、電圧線L1 ,L2
間に200(V)の電圧を配電する方式である。このよ
うな単相3線式は2線式に比べて大容量化が可能という
ことから一般住宅に広く普及し、一般住宅の引込線32
の単相3線化率は日本全体で47.1%(平成4年
度)、関西電力管内では68.0%に達している。
2. Description of the Related Art Conventionally, a single-phase three-wire type power distribution system has been known. The single-phase three-wire system has two voltage lines L 1 , L 2 and 1
Using the neutral line N of the book, each voltage line L 1 , L 2 and the neutral line N
And distribution voltage of 100 (V) between the voltage line L 1, L 2
It is a method of distributing a voltage of 200 (V) between them. Such a single-phase three-wire system is widely used in general houses because it can have a larger capacity than the two-wire system, and the service line 32 of the general house is widely used.
The single-phase three-wire conversion rate has reached 47.1% in Japan as a whole (1992) and 68.0% in the Kansai Electric Power area.

【0003】図5は単相3線式の配線図である。電力会
社の設備である電柱31の配電端子31aと各家庭の受
電端子33は引込線32で接続されており、受電端子3
3は引込口配線34により電力量計35を介して分電盤
36の漏電遮断器37に接続されている。分電盤36に
は複数の配線用遮断器38が設けられており、漏電遮断
器37の3つの負荷側端子のうちの適当な2つが配線3
9により配線用遮断器38を介して各部屋のコンセント
や各種電気機器に接続されている。たとえば図6(a)
に示すように、電圧線L1 ,L2 が定格電圧200
(V),消費電力2000(W)の空調機40に接続さ
れ、電圧線L1 および中性線Nが100(V),200
(W)のテレビ41に接続され、電圧線L2 および中性
線Nが100(V),40(W)の蛍光灯42および1
00(V),40(W)の白熱電球43に接続される。
FIG. 5 is a wiring diagram of a single-phase three-wire system. The power distribution terminal 31a of the utility pole 31, which is a facility of the power company, and the power receiving terminal 33 of each home are connected by the service line 32.
3 is connected to the earth leakage breaker 37 of the distribution board 36 via the electricity meter 35 by the inlet wiring 34. The distribution board 36 is provided with a plurality of circuit breakers 38 for wiring, and an appropriate two of the three load side terminals of the earth leakage circuit breaker 37 are connected to the wiring 3.
9 is connected to an outlet in each room and various electric devices via a circuit breaker 38 for wiring. For example, FIG. 6 (a)
, The voltage lines L 1 and L 2 have a rated voltage of 200
(V), power consumption 2000 (W) connected to the air conditioner 40, the voltage line L 1 and the neutral line N are 100 (V), 200
A fluorescent lamp 42 and 1 connected to a (W) television 41 and having a voltage line L 2 and a neutral line N of 100 (V) and 40 (W).
It is connected to an incandescent light bulb 43 of 00 (V) and 40 (W).

【0004】しかし、単相3線式には、中性線Nに断線
や接触不良が生じた場合(このような事故を中性線欠相
事故という。)、100(V)用の電気機器に過電圧が
加わって電気機器が故障したり、焼損することがあっ
た。すなわち、図6(a)に示した配線図で中性線Nが
欠相した場合、図6(b)に示すように、200(V)
の電圧が蛍光灯42および白熱電球43の並列体とテレ
ビ41に分配され、前者には143(V)が加わり後者
には57(V)が加わる。したがって、蛍光灯42およ
び白熱電球43が焼損する。なお、各電圧は次式(3)
(4)で求められる。
However, in the single-phase three-wire system, when a disconnection or a contact failure occurs in the neutral wire N (such an accident is called a neutral wire open-phase accident), electric equipment for 100 (V) There was a case where an overvoltage was applied to the electric equipment and the electric equipment failed or burned. That is, when the neutral wire N has a missing phase in the wiring diagram shown in FIG. 6A, as shown in FIG.
Is distributed to the parallel body of the fluorescent lamp 42 and the incandescent lamp 43 and the television 41, and 143 (V) is added to the former and 57 (V) is added to the latter. Therefore, the fluorescent lamp 42 and the incandescent lamp 43 are burned out. Each voltage is expressed by the following equation (3)
It is calculated in (4).

【0005】 200(V)×125(Ω)/[50(Ω)+125(Ω)]=143(V) …(3) 200(V)×50(Ω)/[50(Ω)+125(Ω)]=57(V) … (4) そこで、中性線欠相が発生した場合、それを検知して電
源側と負荷側を遮断する機能を持つ欠相保護付ELB5
0が開発された。図7は欠相保護付ELB50の構成を
示すブロック図である。この欠相保護付ELB50にあ
っては、装置の外部に電源側電圧線用端子51,53、
電源側中性線用端子52、負荷側電圧線用端子54,5
6、負荷側中性線用端子55および過電圧検出用リード
線69が設けられている。電源側端子51,52,53
は図5に示したように引込口配線34を介して電力量計
35に接続され、負荷側端子54,55,56は配線3
9を介して配線遮断器38に接続され、過電圧検出用リ
ード線69は分電盤36中に設けられた中性線バー(図
示せず)に接続される。
200 (V) × 125 (Ω) / [50 (Ω) +125 (Ω)] = 143 (V) (3) 200 (V) × 50 (Ω) / [50 (Ω) +125 (Ω) )] = 57 (V) (4) Therefore, when a neutral wire open phase occurs, the ELB5 with open phase protection has a function of detecting it and shutting off the power supply side and the load side.
0 was developed. FIG. 7 is a block diagram showing the configuration of the ELB 50 with open phase protection. In the ELB 50 with phase loss protection, power source side voltage line terminals 51, 53, and
Power supply side neutral wire terminal 52, load side voltage wire terminal 54, 5
6, a load-side neutral wire terminal 55 and an overvoltage detection lead wire 69 are provided. Power supply side terminals 51, 52, 53
Is connected to the watt-hour meter 35 via the inlet port wiring 34 as shown in FIG. 5, and the load side terminals 54, 55, 56 are the wiring 3
9 is connected to the wiring breaker 38, and the overvoltage detection lead wire 69 is connected to a neutral wire bar (not shown) provided in the distribution board 36.

【0006】また、電源側端子51,52,53と負荷
側端子54,55,56とは装置内部において、メイン
スイッチ58および過電流防止用のバイメタル61を介
して接続されている。メインスイッチ58は、装置外部
から手動によりオンオフさせられる他(図2参照)、電
磁コイル59の電磁力によりオフされる。装置内には漏
電検出部65および過電圧検出部66を含む電子回路6
4が設けられており、電磁コイル59は電子回路64に
よって駆動される。漏電検出部65は、ゼロ電流トラン
ス(ZCT)63によって負荷側に流れる電流と電源側
に戻る電流のバランスを検出し、漏電の有無を判断す
る。電流のバランスが崩れたときは漏電が発生したと判
断し、電磁コイル59へ給電してメインスイッチ58を
オフする。
Further, the power supply side terminals 51, 52, 53 and the load side terminals 54, 55, 56 are connected inside the apparatus through a main switch 58 and an overcurrent preventing bimetal 61. The main switch 58 is manually turned on and off from outside the device (see FIG. 2) and is turned off by the electromagnetic force of the electromagnetic coil 59. An electronic circuit 6 including a leakage detection unit 65 and an overvoltage detection unit 66 in the device
4 is provided, and the electromagnetic coil 59 is driven by the electronic circuit 64. The leakage detecting unit 65 detects the balance between the current flowing to the load side and the current returning to the power source side by the zero current transformer (ZCT) 63, and determines the presence or absence of leakage. When the current balance is lost, it is determined that a leakage has occurred, and the electromagnetic coil 59 is supplied with power to turn off the main switch 58.

【0007】過電圧検出部66は、電圧検出端子66
a,66bの端子間電圧Vが所定のしきい値Vthより大
きくなったときに中性線欠相が発生したと判断し、電磁
コイル59へ給電してメインスイッチ58をオフする。
詳しく説明すると、一方電圧検出端子66aはダイオー
ド67,68のカソードに接続されており、ダイオード
67,68のアノードは負荷側電圧線用端子54,56
に接続されている。また、他方電圧検出端子66bは過
電圧検出リード線69に接続されている。したがって、
電圧検出端子66a,66b間には、図7に示すよう
に、電圧線L1 ,L 2 の交流電圧v1 ,v2 が半波整流
された直流電圧V1 ,V2 が交互に現われる。正常時は
直流電圧V1 と直流電圧V2 は互いに等しいが、中性線
欠相が発生したときはたとえば直流電圧V1 が大きくな
り、その分直流電圧V2 が小さくなる。過電圧検出部6
6は、直流電圧V1 がしきい値Vthを超えたときに中性
線欠相が発生したと判断する。
The overvoltage detecting section 66 includes a voltage detecting terminal 66.
The voltage V between the terminals a and 66b is a predetermined threshold value VthGreater than
It is judged that the neutral phase open phase has occurred when
Power is supplied to the coil 59 to turn off the main switch 58.
More specifically, the voltage detection terminal 66a is connected to the diode.
Diode connected to the cathode of
The anodes of 67 and 68 are load side voltage line terminals 54 and 56.
It is connected to the. On the other hand, the voltage detection terminal 66b is
It is connected to the voltage detection lead wire 69. Therefore,
Between the voltage detection terminals 66a and 66b, as shown in FIG.
To the voltage line L1, L 2AC voltage v1, V2Half-wave rectification
DC voltage V1, V2Appear alternately. When normal
DC voltage V1And DC voltage V2Are equal to each other, but neutral
When the open phase occurs, for example, the DC voltage V1Is big
DC voltage V2Becomes smaller. Overvoltage detector 6
6 is a DC voltage V1Is the threshold VthNeutral when crossed
Judge that the open phase has occurred.

【0008】なお、漏電表示ボタン60は、電磁リレー
58のメインスイッチ58と連動し、メインスイッチ5
8がオフしたときに突出する。また、テストボタン62
は漏電検出機能が正常であるか否かをチェックするため
のものである。
The earth leakage display button 60 is interlocked with the main switch 58 of the electromagnetic relay 58, and the main switch 5
It projects when 8 is turned off. Also, the test button 62
Is for checking whether the leakage detection function is normal.

【0009】[0009]

【発明が解決しようとする課題】このような欠相保護付
ELB50の耐用年数はメーカーによると10年程度で
あるが、従来の欠相保護付ELB50には欠相保護機能
をチェックする機能が設けられておらず、また、欠相保
護機能を現場でチェックするための測定器もなかった。
したがって、定期検査時には漏電機能をチェックするこ
とができるが、欠相保護機能をチェックすることはでき
なかった。また、耐用年数を超えた欠相保護付ELB5
0が開放されて停電した場合に、実際に中性線欠相は生
じたのか欠相保護付ELB50が故障したのか判別する
ことができず、停電の原因究明に時間がかかっていた。
According to the manufacturer, the useful life of such an ELB50 with open phase protection is about 10 years, but the conventional ELB50 with open phase protection is provided with a function for checking the open phase protection function. There was no measuring instrument for checking the open-phase protection function in the field.
Therefore, the leakage function can be checked during the periodic inspection, but the open-phase protection function cannot be checked. ELB5 with open-phase protection that exceeds its useful life
When 0 was released and a power failure occurred, it was impossible to determine whether the neutral wire open phase actually occurred or the ELB 50 with open phase protection failed, and it took time to investigate the cause of the power failure.

【0010】それゆえに、この発明の主たる目的は、欠
相保護付ELBの欠相保護機能を現場で容易にチェック
することができる欠相保護付ELBの動作チェッカを提
供することである。
Therefore, a main object of the present invention is to provide an operation checker for an ELB with open phase protection, which can easily check the open phase protection function of the ELB with open phase protection on site.

【0011】[0011]

【課題を解決するための手段】この発明は負荷側中性線
に接続された過電圧検出用リード線および負荷側中性線
用端子と、それぞれが負荷側電圧線に接続された2つの
負荷側電圧線用端子とを含み、前記負荷側電圧線用端子
のいずれか一方と前記過電圧検出用リード線の間の電圧
が所定電圧より大きくなったときに電源側と負荷側を遮
断する単相3線式用欠相保護機能付漏電遮断器の動作チ
ェッカにおいて、2つの固定端子と該固定端子間の抵抗
体上を移動可能に設けられた摺動端子とを含み、前記固
定端子はそれぞれ前記負荷側電圧線用端子に接続され、
前記摺動端子は前記負荷側中性線から外された前記過電
圧検出用リード線に接続される可変抵抗器と、前記可変
抵抗器に流れる電流を制限するための電流制限抵抗とを
備えたことを特徴としている。
According to the present invention, there are provided an overvoltage detection lead wire and a load side neutral wire terminal connected to a load side neutral wire, and two load sides each connected to a load side voltage wire. A single-phase 3 that includes a voltage line terminal and shuts off the power supply side and the load side when the voltage between any one of the load side voltage line terminals and the overvoltage detection lead wire exceeds a predetermined voltage. In an operation checker of an earth leakage circuit breaker with a wire-type open phase protection function, two fixed terminals and a sliding terminal movably provided on a resistor between the fixed terminals are included, and each of the fixed terminals includes the load. Connected to the terminal for the side voltage line,
The sliding terminal includes a variable resistor connected to the overvoltage detection lead wire removed from the load-side neutral wire, and a current limiting resistor for limiting a current flowing through the variable resistor. Is characterized by.

【0012】また、前記2つの負荷側電圧線用端子のい
ずれか一方と前記負荷側中性線から外された前記過電圧
検出用リード線の間の電圧を測定するための電圧計を備
えてもよい。
Further, a voltmeter for measuring a voltage between any one of the two load side voltage line terminals and the overvoltage detection lead wire removed from the load side neutral line may be provided. Good.

【0013】また、前記電圧計の電圧測定用端子を前記
2つの負荷側電圧線用端子のいずれか一方に切換えて接
続するための切換スイッチを備えてもよい。
A changeover switch may be provided for switching and connecting the voltage measuring terminal of the voltmeter to one of the two load side voltage line terminals.

【0014】また、前記可変抵抗器の摺動端子と前記負
荷側中性線から外された前記過電圧検出用リード線とを
接続するための検出スイッチを備えてもよい。
A detection switch may be provided for connecting the sliding terminal of the variable resistor and the overvoltage detection lead wire removed from the load-side neutral wire.

【0015】また、前記検出スイッチをオンしてから前
記単相3線式用欠相保護機能付漏電遮断器が開放される
までの時間を計測するためのタイマーを備えてもよい。
Further, a timer may be provided for measuring the time from turning on of the detection switch to opening of the earth leakage circuit breaker with a single-phase three-wire type open-phase protection function.

【0016】[0016]

【作用】この発明に係る欠相保護付ELBの動作チェッ
カにあっては、2つの固定端子とその間の抵抗体上を移
動可能に設けられた摺動端子とを含む可変抵抗器を備え
ており、可変抵抗器の固定端子は欠相保護付ELBの負
荷側電圧線用端子に接続され、摺動端子は負荷側中性線
から外された過電圧検出用リード線に接続される。可変
抵抗器の摺動端子を2つの固定端子の中間に位置させて
おくと、摺動端子と各固定端子間にはそれぞれ100
(V)の電圧が印加される。次いで、摺動端子を一方の
固定端子に近づけていくと、その固定端子と摺動端子の
間の電圧は100(V)より小さくなり、他方の固定端
子と摺動端子の間の電圧は100(V)より大きくな
る。そして、他方の固定端子と摺動端子の間の電圧が所
定電圧を超えたとき、欠相保護機能が正常であれば欠相
保護付ELBは開放される。したがって、欠相保護付E
LBの欠相保護機能を現場で容易にチェックすることが
できる。
The operation checker of the ELB with phase loss protection according to the present invention is provided with the variable resistor including two fixed terminals and sliding terminals movably provided on the resistor between them. The fixed terminal of the variable resistor is connected to the load side voltage wire terminal of the ELB with open phase protection, and the sliding terminal is connected to the overvoltage detection lead wire removed from the load side neutral wire. If the sliding terminal of the variable resistor is placed in the middle of the two fixed terminals, it will be 100 between the sliding terminal and each fixed terminal.
A voltage of (V) is applied. Next, when the sliding terminal is brought closer to one of the fixed terminals, the voltage between the fixed terminal and the sliding terminal becomes less than 100 (V), and the voltage between the other fixed terminal and the sliding terminal becomes 100. It becomes larger than (V). Then, when the voltage between the other fixed terminal and the sliding terminal exceeds the predetermined voltage, the ELB with open phase protection is opened if the open phase protection function is normal. Therefore, E with open-phase protection
The open phase protection function of the LB can be easily checked on site.

【0017】また、電流制限抵抗によって可変抵抗器に
流れる電流を制限するので、可変抵抗器の摺動端子を一
方の固定端子に近接させた場合でも、過電流によって可
変抵抗器が焼損することがない。
Further, since the current flowing through the variable resistor is limited by the current limiting resistor, even if the sliding terminal of the variable resistor is brought close to one of the fixed terminals, the overcurrent may cause the variable resistor to burn out. Absent.

【0018】[0018]

【実施例】図1はこの発明の一実施例による欠相保護付
ELBの動作チェッカ1の構成および使用状態を示す電
気回路図、図2はその外観および使用状態を示す正面図
である。この動作チェッカ1にあっては、たとえば直方
体型のケース1aの一面に過電圧リード線用端子2、電
圧線用端子3,4、検出スイッチ5、電源スイッチ6、
電圧計11の表示盤、電圧計切換スイッチ10、可変抵
抗器9のダイヤル9aおよびレコーダ用端子12,13
が設けられている。電源スイッチ6は2つのスイッチ6
a,6bを含む連動スイッチである。
1 is an electric circuit diagram showing the configuration and usage of an operation checker 1 for an ELB with phase loss protection according to an embodiment of the present invention, and FIG. 2 is a front view showing its appearance and usage. In this operation checker 1, for example, an overvoltage lead wire terminal 2, voltage wire terminals 3 and 4, a detection switch 5, a power switch 6 are provided on one surface of a rectangular parallelepiped case 1a.
Display panel of voltmeter 11, voltmeter selector switch 10, dial 9a of variable resistor 9 and recorder terminals 12, 13
Is provided. Power switch 6 is two switches 6
The interlock switch includes a and 6b.

【0019】電圧線用端子3,4はケース1a内におい
てそれぞれ電源スイッチ6のスイッチ6a,6b、ヒュ
ーズ7,7、接続ノードN1,N2、電流制限抵抗8,
8を介して可変抵抗器9の固定端子9a,9bに接続さ
れており、過電圧リード線用端子2は検出スイッチ5を
介して可変抵抗器9の摺動端子9cに接続されている。
また、電圧計11の電圧測定用端子11a,11bはそ
れぞれレコーダ用端子12,13に接続されており、端
子11aは可変抵抗器9の摺動端子9cに接続され、端
子11bは電圧計切換スイッチ10により接続ノードN
1または接続ノードN2に切換えて接続される。
In the case 1a, the voltage line terminals 3 and 4 are the switches 6a and 6b of the power switch 6, the fuses 7 and 7, the connection nodes N1 and N2, the current limiting resistors 8 and 6, respectively.
8 is connected to the fixed terminals 9a and 9b of the variable resistor 9, and the overvoltage lead wire terminal 2 is connected to the sliding terminal 9c of the variable resistor 9 via the detection switch 5.
Further, the voltage measuring terminals 11a and 11b of the voltmeter 11 are connected to the recorder terminals 12 and 13, respectively, the terminal 11a is connected to the sliding terminal 9c of the variable resistor 9, and the terminal 11b is a voltmeter changeover switch. Connection node N by 10
1 or the connection node N2 is switched and connected.

【0020】しかして、図4に示した配線用遮断器38
をすべてオフし、欠相保護付ELB50のメインスイッ
チ58もオフし、過電圧検出用リード線69を中性線バ
ーから取外す。動作チェッカ1のスイッチ5,6がオフ
であり、可変抵抗器9のダイヤル9dが中間に位置して
いることを確認した後、図2に示すように、動作チェッ
カ1の端子2,3,4をリード線14,15,16によ
り欠相保護付ELB50の過電圧検出用リード線69,
負荷側電圧線用端子54,56に接続する。
The circuit breaker 38 for wiring shown in FIG.
Are all turned off, the main switch 58 of the ELB 50 with open phase protection is also turned off, and the overvoltage detection lead wire 69 is removed from the neutral wire bar. After confirming that the switches 5 and 6 of the operation checker 1 are off and the dial 9d of the variable resistor 9 is positioned in the middle, as shown in FIG. Lead wires 14, 15 and 16 for detecting the overvoltage of the ELB 50 with open phase protection 69,
It is connected to the load side voltage line terminals 54 and 56.

【0021】次いで、欠相保護付ELB50のメインス
イッチ58をオンして動作チェッカ1の端子3,4に2
00(V)の電圧を印加し、電源スイッチ6をオンす
る。このとき、可変抵抗器9のダイヤル9dを中間に位
置させているので、端子3,2間の電圧v32と端子4,
2間の電圧v42はともに100(V)となる。すなわ
ち、図3(a)に示すように、電流制限抵抗8の抵抗値
をR[たとえば、10k(Ω)である。]、可変抵抗器
9の固定端子9aと摺動端子9cの間の抵抗値をR 1
固定端子9bと摺動端子9cの間の抵抗値をR2 [ただ
し、R1 +R2 =R C は一定であり、たとえば15k
(Ω)である。]とすると、電圧v32,v42は次式
(1)(2)で表わされる。
Next, the mains of the ELB50 with phase loss protection
Switch 58 is turned on and 2 is applied to terminals 3 and 4 of operation checker 1.
Apply a voltage of 00 (V) and turn on the power switch 6.
It At this time, set the dial 9d of the variable resistor 9 to the middle position.
Since it is placed, the voltage v between terminals 3 and 232And terminal 4,
Voltage v between two42Are both 100 (V). Sanawa
Then, as shown in FIG. 3A, the resistance value of the current limiting resistor 8
Is R [for example, 10 k (Ω). ], Variable resistor
The resistance value between the fixed terminal 9a of 9 and the sliding terminal 9c is R 1,
The resistance value between the fixed terminal 9b and the sliding terminal 9c is R2[However
And R1+ R2= R CIs constant, for example, 15k
(Ω). ], The voltage v32, V42Is
It is represented by (1) and (2).

【0022】 v32=200(R+R1 )/(2R+RC ) …(1) v42=200(R+R2 )/(2R+RC ) …(2) 図3(a)の状態においては上式(1)(2)において
1 =R2 =1/2R C であるからv32=v42=100
(V)である。電圧計切換スイッチ10を交互に切換え
て電圧計11の指示値が変わらないことを確認してお
く。
V32= 200 (R + R1) / (2R + RC)… (1) v42= 200 (R + R2) / (2R + RC) (2) In the state of FIG. 3 (a), in the above equations (1) and (2)
R1= R2= 1 / 2R CTherefore v32= V42= 100
(V). Alternating voltmeter changeover switch 10
Confirm that the indicated value of the voltmeter 11 does not change.
Ku.

【0023】次いで、たとえば電圧計切換スイッチ10
を接続ノードN1側にし、図3(b)に示すように、可
変抵抗器9のダイヤル9dを徐々に回して可変抵抗器9
の固定端子9aと摺動端子9c間の抵抗値R1 を増加さ
せる。抵抗値R1 を増加させると、上式(1)(2)か
らわかるように電圧v32が増加し、電圧v42が減少す
る。そして、電圧v32が所定のしきい値vth[(たとえ
ば、130(V)。R1=13k(Ω)のときv32=1
31(V)となる。]を越えたとき、欠相保護付ELB
50が正常であれば欠相保護付ELB50が開放され、
電圧計11の指示値は0(V)となる。他のチェックも
行ない欠相保護付ELB50が正常であると判断した場
合は、リード線14,15,16を取外し、過電圧検出
用リード線69を中性線バーに取付け、欠相保護付EL
B50および配線遮断器38を復帰させて点検を終了す
る。一方、電圧v32がしきい値vthを越えても欠相保護
付ELB50が開放されない場合は欠相保護付ELB5
0は破損していると判断し、良品と交換する。また、欠
相保護付ELB50が開放されても、そのときの電圧v
32がしきい値vthを大きく越えている場合は、欠相保護
付ELB50が劣化していると判断し、良品と交換す
る。
Next, for example, the voltmeter changeover switch 10
To the connection node N1 side, and gradually turning the dial 9d of the variable resistor 9 as shown in FIG.
The resistance value R 1 between the fixed terminal 9a and the sliding terminal 9c is increased. When the resistance value R 1 is increased, the voltage v 32 increases and the voltage v 42 decreases as can be seen from the above equations (1) and (2). Then, when the voltage v 32 is a predetermined threshold value v th [(for example, 130 (V). R 1 = 13 k (Ω), v 32 = 1.
It becomes 31 (V). ], The ELB with open-phase protection
If 50 is normal, ELB50 with open phase protection is opened,
The indicated value of the voltmeter 11 becomes 0 (V). If other checks are also performed and it is determined that the ELB 50 with phase loss protection is normal, the lead wires 14, 15 and 16 are removed, the lead wire 69 for overvoltage detection is attached to the neutral wire bar, and the ELB with phase loss protection is attached.
The inspection is completed by returning B50 and the wiring breaker 38. On the other hand, if the open phase protection ELB50 does not open even when the voltage v 32 exceeds the threshold value v th , the open phase protection ELB5
0 is judged to be damaged and replaced with a good product. Even if the ELB 50 with open-phase protection is opened, the voltage v
When 32 greatly exceeds the threshold value v th , it is determined that the ELB 50 with open phase protection is deteriorated, and the ELB 50 is replaced with a good product.

【0024】なお、電圧計11として測定電圧が0
(V)になった後も測定電圧の最大値を保持する機能を
もつもの(たとえば、最大電圧を指示したまま指示針が
停止するもの)を用いれば、しきい値Vthを容易に読み
取ることができる。
As the voltmeter 11, the measured voltage is 0.
The threshold value V th can be easily read by using a device having a function of holding the maximum value of the measured voltage even after the voltage reaches (V) (for example, a device in which the pointer is stopped while indicating the maximum voltage). You can

【0025】図4はこの発明の他の実施例による欠相保
護付ELBの動作チェッカ20の構成および使用状態を
示す電気回路図である。この動作チェッカ20にあって
は、図1に示した動作チェッカ1の構成に加え、電圧V
32がしきい値vthに達してから欠相保護付ELB50が
開放されるまでの反応時間Tthを計測するためのタイマ
ー17が設けられている。また、検出スイッチ5として
2つのスイッチ5a,5bを含む連動スイッチが用いら
れており、一方のスイッチ5bは過電圧リード線用端子
2と摺動端子9cの間に接続され、他方のスイッチ5a
はタイマー17のスタート端子17a,17a間に接続
されている。また、電磁リレー18が設けられており、
そのN.C.(常時閉)スイッチ18aはタイマー17
のストップ端子17,17b間に接続され、電磁コイル
18bは接続ノードN1,N2に接続されている。
FIG. 4 is an electric circuit diagram showing the configuration and usage of an operation checker 20 of an ELB with open phase protection according to another embodiment of the present invention. In addition to the configuration of the operation checker 1 shown in FIG. 1, the operation checker 20 has a voltage V
A timer 17 is provided for measuring the reaction time T th from when 32 reaches the threshold value v th until the ELB 50 with open phase protection is opened. An interlocking switch including two switches 5a and 5b is used as the detection switch 5, one switch 5b is connected between the overvoltage lead wire terminal 2 and the sliding terminal 9c, and the other switch 5a.
Is connected between the start terminals 17a, 17a of the timer 17. Also, an electromagnetic relay 18 is provided,
The N. C. (Normally closed) Switch 18a uses timer 17
And the electromagnetic coil 18b is connected to the connection nodes N1 and N2.

【0026】しかして、上述の実施例と同様の手順で電
圧v32がしきい値vthを越えたときに欠相保護付ELB
50が開放されることを確認する。次に、タイマー17
をリセットし、検出スイッチ5をオフし、欠相保護付E
LB50のメインスイッチ58をオンする。これにより
電磁リレー18の電磁コイル18bに給電され、N.
C.スイッチ18aがオフする。次いで、検出スイッチ
5をオンすると、タイマー17のスタート端子17a,
17aが短絡されてタイマー17がスタートする。この
後、欠相保護付ELB50が開放されると、電磁リレー
18の電磁コイル18bへの給電が停止してN.C.ス
イッチ18aがオンし、タイマー17のストップ端子1
7b,17bが短絡されてタイマー17がストップす
る。タイマー17の指示値すなわち反応時間Tthが規格
内であれば点検を終了し、規格外であれば欠相保護付E
LB50が劣化したと判断し、良品と交換する。
However, when the voltage v 32 exceeds the threshold value v th by the same procedure as in the above embodiment, the ELB with open phase protection is provided.
Make sure 50 is open. Next, timer 17
Reset, turn off the detection switch 5, E
The main switch 58 of the LB 50 is turned on. As a result, power is supplied to the electromagnetic coil 18b of the electromagnetic relay 18, and the N.V.
C. The switch 18a turns off. Next, when the detection switch 5 is turned on, the start terminal 17a of the timer 17,
17a is short-circuited and the timer 17 starts. After that, when the ELB 50 with open phase protection is opened, the power supply to the electromagnetic coil 18b of the electromagnetic relay 18 is stopped and the N.P. C. The switch 18a turns on, and the stop terminal 1 of the timer 17
7b and 17b are short-circuited and the timer 17 stops. If the instruction value of the timer 17, that is, the reaction time T th, is within the standard, the inspection is ended, and if it is out of the standard, the phase loss protection E
LB50 is judged to have deteriorated and replaced with a good product.

【0027】[0027]

【発明の効果】以上のように、この発明によれば、可変
抵抗器の摺動端子および固定端子を欠相保護付ELBの
過電圧検出用リード線および負荷側電圧線用端子に接続
し、可変抵抗器の抵抗値を変えるだけで、欠相保護付E
LBの欠相保護機能をチェックすることができる。した
がって、欠相保護付ELBの欠相保護機能を現場で容易
にチェックすることができる。たとえば、定期点検時に
欠相保護機能を容易にチェックするこができ、便利であ
る。また、耐用年数を超えている欠相保護付ELBが開
放して停電した場合に中性線欠相事故が生じたのか欠相
保護付ELBが壊れたのかを容易にチェックすることが
でき、停電の原因究明を速やかに行なうことができる。
As described above, according to the present invention, the sliding terminal and the fixed terminal of the variable resistor are connected to the overvoltage detection lead wire and the load side voltage wire terminal of the ELB with open-phase protection, and the variable resistance is changed. E with phase loss protection by simply changing the resistance value of the resistor
It is possible to check the open phase protection function of the LB. Therefore, the open phase protection function of the ELB with open phase protection can be easily checked on site. For example, it is convenient because the open-phase protection function can be easily checked during periodic inspections. In addition, when the ELB with open-phase protection that has exceeded its service life is opened and a power failure occurs, it is possible to easily check whether a neutral wire open-phase accident has occurred or the ELB with open-phase protection has broken down. The cause of can be investigated promptly.

【0028】また、電流制限抵抗を設けたので、可変抵
抗器が過電流によって焼損することもない。
Further, since the current limiting resistor is provided, the variable resistor is not burned by the overcurrent.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の一実施例による欠相保護付ELBの
動作チェッカの構成および使用状態を示す電気回路図で
ある。
FIG. 1 is an electric circuit diagram showing a configuration and a usage state of an operation checker of an ELB with open phase protection according to an embodiment of the present invention.

【図2】図1に示した欠相保護付ELBの動作チェッカ
の外観および使用状態を示す正面図である。
FIG. 2 is a front view showing an appearance and a usage state of an operation checker of the ELB with open phase protection shown in FIG.

【図3】図1に示した欠相保護付ELBの動作チェッカ
の動作を説明するための電気回路図である。
3 is an electric circuit diagram for explaining an operation of an operation checker of the ELB with open phase protection shown in FIG.

【図4】この発明の他の実施例による欠相保護付ELB
の動作チェッカの構成および使用状態を示す電気回路図
である。
FIG. 4 is an ELB with open-phase protection according to another embodiment of the present invention.
3 is an electric circuit diagram showing the configuration and usage state of the operation checker of FIG.

【図5】一般住宅における単相3線式の配線図である。FIG. 5 is a wiring diagram of a single-phase three-wire system in a general house.

【図6】単相3線式の欠点を説明するための配線図であ
る。
FIG. 6 is a wiring diagram for explaining the defects of the single-phase three-wire system.

【図7】欠相保護付ELBの構成を示すブロック図であ
る。
FIG. 7 is a block diagram showing a configuration of an ELB with phase loss protection.

【図8】図7に示した欠相保護付ELBの動作を説明す
るための波形図である。
FIG. 8 is a waveform diagram for explaining the operation of the ELB with open phase protection shown in FIG. 7.

【符号の説明】[Explanation of symbols]

1 動作チェッカ 8 電流制限抵抗 9 可変抵抗器 9a,9b 固定端子 9c 摺動端子 50 欠相保護付ELB 54,56 負荷側電圧線用端子 55 負荷側中性線用端子 69 過電圧検出用リード線 L1 ,L2 電圧線 N 中性線1 Operation checker 8 Current limiting resistor 9 Variable resistor 9a, 9b Fixed terminal 9c Sliding terminal 50 ELB with open phase protection 54, 56 Load side voltage wire terminal 55 Load side neutral wire terminal 69 Overvoltage detection lead wire L 1 , L 2 voltage line N neutral line

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 負荷側中性線に接続された過電圧検出用
リード線および負荷側中性線用端子と、それぞれが負荷
側電圧線に接続された2つの負荷側電圧線用端子とを含
み、前記負荷側電圧線用端子のいずれか一方と前記過電
圧検出用リード線の間の電圧が所定電圧より大きくなっ
たときに電源側と負荷側を遮断する単相3線式用欠相保
護機能付漏電遮断器の動作チェッカにおいて、 2つの固定端子と該固定端子間の抵抗体上を移動可能に
設けられた摺動端子とを含み、前記固定端子はそれぞれ
前記負荷側電圧線用端子に接続され、前記摺動端子は前
記負荷側中性線から外された前記過電圧検出用リード線
に接続される可変抵抗器と、 前記可変抵抗器に流れる電流を制限するための電流制限
抵抗とを備えたことを特徴とする、単相3線式用欠相保
護機能付漏電遮断器の動作チェッカ。
1. An overvoltage detection lead wire and a load-side neutral wire terminal connected to the load-side neutral wire, and two load-side voltage wire terminals each connected to the load-side voltage wire. , A single-phase three-wire open-phase protection function that shuts off the power supply side and the load side when the voltage between any one of the load side voltage line terminals and the overvoltage detection lead wire exceeds a predetermined voltage. An operation checker for an earth leakage circuit breaker includes two fixed terminals and a sliding terminal movably provided on a resistor between the fixed terminals, the fixed terminals being respectively connected to the load side voltage line terminals. The sliding terminal includes a variable resistor connected to the overvoltage detection lead wire removed from the load-side neutral wire, and a current limiting resistor for limiting a current flowing through the variable resistor. Phase breakage for single-phase three-wire system characterized by Mamoru behavior checker function with earth leakage circuit breaker.
【請求項2】 前記2つの負荷側電圧線用端子のいずれ
か一方と前記負荷側中性線から外された前記過電圧検出
用リード線の間の電圧を測定するための電圧計を備えた
ことを特徴とする、請求項1に記載の単相3線式用欠相
保護機能付漏電遮断器の動作チェッカ。
2. A voltmeter for measuring a voltage between any one of the two load side voltage line terminals and the overvoltage detection lead wire removed from the load side neutral line. The operation checker for an earth leakage circuit breaker with a single-phase, three-wire system open-circuit protection function according to claim 1.
【請求項3】 前記電圧計の電圧測定用端子を前記2つ
の負荷側電圧線用端子のいずれか一方に切換えて接続す
るための切換スイッチを備えたことを特徴とする、請求
項2に記載の単相3線式用欠相保護機能付漏電遮断器の
動作チェッカ。
3. The switch according to claim 2, further comprising a changeover switch for changing over and connecting the voltage measuring terminal of the voltmeter to one of the two load side voltage line terminals. Operation checker of the earth leakage circuit breaker with the open-phase protection function for the single-phase three-wire system.
【請求項4】 前記可変抵抗器の摺動端子と前記負荷側
中性線から外された前記過電圧検出用リード線とを接続
するための検出スイッチを備えたことを特徴とする、請
求項1ないし3のいずれかに記載の単相3線式用欠相保
護機能付漏電遮断器の動作チェッカ。
4. A detection switch for connecting a sliding terminal of the variable resistor to the overvoltage detection lead wire removed from the load-side neutral wire. An operation checker for an earth leakage circuit breaker with a single-phase, three-wire type open-phase protection function according to any one of 1 to 3.
【請求項5】 前記検出スイッチをオンしてから前記単
相3線式用欠相保護機能付漏電遮断器が開放されるまで
の時間を計測するためのタイマーを備えたことを特徴と
する、請求項4に記載の単相3線式用欠相保護機能付漏
電遮断器の動作チェッカ。
5. A timer is provided for measuring the time from when the detection switch is turned on to when the earth leakage breaker with a single-phase, three-wire type open-circuit protection function is opened. An operation checker for an earth leakage circuit breaker with a single-phase, three-wire system open-phase protection function according to claim 4.
JP5259991A 1993-10-18 1993-10-18 Operation checker for earth leakage circuit breaker with open-phase protection function for single-phase three-wire system Expired - Lifetime JP2549981B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5259991A JP2549981B2 (en) 1993-10-18 1993-10-18 Operation checker for earth leakage circuit breaker with open-phase protection function for single-phase three-wire system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5259991A JP2549981B2 (en) 1993-10-18 1993-10-18 Operation checker for earth leakage circuit breaker with open-phase protection function for single-phase three-wire system

Publications (2)

Publication Number Publication Date
JPH07123580A true JPH07123580A (en) 1995-05-12
JP2549981B2 JP2549981B2 (en) 1996-10-30

Family

ID=17341774

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2549981B2 (en)

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CN102495364A (en) * 2011-12-18 2012-06-13 施耐德万高(天津)电气设备有限公司 Detection device of three-phase fuse
CN104167718A (en) * 2014-07-09 2014-11-26 山东泰开高压开关有限公司 Open-phase protective device used for breaker
CN105527566A (en) * 2016-01-07 2016-04-27 广东电网有限责任公司电力科学研究院 An experiment table for collecting signals of a high-voltage vacuum circuit breaker in opening/closing process
JP2021081398A (en) * 2019-11-22 2021-05-27 パナソニックIpマネジメント株式会社 Abnormality detection system, distribution board, abnormality detection method, and program
CN113281558A (en) * 2021-04-20 2021-08-20 国网新疆电力有限公司昌吉供电公司 Distribution network overvoltage detection alarm device

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JP2006126037A (en) * 2004-10-29 2006-05-18 Chugoku Electric Power Co Inc:The Fuse clip with voltmeter
JP4632747B2 (en) * 2004-10-29 2011-02-16 中国電力株式会社 Fuse clip with voltmeter
CN102288908A (en) * 2011-07-22 2011-12-21 重庆大学 Fault monitoring device and fault judgment method for measurement potential transformer (PT) fuse
CN102495364A (en) * 2011-12-18 2012-06-13 施耐德万高(天津)电气设备有限公司 Detection device of three-phase fuse
CN104167718A (en) * 2014-07-09 2014-11-26 山东泰开高压开关有限公司 Open-phase protective device used for breaker
CN105527566A (en) * 2016-01-07 2016-04-27 广东电网有限责任公司电力科学研究院 An experiment table for collecting signals of a high-voltage vacuum circuit breaker in opening/closing process
JP2021081398A (en) * 2019-11-22 2021-05-27 パナソニックIpマネジメント株式会社 Abnormality detection system, distribution board, abnormality detection method, and program
CN113281558A (en) * 2021-04-20 2021-08-20 国网新疆电力有限公司昌吉供电公司 Distribution network overvoltage detection alarm device
CN113281558B (en) * 2021-04-20 2023-09-05 国网新疆电力有限公司昌吉供电公司 Overvoltage detection alarm device for power distribution network

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