JP2558167B2 - ELB checker with residual current compensation - Google Patents
ELB checker with residual current compensationInfo
- Publication number
- JP2558167B2 JP2558167B2 JP1302243A JP30224389A JP2558167B2 JP 2558167 B2 JP2558167 B2 JP 2558167B2 JP 1302243 A JP1302243 A JP 1302243A JP 30224389 A JP30224389 A JP 30224389A JP 2558167 B2 JP2558167 B2 JP 2558167B2
- Authority
- JP
- Japan
- Prior art keywords
- winding
- current
- earth leakage
- power supply
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、ELBと呼ばれる漏電遮断器等の動作試験
などを行なうELBチェッカーに関するものである。Description: TECHNICAL FIELD The present invention relates to an ELB checker that performs an operation test of an earth leakage breaker called an ELB.
（従来の技術） 従来のこの種の装置は、基本的には適宜の可変電源か
らの電流を、テスト電流として単に漏電遮断器の電源側
から入力させ、負荷側から出力させて、最小動作試験や
動作限時試験等必要な試験を行なうものであった。そし
てかかる試験を実施する際は必ずケーブルを切り離して
から行なっている。(Prior Art) In the conventional device of this type, basically, an electric current from an appropriate variable power source is simply input as a test current from the power source side of the earth leakage breaker and output from the load side to perform a minimum operation test. And necessary tests such as a motion time delay test. When conducting such a test, be sure to disconnect the cable.
何故なら、漏電遮断器にケーブルを接続した状態で
は、ケーブルの大地静電容量による充電によって漏電遮
断器内に若干の大地電流が流れるため、試験時には上記
テスト電流に当該大地電流も加わってしまい、漏電遮断
器の所定の動作値にて試験をすることができないからで
ある。Because, in the state where the cable is connected to the earth leakage breaker, some earth current flows in the earth leakage breaker due to charging by the earth capacitance of the cable, so the earth current is also added to the above test current during the test. This is because the test cannot be performed with a predetermined operating value of the earth leakage breaker.
（発明が解決しようとする課題） しかしながらそのように点検の都度いちいちケーブル
を切り離し、終了後に再び接続するのは、いかにも面倒
であり時間がかかってしまう。しかもケーブルの切離
し、接続作業自体も煩雑であり、そのうえ危険である。(Problems to be solved by the invention) However, it is very troublesome and time-consuming to disconnect the cable each time an inspection is performed and reconnect it after the inspection. Moreover, the disconnection of the cables and the connecting work itself are complicated and dangerous.
（課題を解決するための手段） この発明はかかる点に鑑みてなされたものであり、大
地電流のような残留電流を補償することによって正しい
動作値を把握する構成を持たせて、試験の際にケーブル
の切離し作業を不用とする、ELBチェッカーを提供する
ものである。(Means for Solving the Problem) The present invention has been made in view of the above point, and has a configuration in which a correct operation value is grasped by compensating a residual current such as a ground current, and a It provides an ELB checker that eliminates the work of disconnecting the cable.
これを具体化する手段として請求項（１）項の発明
は、適宜の可変電源から対象漏電遮断器の電源側端子に
接続してテスト電流を流し、当該遮断器の負荷側端子と
接続してこのテスト電流を取り出すテスト電流回路を設
け、この回路の上記可変電流と負荷側端子との間に三巻
線CTを設け、この三巻線CTの一次巻線にテスト電流を流
し、上記漏電遮断器に接続した負荷側の電流路にグリッ
プ型絶縁変成器を着脱自在に取り付けてこの変成器で取
り出した大地電流を上記三巻線CTの二次巻線にかけ、当
該三巻線CTの三次巻線から上記対象漏電遮断器の動作電
流を取り出しす構成としたものである。As a means for embodying this, the invention of claim (1) connects the power source side terminal of the target earth leakage circuit breaker with an appropriate variable power source to pass a test current, and connects it with the load side terminal of the circuit breaker. A test current circuit that extracts this test current is provided, and a three-winding CT is provided between the variable current of this circuit and the load side terminal, and the test current is passed through the primary winding of this three-winding CT to cut off the leakage current. A grip type insulation transformer is detachably attached to the current path on the load side connected to the transformer, and the ground current extracted by this transformer is applied to the secondary winding of the three-winding CT, and the third winding of the three-winding CT is wound. The operating current of the target earth leakage breaker is extracted from the line.
また請求項（２）項の発明は、適宜の可変電源を有す
るテスト電流回路を設け、その一端を対象漏電遮断器の
電源側端子に接続し、他単を負荷側端子に接続する構成
とし、このテスト電流回路の上記可変電源と負荷側接続
端子との間に、三巻線CTの一次巻線を設け、この三巻線
CTの二次巻線は上記漏電遮断器に接続した負荷側の電線
路に着脱自在なグリップ型絶縁変成器と接続され、三次
巻線は測定用電流計を接続したものである。The invention of claim (2) is provided with a test current circuit having an appropriate variable power supply, one end of which is connected to the power supply side terminal of the target earth leakage breaker, and the other is connected to the load side terminal, The primary winding of the three-winding CT is provided between the variable power supply and the load-side connection terminal of this test current circuit.
The secondary winding of the CT is connected to a detachable grip type insulation transformer on the load side electric line connected to the earth leakage breaker, and the tertiary winding is connected to a measuring ammeter.
（作 用） 動作試験等に当たっては本件チェッカーの上記テスト
電流回路の可変電源の出力側を対象漏電遮断器の電源側
の端子に接続し、また上記の可変電源の入力側を対象漏
電遮断器の負荷側の端子に接続し、さらに当該漏電遮断
器に接続した負荷側の電線路にグリップ絶縁変成器を着
脱自在に取り付けるものである。(Operation) In the operation test, etc., connect the output side of the variable power supply of the test current circuit of the Checker to the power supply side terminal of the target earth leakage breaker, and connect the input side of the variable power supply to the target earth leakage breaker. The grip insulation transformer is detachably attached to the load side electric line connected to the load side terminal and further connected to the earth leakage breaker.
そして上記テスト電流回路にテスト電流を流し、負荷
側端子で取り出したテスト電流と、グリップ型絶縁変成
器で取り出した大地電流とのベクトル和が三巻線CTによ
って出力されることになり、対象漏電遮断器の動作値が
直接測定用電流計に表示され、正しく把握できる。従っ
て、残留電流分がいわば補償された形で動作値を把握で
きるものであるから、漏電遮断器の動作試験等をするに
あたり、ケーブルを切り離す必要がないのである。Then, the test current is passed through the test current circuit, and the vector sum of the test current extracted at the load side terminal and the ground current extracted by the grip type insulation transformer is output by the three-winding CT. The operating value of the breaker is displayed directly on the ammeter for measurement, so that it can be grasped correctly. Therefore, since the operation value can be grasped in a form in which the residual current is compensated for, it is not necessary to disconnect the cable when performing an operation test of the earth leakage breaker.
（実施例） 以下、この発明の実施例を図について説明する。(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図に示したように適宜の可変交流電源１を有する
テスト電流回路２を設け、その一端を対象漏電遮断切３
の電源側端子3aに接続し、他端を負荷側端子3bに接続す
る構成とし、このテスト電流回路２の上記可変交流電流
１と負荷側接続端子3bとの間に、三巻線CT4を設け、こ
の三巻線CT4の一次側に上記テスト電流回路２に設けた
一次巻線4aを設ける。この三巻線CT4の二次側には二つ
の巻線を設け、一方の二次巻線4bは上記漏電遮断器３に
接続した負荷側の電流路を着段自在なグリップ型絶縁変
成器５と接続され、他方の三次巻線4cと測定用電流計
（Ao）を接続した。そして第１図における点線で囲まれ
た部分がこの発明のELBチェッカーとなる。As shown in FIG. 1, a test current circuit 2 having an appropriate variable AC power source 1 is provided, and one end of the test current circuit 2 is a target earth leakage cutoff 3
Is connected to the power supply side terminal 3a and the other end is connected to the load side terminal 3b, and a three-winding CT4 is provided between the variable AC current 1 of the test current circuit 2 and the load side connection terminal 3b. The primary winding 4a provided in the test current circuit 2 is provided on the primary side of the three-winding CT4. Two windings are provided on the secondary side of this three-winding CT4, and one secondary winding 4b is a grip type insulation transformer 5 in which the current path on the load side connected to the earth leakage breaker 3 can be stepped. And the other tertiary winding 4c and the measuring ammeter (Ao) were connected. The part surrounded by the dotted line in FIG. 1 is the ELB checker of the present invention.
そして上記可変交流電源１の出力側を当該遮断器３の
電源側端子3aと接続し、また入力側を負荷側端子3bと接
続して対象漏電遮断器３にテスト電流を流す。これによ
り三巻線CT4の一次側にテスト電流が流れる。また上記
電遮断器３に接続した負荷側の電線路にグリップ型絶縁
変成器５を取付けると、上記三巻線CT4の二次巻線4bに
大地電流が流れて当該三巻線CT4の三次巻線4cからこれ
を取り出し上記対象漏電遮断器３の動作電流が上記測定
用電流計（Ao）に表示される。Then, the output side of the variable AC power source 1 is connected to the power source side terminal 3a of the circuit breaker 3 and the input side is connected to the load side terminal 3b to flow a test current through the target earth leakage breaker 3. This causes a test current to flow on the primary side of the three-winding CT4. When the grip type insulation transformer 5 is attached to the load side electric line connected to the electric circuit breaker 3, a ground current flows in the secondary winding 4b of the three-winding CT4, and the tertiary winding of the three-winding CT4. This is taken out from the line 4c, and the operating current of the target earth leakage breaker 3 is displayed on the measuring ammeter (Ao).
この様に可変交流電流１から漏電遮断器３に通電され
るテスト電流itと、グリップ型絶縁変成器５によって検
出された残留電流たる大地電流igとを三巻線CT4によっ
て合成するようにしたものである。And such variable alternating test current from the current 1 is energized earth leakage breaker 3 i t, the detected serving residual current ground current i g by grip isolation transformer 5 to synthesize by the three winding CT4 It was done.
この様にこの実施例によれば、可変交流電源１から流
された電流であるテスト電流itと大地電流igとのベクト
ル和が三巻線CT4によって出力されることになり、漏電
遮断器３の動作値が直接表示され、それ故正しく把握で
きるものである。As described above, according to this embodiment, the vector sum of the test current i t and the ground current i g , which are the currents supplied from the variable AC power supply 1, is output by the three-winding CT4, and the earth leakage breaker is provided. The operation value of 3 is directly displayed, and therefore can be correctly grasped.
（発明の効果） この発明によれば、請求項（１）項及び（２）項のい
ずれによっても、残留電流が補償された形で検査対象と
なる漏電遮断器の実際の動作値が正しく把握できるか
ら、動作試験等のチェックをするにあたり、ケーブルを
切り離す必要がないものである。(Effects of the Invention) According to the present invention, the actual operating value of the earth leakage breaker to be inspected is accurately grasped in a form in which the residual current is compensated, according to any of claims (1) and (2). Therefore, it is not necessary to disconnect the cable to check the operation test.
従って漏電遮断器の各種試験が迅速に行なえ、しかも
作業の安全性も確保できるものである。Therefore, various tests of the earth leakage breaker can be carried out quickly and the safety of work can be secured.
第１図は三巻線CTを用いた残留電流補償型ELBチェッカ
ーの要部説明図である。 なお図中、１は可変交流電源、２はテスト電流回路、３
は漏電遮断器、４は三巻線CT、５はグリップ型絶縁変成
器である。FIG. 1 is an explanatory view of a main part of a residual current compensation type ELB checker using a three-winding CT. In the figure, 1 is a variable AC power supply, 2 is a test current circuit, 3
Is an earth leakage breaker, 4 is a three-winding CT, and 5 is a grip type insulation transformer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 上原 要蔵 東京都北区岸町１丁目８番17号 恒栄電 設株式会社内 (72)発明者 伊藤 淳夫 東京都中央区新富１丁目15番３号 向陽 電気株式会社内 (56)参考文献 特開 昭52−1475（ＪＰ，Ａ) 特開 昭52−41875（ＪＰ，Ａ) 「最近のしゃ断器と応用技術」Ｐ. 175，Ｐ．183電気書院昭和49年１月10日 発行 「新電気シリーズ電力ヒューズ・低圧 しゃ断器の現場技術」Ｐ．125〜127オー ム社昭和52年10月20日発行 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kozo Uehara 1-8-17, Kishimachi, Kita-ku, Tokyo Within Koei Densho Co., Ltd. No. 3 in Koyo Electric Co., Ltd. (56) Reference JP-A-52-1475 (JP, A) JP-A-52-41875 (JP, A) "Recent Circuit Breaker and Applied Technology" P. 175, P. 183 Denki Shoin, published on January 10, 1974, "Shindenki series power fuse / low-voltage circuit breaker field technology" 125-127 Ohmsha issued October 20, 1977
Claims (2)
側端子に接続してテスト電流を流し、当該遮断器の負荷
側端子と接続してこのテスト電流を取り出すテスト電流
回路を設け、この回路の上記可変電源と負荷側端子との
間に三巻線CTを設け、この三巻線CTの一次巻線にテスト
電流を流し、上記漏電遮断器に接続した負荷側の電流路
にグリップ型絶縁変成器を着脱自在に取り付けてこの変
成器で取り出した大地電流を上記三巻線CTの二次巻線に
かけ、当該三巻線CTの三次巻線から上記対象漏電遮断器
の動作電流を取り出す構成としたことを特徴とする、残
留電流補償型ELBチェッカー。1. A test current circuit is provided, which is connected to a power supply side terminal of a target earth leakage circuit breaker to flow a test current from an appropriate variable power source and which is connected to a load side terminal of the circuit breaker to take out the test current. A three-winding CT is provided between the variable power supply and the load-side terminal of the circuit, a test current is passed through the primary winding of the three-winding CT, and a grip type is connected to the load-side current path connected to the earth leakage breaker. Attach an insulation transformer detachably, apply the ground current extracted by this transformer to the secondary winding of the three-winding CT, and extract the operating current of the target earth leakage breaker from the tertiary winding of the three-winding CT. ELB checker with residual current compensation, which is characterized by being configured.
設け、その一端を対象漏電遮断器の電源側端子に接続
し、他端を負荷側端子に接続する構成とし、このテスト
電流回路の上記可変電源と負荷側接続端子との間に、三
巻線CTの一次巻線を設け、この三巻線CTの二次巻線は上
記漏電遮断器に接続した負荷側の電線路に着脱自在なグ
リップ型絶縁変成器と接続され、三次巻線は測定用電流
計を接続したことを特徴とする、残留電流補償型ELBチ
ェッカー。2. A test current circuit having an appropriate variable power supply is provided, one end of which is connected to the power supply side terminal of the target earth leakage breaker and the other end is connected to the load side terminal. A primary winding of the three-winding CT is provided between the variable power supply and the connection terminal on the load side, and the secondary winding of this three-winding CT is detachable from the load-side electric line connected to the earth leakage breaker. ELB checker with residual current compensation, which is connected to a grip type insulation transformer, and a tertiary winding is connected to an ammeter for measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1302243A JP2558167B2 (en) | 1989-11-22 | 1989-11-22 | ELB checker with residual current compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1302243A JP2558167B2 (en) | 1989-11-22 | 1989-11-22 | ELB checker with residual current compensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03163374A JPH03163374A (en) | 1991-07-15 |
| JP2558167B2 true JP2558167B2 (en) | 1996-11-27 |
Family
ID=17906676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1302243A Expired - Lifetime JP2558167B2 (en) | 1989-11-22 | 1989-11-22 | ELB checker with residual current compensation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2558167B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374964A (en) * | 2014-11-05 | 2015-02-25 | 江苏省电力公司常州供电公司 | Electric energy meter capable of measuring residual currents |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5843702B2 (en) * | 1975-06-23 | 1983-09-28 | 松下電工株式会社 | Rodenshadankinoshikensouchi |
| JPS5241875A (en) * | 1975-09-30 | 1977-03-31 | Yokogawa Electric Works Ltd | Checker for leakage breaker |
-
1989
- 1989-11-22 JP JP1302243A patent/JP2558167B2/en not_active Expired - Lifetime
Non-Patent Citations (2)
| Title |
|---|
| 「新電気シリーズ電力ヒューズ・低圧しゃ断器の現場技術」Ｐ．１２５〜１２７オーム社昭和５２年１０月２０日発行 |
| 「最近のしゃ断器と応用技術」Ｐ．１７５，Ｐ．１８３電気書院昭和４９年１月１０日発行 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374964A (en) * | 2014-11-05 | 2015-02-25 | 江苏省电力公司常州供电公司 | Electric energy meter capable of measuring residual currents |
| CN104374964B (en) * | 2014-11-05 | 2017-07-18 | 江苏省电力公司常州供电公司 | The electric energy meter of measurable residual current |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03163374A (en) | 1991-07-15 |
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