JPS63236238A - Fuse disconnection detector - Google Patents
Fuse disconnection detectorInfo
- Publication number
- JPS63236238A JPS63236238A JP6897087A JP6897087A JPS63236238A JP S63236238 A JPS63236238 A JP S63236238A JP 6897087 A JP6897087 A JP 6897087A JP 6897087 A JP6897087 A JP 6897087A JP S63236238 A JPS63236238 A JP S63236238A
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- power supply
- magnetic permeability
- state
- power
- 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.)
- Pending
Links
- 230000035699 permeability Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 13
- 230000004907 flux Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Fuses (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、並列接続回線を介して負荷への電力の並行供
給を行う電力供給装置に用いて好適なヒユーズ断線検出
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuse breakage detection device suitable for use in a power supply device that supplies power in parallel to a load via parallel connection lines.
従来より、大電力配線網等においては、その安全対策上
から、負荷への電力の供給を複数の系統に分けて行って
いる。すなわち、電力供給回線を複数並列に接続するこ
とにより、負荷への電力の並行供給を行っている。各電
力供給回線には、過電流に対するヒユーズが付設されて
おり、全ての回線のヒユーズが溶断しない限り、負荷へ
の電力の供給が継続されるようになっている。BACKGROUND ART Conventionally, in a large power distribution network, power is supplied to a load by dividing it into a plurality of systems for safety reasons. That is, by connecting a plurality of power supply lines in parallel, power is supplied to the load in parallel. Each power supply line is equipped with a fuse to prevent overcurrent, and the supply of power to the load is continued as long as the fuses of all lines are not blown.
しかしながらこのような従来の電力供給装置によると、
ヒユーズの溶断事故が生じたとしても、他の正常な回線
を経由して負荷への電力の供給が行われるため、その溶
断事故の発生を知ることができず、ましてやその溶断事
故がどの電力供給回線で生じたのか知ることさえできな
かった。このため、ヒユーズが溶断されたままで放置さ
れる場合が多く、この溶断ヒユーズの放置が重なった場
合、負荷への電力の供給がストップしてしまうという最
悪の状況に陥る虞れがあった。However, according to such conventional power supply devices,
Even if a fuse blows, power is supplied to the load via another normal line, so it is impossible to know that the fuse has blown, and even more so, it is impossible to know which power supply the fuse has blown. I couldn't even tell if it happened on the line. For this reason, fuses are often left blown, and if these blown fuses are left unattended, there is a risk that the supply of power to the load will stop, resulting in the worst situation.
尚、溶断検出器付のヒユーズとして、ヒユーズ線により
検出用接点を開状態にセットしておき、ヒユーズ線の断
線によりこの検出周接・点を閉状態とするように構成し
たヒユーズがある。しかし、このヒユーズは、検出用接
点がオープンタイプであるため、その接点の表面酸化等
により動作が不確実になり易いという問題がある。また
、このヒユーズは比較的小電流タイプしか製作されてい
ないので、上述した大電力配線網等の電力供給回線へは
適用することができない。Incidentally, as a fuse with a blowout detector, there is a fuse configured such that a detection contact is set in an open state by a fuse wire, and the detection contact/point is set in a closed state when the fuse wire is broken. However, since the detection contact of this fuse is of an open type, there is a problem in that the operation tends to become uncertain due to surface oxidation of the contact. Further, since this fuse is manufactured only as a relatively low current type, it cannot be applied to power supply lines such as the above-mentioned high power distribution network.
本発明はこのような問題点に鑑みてなされたもので、ヒ
ユーズを付設してなる回線に流れる電流の作る起磁力に
よって低透磁率状態に変化する透磁率変化手段の高透磁
率状態への変化に基づいて、前記ヒユーズの断線検出を
行うようにしたものである。The present invention has been made in view of the above-mentioned problems, and includes a method for changing a magnetic permeability changing means, which changes from a low magnetic permeability state to a high magnetic permeability state, by a magnetomotive force created by a current flowing through a line provided with a fuse. Based on this, the disconnection of the fuse is detected.
したがってこの発明によれば、透磁率変化手段の高透磁
率状態への変化に基づいて、付設されたヒユーズの断線
検出が非接触で可能となる。Therefore, according to the present invention, it is possible to detect disconnection of the attached fuse without contact based on the change of the magnetic permeability changing means to the high magnetic permeability state.
以下、本発明に係るヒユーズ断線検出装置を詳細に説明
する。図は、このヒユーズ断線検出装置の一実施例を示
す回路構成図である。同図において、１は負荷への電力
供給回線、２はこの電力供給回線１に付設されたヒユー
ズ、３は電力供給回線１を押通して非接触に配置された
環状鉄心、４はこの環状鉄心３に巻回されたコイルであ
り、環状鉄心３とコイル４とで検出器用変圧器が構成さ
れている。５は交流電源、６はコンパレータ、７は警報
表示器である。コンパレータ６の非反転入力端には、コ
イル４と抵抗８との接続点に生ずる電圧が、ＤＣ変換回
路９において直流値に変換されて入力されるようになっ
ており、その反転入力端には抵抗１０と抵抗１１との接
続点に生ずる電圧が、ＤＣ変換回路１２において直流値
に変換されて入力されるようになっている。尚、コイル
４および抵抗１１の他端は接地されており、交流型′ｔ
ｉ、５に対して、抵抗８とコイル４との直列回路および
抵抗１０と抵抗１１との直列回路が並列に接続されてい
る。また、本実施例においては、交流電源５の出力周波
数を１２０Ｈｚとしており、警報表示器７はコンパレー
タ６のｒＨＪレベルの比較出力によって点灯するように
なっている。Hereinafter, the fuse breakage detection device according to the present invention will be explained in detail. The figure is a circuit configuration diagram showing an embodiment of this fuse breakage detection device. In the figure, 1 is a power supply line to the load, 2 is a fuse attached to this power supply line 1, 3 is an annular core pushed through the power supply line 1 and placed in a non-contact manner, and 4 is this annular core. The annular core 3 and the coil 4 constitute a detector transformer. 5 is an AC power supply, 6 is a comparator, and 7 is an alarm indicator. The voltage generated at the connection point between the coil 4 and the resistor 8 is converted into a DC value by the DC conversion circuit 9 and inputted to the non-inverting input terminal of the comparator 6. The voltage generated at the connection point between the resistor 10 and the resistor 11 is converted into a DC value by a DC conversion circuit 12 and inputted. Note that the other ends of the coil 4 and the resistor 11 are grounded, and the AC type 't
A series circuit of a resistor 8 and a coil 4 and a series circuit of a resistor 10 and a resistor 11 are connected in parallel to i and 5. In this embodiment, the output frequency of the AC power source 5 is 120 Hz, and the alarm indicator 7 is turned on by the comparison output of the rHJ level from the comparator 6.
次に、このように構成されたヒユーズ断線検出装置の動
作を説明する。今、電力供給回線１に負荷への供給電流
（負荷電流）が流れているものとする。この時、環状鉄
心３は低透磁率状態にある。Next, the operation of the fuse breakage detection device configured as described above will be explained. It is now assumed that a supply current to a load (load current) is flowing through the power supply line 1. At this time, the annular core 3 is in a low magnetic permeability state.
すなわち、電力供給回線１に流れる負荷電流の作る起磁
力によって、環状鉄心３における磁束密度が増大し、こ
の磁束密度がＢ−Ｈ特性のヒステリシス環線の飽和域近
くまで変化することにより、環状鉄心３が低透磁率状態
となる。このため、環状鉄心３に巻回されたコイル４が
低インピーダンス状態となり、このコイル４と抵抗８と
の接続点に生ずる電圧、即ちコンパレータ６の非反転入
力端に入力される電圧が低電圧値となる（本実施例にお
いては約０．５Ｖとなる）。このとき、コンパレータ６
の比較出力を「Ｌ」レベルとするべく、その反転入力端
へのＤＣ変換回路１２を介する入力電圧の設定がなされ
ている。すなわち、抵抗１０と抵抗１１との分圧比の設
定によって、コンパレータ６の反転入力端への入力電圧
値を、その非反転入力端への入力電圧値よりもやや高く
設定している。本実施例においては、この非反転入力端
への入力電圧値を約０．７ボルトとしており、したがっ
て電力供給回線１に負荷電流が流れている間は、警報表
示器７が消灯状態を維持する。That is, the magnetic flux density in the annular core 3 increases due to the magnetomotive force generated by the load current flowing through the power supply line 1, and as this magnetic flux density changes to near the saturation region of the hysteresis ring wire of the B-H characteristic, the annular core 3 increases. becomes a low permeability state. Therefore, the coil 4 wound around the annular core 3 becomes in a low impedance state, and the voltage generated at the connection point between the coil 4 and the resistor 8, that is, the voltage input to the non-inverting input terminal of the comparator 6, becomes a low voltage value. (approximately 0.5V in this example). At this time, comparator 6
The input voltage to the inverting input terminal via the DC converter circuit 12 is set in order to set the comparison output to the "L" level. That is, by setting the voltage division ratio between the resistors 10 and 11, the input voltage value to the inverting input terminal of the comparator 6 is set to be slightly higher than the input voltage value to the non-inverting input terminal thereof. In this embodiment, the input voltage value to this non-inverting input terminal is approximately 0.7 volts, and therefore, while the load current is flowing through the power supply line 1, the alarm indicator 7 remains off. .
このような状態から今、電力供給回線１においてヒユー
ズ２が溶断したとする。これにより、電力供給回線１を
流れる負荷電流は遮断され、この負荷電流の作る起磁力
が消失するため、環状鉄心３の磁束密度は減少し、Ｂ−
Ｈヒステリシス環線のレマネンス（保磁力）状態まで変
化する。すなわち、この磁束密度の減少により、環状鉄
心３が高透磁率状態となる。これにより、環状鉄心３に
巻回されたコイル４が高インピーダンス状態となり、コ
ンパレータ６の非反転入力端に入力される電圧値が高く
なる（本実施例においては、約１■となる）。この非反
転入力端への入力電圧値の上昇により、コンパレータ６
の比較出力がｒＨＪレベルとなって、警報表示器７が点
灯するようになり、この警報表示器７の点灯によりヒユ
ーズ２の溶断が視認されることになる。Suppose now that the fuse 2 in the power supply line 1 blows out in such a state. As a result, the load current flowing through the power supply line 1 is cut off, and the magnetomotive force generated by this load current disappears, so the magnetic flux density of the annular iron core 3 decreases, and B-
It changes to the remanence (coercive force) state of the H hysteresis ring. That is, due to this decrease in magnetic flux density, the annular iron core 3 enters a state of high magnetic permeability. As a result, the coil 4 wound around the annular core 3 enters a high impedance state, and the voltage value input to the non-inverting input terminal of the comparator 6 becomes high (approximately 1<1> in this embodiment). Due to this increase in the input voltage value to the non-inverting input terminal, the comparator 6
The comparison output becomes rHJ level, and the alarm indicator 7 lights up, and the lighting of the alarm indicator 7 makes it visible that the fuse 2 is blown.
したがって、電力の並行供給を行う電力供給装置におい
て、並列に接続された各電力供給回線にこのヒユーズ断
線検出装置を設置すれば、各電力供給回線におけるヒユ
ーズの溶断の有無を非接触で、簡単に、しかも確実に検
出することができるようになり、溶断ヒユーズの早期交
換によって、負荷への電力の安全供給が図られる。Therefore, in a power supply device that supplies power in parallel, if this fuse blowout detection device is installed on each power supply line connected in parallel, it is possible to easily detect whether or not the fuse in each power supply line is blown without contact. Moreover, it is now possible to reliably detect the blown fuse, and by quickly replacing the blown fuse, the safe supply of power to the load can be achieved.
尚、環状鉄心３の材料としては、ケイ素鋼板やフェライ
ト等の磁性材料が適用可能であり、このヒユーズ断線検
出装置を、電力の並行供給を行わない単独回線に適用し
てもよいことは言うまでもない。It should be noted that magnetic materials such as silicon steel plates and ferrite can be used as the material for the annular core 3, and it goes without saying that this fuse breakage detection device may be applied to a single line where power is not supplied in parallel. .
以上説明したように本発明によるヒユーズ断線検出装置
によると、ヒユーズを付設してなる回線に流れる電流の
作る起磁力によって低透磁率状態に変化する透磁率変化
手段の高透磁率状態への変化に基づいて、前記ヒユーズ
の断線検出を行うようにしので、並列接続回線を介して
負荷への電力の並行供給を行う電力供給装置において、
各回線に付設されたヒユーズの断線検出を、非接触で簡
単且つ確実に行うことが可能となる。As explained above, according to the fuse breakage detection device according to the present invention, the magnetic permeability changing means changes from the low magnetic permeability state to the high magnetic permeability state due to the magnetomotive force generated by the current flowing through the line provided with the fuse. Based on this, in a power supply device that supplies power in parallel to a load via a parallel connection line, the fuse disconnection is detected.
It becomes possible to easily and reliably detect disconnection of fuses attached to each line without contact.
図は本発明に係るヒユーズ断線検出装置の一実施例を示
す回路構成図である。
１・・・電力供給回線、２・・・ヒユーズ、３・・・環
状鉄心、４・・・コイル、５・・・交流電源、６・・・
コンパレータ、７・・・警報表示器、８，１０．１１・
・・抵抗。The figure is a circuit configuration diagram showing an embodiment of a fuse breakage detection device according to the present invention. DESCRIPTION OF SYMBOLS 1... Power supply line, 2... Fuse, 3... Annular iron core, 4... Coil, 5... AC power supply, 6...
Comparator, 7... Alarm indicator, 8, 10.11.
··resistance.
Claims (1)
によって低透磁率状態に変化する透磁率変化手段と、こ
の透磁率変化手段の高透磁率状態への変化に基づいて前
記ヒューズの断線を検出するヒューズ断線検出手段とを
備えてなるヒューズ断線検出装置。A magnetic permeability changing means changes to a low magnetic permeability state by a magnetomotive force generated by a current flowing through a line provided with a fuse, and disconnection of the fuse is detected based on the change of the magnetic permeability changing means to a high magnetic permeability state. A fuse disconnection detection device comprising fuse disconnection detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6897087A JPS63236238A (en) | 1987-03-25 | 1987-03-25 | Fuse disconnection detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6897087A JPS63236238A (en) | 1987-03-25 | 1987-03-25 | Fuse disconnection detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63236238A true JPS63236238A (en) | 1988-10-03 |
Family
ID=13389037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6897087A Pending JPS63236238A (en) | 1987-03-25 | 1987-03-25 | Fuse disconnection detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63236238A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144189A (en) * | 2017-06-29 | 2017-09-08 | 中国工程物理研究院电子工程研究所 | It is a kind of can safe on-line checking in-line arrangement fuse |
-
1987
- 1987-03-25 JP JP6897087A patent/JPS63236238A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144189A (en) * | 2017-06-29 | 2017-09-08 | 中国工程物理研究院电子工程研究所 | It is a kind of can safe on-line checking in-line arrangement fuse |
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