JPS58200172A - Detection of insulation defect - Google Patents
Detection of insulation defectInfo
- Publication number
- JPS58200172A JPS58200172A JP57083735A JP8373582A JPS58200172A JP S58200172 A JPS58200172 A JP S58200172A JP 57083735 A JP57083735 A JP 57083735A JP 8373582 A JP8373582 A JP 8373582A JP S58200172 A JPS58200172 A JP S58200172A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- power source
- insulation
- output
- high frequency
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Abstract
Description
【発明の詳細な説明】
この発明は、クレーン岬で使用されるり７テイングマグ
ネツト尋のインダクタンス負荷に電流を供給するケーブ
ルの絶縁不簀を検出する絶縁不良検出方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insulation failure detection method for detecting insulation failure in a cable that supplies current to an inductance load of about 70 mm, which is used at Cape Crane.
第７図は、クレーン等で使用されるリフティングマグネ
ットＣ以下、リフマグと略称する）の電流供給装置の構
成を示す図であ夛、１は電源制御盤、２ａ＊２ｂは電源
制御盤ＩＫ設けられた直流電源出力端子である。出力端
子２ｍ、２ｂは、ケプル３、ケーブル巻込用ドラム４に
巻回されたケーブル５、コネクＩ６を介してリフマグ７
のコイルに接続されている。また、これらの構成簀素の
うち、電源制御盤１、ケーブル３、ドラム４はクレーン
本体上に設置葛れておシ、ケーブル５、コネクタ６、リ
フマグ７はクレーンよシ吊如下けられている。このよう
な構Ｉｆｔにおいて電源制御盤ｌから出力された直流電
流は、ケーブル３と５、コネクタ６を介してリフマグ７
へ供給され、このリフマグ７を励磁する。また、リフマ
グ７は物品管においては、ケーブル５にネジレ中引張ル
応力か加えられ、この丸め、ケーブル５が損傷すること
が多い この場合、通常ケーブル５に！！Ｉ１間短絡全
短絡させ、リフマグ７を励磁している直流電流が切れ、
物品を搬送中であれ＃：Ｌ′吊シ浩し、下で作業してｉ
る人間や機械に大きな損傷を与える。このような事故を
防止するには、ケーブル５を定期的に交換し、ケーブル
３．６の一関絶縁抵抗を定期的に測定し、ケープ、ル３
．５の状態を把握する必要がある。Figure 7 is a diagram showing the configuration of a current supply device for a lifting magnet C (hereinafter referred to as Lifmag) used in cranes, etc. 1 is a power control panel, 2a * 2b is a power control panel IK. This is a DC power output terminal. The output terminals 2m and 2b are connected to the refmag 7 via the cable 5, which is wound around the cable winding drum 4, and the connector I6.
connected to the coil. Of these components, the power control panel 1, cable 3, and drum 4 are installed on the crane body, and the cable 5, connector 6, and lift mag 7 are suspended from the crane. . In such a configuration Ift, the DC current output from the power supply control panel l is sent to the refmag 7 via the cables 3 and 5 and the connector 6.
is supplied to the riff mag 7 to excite it. In addition, when the RIFMAG 7 is used as a product pipe, tensile stress is applied to the cable 5 during twisting, and this rounding often causes damage to the cable 5. In this case, the cable 5 is usually damaged! ! The short circuit between I1 causes a complete short circuit, and the DC current that excites the riff mag 7 is cut off.
If the item is being transported, lift it up and work below it.
cause severe damage to people and machinery. To prevent such accidents, replace the cable 5 regularly, measure the insulation resistance of the cable 3.6 regularly, and
．． It is necessary to understand the status of 5.
しかしながら、上述のケーブル３．５の線間絶縁抵抗の
定期点検においては、次のような欠点があった。However, the periodic inspection of the inter-line insulation resistance of the cable 3.5 described above had the following drawbacks.
■ 直流を電源として用いている通常の絶縁抵抗計で測
定する場合、リフマグ７のコイル抵抗は絶縁抵抗に比較
して極めて小さいので、リフマグ７をケーブル５からそ
の都度はずして測定しなければならない。そのため、人
員と時間がかかシ、月に７（ロ）程度測定しているだけ
である。■ When measuring with a normal insulation resistance tester that uses DC as a power source, the coil resistance of the RIFMag 7 is extremely small compared to the insulation resistance, so the RIFMag 7 must be removed from the cable 5 each time before measurement. Therefore, it takes a lot of time and manpower, and we only measure about 7 times a month.
■ ■の方法ではコネクタ６、コネクタ６とリフマグ７
との間のケーブルおよびり７マグ７の絶縁劣化は検出で
きない。■ In the method of ■, connector 6, connector 6 and riffmag 7
Deterioration of the insulation between the cable and the magnet 7 cannot be detected.
この発明は、上述の事情Ｉ／ｃ鑑み、インダクタンス負
荷を取シはずすことなく、ケーブルおよびインダクタン
ス負荷の絶−不良を検出することを可能にする絶縁不良
検出−法を提供するもので、ケーブルの縁間へ為周波電
源の出力を供給し、仁の高周波電源の出力１［Ｋ基づい
て、絶縁不良を検出する仁とを特徴とする。In view of the above-mentioned circumstances, the present invention provides an insulation failure detection method that makes it possible to detect an absolute failure of a cable and an inductance load without removing the inductance load. It is characterized by supplying the output of a high-frequency power source to the edge and detecting an insulation failure based on the output of the high-frequency power source.
以下、図面に基づいて本発明の詳細な説明する。Hereinafter, the present invention will be described in detail based on the drawings.
第２図は本発明の一実施例を示す図であシ、図において
第７図の各部に対応する部分には同一の符号を付し、そ
の説明を省略する。９は高周波電源で、その一端９＆は
、電流計１０、電源オン・オフ用マグネットスイッチの
インターロック用接点１１ｍを介して電源制御盤１の出
力端子２ａに接続されている。また、高周波−源９の他
の出力＋１１１９ｂは上記マグネットスイッチのインタ
ーロック用筆Ａ１１ｂを介して、出力端子２ｂＫ接続嘔
れている。この接点ｉｔａ、１１ｂは電源オンにおいて
は、オフとなｐ高周波電源９、電流計１・を保−するも
のである。なお、これらの構成ｌＩ！素９．１０．１０
＆、１１ｂＵいずれも電源制御盤１に設けられている。FIG. 2 is a diagram showing an embodiment of the present invention. In the figure, parts corresponding to those in FIG. 7 are designated by the same reference numerals, and their explanations will be omitted. Reference numeral 9 denotes a high frequency power source, one end 9& of which is connected to the output terminal 2a of the power control panel 1 via an ammeter 10 and an interlock contact 11m of a power on/off magnetic switch. Further, the other output +1119b of the high frequency source 9 is connected to the output terminal 2bK via the interlock brush A11b of the magnetic switch. The contacts ita and 11b are turned off when the power is turned on to maintain the p-high frequency power source 9 and the ammeter 1. In addition, these configurations lI! Elementary 9.10.10
&, 11bU are both provided in the power supply control panel 1.
第３図は、第一図に示す本実施例の等価回路図
１である。図において、１２はケーブルの線間絶縁抵
抗で抵抗ｗｊＬＲ，１３はり７マグコイルでその抵抗分
が１３１（抵抗値Ｒ１）、インダクタンス分が１３ｂ（
インダクタンスし）である。また、７ｍ、７ｂはリフマ
グ７の端子台である。こむで、高周波電源９の出力電圧
の角周波数を１１実効値をＥ１電流計１０を流れる電流
の実効値を工とすれば
Ｉ＝１債＋「＋５１・Ｅ・・・・・・ （１）が成立す
る。ここで絶縁抵抗値Ｒは、正常時には非富に大きな値
であシ、一方コイル１３の抵抗値Ｒ１は極めて小さな値
である。また、角周波数１はケーブル３，５やコイル１
３の浮遊容量などのためＫある程度以上の値には決定で
きない。したがってインピーダンスｍＬは一般に絶縁抵
抗値Ｒよシもかなり小ざい値をとる。しかし、コイル１
３の抵抗値Ｒ１よシもはるかに大きい値をとることがで
きるから、結局次式が成立する。Figure 3 is an equivalent circuit diagram of this embodiment shown in Figure 1.
It is 1. In the figure, 12 is the insulation resistance between the lines of the cable, resistance wjLR, 13 is the 7-mag coil, its resistance is 131 (resistance value R1), and the inductance is 13b (
inductance). Further, 7m and 7b are terminal blocks of the riffmag 7. Now, if the angular frequency of the output voltage of the high frequency power supply 9 is 11 the effective value of E1 and the effective value of the current flowing through the ammeter 10 is E, then I = 1 bond + "+51・E... (1) holds.Here, the insulation resistance value R is an extremely large value under normal conditions, while the resistance value R1 of the coil 13 is an extremely small value.Furthermore, the angular frequency 1 is
Due to the stray capacitance of 3, etc., K cannot be determined to a value above a certain level. Therefore, the impedance mL generally takes a value much smaller than the insulation resistance value R. However, coil 1
Since the resistance value R1 of 3 can also take a much larger value, the following equation holds true after all.
Ｒｔｉ＜＜ｙＬ＜＜ｇ ・・・・・・・・・
（２）（２）式からＲ１＜＜−ｔ、なので、（１）式
のＲ１が省略できて次式が成立する。Rti<<yL<<g ・・・・・・・・・
(2) Since R1<<-t from equation (2), R1 in equation (1) can be omitted and the following equation holds true.
ここで、ＩＩＬ／Ｒ＝αとおいてＧ）式を変形すると、
１ ”” ＩＦ Ｌ ％丁荀・Ｅ ・・・・・・・・・
（４）が成立する。ところで、ケーブル３．５が正常
のときには、（４）式からα（１であるが、ケーブル３
．５に絶縁不良が発生し、例えばα＝０．５すなわち、
絶縁抵抗値Ｒがインピーダンス１９Ｌのλ倍程度にまで
減少したとすると、７７４４１戸中１．１２であるから
（４）式よシミ流Ｉｔｉ通常値よシｌコ一はど増加し、
これによって絶縁不良を検出することができる。Here, if we transform equation G by setting IIL/R=α, we get
1 ”” IF L % Ding Xun・E ・・・・・・・・・
(4) holds true. By the way, when cable 3.5 is normal, α(1) is obtained from equation (4), but cable 3.5 is
．． 5, an insulation failure occurs, for example, α=0.5, that is,
Assuming that the insulation resistance value R decreases to about λ times the impedance 19L, it is 1.12 out of 77441, so according to equation (4), the stain flow Iti increases from the normal value,
This makes it possible to detect insulation defects.
従って検査のたびにケーブル５とり７マグ７を切シはな
すことなくケーブル３．５の絶縁検査を行うことができ
る。ｔた、ＩＪ７マグコイル１３のレアショートなどに
よシインダクタンスＬが減少すると、（４）式より電流
値Ｉが増加し、これも検出することができる。Therefore, the insulation of the cable 3.5 can be inspected without cutting the cable 5 and the magnet 7 every time the inspection is carried out. Furthermore, when the inductance L decreases due to a short circuit in the IJ7 magnetic coil 13, the current value I increases according to equation (4), and this can also be detected.
なお、上記実施例では、電流検出手段として亀流計ｌＯ
を用いたが、電流検出リレーを用いることもできる。In the above embodiment, a turtle current meter IO is used as the current detection means.
However, a current detection relay can also be used.
また、上記実施例のように、高周波電１Ｉｌ１９、電流
計１０を電源制御盤１に収納せず、独立し九装置として
構成し、携帯用とすることも可能である。Further, as in the above embodiment, the high frequency electric current 1Il19 and the ammeter 10 are not housed in the power supply control panel 1, but can be configured as nine independent devices to make it portable.
ざらに、この発明はり７マグのみでなく、セパレーショ
ンマグネット（セパマグ）や他のインダクタンス負荷の
電流供給装置の絶縁不良検出方法として適用することが
できる。In general, the present invention can be applied not only to beam 7 mags, but also as a method for detecting insulation defects in current supply devices for separation magnets (sepa mags) and other inductance loads.
上述したように、この発明はケーブルの縁間へ高周波電
源の出力を供給し、この時の高周波電源の出力電流に基
づいて絶縁不良を検出するようにしたので、リフマグを
取シはずすことなく絶縁不良を検出することができる。As mentioned above, this invention supplies the output of a high-frequency power source between the edges of the cable, and detects insulation failure based on the output current of the high-frequency power source at this time, so the insulation can be removed without removing the riffmag. Defects can be detected.
また、その結果次のような利点が得られる。Moreover, as a result, the following advantages can be obtained.
■ リフマグを取シはすすのに簀し大作業人員と時間と
を減少式せることが１できる。■ It is possible to reduce the amount of labor and time needed to carry out the large-scale work by keeping the riff mug in place.
■ 絶縁不良検査が蘭累化されたことによシ、今まで月
−同程度であつ九検査を毎日でも実施することかでき、
クレーン作業の安全度を高めることができる。■ Now that inspections for insulation defects have become more comprehensive, it is now possible to carry out nine inspections every day at the same rate as every month.
The safety level of crane work can be increased.
■ ＋７７マグコイルのレアショート等の異常も検出で
き、リフマグの信頼度を高くすることができる。■ Abnormalities such as rare shorts in the +77 mag coil can also be detected, increasing the reliability of the riff mag.
第１図はリフマグの電流供給装置の構成を示す図、第２
図は本発明による絶縁不良検出方法を適用し九リフマグ
の電流供給装置の構成を示す図、第３図はその等価回路
である。
３．５・・・・・・ケーブル、７・・・・・・リフマグ
（インダクタンス負荷）、９・・・・・・高周波電源、
１０・・・・・・電流針（電流検出手段）。Figure 1 is a diagram showing the configuration of the current supply device of RiffMag, Figure 2
The figure shows the configuration of a current supply device for a nine-finger magnet to which the insulation defect detection method according to the present invention is applied, and FIG. 3 shows its equivalent circuit. 3.5...Cable, 7...Rifmag (inductance load), 9...High frequency power supply,
10... Current needle (current detection means).
Claims (1)
良を検出する絶縁不良検出方法において、前記ケーブル
の線間へ高周波電源の出力、を供給し、前記高周波電源
の出力電流に基づいて、結縁不良を検出することを特歓
とする絶縁不良検出方法。In the insulation failure detection method for detecting insulation failure in a cable that supplies current to an inductance load, the output of a high frequency power source is supplied between the lines of the cable, and a connection failure is detected based on the output current of the high frequency power source. A method for detecting insulation defects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57083735A JPS58200172A (en) | 1982-05-18 | 1982-05-18 | Detection of insulation defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57083735A JPS58200172A (en) | 1982-05-18 | 1982-05-18 | Detection of insulation defect |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58200172A true JPS58200172A (en) | 1983-11-21 |
| JPH0316625B2 JPH0316625B2 (en) | 1991-03-06 |
Family
ID=13810779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57083735A Granted JPS58200172A (en) | 1982-05-18 | 1982-05-18 | Detection of insulation defect |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58200172A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013177230A (en) * | 2012-02-28 | 2013-09-09 | Tadano Ltd | Load detecting device of crane |
| JP2017001869A (en) * | 2015-06-15 | 2017-01-05 | コベルコ建機株式会社 | Magnet work machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5522684U (en) * | 1978-08-02 | 1980-02-14 | ||
| JPS5559348A (en) * | 1978-10-30 | 1980-05-02 | Tokyo Electric Power Co Inc:The | Winding short detecting method for transformer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51137136A (en) * | 1975-05-23 | 1976-11-26 | Nippon Furnace Kogyo Kaisha Ltd | Combustion system for fuel gas |
-
1982
- 1982-05-18 JP JP57083735A patent/JPS58200172A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5522684U (en) * | 1978-08-02 | 1980-02-14 | ||
| JPS5559348A (en) * | 1978-10-30 | 1980-05-02 | Tokyo Electric Power Co Inc:The | Winding short detecting method for transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013177230A (en) * | 2012-02-28 | 2013-09-09 | Tadano Ltd | Load detecting device of crane |
| JP2017001869A (en) * | 2015-06-15 | 2017-01-05 | コベルコ建機株式会社 | Magnet work machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0316625B2 (en) | 1991-03-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4871511B2 (en) | Interrupt insulation measuring device | |
| EP0787996A1 (en) | Apparatus for detecting discontinuity of ground conductor and leak detector having function of detecting discontinuity of ground conductor | |
| JP7172135B2 (en) | Magnetic inspection device | |
| JPS58200172A (en) | Detection of insulation defect | |
| Nakayama | Online cable monitor developed in Japan | |
| US3823369A (en) | Transformer tester for indicating shorted conditions in power transformers | |
| KR102347552B1 (en) | Welding test device | |
| JP2958594B2 (en) | Insulation deterioration diagnosis device | |
| JPH08205376A (en) | High voltage generating device and high voltage test device | |
| JPH06313786A (en) | Inspection device of film | |
| JP2022047728A (en) | Filament short-circuit confirmation device and filament short-circuit confirmation method | |
| JPS6126629B2 (en) | ||
| JP7375398B2 (en) | Method for measuring voltage and current phase of secondary circuit of instrument transformer | |
| JPH11275715A (en) | Device for detecting abnormality in levitation guide coil | |
| SU995031A1 (en) | Electrical machine winding integrity checking method | |
| JPH068777B2 (en) | Hoist with wire rope damage detection function | |
| CN112684370A (en) | Ground fault detector | |
| JPH07301651A (en) | Electrical wiring trouble monitor | |
| JPS63139263A (en) | Automatic test apparatus for distribution line section | |
| JPH04208868A (en) | Uninterruptible insulation diagnostic apparatus | |
| JP2548993B2 (en) | Insulation resistance measuring device | |
| JPH05232070A (en) | Damage state diagnostic method for wire rope | |
| JPH0726788U (en) | Rotating electric machine winding defect detection device | |
| CN103698703B (en) | Detector for armature fault of direct current motor | |
| JPS5964180A (en) | Detector for disconnection of cable for spot welding |