JP6800931B2 - 二重被覆電線の試験方法 - Google Patents
二重被覆電線の試験方法 Download PDFInfo
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- JP6800931B2 JP6800931B2 JP2018185353A JP2018185353A JP6800931B2 JP 6800931 B2 JP6800931 B2 JP 6800931B2 JP 2018185353 A JP2018185353 A JP 2018185353A JP 2018185353 A JP2018185353 A JP 2018185353A JP 6800931 B2 JP6800931 B2 JP 6800931B2
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- wire
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- insulation
- insulating film
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- 238000010998 test method Methods 0.000 title claims description 13
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- 238000012360 testing method Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 210000003298 dental enamel Anatomy 0.000 description 6
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- 229920003055 poly(ester-imide) Polymers 0.000 description 2
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- 229920000728 polyester Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Description
ここで、絶縁欠陥とは、製造工程で形成されたピンホール(貫通孔)及び通電時に絶縁破壊を引き起こしてピンホールが形成されるような欠陥(異物、ボイドなど)を含む。
二重被覆電線の導体と外被に摺接する電極との間に電圧を印加し、前記二重被覆電線の素線絶縁部及び前記外被の絶縁欠陥を検出する試験方法であって、
前記素線絶縁部の絶縁破壊電圧の平均値をVa、前記外被の絶縁破壊電圧の平均値をVb、及びスパークテストにおける印加電圧をVcとしたとき、
Va<Vc<Vb
の関係を満たすことを特徴とする。
図1に示すように、外被付きリッツ線1は、素線部10及び素線部10を被覆する外被20を備える。
絶縁皮膜112の膜厚は、例えば、0.002〜0.016mmである。これにより、製造コストを抑制しつつ、最低限の絶縁性能を確保することができる。
言い換えると、スパークテストにおいて、印加電圧Vcは、絶縁皮膜112の平均絶縁破壊電圧Vaよりも大きく、外被20の平均絶縁破壊電圧Vbよりも小さく設定されている。
0.80kV<4.00±0.03kV<9.50kV
を満たす。
本実施の形態の外被付きリッツ線1(二重被覆電線)の基本構造は図1について説明した前述のとおりである。
本実施の形態の外被付きリッツ線1(二重被覆電線)においては、「Va<Vb」及び「|A−B|≧0.10kV」を満たすように、設計されている。
0.80kV<9.50kV、及び、
|2.18kV−6.43kV|=|−4.25kV|=4.25kV≧0.10kV
の関係を満たす。このときの絶縁皮膜112の厚さは、0.004〜0.010mmが好ましく、外被20の厚さは、0.07〜0.15mmが好ましい。
したがって、「Va<Vb」及び「|A−B|≧0.10kV」を満たすように外被付きリッツ線1(二重被覆電線)の絶縁皮膜112、外被20それぞれの絶縁破壊電圧の関係を考慮した厚さを設計することができる。すなわち、スパークテスト(二重被覆電線の試験方法)において絶縁欠陥を全長にわたって確実に検出することができる外被付きリッツ線1(二重被覆電線)を設計することができる。
10 素線部
11 素線
111 導体
112 絶縁皮膜(素線絶縁部)
20 外被
Claims (3)
- 二重被覆電線の導体と外被に摺接する電極との間に電圧を印加し、前記二重被覆電線の素線絶縁部及び前記外被の絶縁欠陥を検出する試験方法であって、
前記素線絶縁部の絶縁破壊電圧の平均値をVa、前記外被の絶縁破壊電圧の平均値をVb、及びスパークテストにおける印加電圧をVcとしたとき、
Va<Vc<Vb
の関係を満たす、二重被覆電線の試験方法。 - 前記印加電圧Vcのばらつきをγとしたとき、
Va<Vc±γ<Vb(γは、標準偏差の3倍以上)
の関係を満たす、請求項1に記載の二重被覆電線の試験方法。 - 前記素線絶縁部は、前記導体に焼き付ける絶縁皮膜である、請求項1又は2に記載の二重被覆電線の試験方法。
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JP2018185353A JP6800931B2 (ja) | 2018-09-28 | 2018-09-28 | 二重被覆電線の試験方法 |
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JP2020057462A JP2020057462A (ja) | 2020-04-09 |
JP6800931B2 true JP6800931B2 (ja) | 2020-12-16 |
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US20230162886A1 (en) * | 2020-04-16 | 2023-05-25 | Totoku Electric Co., Ltd. | Heat-resistant insulated wire |
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