• Title/Summary/Keyword: treeing inhibitors

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The Improvement of Radiation Characteristics of Low Density Polyethylene by Addition of Treeing Inhibitors (트리 억제제 첨가에 의한 저밀도 폴리에틸렌의 내방사선성 향상)

  • Kim, Ki-Yup;Lee, Chung;Ryu, Boo-Hyung;Lim, Kee-Joe
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.49 no.8
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    • pp.455-461
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    • 2000
  • The inhibiting effects of electrical treeing and insulation properties of LDPE contained with treeing inhibitors was studied under radiation environment. Barbituric acid and its derivatives were selected as treeing inhibitors. The inception voltage and growth of tree, AC breakdown strength, volume resistivity, high frequency capacitance, and dissipation factor were observed as a function of dose(up to 1000 kGy). And also, measurements of thermo-luminescence(TL), and gel content were carried out. Crosslinked low density polyethylene(XLPE) contained with treeing inhibitors shows better insulation characteristics such as electrical tree propagation, AC breakdown strength, and volume resistivity than those of pure LDPE. The most effective treeing inhibitor was found on the barbituric acid contained XLPE.

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Variation of Insulation Characteristics due to ${\gamma}$-ray Irradiation on LDPE Contained Treeing Inhibitors (트리억제제가 첨가된 LDPE의 방사선 조사에 따른 절연특성 변화)

  • Ryu, Boo-Hyung
    • Journal of the Korean Society of Safety
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    • v.27 no.2
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    • pp.13-19
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    • 2012
  • The effectiveness of treeing resistance in low density polyethylene containing azocompounds were investigated under radiation environments. 4-(4-nitrophenylazo)-1-naphthol and 4-(4-nitrophenylazo) resorcinol were selected for treeing inhibitors. LDPE containing the additives were crosslinked with dicumyl peroxide, irradiated by $Co^{60}$ ${\gamma}$-ray in the presence of air at room temperature. Treeing inception voltage, AC breakdown strength measurements were carried out for electrical insulation characteristics, thermoluminescence and gel contents were analyzed as various irradiation doses also. LDPE with treeing inhibitors showed much better insulation characteristics than pure LDPE. It is interpreted that molecular structures, polar groups and the type of radicals connected on the benzene ring of the additives affected electrical characteristics. From the results, 4-(4-nitrophenylazo) resorcinol was the most effective upon the best treeing and radiation resistance.

A Study on Insulation Characteristics of XLPE by Treeing Inhibitor (트리지연제 첨가에 의한 전력 Cable용 XLPE의 절연특성에 관한 연구)

  • Kim, Gyu-Sik;Ryu, Boo-Hyung;Park, Soo-Gil
    • Proceedings of the KIEE Conference
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    • 2000.11c
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    • pp.550-552
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    • 2000
  • Treeing inhibitors are added in XLPE matrix to investigate the effect on electrical properties of XLPE. The treeing inhibitors are barbituric acid, 4- (4-Nitrophenylazo) resorcinol and 4-(4-Nitrophenylazo) naphthol. Added amount of each treeing inhibitors were varied form 0phr to 2.0phr. In order to know the changes of electrical properties, break down strength, $tan{\delta}$, and ${\varepsilon}_r$ were measured. Experimental results showed that electrical properties of each sample was slightly changed by amount of additives.

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A Study on electrical Characteristics of XLPE by additives (첨가제에 의한 전력 cable용 XLPE의 전기적 특성에 관한 연구)

  • 김규식;손원근;임기조;박수길
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2000.11a
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    • pp.61-64
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    • 2000
  • Three kinds of treeing inhibitors are added to investigate the effect on electrical properties of XLPE. The treeing inhibitors are barbituric acid, 4- (4-Nitrophenylazo) resorcinol and 4- (4-Nitrophenylazo) naphthol. Added amount of each treeing inhibitors varied form 0phr to 2.0phr. In order to know the changes of electrical properties, break down strength, tan$\delta$, and $\varepsilon$$_{r}$ were measured. Experimental results showed that electrical properties of each sample was slightly changed by amount of additives.s.

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The Improvement of Radiation Characteristics of Low Density Polyethylene by Adding Treeing Inhibitors (I) (트리억제제 첨가에 의한 저밀도 폴리에틸렌의 내방사선성 향상 (I))

  • Kim, Ki-Yup;Lee, Chung;Ryu, Boo-Hyung;Lim, Kee-Joe
    • Proceedings of the KIEE Conference
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    • 1999.11d
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    • pp.926-928
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    • 1999
  • Treeing inhibitors of barbituric acid derivatives effects on the electrical properties of crosslinked low density polyethylene under radiation environments were investigated. The electrical parameters for tree inception voltage, AC breakdown strength, volume resistivity, capacitance and dissipation factor at 1MHz and thermoluminescence, gel content measurements were discussed as a function of irradiated dosages. From the results, barbituric acid among the treeing inhibitors was shown the best treeing and radiation resistance.

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A Study on electrical Characteristics of XLPE by additives (첨가제에 의한 전력 cable용 XLPE의 전기적 특성에 관한 연구)

  • 김규식;손원근;임기조;박수길
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2000.11a
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    • pp.61-64
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    • 2000
  • Three kinds of treeing inhibitors are added to investigate the effect on electrical properties of XLPE. The treeing inhibitors are barbituric acid, 4- (4-Nitrophenylazo) resorcinol and 4-(4-Nitrophenylazo) naphthol. Added amount of each treeing inhibitors varied form 0phr to 2.0phr. In order to know the changes of electrical properties, break down strength, tan$\delta$, and $\varepsilon$$_{r}$ were measured. Experimental results showed that electrical properties of each sample was slightly changed by amount of additives.s.

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A Study on Insulation Characteristics of Low Density Polyethylene Contained Various Additives (첨가제를 함유한 저밀도 폴리에틸렌의 절연특성에 관한 연구)

  • Lee, Chung;Kim, Gyu-Baek;Ryu, Boo-Hyung;Kim, Ki-Yup;Park, Soo-Gil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1999.11a
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    • pp.483-486
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    • 1999
  • The treeing inhibitors of barbituric acid derivatives and azocompounds effects on the electrical properties of crosslinked low density polyethylene were investigated. The electrical treeing parameters for tree inception voltage, AC breakdown strength. volume resistivity, capacitance and dissipation factor at 1Mz and thermoluminescence measurements were discussed. From the results, 4- (4-nitrophenylazo) resorcinol among the treeing inhibitors was shown good insulation characteristics.

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A study on insulation Characteristics of XLPE by various additives (다양한 첨가제에 따른 가교폴리에틸렌의 절연특성 분석)

  • Song, Sang-Min;Kim, Gyu-Sik;Son, Won-Keun;Ryu, Boo-Hyung;Park, Soo-Gil
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.05c
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    • pp.193-196
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    • 2001
  • XLPE is occasionally happened to deteriorate cable insulation characteristics. It is happened to do a breakdown state by the degradation of electrical characteristic and electrical breakdown strength. I prepared TR-XLPE (Tree-Retardant XLPE) as adding various additives to prevent its states. Various additives are treeing retardants, anti-oxidants. Treeing retardants three kinds of aromatic compounds as adding each additive. Anti-oxidants use quinone compound and cresol compound as adding each additive. In order to observe each electrical characteristics, I measured breakdown strength, relative dielectric constant$({\varepsilon}_r)$, dielectric loss tangent$(tan{\delta})$. TR-XLPE specimens as adding treeing retardants and anti-oxidants enhance breakdown strength, ${\varepsilon}_r$, $tan{\delta}$ than pure XLPE.

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