Multistress accelerated aging of polymer housed surge arresters under simulated coastal Florida conditions

Sundararajan, Raji; Soundarajan, E.; Mohammed, Abbas; Graves, James E.

doi:10.1109/tdei.2006.1593419

Cited by 56 publications

(29 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mere sunlight is not enough for causing deterioration. Chromophoric groups are also necessary to absorb the incident radiation and transfer energy to the bond [17] . In polymers, chromophoric groups are present in the unsaturated structures, such as carbonyl groups which are formed during manufacturing.…”

Section: Discussionmentioning

confidence: 99%

“…This results from the breakage of certain molecular bonds by the UV radiation on polymers as these are more susceptible to oxidation [11][12][13]15,17] . The surface roughness will be a source of dust and pollution accumulation and hence can cause decline in the dielectric performance of the composite insulator in the long term operation in actual power system.…”

Section: Discussionmentioning

confidence: 99%

“…Both service experience [1] and the laboratory tests demonstrated a better performance in contaminated conditions [2,3] . Porcelain and glass have traditionally been used as the oldest and most economic insulating materials and their advantages and drawbacks are well known.…”

Section: Introductionmentioning

confidence: 95%

“…Porcelain and glass have traditionally been used as the oldest and most economic insulating materials and their advantages and drawbacks are well known. However, the polymeric insulators have replaced ceramic units due to wide range of reasons such as lightweight, less cost, high mechanical strength, resistance to contamination [1][2][3] . Figure 1 shows the breakup of these reasons obtained during a survey [4] .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Khan¹

2009

American J. of Engineering and Applied Sciences

View full text Add to dashboard Cite

Problem statement: High Voltage (HV) polymeric insulators are replacing ceramic insulator commonly used for HV outdoor networks due to their ease of handling, reliability and cost. However, their long term performance and reliability are major concerns to power utilities. Approach: To investigate their performance in arid desert's conditions, two types of HV composite insulators were aged as per International Electrochemical Commission (IEC) standard-61109. Additional test samples were subjected to accelerated aging conditions simulating the actual Ultraviolet (UV) radiation intensity and temperature in the inland desert. Results: This study described the experimental results of the effects of thermo electric stress and UV radiations on the polymeric insulators aged under two conditions i.e., as per IEC standard and modified IEC standard that simulates the inland arid desert. The tests results after the artificial accelerated aging indicated that the dielectric response of thermoplastic insulators under the tested thermo-electric cum UV-irradiations outperforms Silicone rubber insulators. Conclusion: From the obtained results it will be easy to assess the performance and suitability of composite insulators for their applications in arid desert environments.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Khan¹

2009

American J. of Engineering and Applied Sciences

View full text Add to dashboard Cite

show abstract

“…However, despite all these advantages, composite insulators have suffered in service from different failure modes [1]. Indeed, the overall quality of the composite insulators is strongly dependent on many factors such as the type of filler and the resin matrix [2,3], the interfacial properties [4,5], the polymer surface roughness [6,7] or the manufacturing conditions [8,9]. Besides structural parameters, 7 April 2009. the immediate environmental stresses can also be responsible for the electrical failure of composite insulators.…”

Section: Introductionmentioning

confidence: 99%

Effects of electric partial discharges on the rheological and chemical properties of polymers used in HV composite insulators after railway service

Habas

Arrouy

Perrot³

2009

IEEE Trans. Dielect. Electr. Insul.

View full text Add to dashboard Cite

The origin and the consequences of the electric failure of in-service composite hollow insulators used in railway transportation were investigated. Direct electrical measurements made it possible the detection of partial discharges (PD) and UV emissions allowed of identifying the location of the PD at the interface between metal braids and a silicone liner. To investigate the effects of the damaging PD activity, physicochemical properties of the different polymers were investigated and compared to new samples. The thermomechanical properties of the HTV and RTV silicones showed important alterations in the polymers structure. The chemical analyses of the silicones and nitrile rubber conducted using ATR-FTIR spectroscopy revealed that the polymers were oxidized after electrical failure. The results indicated that the ozone production and UV emission were due to the surface electrical activities. The breakdown of alumina trihydrate (ATH) in the inner HTV silicone liner demonstrated that undesired electrical discharges induced an significant increase of temperature and the formation of moisture in the air present in the hollow insulator. Laboratory artificial aging performed on the silicones and nitrile rubber showed similar degradation as in service. Further electrical experiments conducted on empty hollow insulators enabled the detection of internal PD located in micro-voids present in the adhesive used to bond the HTV silicone liner to the inner composite tube.

show abstract

Surface degradation of styrene acrylonitrile exposed to corona discharge

Handala

Lamrous

2007

Int Trans Elec Energy Syst

View full text Add to dashboard Cite

SUMMARYAn experimental investigation of the degradation of styrene acrylonitrile (SAN) exposed to corona discharge under ambient conditions was presented. SAN specimens were subjected to a corona stress generated by two plane parallel electrodes. The surface physicochemical changes were studied using scanning electron microscope, energy-dispersive X-ray analysis, Fourier transformed infrared spectroscopy and surface resistance measurements.The results showed significant damage on the specimen' surface caused by the corona discharge. Surface erosion was seen in the micrographs and colour change was observed on the aged surface.The surface resistance dropped rapidly during the first hours of exposure to the corona discharge, then approached a saturation value asymptotically. It was established that hydrophilic hydroxyl (O-H) and carbonyl (C --O) groups have formed on the surface of the aged sample. Moisture adsorbed by the hydrophilic OH groups plays an important role in the decrease of the surface resistance, as, under dry conditions after removal from the corona discharge, the surface resistance increased and tended to recover its original value.

show abstract

Multistress accelerated aging of polymer housed surge arresters under simulated coastal Florida conditions

Cited by 56 publications

References 25 publications

Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Degradation of High Voltage Polymeric Insulators in Arid Desert's Simulated Environmental Conditions

Effects of electric partial discharges on the rheological and chemical properties of polymers used in HV composite insulators after railway service

Surface degradation of styrene acrylonitrile exposed to corona discharge

Contact Info

Product

Resources

About