A-PDF PPT TO PDF DEMO: Purchase from to remove the watermark

Transcription

1 EMERGING TECHNOLOGIES SILIDRIL - Polymeric Coating & SHRIJI - CONDUCTIVE SILICON GEL By: Surat Prestech Pvt. Limited Prepared By Mr. Nitin Oza, M.E. & Dr. Rafael Mier, PhD. A-PDF PPT TO PDF DEMO: Purchase from to remove the watermark

2 FROM MEXICO TO INDIA Thank You For Allowing Me To Come & Speak In Front Of You Thank You For Letting Me Come Down & Receiving Me As One Of You Thanks To YOU & Your Organization For The Kind Invitation.

3 SIMILARITIES BETWEEN MEXICO & INDIA SIMILAR CLIMATIC CONDITIONS PLACED IN SAME LATITUDE. JUNGLE AND TROPICS IN THE SOUTH AND DESERT IN THE NORTH. LARGE COAST AND SEA ON BOTH SIDES. NARROW IN THE SOUTH AND WIDE IN THE NORTH, WITH LARGE FRONTIER TO FOREIGN COUNTRIES. SAME FRUITS LIKE PAPAYA, MANGO, COCONUT, CHICO, WATERMELON, SWEETMELON, SUGARCANE, PALM TREES. FOOD IS SPICY AND HOT. ECONOMIC DISTRIBUTION IS WITH LOTS FOR A FEW AND LITTLE FOR MANY.

4 FROM MEXICO TO INDIA THE ENGINEERS IN THE WORLD BRAKE ALL BARRIERS OF DISTANCE AND LANGUAGE. WE ARE ALL TOGETHER IN THE ENDEAVOUR OF MAKING LIFE BETTER, BY TRANSFORMING YOUR & OUR IDEAS INTO TECHNICALLY ADVANCED PRODUCTS THAT WILL NOT ONLY GIVE SYSTEM RELIABILITY BUT WILL CREATE JOBS & OPPORTUNITIES.

5 FROM MEXICO TO INDIA WE PLAY AN IMPORTANT ROLE BY UNDERSTANDING YOUR TECHNICAL PROBLEM & THAN WITH OUR R & D TEAM CREAT A NEW PRODUCT FOR INDUSTRIES TO HAVE A: SYSTEM RELIABILITY

6 OUR COMPANY MISSION IS TO DEVELOP WORLD CLASS PRODUCTS FOR THE ELECTRICAL INDUSTRY IN ORDER TO ACHIEVE SYSTEM RELIABILITY

7 IN THIS PRESENTATION WE WILL HIGH LIGHT THE PROBLEMS FACED BY THE ELECTRICAL INDUSTRIES, SPECIFICALLY WITH THE PROTECTION OF HIGH VOLTAGE INSULATORS AND SWITCHYARDS, COVERING: THE LIKELY TECHNICAL REASONS & THE SOLUTIONS TO RESOLVE YOUR PROBLEMS BY OUR PRODUCTS & APPLICATIONS

8

9 Bare Porcelain/Glass Surfaces Accumulation of Contaminants Water Filming Leakage Currents Dry-band Arcing & Flashover

10 CAUSES OF FLASHOVER INDUSTRIAL POLLUTION OCEAN SPRAY AUTOMOBILE AIR BORNE SALT FOG

11 COST OF FLASHOVER Loss of Revenue Safety Implications Poor Public Relations Disruption of Business Possible extensive repairs Inconvenience to: Industry, Tourism & Consumers

12 PROTECTION METHODS Water Washing Increased Insulation Level/Creepage Distance Resistive Glaze ( RG ) Insulation Silicone Greasing Silicone Elastomeric Coatings Silicone Composite Insulators

13 WATER WASHING Safety implications Repetitive, short term solution, Can be done energised Sometimes flashover during energised washing Requires dedicated equipment and crews When and how often? High lifetime costs

14 Increased Insulation Level / Creepage Distance Typically extends time between washing/cleaning Longer surface path over insulator limits leakage current During long periods of No Rain and high humidity, flashovers may still occur May require replacement of existing insulation OR a Insulator

15 Resistive Glaze ( RG ) Insulator Retards formation of water films by heat produced from constant current flow through a resistive layer on the insulator surface Long term stability of the resistive glaze is questionable e.g. removed by sand storm abrasion Constant power losses

16 Silicone Greasing Good performance Encapsulates pollutants Waste disposal considerations Needs replacing when saturated Water repellent, arc track resistant surface Lower lifetime costs than water washing

17 Silicone Elastomeric Coatings Arc track resistance additives. Most competitive over long term. Longer in-service life time than greases. Specifically formulated for high voltage insulators. Controlled application for optimum performance and total life cycle cost. Suppresses development of leakage currents due to a dynamic and interactive surface which retards water film formation and contamination solubility.

18 Features of Silicone Elastomeric Coatings Excellent Weathering Resistance Silicone material have a backbone structure composed of Si-O bonds Organic rubber have a backbone structure composed of C-C C bonds, which are less stable These two bonds have significantly different bond energies

19 Bond Energy Comparisons BOND BOND ENERGY (kj/m) Si - O 445 C - C 348 Sunlight at 300nm Wavewlength 398 Si O, bond energy is higher than the energy of the sunlight giving a greater degree of UV stability than the C-C bond which is the backbone of EPDM Polymers.

20 HYDROPHOBICITY SURFACE β β Aged Porcelain / Glass 0 o 0 o Organic 105 o 0 o Silicone 105 o 105 o

21 ARC RESISTANT FILLER Usually Hydrated Alumina (ATH) Varies in particle size & Surface Treatment Smallest possible particle size achieves even and stable dispersion in the polymer for peak performance and shelf life

22 SOLVENT Disperses the silicone polymer to reduce viscosity for easier application Optimises the solids content Solvent Should Have: - Purity - Solubility - Evaporation Rate - Suitable for live line applications - Safety, Regulatory, Environmental

23 CURE SYSTEM Curing occurs by means of atmospheric humidity. Crosslinks the polymer molecules to form the rubber coating. Curing starts when the solvent evaporates and the product enters in contact with the air.

24 SILIDRIEL HVIC PROTECTION Hydrophobic surface prevents water filming Resistance is kept very high avoiding leakage currents. Contamination is trapped and removed by falling droplets. When arcing occurs, ATH (Hydrated Alumina) releases H2O, stopping the arc and reducing surface erosion. Maintains these features over the long life of the installation.

25 ON-SITE APPLICATION By paintbrush ok for small jobs Air Spray equipment

26 SILIDRIEL LIFETIME COST ANALYSIS SILIDRIEL in many cases is a one time long term ( 10 To 12 years) application. With SILIDRIEL HVIC installations there is NO routine maintenance just inspection at normal substation inspection times. The long term reliability and either Low or NO maintenance makes SILIDRIEL Low Low Cost RELIABLE SOLUTION.

27 LIFETIME COST COMPARISON EXERCISE Assuming coating of 1 x 66kV insulator Material and labour costs to water wash one time being RS.675/- and repeated every 3 months Material and labour costs to grease (silicone) one time being RS.3000/- repeated every 2 years Material and labour costs to coat with RS.6500/-, with anticipated life of 10 To 12 Years SILIDRIEL, RS.6500/ In-use service conditions vary widely; service life is dependant on service conditions

28 Cost of Different Protection Methods Grease HVIC Water Washing Yea r 1 Yea r 2 Yea r 3 Yea r 4 Yea r 5 Yea r 6 Yea r 7 Yea r 8 Yea r 9 Yea r 10 Yea r 11 Yea r 12 Yea r 13 Yea r 14 Yea r 15 t ( $ ) C o s

29

30 SILIDRIEL What is it and how does it work? Where to apply? How to apply?

31 SILIDRIEL Air humidity serves as a vulcanizing agent. It is a one part coating, in liquid form like a paint. It is sprayed or brushed or the insulator dipped. Preferably sprayed. The end result is a Silicone Elastomeric Thin Coating that Prevents Insulator Failure.

32 SILIDRIEL How does it work? Powder, salt and other contaminants deposit on the insulator. Humidity due to condensation, fog or rain wets the surface. Contaminants dissolve and leakage currents occur and create dry bands and arcing. A Silidriel coated insulator stays dry since the surface tension stops water from spreading. Just like wax in a polished car.

33 SILIDRIEL How does it work? Droplets wash the contaminant. Once the insulator gets wet, it does not fail since it has cleaned itself. When water stops, the insulator recovers water repellency

34 SILIDRIEL Picture for Analysis

35 Properties No contaminant adhesion. Hydrophobic. Repels water. Resistant to acids and alkalines. No carbon path formation. No tracking. Strong adhesion to Glass and Porcelain. Does not deteriorate with Solar Radiation. In extreme case it may erode BUT without tracking. Its ORANGE color, allows quick inspection at distance.

36 Application of Silidriel Use an Air Spray. For air spray use a portable compressor Air must be dried after compression A pressure bucket contains the Silidriel Two hoses, One brings Silidriel & Second brings the air to spray gun. Silidriel comes ready for application NO INFLAMABLE SOLVENTS ADDED

37

38

39

40

41

42

43

44

45

46 SPECIFICATIONS Non toxic Non explosive Low Flammability Harmless to environment Can be reapplied over the previous coating Right thickness is achieved when color looks uniform No Primer OR Solvent Required READY TO USE PACK Color : ORANGE

47 SILIDRIEL Properties SPECIFICATION VALUE STANDARD Volume Resistivity Ω-cm ASTM-D-257 Dielectric Strength 24.5 kv/mm ASTM-D-149 Dielectric Constant 100 Hz 2.59 ASTM-D-150 Dielectric Constant 100 khz 2.66 ASTM-D-150 Disipation Factor 100 Hz 1X10-4 ASTM-D-150 Disipation Factor 100 khz 1X10-4 ASTM-D-150 Inclined Plane 552 Seg at 5 kv ASTM-D Saline Fog Chamber for 120 min at salinity of 80 kg/m 3 No flashover IEC-60507

48

49

50

51 Cleaning Insulators needs to be Cleaned with Cloth and Petrol ON OFF LINE. The cleaning process is very important for adherence and durability.

52 SILIDRIEL The ideal solution to Effectively Counteract Pollution on insulators in highly contaminated zone is to: Apply Silidriel Forget about failure problems for some years. On very critical locations wash as needed. Re Apply on eroded sections only in 4 or 5 years.

53 Heavily bonded contaminant in Cement Plant in Mexico

54

55 Silidriel can take 1,000 psi washing without peeling off

56 SILIDRIEL can be pressure washed Last figure shows 1,000 psi with charge over Silidriel coating. Good cleaning but no splitting

57

58 TO SUM UP SILIDRIEL OFFERS No Addition of SOLVENT,like Naphtha+++, No Solvent No Extra Cost for Solvent Ready to USE, Eco Friendly Product, Specially Formulated ORANGE COLOR While applying SILIDRIEL on insulator of Red / Brown color, the Coating Thickness should be such that ONLY ORANGE COLOR is uniformly visible. ORANGE COLOR will be helpful in accessing from a distance during subsequent inspection. Considering all the Parameters: SILIDRIEL Proves to be the: BEST TECHNO ECONOMICAL PRODUCT

59 F.A.Q. Why the Coating gets PILL OFF By using some ALTERNATE products RTV coating - Grey / Off White Color It is Normally observed that the Coating gets PILL OFF!!! This Worsen the case As by this it decreases the Creepage Path Live & earth comes nearer. Resulting More Chances of FLASH OVER.

60 PEELING of Coating The Grey / Off White Coating from Insulators will come out in pieces. On some Insulator one may feel it is there BUT it has turned to SLEEVE. These creats the WORST situation. As by this one has decreased the Creepage Path Live & earth came nearer. Resulting More Chances of FLASH OVER.

61 Likely REASONS for PEELING of Coating The Product used: (GREY / OFF WHITE) Require Primer Might NOT have used, may be to bring down cost for comparison with Silidriel. Requires Naphtha as a Solvent & as your plant is Lignite Based, Thinner / Petrol must have been used. (As Naphtha, available in Market is Costlier) which changes the Chemical / Adhesion property. Layers shows different thickness It sounds, to finish the Job Faster, more thinner is used. While Coating Absolute DRY Climatic condition require. As product is design for U.S.A. / Europe & because of Cold Climate Condition the Atmosphere remains COLD BUT DRY.

62 Likely REASONS for PEELING of Coating Such situation of Getting DRY Climatic Condition is NOT possible in Tropical Climate Like ours & Specially for the plant based in Coastal area. In case if one wants to wash the Insulator, All the Coating will come out as because of Damp Climatic Condition, we could see that there is NO ADHESION of Coating with Insulator.

63

64

65

66

67

68

69

70

71

72 & Friends, this is NOT the END of our presentation, We look forward for your INPUTS so that we can improve / add the Technical Parameters and can start a new stage of service and can offer the products to you for achieving the SYSTEM RELIABILITY

73