Advancement in ceramic insulators - PowerPoint PPT Presentation
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Advancement in ceramic insulators
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ceramic insulators generally fabricated by the traditional way but today for further quality improvement in the ceramics insulator we should use the advance research for better microstructure of ceramic body – PowerPoint PPT presentation
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Title: Advancement in ceramic insulators
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ADVANCEMENT IN MANUFACTURING OF INSULATOR
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SUBMITTED BY - HARSHIT KARNANI
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APPLICATION OF CERAMICS
- INSULATOR
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INSULATOR
- There are large number of applications of
ceramics in number of fields but here we are
concerned about one of the most important and
widespread application of ceramics that is
insulator. - An insulator, also called a dielectric, is a
material that resists the flow of electric
current.
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INSULATORS
- Used in parts of electrical equipment.
- These are characterized by having a large band
gap. - Insulators suffer from the phenomenon of
electrical breakdown.
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PIN INSULATOR
- These are available in both one piece and multi
piece construct are less vulnerable to damage and
can normally withstand the line voltage for a
considerable time without difficulty. Generally
are of two types11K.V 22 K.V.
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DISC INSULATOR
- Smooth rounded contours of shell provide
protection against chipping. Caps are made of
malleable cast irons and pins of forged steel.
These are galvanized to provide better protection
against corrosion.
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CAPACITOR BUSHING
- Capacitor bushing are generally suitable for use
in high-voltage applications. Their thermal
resistant property makes them extensively used in
electrical industry.
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LIGHTNING ARRESTOR
- Lightning arrestor shell, are used to protect
the house in case lightning struck the antenna.
These are usually made of porcelain, Bakelite, or
glass.
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POST INSULATOR
- Post insulators are made from high quality
electrical grade porcelain which provides
excellent electrical and mechanical properties .
These insulators have a metal bolt down base as
opposed to threads
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MANUFACTURING OF INSULATORS
- Presently the manufacturing of insulators is Age
old method traditional process. - And it is not Cost Effective in Globalize
Competitive market. - Traditional shifting towards advanced.
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TRADITIONAL PROCESS
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INSULATOR MANUFACTURING
- Traditional process not effective.
- Low rates
- Poor quality
- High rejection
- Poor machinery
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ADVANCEMENT IN TECHNICAL ROUTE
- Higher Productivity with atomization in materials
flow. - Reducing rejection through advance techniques
Process Control - Utilization of non-conventional raw-materials
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RAW MATERIALS
- Basic raw materials used in the manufacturing
of insulators are - QUARTZ
- FELDSPAR
- DIFFERENT TYPE OF CLAYS
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ADVANCEMENT IN RAW MATERIAL
- Raw materials are not checked properly, contains
impurities, free silica etc. - Microstructure is not as required to give
engineering propertiesfailed at site by
electrical
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MACHINERY USED
- BALL MILL
- PUG MILL
- COPYING AND MAKING MACHINES
- TUNNEL KILN
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ADVANCEMENT-BALL MILL
- Ratio of materials
- Refilling of pebbles
- Water quantity
- Proper management of ball mill
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ADVANCEMENT-PUG MILL
- Proper de-airing
- Vacuum pump must be configured properly
- Air bubbles must be removed properly
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ADVANCEMENT-COPYING AND MAKING
- Change of blades at regular intervals
- Must be done in proper way to avoid micro cracks
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ADVANCEMENT-TUNNEL KILN
- Top and bottom temp difference on trolleys
- Non uniform firing curve
- Proper burner adjustment
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IMPORTANT TESTS
- HIGH VOLTAGE TESTING TRANSFORMER
- POROSTY MACHINE TESTING MACHINE
- MECHANICAL LOAD AND MEASURING SETUP
- UNIVERSAL TESTING MACHINE
- OIL BATH TEST
- GALVANIZING TEST
- TEMP. CYCLE TEST SET
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THANK YOU
- QUERIES??
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