INSTALLATION & MAINTENANCE - Manufacturer of Power Transmission
Hot Line Maintenance in Transmission Section.pptx
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Transcript of Hot Line Maintenance in Transmission Section.pptx
7/27/2019 Hot Line Maintenance in Transmission Section.pptx
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Presented by: H.L. Ruchira Gunawardana
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What is hot line maintenance? Work performed on transmission lines while they are
energized and in service.
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Why we perform hot line
maintenance?
It minimizes the power interruption duration
Improves the reliability of the system Need of redundancy is minimized
Financial benefit
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What we can do? Replace suspension insulators
Replace tension insulators
Insulator washing Hardware fixing
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Hot line maintenance methods
Bare hand method
Hot stick method
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Bare hand method Linesman at line potential using a conductive kit.
(uses the faraday cage concept)
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Bare hand method….
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Hot stick method Lines man stays in the ground potential.
Lines man Keeps specified distance from the line.
Carries out the work using an insulated stick. Required tools can be mounted at the end of the
sticks.
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Necessary clearances
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Hot line tools….
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Hot stick method ….…
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Special features of hotline tools High dielectric strength
100kV/m insulation level
Moisture resistant Light weight
Mechanically strong
Orange colour
No changes on the rod due to sudden temperaturechanges
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Main requirements to do a hot line
maintenance Reliable toolkit
Good weather condition
Skilled labor Experienced supervisor (EE/ES)
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Safety precautions… Frequent testing of tools
Cleaning the sticks using silicon cloth
Inspection of towers before carrying out themaintenance
Switch off the autoreclosure function of the circuitbreakers
Frequent training
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Thank You!