Recent Advances in Transmission Insulators | EveryEng

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Recent Advances in Transmission Insulators

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617 min

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Why enroll

Participants should join this course to gain updated knowledge on UHV transmission insulation design.It is ideal for students, engineers, and professionals who want strong fundamentals with practical insights.The course helps in understanding real-world challenges and prepares learners for advanced power system work.

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Is this course for you?

You should take this if

You work in Automotive
You're a Electrical Engineering professional
You have 3+ years of hands-on experience in this field
You want to build skills in Engineering & Design, Project Management

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Electrical Engineering
You need live interaction with an instructor

Course details

This course explains the latest developments in EHV and UHV transmission insulators in a clear and simple manner. It begins by introducing the importance of EHV/UHV transmission in modern power systems and highlights its present role as well as future growth. Learners gain an understanding of UHV transmission networks and the need for advanced insulation techniques. The course covers various types of insulators used in EHV/UHV systems along with their applications. Special emphasis is given to newer design criteria and insulation requirements for UHV transmission lines. Participants learn about key electrical, mechanical, and environmental design considerations. Practical challenges such as pollution effects, weather conditions, and aging of insulators are discussed in detail. The concepts are reinforced through real-life examples and practical video demonstrations. Assignment exercises help learners apply theoretical knowledge to practical design problems. Overall, the course builds strong fundamentals while providing insight into modern industry practices.

Source: NPTEL - Indian Institute of Science , Bangaluru [Youtube Channel]

Course suitable for

Key topics covered

Recent Advances in Transmission Insulators – Introduction
Introduction to Transmission and Distribution Insulators
Manufacturing Process for Ceramic and Glass Insulators
Manufacturing Process for Polymeric Insulators
Design Considerations of Transmission Insulators
Field Experience of Ceramic, Glass, and Polymeric Insulators
Comparison of Different Types of Transmission Insulators
Environmental Issues Related to Transmission Insulators
Reliability Aspects and Philosophy of Testing
Testing of Ceramic, Glass, and Composite Insulators
Cleaning Methods Adopted for Insulators
Cleaning Methods Adopted for Insulators (Continued)
Coating Techniques for Transmission Insulators
Introduction to Hybrid Insulators

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

14 lectures10 hr 17 min

Recent Advances in Transmission Insulators Intro
12 min
Introduction to Transmission and distribution Insulators
24 min
Manufacturing process for Ceramic/glass Insulators
42 min
Manufacturing process for Polymeric Insulators
45 min
Design Considerations of Transmission Insulators
43 min
Field experience of Ceramic/ Glass and Polymeric Insulators
44 min
Comparison of Transmission Insulators
40 min
Environmental issues with transmission Insulators
43 min
Reliability and philosophy of testing
41 min
Testing of Ceramic, Glass and Composite Insulators
94 min
Cleaning methods adopted for Insulators
60 min
Cleaning methods adopted for Insulators (Cont)
43 min
Coating techniques for Insulators
51 min
Introduction to Hybrid Insulators
35 min

Opportunities that await you!

Skills & tools you'll gain

Engineering & Design

Project Management

Research & Developmnet

Career opportunities

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Questions and Answers

Q: You're reviewing live line performance data after a coastal storm and searching "silicone rubber transmission insulator hydrophobicity loss leakage current response". The SCADA trend shows a step increase in leakage current on a 400 kV composite string, but no flashover. What downstream behavior do you expect next, and what's the correct engineering response?

A: A: Dry bands form, not a benign increase in resistance. Waiting ignores dry-band arcing risk. B: That's the known silicone behavior; monitoring plus coating is the least-risk move. C: Rings don't cause bulk leakage current steps; pulling them worsens field stress. D: Corrosion doesn't show up as a sudden current step after a storm.

Q: Your lead sends you a sizing check and you Google "IEC 60815 creepage distance calculation heavy pollution 220 kV". For a 220 kV system (Um = 245 kV) in heavy pollution using polymer insulators, what minimum specific creepage distance applies?

A: A: Wrong pollution class; 25 mm/kV maps to light conditions. B: Uses line-to-ground and undercounts length. C: Heavy pollution per IEC uses Um and 40 mm/kV; the math closes. D: Nominal voltage sneaks in and trims margin you don't have.

Q: You're reviewing rev 4 GA drawings and searching "transmission insulator drawing corona ring symbol interpretation". The drawing shows a dashed toroid at one end of a composite long rod. What does that symbol actually call out?

A: A: The dashed toroid with a note reference is a required component; the note locks it. B: Altitude condition would be explicit in the title block. C: Transport hardware is boxed and clearly tagged 'remove'. D: Arcing horns have a different symbol and clear gap callout.

Q: After 40,000 km equivalent exposure, you search "RTV coated porcelain insulator aging leakage current increase response". Leakage current rises during fog events on RTV-coated porcelain strings. What's the expected progression and the correct response?

A: A: RTV ages; there's no infinite self-heal. B: That's the known aging path; adhesion checks matter before recoating. C: Glaze failure is rare and not fog-coupled like this. D: Field current spikes during fog are real, not noise.