Testing of Insulator and Bushings and Surge Diverters - High Voltage Engineering

TL;DR

This lecture covers the testing of insulators, bushings, and surge diverters used in high voltage applications.

Transcript

hello friends welcome back to the lecture series on high voltage engineering in this lecture we'll be discussing the testing of insulators bushing surge diverters insulator bushing and search diagonals are basically used in the power circuit the purpose of insulator and bushing is almost same and even the construction and the purpose of surge diver... Read More

Key Insights

• ⚡ Insulators, bushings, and surge diverters need to withstand high voltage applications.
• ✊ Power frequency and impulse voltage tests are conducted to ensure their overvoltage withstand capability.
• 🏆 Type tests and routine tests are performed on insulators to check design features, quality, and manufacturing consistency.
• ❓ Pollution testing is essential to evaluate the insulator's resistance to atmospheric pollution.
• 💨 Surge arresters divert overvoltages caused by switching and lightning away from the power circuit.
• 💖 Various tests, including power frequency spark over and impulse spark over tests, are conducted on surge arresters.
• 😮 Thermal stability tests are conducted to ensure that the bushings can withstand excessive temperature rise.
• ✋ High current impulse and long duration impulse current tests are performed to assess the surge arresters' performance under extreme conditions.

Questions & Answers

Q: What is the purpose of insulators, bushings, and surge diverters in power circuits?

Insulators, bushings, and surge diverters are used to hold high voltage and protect the power circuit from overvoltages.

Q: What are the two categories of overvoltage tests conducted on power apparatus?

The two categories are power frequency voltage tests and impulse voltage tests.

Q: What is the difference between type tests and routine tests for insulators?

Type tests are conducted on samples to check design features and quality, while routine tests are done on individual pieces to ensure reliability and consistency.

Q: What is the significance of pollution testing on insulators?

Pollution testing is important to evaluate the insulator's ability to withstand atmospheric conditions like dust, salt, and industrial pollution.

Summary & Key Takeaways

• Insulators, bushings, and surge diverters are essential power apparatus used in high voltage circuits.

• Testing of these apparatus is crucial to ensure their ability to withstand high voltage applications.

• Testing includes power frequency voltage tests, impulse voltage tests, and specific tests for each type of apparatus.