Testing of insulators.

What is the purpose of testing insulators?

• To ensure that the insulators are properly installed
• To identify any defects in the insulators
• To prevent the accumulation of dust on the insulators
• To check the alignment of the transmission line

Which of the following tests is used to determine the puncture voltage of an insulator?

• Thermal stability test
• Porosity test
• Power frequency voltage test
• Corona test

What is the purpose of conducting a radio interference voltage (RIV) test on insulators?

• To detect any partial discharges occurring in the insulators
• To measure the frequency response of the insulators
• To determine the flashover voltage of the insulators
• To evaluate the performance of the insulators under high humidity conditions

Which of the following tests is used to determine the wet flashover voltage of an insulator?

• High voltage test
• Power frequency voltage test
• Wet power frequency voltage test
• Dry power frequency voltage test

What is the recommended maximum value of the leakage current for insulators under test conditions?

• 5 mA
• 10 mA
• 15 mA
• 20 mA