Testing of Isolators, CB, Transformers, HV Motors, Radio Interference - High Voltage Engineering | Summary and Q&A

TL;DR

This content discusses the testing methods for isolators and circuit breakers, including dielectric tests, impulse tests, temperature rise and mechanical tests, and short circuit tests.

Key Insights

• ✊ Isolators and circuit breakers have similar characteristics and are used in power system operations.
• 🛩️ Testing methods for isolators focus on their capacity to interrupt small currents, while testing methods for circuit breakers evaluate their electrical, physical, and other characteristics.
• 🏆 Dielectric tests, impulse tests, temperature rise and mechanical tests, and short circuit tests are conducted to assess the performance of isolators and circuit breakers.
• 👻 Direct testing in the network allows circuit breakers to be tested under actual conditions, while synthetic testing in laboratories simulates the effects of short circuits.

Transcript

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Questions & Answers

Q: What is the difference between isolators and circuit breakers?

Isolators are used for interrupting low currents, while circuit breakers are used for interrupting high currents.

Q: What are the main types of tests conducted on isolators and circuit breakers?

The main types of tests conducted are dielectric tests, impulse tests, temperature rise and mechanical tests, and short circuit tests.

Q: What are the characteristics studied in the electrical characteristics test of circuit breakers?

The electrical characteristics test evaluates parameters such as arcing voltage, current chopping, residual current, and rate of decrease of conductance in interruption.

Q: Why is direct testing in the network considered advantageous?

Direct testing allows circuit breakers to be tested under actual conditions and can assess the performance of specific scenarios like breaking charging current or interruption of small inductive currents.

Summary & Key Takeaways

• Isolators and circuit breakers are both types of switches used in power systems, and their testing methods share common characteristics.

• Isolators are used to interrupt low currents while circuit breakers are used to interrupt high currents.

• The testing of circuit breakers evaluates electrical, physical, and other characteristics, while the testing of isolators focuses on their capacity to carry short circuit currents.