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Questions and Answers
What is the recommended action if high contact resistance is observed on any contact of a relay during routine inspection and maintenance?
What is the recommended action if high contact resistance is observed on any contact of a relay during routine inspection and maintenance?
- Clean the relay
- Ensure no loose connection
- Check for rusting or sulphation
- Use a spare contact or replace the relay (correct)
What should be ensured about the conditions inside the relay?
What should be ensured about the conditions inside the relay?
- There are no foreign materials or water vapour (correct)
- There is water vapour
- There is dust
- There is rusting or sulphation
What should be ensured about the relay's metal contacts?
What should be ensured about the relay's metal contacts?
- They are not blackened due to arcing (correct)
- They have pitting of carbon contacts
- They are loose
- They are blackened due to arcing
