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Relay Maintenance

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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?

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?

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?

They are not blackened due to arcing (correct)

They have pitting of carbon contacts

They are loose

They are blackened due to arcing

Relay Maintenance

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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 should be ensured about the conditions inside the relay?

What should be ensured about the relay's metal contacts?

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