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Results tagged with relay
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user 276098
A relay is an electrically controlled switch. Electromechanical relays use an electromagnet to activate mechanical contacts, solid-state relays use semiconductor switches.
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Transformer synchronization
This occurs at approximately 40% of rated voltage, causing the synchronization check relay to activate and the transformer breaker to trip if it is not already open. … What is the point of the relay opening, if the transformer breaker has already tripped? Also, what do they mean by "40% of rated voltage". Primary side or secondary? …
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