Relays yog actuators. Nws yog ib qho hluav taws xob hloov hluav taws xob uas tuaj yeem tswj thiab tswj cov hluav taws xob hluav taws xob los ntawm kev tswj qhov kaw thiab qhib cov hluav taws xob. Lub relay tswj lub on-off lub xeev ntawm cov zis Circuit Court los ntawm kev ua kom lub teeb liab los tswj lub on-off ntawm lub electromagnet, yog li cais lub Circuit Court, kom muaj kev ruaj ntseg thiab stability, thiab yuav siv tau nyob rau hauv ntau yam tsis siv neeg tswj systems.
