Assertion: relay | /r/HasProperty | electromechanical device
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: A relay is usually an electromechanical device that is actuated by an electrical current.
text: Since relays are electromechanical devices, they are not suitable for PWM style outputs.
text: A Relay is an electromechanical device that acts as a switch between two terminals.