Form C Relay Wiring Diagram Spst. Normally open contacts spst one circuit off on. There are a variety of these.
Hongfa relay coil power pick up voltage vdc 380 450 680 900 135 180 360 drop out voltage vdc 05 06 09 12 18 24 48 65 78 117 156 234 312 624 features 1 form c 10a 277 vac 10a 120vac 12 hp 125250vac 1 form a 10a 277vac tv 5 120vac 15a 125vac 120vac 125vac 12hp125vac 8a 250vac 12a 125vac cos phi1 5a 250vac cos phi1 10a. Form a type of ssr relay is spst single pole single throw relay with normally open no terminals. Theres also a less common kind called a single pole double pole spdt or changeover relay.
A switch connects a circuit when it is closed and disconnects the circuit when open.
Act like an electrical engineer you are not on the beach. Consider this amazons choice product that delivers quickly. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a typical 3 wire open contact high limit control such as on an oil fired heating boiler. Electric fuel pump wiring diagram.