More power is needed to actuate a relay than to maintain a given state.
One analogy for this relationship is that of a relay race, where the first runner represents requirements management and the next runner, receiving a baton hand off, represents test management.
The Olympic flame wrapped up its journey in Europe, America and Africa, going back to Asia with a relay on Monday in Oman capital Muscat, the only stop in Arab world.
Photocells are used in control systems, where interrupting a Beam of light opens a circuit, actuating a relay that supplies power to a mechanism to Bring about a desired operation, such as opening a door or setting off a Burglar alarm.
Assume that a multidivisional company has a Relay Division that manufactures an electrical relay widely used as a component part by various governmental contractors.
As shown in Figure 1-11, each isolated Form A relay has two terminals.
Reed Relay A relay using one or more glass - enclosed, hermetically sealed, magnetically actuated contact members.
Measure current - Model 7169 A relays remain normally open and Model 7158 relays go to normally open.