Figure 3-19.Relay construction.
A relay can have many different types of contacts. The relay shown in figure 3-19 has contacts
known as "break-make" contacts because they break one circuit and make another when the relay is
energized. Figure 3-20 shows five different combinations of relay contacts and the names given to each.
Figure 3-20.Contact combinations.
A single relay can have several different types of contact combinations. Figure 3-21 is the contact
arrangement on a single relay that has four different contact combinations. (The letters next to the
contacts are the "forms" shown in figure 3-20.)