Relay contacts have three basic forms

contact form

Relay (relay manufacturer) contacts have three basic forms:

1, movable type (Chang Kai) (H) coil is not energized when the two contacts are disconnected, energized, the two contacts are closed. The word phonetic prefix "H" said.

2, dynamic type (Chang Bi) (D) coil is not energized when the two contacts are closed, after the power off the two contacts. With the hyphenation of phonetic prefix "D" said.

3, conversion type (Z type) this is the contact type. The contact group is provided with three contact points, namely, the middle is a movable contact, and the upper and the lower static contacts. The coil is not energized, the movable contact and a static contact disconnect and another closed coil is energized, the movable contacts on the move, the original broken into closed, the original closed into a disconnected state, to achieve the purpose of conversion. The contact group is called a transition contact. With the "turn" the word phonetic prefix "Z" said.