Will the relay commonly used in the end of the second draw in the meantime?
Is a relay of the bad situation
The main reason is that the relay contact pressure is too large, more than the relay coil suction, resulting in closed contact between the armature and iron core is not closed between a situation, this state, the relay is easy due to instability caused by vibration Or under impact conditions. Resulting in relay failure, and such a state will lead to the relay electrical life problems.
Relay due to its electromagnetic mechanism and the mechanical structure of the characteristics of the closure process, there will be two times the phenomenon of suction. When the relay occurs once the suction, the static and dynamic contact has been closed, but closed is not close, vulnerable to external interference and malfunction. In addition, the contact resistance of the relay contact in a pull is much greater than the second contact when the contact resistance, greatly weakened the relay load capacity. So in actual production should minimize the secondary suction phenomenon on the impact of the relay
The secondary suction of the relay is caused by the following reasons
1, product attraction is insufficient, can not overcome the dynamic deformation of spring;
2, dynamic spring is too high, deformation force is too large;
3, product armature overtravel is too large, resulting in large deformation of the dynamic spring, the rebound is too large
The secondary suction of the relay is caused by the following:
1, product attraction is insufficient, can not overcome the dynamic deformation of spring;
2, dynamic spring is too high, deformation force is too large;
3, product armature overtravel is too large, resulting in large deformation of the dynamic spring, the rebound is too large.
There are three basic forms of relay contacts:
1, dynamic type (normally open) (H type) coil is not energized when the two contacts are open, power, the two contacts on the closed. To the word "H".
2, dynamic type (normally closed) (D type) coil is not energized when the two contacts are closed, after the two contacts on the power off. With the word "D" of the word.
3, conversion type (Z type) This is the contact group type. This contact group has three contacts, that is, the middle is moving contact, up and down a static contact. When the coil is not energized, the movable contact and one of the static contacts are disconnected and the other is closed. After the coil is energized, the movable contact moves, so that the original opening is closed and the original closed state is closed. purpose. Such a contact group is called a changeover contact. Use the word "z" for the word "z".
