How To Adjust The Return Coefficient Of The Current Relay?

There are many factors that affect the return coefficient, such as the finish of the shaft tip, the cleanliness of the bearing, and the position of the static contact. But the more significant impact is the gap between the end of the tongue and the magnetic pole and the position of the tongue. The adjustment methods of the return coefficient are:

1. Changing the starting angle and ending angle of the tongue Adjust the starting position of the tongue at the top left of the relay to limit the screw to change the starting position angle of the tongue. At this time, only the operating current can be changed, and the return current has almost no effect. Therefore, the starting angle of the tongue is changed to adjust the operating current and return coefficient. The greater the distance between the starting position of the tongue and the magnetic pole, the smaller the return coefficient; on the contrary, the larger the return coefficient. Adjust the tongue end position limit screw on the upper right of the relay to change the tongue end position angle. At this time, only the return current can be changed without affecting the action current. Therefore, the planting angle of the tongue is changed to adjust the return current and return coefficient. The greater the gap between the position of the tongue and the magnetic pole, the greater the return coefficient; on the contrary, the smaller the return coefficient;

2. The starting angle and ending angle of the tongue are not changed, and the bending degree of the two ends of the tongue is changed to change the distance between the tongue and the magnetic pole, which can also achieve the purpose of adjusting the return coefficient. The greater the distance, the greater the return coefficient, and vice versa, the smaller the return coefficient;

3. Properly adjusting the contact force can also change the return coefficient, but it should be noted that the contact force should not be too small.