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Question:

Why the relay back and forth fast jump between the two contacts can see an arc

Why the relay back and forth fast jump between the two contacts can see an arc. Eliminate the problem of the relay itself

Answer:

If the relay is driven by the coil class of things, in the open and closed moment, the coil also has a certain amount of internal induced current, which will make the relay output current and coil induced current to form a moment of open circuit, so will Out of the arc. Another possibility is that the power used to drive the power is too large, will also form such a phenomenon
May 9, 2017
1. The relay line has a virtual connection 2. The relay supply voltage fluctuates because the power supply capacity may drop or the power supply resistance increases. With a multimeter to measure the coil 2-terminal voltage if the fluctuation is relatively large to be able to judge. 3. other reasons, upstairs are very clear. The principle of control circuit error is not in the discussion.
May 9, 2017
There are many reasons for this phenomenon: 1. Control voltage is low. 2. The relay coil rated operating voltage is greater than the control voltage. 3. Poor control of the control line. 4. AC relay copper core short circuit ring off.
May 9, 2017
High current too late to break off, breakdown of the air, pull the arc discharge, as well as the line has the role of inductance or capacitance, we know that the current when the power hysteresis voltage, the capacitor after the discharge to power, these factors cause the arc. General generators with arc extinguishing device will reduce the arc.
May 9, 2017
Coil power problem, the relay coil is not electric he is not action, check the control line can (your relay itself is no problem) hope to help you -
May 9, 2017

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