1. Release current
It refers to the maximum current that a high-power relay can produce a release action. If the current of a high-power relay in the pull-in state is reduced, when the current is reduced to a certain extent, the high-power relay returns to its unenergized state. This process is called the release action of the high-power relay. The release current is much smaller than the pull-in current.
2. DC resistance
This refers to the DC resistance of the coil. Some product specifications give the rated operating voltage and DC resistance. In this case, the rated operating current can be calculated based on Ohm's law. If the rated operating current and DC resistance are known, the rated operating voltage can also be calculated.
3. Rated working voltage
This refers to the voltage or current required by the coil when working at high power. The structure of one model is generally the same. In order to adapt to circuit applications with different voltages, one type of motor usually has multiple rated working voltages or rated working currents, and are distinguished by specifications and models.
4. Pick-up current
It refers to the minimum current that a high-power relay can produce a closing action. In actual use, to make the high-power relay reliably close, the given voltage can be equal to or slightly higher than the rated operating voltage. Generally, it should not be greater than 1.5 times the rated working voltage. Otherwise the coil will be burned.