| 摘要 |
FIELD: electricity.SUBSTANCE: electromagnetic relay control circuit (10) has the relay coil (11) and the switching contacts with the first switching device (13a), located between the first terminal of the relay coil (11) and the first voltage source (12a), the second switching device (13b), located between the second terminal of the relay coil (11) and the zero potential, and the control device (14). The second voltage source (12b ) with higher voltage level is provided, which through the third switching device (13c), connected parallel with the first switching device (13a), is connected to the first terminal of the relays coil (11). The control device (14) allows for passing of current through the relay coil (11) at first to close all three devices (13a, 13b, 13s) and after the pre-set time interval the third device (13s) again to open, and the first and the second devices (13a, 13b) to keep closed.EFFECT: providing the simple and cost-saving control circuit with short reaction time.6 cl, 3 dwg |
