| 摘要 |
PURPOSE:To prevent erroneous function of an auxiliary relay by connecting a resistor, having impedance equal to or lower than the coil impedance of the auxiliary relay, in parallel with the auxiliary relay. CONSTITUTION:A resistor 7 is connected in parallel with an auxiliary relay 3, where the resistance R of the parallel resistor 7 is selected equal to or lower than the inner impedance of the auxiliary relay 3. Under stop state, where a stop command switch 5 is turned OFF by this parallel circuit, current io flowing through the internal circuit of an electronic instantaneous stop restart relay 6 to the circuit of the auxiliary relay 3 is branched into a current i1 flowing through a relay coil and a current i2 flowing through the parallel resistor 7. Consequently, voltage across the operating coil of the auxiliary relay 3 drops below a specified release voltage resulting in a reliable OFF function of an electromagnetic contactor. |
