JYB714 electric discharge type liquid level relay works!
when the water level rose to When the water is full of electrodes, the 5 and 6 ends of the electrode through the water resistance through the current to the first transistor base, transistor saturation conduction, the collector was low, the second transistor base without current through the cut, the collector was High level, relay power failure reset cut contactor power supply, pump stop. The above operation is repeated only when the water level falls below the yellow line terminal.
the second transistor base enough current through the transistor saturation conduction, relay (K) was electric pull, Normally open contact (2,3 feet) closed, external contactor was forced suction, pump water supply tank. The water level of the tank gradually increased, and although higher than the sub-bottom electrode, so when the relay was suction state, 6,7 feet connected and 6,5 feet off, the first transistor continues to be cut off;
working principle:
5, 6, 7, respectively, then the water tank of the three control electrode (7 end for the bottom of the box electrode, 6 end is the bottom of the electrode, 5 ends for the water full electrode), when the tank water level is too low (lower than the bottom electrode) , The first transistor is the base of the low level, the transistor was cut off the state, the collector was high;
