Water tower automatic water supply protection circuit

Circuit working principle: VT. ,VTz,VT3,K. Etc. are the main components of the water pumping circuit
. The water shortage protection circuit is mainly composed of probe d and VT4. If the water pumping time interval is too
long and the water in the pipe drops below d, the water circuit will be damaged. , d is disconnected, VT4 is saturated and turned on,
causing VT. The base is clamped low. When the water level in the water tower drops below the lower limit point, due
to VT. The base is at a low level and cannot conduct, so water cannot be pumped. Only when water is added to the pump
and the water level exceeds point d and VT4 is cut off, the control of VT can be released and the water pumping
circuit can pump water normally, that is, VT. On, VT: cut off, VT3 on, K, pull-in,
K. One: Closed, the water pump pumps water. If the check valve does not leak and the water level in the pipe is above point d,
then when the water level in the water tower drops below point B, the water pump will automatically pump water. VI', VT6,
LED , form the pump water shortage prompt circuit.