I designed the machine addressed to the farmers and owners of summer houses with auxiliary water supply system, key units of which are a water source (river, lake, well or borehole), water tank electric pump Yes. From analogues this development is characterized in that in addition to performing its main function — control the electric pump makes it quite successfully solve tasks of protection of objects. This unusual flexibility is achieved not by complexity of an electrical circuit device, and by quick-change sensors, which are not only submersible multi-level electrodes and photoresists or thin, working on the rupture of the wire.
The actions of the machine in the system of local supply can be reduced to the actuation of electromagnetic relay K1. After all, it is getting power from the transformer T1 (through the diode bridge VD1 – VD4 and VS1 thyristor, which is controlled by the sensor SL1 water level), enables or disables the pump.
For example, the water in the tank is so small that when switching the switch SA2 to the “Pump” all the sensor electrodes SL1 are open. The control circuit of the thyristor, in fact, idle. Hence, the current through the VS1 and the relay coil K1 is not flowing, and the outlet ХЅ1 through the normally closed contacts K1.1 serves network 220 V, causing the system to replenish the water tank. This continues until, until the last level reach the sensor electrode SL1. That is the maximum for which the thyristor opens and the current flowing through the VS1 and the coil K1, causing relay operation. Rasikas, contacts K1.1 switch off the electric pump. Simultaneously, K1 are closed.2, introducing in the control circuit of the thyristor electrode pair And the sensor SL1 and providing automatic maintenance of the desired water level in the tank.