FIELD: regulating system.
SUBSTANCE: invention relates to automatic digital control and is intended to control systems for filling tanks with liquid. Spheres of application of the invention can be, for example, areas of a first rise of water supply systems for settlements and industrial facilities. Liquid level control system in a storage tank comprises comparison elements connected in series, a fluid flow controller in the form of a frequency converter, controlled member, covered by feedback, proportional integral and differential regulators for level and temperature, totalizers, flow calculation unit, main and reserve pump units. System is equipped with a diagnostic unit of electric motors of the main and reserve pump units, including a microcontroller connected to current and voltage sensors mounted on the power line of electric motors, and temperature sensors of pump bearings of pump units, the system is also equipped with electromagnetic contactors installed between the frequency converter and pump units, and shut-off valves located between the pump units and the storage tank.
EFFECT: increase in the reliability of the liquid level control system in the storage tank.
1 cl, 2 dwg
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