PUMPING OR VENTILATION PLANTS GROUPED CONTROL STATION Russian patent published in 1999 - IPC

FIELD: automatic remote control of water supply and ventilation systems of thermal power stations, objects of public utilities, technological systems of municipal heating networks and compressor systems with automatic maintaining of preset technological parameters. SUBSTANCE: the grouped control station uses inlet and outlet manifolds connected to the suction and feed lines of pumps or fans, program control unit and a combination switching system. The system has the first contactors for connection of electric motors to the power network and the second contactors for their connection to the output of the frequency conversion unit. The mentioned unit is connected to the power network via the power input, and to the control output of the control unit via the control input. The switching system is furnished with the third contactors for connection of electric motors to the output of the voltage conversion unit, and with safety mechanisms, each of them being kinematically linked through levers with the second and one of the two other contactors connected to the same electric motor and made for prevention of shorting of more than one of the two contactors. The drives of the third contactors are connected to the master outputs of the control unit, and the latter is furnished with facilities for logical selection of plant for connection of its electric motor to one of the conversion units. EFFECT: expanded range of algorithms of starts and shutdowns of each plant. 5 cl, 5 dwg