THE SCHEME WITH THE MULTIPURPOSE RELAY FOR ECONOMY OF ELECTRIC ENERGY IN TO GRAIN THROWER

Abstract

The scheme for economy of electric energy during the work for an example of a grain thrower of the ZME 60 type (Voronezh Region, Semiluki) on grain flows in rural economy is offered. Grain thrower can carry out the following technological operations: loading of grain in vehicles; loading and unloading of grain stores; mechanical shoveling of grain on the open areas; separation of grain with office of light impurity. In the scheme the relay 3UG3521/22t (SIEMENS firm) is used. The relay can carry out multipurpose protection of engines and comprises the relay of the maximum current, the relay of the minimum current, a timer and the index relay. Temporary charts of the relay 3UG3521/22t are provided in the mode "without preservation" and in the mode with "preservation" for the OVER functions (reaction to growth of current) and the UNDER function (reaction to recession of current). Use of the relay 3UG3521/22t allowed to receive protection
at long start-up of electric motors, at an overload of electric motors, when idling (for economy of electric energy due to automatic shutdown of the conveyor) and at break or jamming of the conveyor. Besides, in the scheme it is offered the multipurpose relay of tension (the relay of control of phases) for protection of three engines of a grain thrower at not full-phase modes of a power line. The economy of electric energy can be received in case of, for example, the late actions of the operator for timely shutdown of the engine of a self-feed upon transition of a grain thrower to idling. In practice transition of a grain thrower to the mode of idling is quite often possible in process of reduction of amount of the thrown grain on a platform before a grain thrower. In practice transition of a grain thrower to the mode of idling is quite often possible in process of reduction of amount of the thrown grain on a platform before a grain thrower. The offered electric circuit can be used in the grain thrower and grain loaders in temporary warehouses, granaries and open grain flows.