SUBMERSIBLE ELECTRIC PUMP PROTECTION AND CONTROL SYSTEM Russian patent published in 2007 - IPC F04D15/00 

FIELD: mechanical engineering; submersible pumps.

SUBSTANCE: invention relates to systems of engineering ecological support and it can be used at elimination of technogenious pollution of ground water. Proposed system contains submersible electric pump 1 to reduce water level and submersible electric pump 2 to produce oil products. Pumps 1 and 2 are connected to power switches 3, 4, respectively, which, in their turn, are connected with control units 5, 6. Control units 5, 6 are connected with water level sensor unit 9 and oil product level sensor unit 13, respectively. Each of control units 5, 6 is provided with intensity setter of voltage supplied to corresponding electric pump, and each power switch 3, 4 is built around antiparallel-connected optron thyristors whose control inputs are connected with output of voltage intensity setter. Unit 9 is made in form of multiwire cable with pairs of contacts 10, 11, 12 electrically activated at different height.

EFFECT: increased reliability of system owing to provision of protection against dynamic shocks and overvoltages.

2 cl, 3 dwg