Electroconvection phenomenon characterized by the motion of a dielectric liquid under the action of an external electric field is of interest in terms of practical use in various electro-processes. The most effective is its application in the processes of heat and mass transfer for both the turbulization and the transport of fluids from the region of the heat input to the region of the heat output. The influence of electroconvection on the heat transfer in various systems of electrodes in single phase and two phase media has been studied in detail. A number of studies on the application of electroconvection for pumping of dielectric liquids has been carried out. However, the performance and efficiency of elecrohydrodynamic (EHD) converters (pumps), in which the energy of the electric field is converted into mechanical energy of directed motion of the fluid are low. The output (pressure-consumable) characteristics of EHD converters to a large extent depend on the kinematic parameters and the organization of electroconvective flows in the interelectrode gap (IEG). In this regard, the paper presents some results of a study of the structure and velocity distribution in the IEG where the electric field is generated by the electrode system wire with a perforated insulating coating and two-wires. This is the most promising electrode system for both the increasing of the productivity and pressure (excess pressure) in multistage EHD converter. The experimental studies were conducted in a transparent flat cell, in which a system of electrodes wire with a perforated insulating coating" (emitter) and two wires (collector) was installed. With the aim to visualize the structure and determine the rate of EHD-flows air bubbles that act as markers have been used. EHD flow recording has been made with a speed digital video camera in transmitted light. As the working fluid the transformer oil has been used. Thee experiments have been made at various potential differences and distances between the electrodes. Determination of the flow velocity in the central jet directed from the emitter to the collector was conducted according to the dynamics of the bubbles with a diameter less than 30 microns. Video recording at high speed (2200 frames / s) allowed recording the motion of each bubble at a sufficiently sharp image. The distribution of the velocity in the central jet, which coincides with the direction of the coordinate axis y has been determined. Directly to the emitter a stationary liquid layer with the thickness of 0.1-0.15 mm is located. Then follows the zone of acceleration up to y ~ 0.4-0.5 mm, which further turns into a region with a constant velocity. Behind the IEG the decrease in the rate of flow is observes. The flow also separates into three parts: the central part and two streams, which return streamlining the collector electrodes. The reverse flows are formed in the form of symmetrical ovals covering the area around the collector electrodes and the IEG. The main power dissipation occurs in the reverse flow, due to which the values of the efficiency of EHD converters are relatively low. The data were obtained on the effect of the flow channel width, the gap between the collector electrodes, and the electrical conductivity of the dielectric fluid on the velocity distribution in the central stream of the EHD flow. Thus, it is shown that in the electrode system wire with a perforated insulating coating and two wires there is a liquid layer adjacent to the emitter, there are zones of acceleration and constant speed, and the region of deceleration, which extends beyond IEG. Using the results obtained at the improvement, development and design of electrohydrodynamic converters allows one to significantly improve their characteristics and the operation reliability.