Abstract: A portable bulk transfer pump assembly (10) constructed in accordance with the principles of a preferred embodiment of the present invention is configured for transferring fluid (not shown) in bulk. The illustrated portable bulk transfer pump assembly (10) broadly includes a portable housing (12) that carries a pumping assembly (14). The portable housing (12) is sized and configured to both support the pumping assembly (14) and enable the entire pump assembly (10) to be readily and easily manually transported to and from pumping locations. The pumping assembly (14) is configured to pump low, medium, and high viscosity fluids utilizing a single pump (52) and a drive assembly (54) drivingly coupled to the pump (52) and selectively adjustable to operate the pump (52) at varying speeds. The illustrated drive assembly (54) includes a motor (80) and a variable speed transmission (82) disposed between the motor (80) and the pump (52).

Abstract: A pump system generally comprising an electrical connector operable to couple with an electric circuit to receive electricity, an electric motor operable to actuate a pump to pump a fluid, and a variable frequency drive (VFD) controller. The VFD controller is operable to control the rotational speed of the electric motor by providing a variable frequency signal to the electric motor to prevent the current utilized by the electric motor from exceeding a maximum current level associated with the electric circuit.