A presently-preferred electrical connector comprises an electrically-conductive terminal pin, and an electrically-insulative connector body comprising a first and a second substantially planar surface and a stud member. A second end of the recirculation conduit is connected to pump means in such manner that a portion of the fluid with specific characteristics within the fluid with specific characteristics supply conduit adjacent the point of service is constantly circulated back. By turning the change-over switch MFB non-conductive at a timing in which the PMOS transistor M1 turns to conductive, the phase compensation between the input and output of the error amplifier EA is cut off. To enable a precise fine adjustment of the cutting gap, fixed blade is held in a fixed one-piece or multiple piece blade holding fixture vertically adjustable by a depth of cut adjusting device for adjusting a vertical depth of cut between the blades. It has become apparent that there is a functional, uniquely defined relationship between the measured insulation resistance and the electrical conductivity of the coolant so that a separate measurement of the electrical conductivity by means of corresponding sensor systems and evaluation means can be dispensed with in the present invention. The support assembly is designed to connect to a lift mount assembly and a blade mount assembly.