Abstract: A modular electrical substation for erection at a prepared site has a horizontal steel base formed of interconnected longitudinal and transverse beams and is set on the prepared site. An open top oil containment pan is centrally supported on the base and receives an electrical transformer therein. A pair of vertically extending frameworks formed of steel columns and connecting cross members are mounted on opposite ends of the base. One or more bays of circuit breakers and disconnect switches are supported on the base and frameworks. Incoming and outgoing conductors are dead ended on one or both of the frameworks which are connected by guy wires extending therebetween to distribute the conductor tension among the two frameworks. The central location of the transformer maintains the base in position on the prepared site avoiding the need for additional anchoring and/or foundations enabling the substation to be removable and reusable.