Specifications include, but are not limited to: 2.1.1 Genset Requirements A. The generator set shall be Standby rated at 250 ekW, 312 kVA, 1800 RPM, 0.80 power factor, 277/480 volts, 3 Phase, 4 wire, 60 hertz, including radiator fan and all parasitic loads. 2.1.2 Material and Parts A. All materials and parts comprising the unit shall be new and unused. 2.1.3 Engine A. The engine shall be compression ignition type diesel fueled, six (6) cylinders, water-cooled, vertical in-line, operating with nominal speed not exceeding 1800 RPM. It shall be sized to deliver the required kW rating. Full pressure lubrication shall be supplied by a positive displacement lube oil pump. The engine shall have air cleaner, coolant, fuel and oil filters with replaceable elements, lube oil cooler and a fuel lift pump. The engine shall have a 24 -volt battery charging DC, alternator with a transistorized voltage regulator. Starting shall be a 24-volt, solenoid shaft, electric starter. 2.1.3.1 Engine Governing A. The engine will be equipped with an isochronous electronic governor to maintain 0% drop from no load to full load and +/- 0.25% steady state frequency variation. 2.2 Generator 2.2.1 Generator Specifications A. The synchronous generator shall be a single bearing, self-ventilated, drip-proof design in accordance with NEMA MG 1 and directly connected to the engine flywheel housing with a flex coupling. 2.2.2 Insulation A. The insulation material shall meet NEMA standards for Class H insulation and be impregnated in a polyester varnish or vacuum impregnated with epoxy varnish to be fungus resistant. The excitation system shall be of brushless construction.