Skip to main content
Loading…
This section is included in your selections.

(a) The generator shall be sized to start and operate the pumps required for firm capacity plus the miscellaneous station loads. Lock-out of the last or standby pump shall be provided in the control system, if other pumps required for firm capacity are running, when on generator power. The interlock shall allow the last or standby to run if any other pump should fail.

(b) The standby generator shall be diesel-driven. The engine shall be of the general purpose, stationary solid injection four-cycle, compression ignition type. Radiator cooling is preferred as opposed to city water cooling.

(c) Maximum speed of the engine shall not exceed 1,800 rpm. The generator shall be of the self regulated type utilizing a brushless excitation system. All accessories needed for proper operation of the set shall be provided. These shall include a hospital type muffler, flexible exhaust connection, vibration isolators, starting battery, battery charger, day tank fuel transfer system, gauges, jacket water heater, antifreeze, underground fuel storage tank with a capacity to sustain full load operation of the generator for two days, engine generator control panel, generator output circuit breaker and automatic transfer switch.

(d) Engine generator control panel shall include automatic-manual-off switch to permit testing of engine, voltmeter and ammeter with selector switches, frequency meter and running time meter, exciter circuit breaker, automatic voltage regulator, oil pressure gauge, coolant temperature gauge, solid state engine monitor with fault lights to indicate engine shutdown for overcrank, overspeed, high coolant temperature and low oil pressure.

(e) The day tank shall include a hand-operated pump in addition to the standard electrically operated pump.

(f) The transfer switch controls shall be solid state, mounted on keyed, plug-in printed circuit boards.

(g) Accessories shall include:

(1) Adjustable close differential voltage sensing on all phases of normal source.

(2) Adjustable time delay (zero to five minutes) on engine starting.

(3) Adjustable time delay (zero to five minutes) on transfer to emergency source.

(4) Adjustable time delay (zero to 30 minutes) on transfer to normal source.

(5) Adjustable time delay (zero to five minutes) unloaded running time delay for cooldown.

(6) Normal and emergency position indicating lights.

(h) The transfer switch shall conform to NEMA and UL 1008 and shall be inherently double-throw and mechanically interlocked so that it is either in a normal or emergency position; no neutral position shall be possible.

(i) For heating and ventilation, see Article V, Heating and Ventilation.

(j) Noise criteria given in WSSC 11.125.490, Noise control, shall be considered in sizing and selecting air intake and exhaust louvers.

(k) Spare Parts and Special Tools. The following spare parts and tools shall be specified to be furnished with the standby generator set:

(1) One set of special engine tools.

(2) Two spare lube oil filters.

(3) One spare filter (if dry type).

(l) Acceptable Manufacturers.

(1) Generator set: Caterpillar, Kohler, or Onan.

(2) Auto transfer switch: Onan or Russelectric. (28-ME-DG-02 § 21.3)