21 April 2009 — Cummins Power Generation provided three 2 MW/4160VAC diesel generator sets to a 1.2 million-square-foot hospital in Georgia.
The generators include a paralleling system to provide emergency/standby power from a 4,700-square-foot central energy plant. The new equipment was interfaced to existing transfer switch equipment from several different manufacturers.
WellStar Kennestone Hospital began planning for the new energy facility with the addition of a new 200,000-square-foot cardiac care center. Today, the Cummins generators are housed in the energy plant, about 1,000 feet from the main facility to optimize patient comfort and power distribution to the hospital. The distance between the plant and the hospital plus provisions for anticipated future system growth drove the electrical construction team, led by Inglett & Stubbs LLC, to choose 4,160-volt supply lines to the hospital.
The emergency requirements for the hospital campus are about 2,400 kW with the system serving emergency loads. The system can power up within 10 seconds. With three 2 MW generator sets there is redundancy in place to provide a premium level of reliability for the facility's critical load requirements.