U.S. Environmental Protection Agency, 26 W. Martin Luther King Dr., Cincinnati, OH 45268

66 -- DIRECT CURRENT DYNAMOMETERS AND CONTROLLERS SOL 98-22 POC Toni Clay (513) 487-2158 E-MAIL: US EPA Cincinnati Contracts Management Division, clay.antoinette@epamail.epa.gov. The U.S. Environmental Protection Agency's Office of Mobile Sources (OMS) in Ann Arbor MI, is seeking to obtain three Direct Current (DC) dynamometers and three solid-state controllers/ drivers with speed and torque mode operation. The DC dynamometer is needed for testing advanced small and light-duty engine technology. The motoring and absorbing capacity of the DC dynamometer shall provide the following nominal load/speed capabilities: 250 volt excitation, 550 amps, rated (150-250) HP absorbing and (120-150) HP motoring at speed 2500/6000 RPM. The dynamometer shall include: external blowers and lubrication for armature bearings, check arms, torque arm, installed load cell, signal conditioner, 60-tooth wheel assembly mounted on the shaft with bi-directional magnetic pickup for speed feedback (included), stator lock, gear rotators, and shaft nuts, trunnion bearing rotators and trunnion mounted on a base measuring 50" x 56" (nominal). Remanufactured dynamometers that meet the above specifications will also be considered. The solid-state controllers/drivers shall be designed, sized, and manufactured specifically to meet the dynamometers' capacity and requirement. The controller shall include the following: Nema 1 enclosure completely wired and tested, solid-state conrol, four quadrant digital regenerative DC drive, disconnect with flange-mounted handle, door-mounted meters armature volts/amps, field weakening controller, drive isolation transformer, operator control panel with illuminated control functions, as follows: dynamometer start/stop, E stop, torque/speed selector, direction selector, speed and torque precision dial indicator, dynamometer digital speed and torque displays, auxiliary motor start and stop, and drive fault indicator. Installation and start-up for the dynamometers and controllers is required. EPA shall provide, before system delivery, in the test cell, bedplate, and power feeds based on the specifications of the dynamometers and contollers. EPA shall also be responsible for setting the dynamometers on the bedplates and contollers/drivers enclosure in the test cell. Issue date for the solicitation document will be approximately August 25, 1998. This is a small business set-aside. The applicable SIC Code is 3826. All interested parties should submit a request in writing to Toni Clay at the above address or by fax (513-487-2107). TELEPHONE REQUESTS WILL NOT BE HONORED. Posted 08/11/98 (W-SN235303). (0223)

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