This discontinued frequency converter series covered a wide range from the compact 3002 models up to the hefty 3250 units.
The drives used pulse-width modulation to convert incoming AC power to DC, then back out as variable-frequency AC for controlling motor speed and torque. Pretty standard approach, but it worked reliably for many years. Efficiency numbers were solid at 96% when running at full load, with power factors spanning 0.9 to 1.0 depending on the specific model and operating conditions. The series handled multiple voltage configurations - 200/230V for smaller applications, 380/415V for general industrial use, and 440/500V for higher-power setups. Each voltage class had its own set of available models within the overall range. Operating temperature specs allowed full-load operation from -10°C up to +45°C, which covered most industrial environments. For storage and transport, the range extended from -30°C to +65°C. Enclosure options ran from basic NEMA 1 (IP21) protection up to NEMA 12 (IP54) for more demanding environments. The drives came with integrated RFI filters and DC chokes as standard equipment, which helped keep harmonic distortion and electromagnetic interference under control. Control features included adjustable ramp times, current limiting functions, and electronic thermal relay protection for connected motors. Parameter settings could be customized for different application needs.
