1333 Bulletin Adjustable Frequency AC Drive

Originally introduced in late 80’s, these AFAC drives have been used anywhere variable speed operation is required in a standard induction motor.  Operating off single phase or 3 phase lines at 50/60 Hz and 230, 460 or 575 Volts AC these drives cover the horsepower range of 3/4 to 50 HP (1.2 to 56 kVA). The system is contained in a NEMA Type 1 enclosure.

These are easily programmed sine weighted pulse-width modulated transistorized drives operating between 0.5 Hz and 240 Hz with a controllable Volts/Hertz output. A 150% overload capability is available as a programming option. Typical applications use a 10k Ohm speed potentiometer or an external 4-20 mA speed reference, start and stop buttons with a Forward/Reverse switch.

Common options available for this drive include a remote operator station, preset speeds, adjustable minimum speed, a BCD interface and heavy duty dynamic breaking to increase breaking torque from approximately 20% to 100%.

These drives are highly serviceable and easily repaired by Control System Labs. From the control system, the 6-diode converter, bulk capacitors to the transistorized inverter section; most parts for this series are still available.  Why replace your drive forcing you to re-engineer your system when you can easily repair it?