Instrumental electronics offers dc motor drives, series dcd 8000. These are thyristorised, analogue dc motor drives used for dc motors above 5 hp rating. These consists of standard features as given below:
- soft start,
- isolated field supply,
- trips and alarms for under/over voltage,
- average over current,
- instantaneous over current,
- field failure,
- negative phase sequence, along with the option of armature or tacho feedback, and
- work in constant torque mode.
Variable speed is achieved either through a potentiometer or through process signal. Power supply requireed is 3-phase/415 v ac.
