NBH offers Analog DC Drives with Microprocessor based system upto 300HP ,with inbuilt protections against various abnormalities like overcurrent,field failure,motor over temperature,overload,unbalancing b/w References & motor speed,Wrong Sequence of three phase line phases displayed on LCD based Fault Annunciation system.Our drive technology result in increased production flexibility while reducing life costs.
NBH DC Analogue Drives also known as Variable speed DC drives or Thyristor Drives, we offer our large range of DC drives ranging from 1 HP to 5000 HP. We have more than 2,500 drives installed & are running satisfactorily in India & abroad.
A few of the salient feature of our Drive include :
- Full control three phase interchangeable thyristor bridges
- Drive status indications
- Selection of Armature/Tachogenerator feedback available on card
- Protections: EOC, FLR, Overload, over speed, over temperature, Di / Dt etc
- Input AC supply variations upto ± 15% permitted
- Drive immune to input supply phase sequence
- Surge Voltage Suppression
Snubber Circuits across each power device provided
- Single Phasing Protection
- Adjustable Current Limit 0-150%
- Gradual Acceleration of motor with adjustable ramp time of 2 to 30 seconds
- Front Accessible Test Points at various stages