·  Full digital controlled regulator, based on DSP

·  On-board machine installation

·  Suitable for all sel f-regulated alternators

·  Voltage supply: 40Vac÷270Vac (from auxiliary winding, output voltage or PMG)

·  Frequency range: 12Hz ÷ 72Hz

·  “Sensing” of voltage with true rms or average measurement (70÷280 Vac)

·  Maximum continuous output current: 4Adc;

·  Precision  of  vol tage  regulation:  ±  1%  from  no-load  to  nominal  load  in  static  condition,  with  any  power factor and for frequency variations ranging from -5% to +20% of the nominal value.

·  Transient power drops and overvoltage within ± 15%

·  Voltage recovery time within ± 3% of the value set, in less than 300 msec.

·  Transient overvoltage during start up: less than 5% of nominal voltage.

·  Single phase sensing

·  Parameters:  VOLT,  STAB,  AMP  and  Hz  can  be  set  with  trimmers  (default)  50/60Hz  through  a “jumper” (default); all parameters can be programmed via software.

·  Analogical  remote  control   of  output  vol tage  is  possible  through  external   voltage  (0÷2,5Vdc)  or  with  a 10 Kohm linear potentiometer.

·  Environmental temperature: -25° C ÷ +70° C

·  Underspeed protection with adjustable threshold and slope

·  Overvoltage and undervoltage alarms

·  Excitation overcurrent protection with delayed intervention

·  Management of temporary short circui ts (start up of asynchronous motors)

·  Open  collector  output  (not  insulated)  signalling  intervention  of  protective  devices  (insulation on optional DI1 module) with programmable activation with respect to the individual alarms and the possibility to de-lay intervention.

·  Abnormal  operation conditions storage (type of alarm, number of events, duration of the last event, total time)

·  Memorization of the regulator operation time (starting from revision 11 of the Firmware)

·  RS232 and RS485 serial communications interface (with optional DI1 module)

WARNING : Operation of the DSR is not specified below 12 Hz.