DSR AVR Automatic Voltage Regulator for Mecc Alte Diesel Generator Stabilizer Alternator Adjuster

TECHNICAL DATA
The DSR is a voltage regulator for synchronous alternators, designed for stand alone working and calibration; to maximize performance, the regulator should be understood as part of a system made up of at least three components: the DSR (control unit), a communications module (DI1, for example) and a supervision unit, as illustrated in figure 4 or 12.
The connectors for connection to and from the power generator and communications module are located on the DSR regulator.
The supervision unit can be made up of a personal computer, another “synoptic” device or both; it does not have the function of controlling the system in real time, but allows programming and visualisation of all operational parameters of the DSR.
If it is equipped with an RS485 or RS232 serial interface, the DI1 communications module is necessary for its connection.
 
FEATURE
 
• Full digital controlled regulator, based on DSP
• On-board machine installation
• Suitable for all self-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 voltage 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 voltage 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 circuits (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 delay 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.