The DER2 is a digital automatic voltage regulator for synchronous alternators, designed for stand alone working and calibration; the connectors for connection to and from the power generator and to the supervision unit are located on the DER2 regulator.
DER2 includes natively the USB port for computer remote monitoring and control and the HDR module.
The High Dynamic Response allows a faster reduction of excitation current than conventional regulators and consequently a smaller transient overvoltage as a result of load removal.
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 DER2 through the embedded USB port
Precision of voltage regulation (stabilized condition)
± 0,5%
Maximum continuous output current
5 Adc
Environmental temperature
-25°C ÷ +70°C
Voltage regulation
75÷300 Vac
Transient voltage drop and overvoltage
within ± 15%
Voltage recovery time
within ± 3% of the value set, in less than 300 msec
Sensing
Single phase or Three phase
Parameters (can be programmed via software)
VOLT, STAB, AMP and Hz can be set with trimmers (default)
50/60Hz through a “jumper” (default)
Features
Power connections through 20 poles Fast-On connector
Protection of power winding with 5A fast acting fuse
0 ÷ 2,5Vdc or -10 ÷ +10Vdc external voltage for analogical remote control of output voltage
Remote control of output voltage through external potentiometer (from 25Kohm to 100Kohm)
Underspeed protection with adjustable threshold and slope
Overvoltage and undervoltage alarms
Excitation overcurrent protection with delayed intervention
Underexcitation alarm/loss os excitation
Management of temporary short circuits (start up of asynchronous motors)
High Dynamic Response: load removal management unit
Open collector output (not insulated) signalling some allarm intervention with programmable activation in respect of each alarm and possibility of the intervention delay and selectable active level
Allarm conditions storage (type of alarm, number of events, duration of the last event, total time)
Memorization of the regulator operation time
USB communications through the embedded USB port
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