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

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