Tags: Marathon Digital Automatic voltage regulator DVR2000E For Marathon Alternators,AVR DVR2000E,Digital Technology Voltage Regulator DVR2000E.

Description
DVR2000E units have the following features and capabilities.
* Four control modes: automatic voltage regulation (AVR), manual or field current regulation (FCR), power
factor (PF) regulation, and reactive power (Var) regulation.
* Programmable stability settings.
* Soft start control with an adjustable time setting in AVR control mode.
* Overexcitation (OEL) limiting in AVR, Var, and PF control modes.
* Underfrequency (volts/hertz) regulation.
* Crowbar circuitry protects the field.
* Overtemperature protection.
* Three-phase or single-phase generator voltage (RMS) sensing/regulation in AVR mode.
* Single-phase generator current sensing for metering and regulation purposes.
* Field current and field voltage sensing.
* Four contact sensing inputs for system interface.
* One common output relay for alarm indication and trip functions.
* Six protection functions (overexcitation shutdown, generator overvoltage shutdown, DVR overtemperature
shutdown, loss of generator sensing shutdown, overexcitation limiting and crowbar shutdown).
* Generator paralleling with reactive droop compensation and reactive differential compensation.
* Front-panel human-machine interface (HMI) indicates system and DVR2000E status and gives the ability to
make setting changes at the front panel.
* Rear RS-232 communication port for personal computer communication using MARATHON-DVR2000E-32
Windows® based software for fast, user-friendly, setup and control.

True RMS Sensing – One or Three Phase:
Connect the sensing mode you prefer. Senses 95 to 600 volts ±10% at 50/60 hertz. Patented circuitry senses true RMS voltage rather than average for superior load regulation.

Soft-Start Ramp on Initial Start-Up:
Controlled increase to rated voltage. Limits overshoot of voltage during voltage build-up.

Engine Unloading:
Monitors the rate of frequency change during transient conditions. Provides additional voltage dip during speed drop to allow engine to recover faster.

Over voltage Shutdown:
Provides generator protection during sustained overvoltage. The overvoltage point is preset at 20% over normal generator operating voltage, with a preset timeout of 0.75 seconds.

VAR/PF Controller:
Model DVR®2000EC (optional) provides control when paralleled to utility power. VAR or PF control can be selected or changed by regulator adjustment.

Encapsulated Design:
Maximum protection against moisture or abrasive contamination, which can lead to early regulator failure.Tested to MIL-STD-705, Method 711.1C. Salt fog tested to MIL-STD-810E.

Auto/Manual Mode:
Exciter field current can be controlled by the regulator or manually set at a fixed value