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SECTION 1 • GENERAL INFORMATION
GENERAL
The DVR2000E is an electronic, solid-state, microprocessor-based control device. The DVR2000E regulates the
output voltage of a brushless, ac generator by controlling the current into the generator exciter eld. Input power
to the DVR2000E is from a multi-pole, high-frequency, permanent magnet generator (PMG).
The DVR2000E is supplied in an encapsulated package designed for behind-the-panel mounting. The DVR2000E
is held in place by thread-forming screws that thread into its plastic shell. Front panel indicators (LEDs) annunciate
regulator status and system conditions. DVR2000E connections are made through quarter-inch, quick-connect
terminals on the rear panel. A 9-pin DB-9 type connector on the rear panel provides communication between the
DVR2000E and an IBM compatible PC.
FEATURES
DVR2000E units have the following features and capabilities.
• Four control modes: automatic voltage regulation (AVR), manual or eld 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 eld.
• 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 eld 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.
SPECIFICATIONS
DVR2000E electrical and physical specications are listed in the following paragraphs. The adjustment
increments shown apply to the PC software. Adjustment increments for the Front Panel Controls are listed in
Section 2.
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