Workshop Manual STAMFORD / AvK DM110 AVR

FEATURES
DM110 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 and voltage buildup control with an adjustable ramp in AVR control mode.
Excitation limiting, overexcitation limiting (OEL) and underexcitation limiting (UEL) in AVR, Var, and PF control
modes.
Underfrequency (volts/hertz) regulation.
Dwell (% volts/second) regulation aids speed recovery of turbocharged engines.
Generator-to-bus voltage matching
Three-phase or single-phase generator voltage (rms) sensing/regulation in AVR mode.
Single-phase bus voltage (rms) sensing.
Single-phase generator current sensing for metering and regulation purposes.
Field current and field voltage sensing.
One analog input for proportional remote control of the setpoint.
Five contact sensing inputs for system interface.
One common output relay for alarm indication and trip functions.
Three protection functions: field overvoltage, generator overvoltage, and loss of sensing.
Generator paralleling with reactive droop compensation and reactive differential compensation.
Phase compensation accommodates various phase relationships between sensed voltage and sensed current
RS-232 communication port for personal computer communication using BESTCOMS Windows® based software
for fast, user-friendly, setup and control.

SPECIFICATIONS
DM110 specifications and qualifications are listed in the following paragraphs.
Operating Power
Refer to Section 4, Installation for special requirements concerning the application of operating power during DM110
programming and the application of station power.
Voltage: 88 to 250 Vac, single-phase or three-phase (L-L)
Frequency: 50 to 400 Hz
Burden: 650 VA
Voltage Buildup: 6 Vac
Terminals: 3, 4, 5