Basler Electric BE2000E - Manual (Page 23)

9287500995 Rev B 15
Var/Power Factor Control (52J/K)
Closing a contact across terminals 52J and 52K disables var/power factor control. An open contact
enables the BE2000E to control the generator reactive power in either the var or the power factor mode.
For more information, refer to the Parallel Generator Compensation (52L/M) contact input.
Parallel Generator Compensation (52L/M)
Closing a contact across terminals 52L and 52M disables parallel operation. An open contact enables
parallel operation and the BE2000E operates in reactive droop compensation mode.
The 52J/K input has priority. Therefore, if the 52J/K and the 52L/M inputs are both open, the system
operates in var/power factor mode.
Communication Port
The communication port provides the interface for user programming (setup) of the BE2000E. Connection
is made to the female RS-232 (DB-9) connector with a user-supplied, standard 9-pin cable. The
communication port is optically isolated and is powered from a transformer-isolated supply.
Microprocessor
The microprocessor is the heart of the BE2000E and performs measurement, computation, control, and
communication functions by the use of its embedded programming and the nonvolatile settings stored in
its memory.
Power Input Stage
Input power is applied to terminals 3 and 4 from the PMG. It is rectified and filtered before being applied
to the power amplifier and the power supply. Input power is single-phase in the range of 180 to 240 Vac
at a frequency of 200 to 360 hertz.
Power Supply
The internal switch-mode power supply receives power from the power input stage and supplies power at
the required dc voltage levels to the internal circuitry of the BE2000E.
Power Amplifier Stage
The power amplifier receives power from the power input stage and supplies a controlled amount of
power to the exciter field via terminals F+ and F
–. The amount of power supplied to the exciter field is
based on gating pulses received from the microprocessor. The power amplifier uses a solid state power
switch to provide the required power to the exciter field. Power amplifier output to the field is rated up to
75 Vdc at 3 Adc continuous and 150 Vdc at 7.5 Adc for 10 seconds.
Front Panel Indicators
Twelve front panel LED indicators light to indicate various operating modes, protective functions, and
adjustments. The Human-Machine Interface chapter provides more information about the front panel
indicators.
Front Panel Switches
Changes to settings can be made at the front panel using the three pushbutton switches. These push-
buttons are labeled Select, Up, and Down. The Human-Machine Interface chapter provides more in-
formation about the front panel switches.
Relay Output
A common alarm output contact is provided through terminals AL1 and AL2. This normally open, form A
contact annunciates alarm or generator trip conditions and closes in the event of a protective shutdown or
transfer. The relay output is non-latching.
BE2000E Functional Description