Basler Electric BE2000E - Manual (Page 26)

18 9287500995 Rev B
BE2000E shuts down. When the BE2000E is powered up following an over-excitation shutdown, the
Overexcitation Shutdown indicator will flash for 5 seconds.
Generator Overvoltage Shutdown
The BE2000E monitors the sensed generator output voltage. If it exceeds the overvoltage setpoint (a
percent of nominal) for 0.75 seconds, the Generator Overvoltage indicator flashes on the front panel LED
and in the Windows communication software, the relay output closes and the BE2000E shuts down.
When the BE2000E is powered up following a generator overvoltage shutdown, the Generator
Overvoltage indicator will flash for 5 seconds. The default setpoint is 120 percent of nominal.
BE2000E Overtemperature Shutdown
A temperature sensor within the BE2000E continually monitors the temperature of the device. If the
temperature exceeds 70
° C (158° F), the BE2000E Overtemperature indicator flashes on the front panel
and in the Windows communication software, the relay output closes and the BE2000E shuts down.
Loss of Generator Sensing Shutdown
The BE2000E monitors the sensed generator output voltage and takes protective action if a loss of
sensing voltage is detected. For single-phase sensing, a sensed voltage of less than 50 percent of
nominal is interpreted as a loss of sensing. For three-phase sensing, the total loss of a sensed phase or
an imbalance between phases of more than 20 percent nominal is interpreted as a loss of sensing. When
sensing input continuity is not lost, an adjustable time delay of 0 to 25 seconds is present when a loss of
sensing condition is detected. If sensing input continuity is lost, the time delay is disabled.
If a loss of sensing occurs, the Loss of Generator Sensing indicator flashes on the front panel and in the
Windows communication software, the relay output closes, and the BE2000E shuts down. When the
BE2000E is powered up following a loss of generator sensing shutdown, the Loss of Sensing indication
will flash for 5 seconds.
This function is disabled when a generator short circuit condition is detected or when sensed frequency
drops below 12 Hz. A generator short-circuit is determined when the phase B CT current exceeds 3PU
(>15 Aac sensing current). Loss of sensing is not active during soft start time.
Overexcitation Limiting (Field Current)
The BE2000E has a field current limit that is factory preset at 6.5 amperes. The limit is adjustable from 0
to 7.5 amperes with an adjustable time delay that has a range of 0 to 10 seconds. Both settings are made
through the Windows communication software. When the overexcitation limit is exceeded, the
Overexcitation Limiting indicator flashes on the front panel and in the Windows communication software.
When the adjustable time delay expires, the relay output closes and the BE2000E shuts down. When the
BE2000E is powered up following overexcitation limiting, the Overexcitation Limiting indicator will flash for
5 seconds.
Crowbar Shutdown
The Crowbar Shutdown Circuit protects the generator rotor from overcurrent damage resulting from a
shorted BE2000E power switch. During operation, if the field voltage exceeds the setpoint and the power
stage receives no gating pulses for 1.5 seconds, the Crowbar Circuit activates and places a short-circuit
across the BE2000E input power terminals. This protects the generator by blowing the input power fuse
and removing operating power from the device.
Generator Soft Start
The BE2000E incorporates an adjustable soft start feature that controls the time for generator voltage to
ramp to the regulation setpoint. The ramp rate is adjustable from 1 to 120 seconds in 1 second
increments through the Windows communication software. The underfrequency feature is also active
during soft start and takes priority in control of the generator voltage. The default setting is 7 seconds.
Functional Description BE2000E