Basler Electric DECS-400 - Manual (Page 82)

70 9369700990 Rev R
Field Current Sensing – Shunt Rating. The maximum current rating of the field shunt is entered in this
setting field. (The field shunt maximum output must be 50 or 100 mVdc and is detected by the DECS-400
through the Field Isolation Module.) A shunt current rating of 1 to 9,999.0 Adc may be entered in 0.1 Adc
increments.
Field Voltage Isolation Transducer Input. The nominal field voltage is entered in this setting field. The
available setting selections match voltage inputs of the Field Isolation Transducer. A nominal voltage of
63, 125, 250, 375, or 625 Vdc may be selected.
Transient Boost
Note
Effective with firmware version 1.09, transient boost voltage settings
are based on the voltage setpoint. In all previous firmware versions,
transient boost voltage settings were based on the rated voltage.
This function improves response to successive faults by providing increased excitation support. When the
DECS-400 detects a simultaneous increase in line current (Fault Current Threshold setting) and a
decrease in line voltage (Fault Voltage Threshold setting) for a predetermined length of time (Minimum
Fault Duration setting), the DECS-400 responds by elevating the AVR setpoint (Voltage Setpoint Boosting
Level setting) above the nominal setpoint. If the line voltage recovers to the level defined by the Clearing
Voltage Threshold setting for the duration specified by the Clearing Voltage Delay setting, the AVR
setpoint is restored to the nominal value. All transient boost voltage settings are based on the DECS-400
voltage regulation setpoint.
Transient Boost tab functions are shown in Figure 39.
Figure 39. System Configuration Screen, Transient Boost
Discontinuous Transient Excitation Boosting. This setting enables the Discontinuous Transient Excitation
Boosting function.
Fault Voltage Threshold. The threshold for fault voltage is entered in this field. A setting of 0 to 100 may
be entered in 0.1% increments.
BESTCOMS™ Software DECS-400