Basler Electric DECS-400 - Manual (Page 99)

9369700990 Rev R 87
Setpoint. This setting configures the threshold where the level of exported reactive power is limited. The
Setpoint setting range is dependent upon the level of generator apparent power entered on the Rated
Data tab of the System Configuration screen. A setting is entered in kvar in 1 kvar increments.
Time Delay. This setting determines how quickly exported reactive power is limited once it exceeds the
Setpoint threshold. A setting of 0 to 10 seconds may be entered in 0.1 second increments.
Scaling
Scaling tab settings are shown in Figure 53 and described in the following paragraphs.
Figure 53. Limiters Screen, Scaling Tab
Limiter Scaling. The OEL Scale Enable setting can be enabled to adjust overexcitation limiting to
compensate for the level of field current. The SCL Scale Enable setting can be enabled to adjust stator
current limiting to compensate for the level of stator current.
Summing Point OEL Scaling. Scaling of summing-point overexcitation limiting is provided for three levels
(or points) of field current. Each level, or point, has a Signal setting to adjust the scaling level and a Scale
setting to establish the level of field current when the scaling occurs. Each of the three Signal settings has
a setting range of –10 to 10 Vdc with increments of 0.01 Vdc. Each of the three Scale settings is
expressed as a percentage of the rated field current and has a setting range of 0 to 200% with increments
of 0.1%. These settings are enabled only when Summing Point overexcitation limiting is enabled on the
Configuration tab of the Limiters screen.
Takeover OEL Scaling. Scaling of takeover-style overexcitation limiting is provided for three levels (or
points) of field current. Each level, or point, has a Signal setting to adjust the scaling level and a Scale
setting to establish the level of field current when the scaling occurs. Each of the three Signal settings has
a setting range of –10 to 10 Vdc with increments of 0.01 Vdc. Each of the three Scale settings is
expressed as a percentage of the rated field current and has a setting range of 0 to 200% with increments
of 0.1%. These settings are enabled only when Takeover overexcitation limiting is enabled on the
Configuration tab of the Limiters screen.
SCL Scaling. Scaling of stator current limiting is provided for three levels (or points) of stator current.
Each level, or point, has a Signal setting to adjust the scaling level and a Scale setting to establish the
level of stator current when the scaling occurs. Each of the three Signal settings has a setting range of –
10 to 10 Vdc with increments of 0.01 Vdc. Each of the three Scale settings is expressed as a percentage
of the rated stator current and has a setting range of 0 to 200% with increments of 0.1%.
DECS-400 BESTCOMS™ Software